2 * Copyright (C) 2005-2007 Brian Paul All Rights Reserved.
3 * Copyright (C) 2008 VMware, Inc. All Rights Reserved.
4 * Copyright © 2010 Intel Corporation
5 * Copyright © 2011 Bryan Cain
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice (including the next
15 * paragraph) shall be included in all copies or substantial portions of the
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
24 * DEALINGS IN THE SOFTWARE.
28 * \file glsl_to_tgsi.cpp
30 * Translate GLSL IR to TGSI.
34 #include "main/compiler.h"
36 #include "ir_visitor.h"
37 #include "ir_expression_flattening.h"
38 #include "glsl_types.h"
39 #include "glsl_parser_extras.h"
40 #include "../glsl/program.h"
41 #include "ir_optimization.h"
44 #include "main/mtypes.h"
45 #include "main/shaderobj.h"
46 #include "main/uniforms.h"
47 #include "main/shaderapi.h"
48 #include "program/hash_table.h"
49 #include "program/prog_instruction.h"
50 #include "program/prog_optimize.h"
51 #include "program/prog_print.h"
52 #include "program/program.h"
53 #include "program/prog_parameter.h"
54 #include "program/sampler.h"
56 #include "pipe/p_compiler.h"
57 #include "pipe/p_context.h"
58 #include "pipe/p_screen.h"
59 #include "pipe/p_shader_tokens.h"
60 #include "pipe/p_state.h"
61 #include "util/u_math.h"
62 #include "tgsi/tgsi_ureg.h"
63 #include "tgsi/tgsi_info.h"
64 #include "st_context.h"
65 #include "st_program.h"
66 #include "st_glsl_to_tgsi.h"
67 #include "st_mesa_to_tgsi.h"
70 #define PROGRAM_IMMEDIATE PROGRAM_FILE_MAX
71 #define PROGRAM_ANY_CONST ((1 << PROGRAM_STATE_VAR) | \
72 (1 << PROGRAM_CONSTANT) | \
73 (1 << PROGRAM_UNIFORM))
76 * Maximum number of arrays
78 #define MAX_ARRAYS 256
80 #define MAX_GLSL_TEXTURE_OFFSET 4
85 static int swizzle_for_size(int size
);
88 * This struct is a corresponding struct to TGSI ureg_src.
92 st_src_reg(gl_register_file file
, int index
, const glsl_type
*type
)
96 if (type
&& (type
->is_scalar() || type
->is_vector() || type
->is_matrix()))
97 this->swizzle
= swizzle_for_size(type
->vector_elements
);
99 this->swizzle
= SWIZZLE_XYZW
;
102 this->type
= type
? type
->base_type
: GLSL_TYPE_ERROR
;
103 this->reladdr
= NULL
;
104 this->reladdr2
= NULL
;
105 this->has_index2
= false;
108 st_src_reg(gl_register_file file
, int index
, int type
)
114 this->swizzle
= SWIZZLE_XYZW
;
116 this->reladdr
= NULL
;
117 this->reladdr2
= NULL
;
118 this->has_index2
= false;
121 st_src_reg(gl_register_file file
, int index
, int type
, int index2D
)
126 this->index2D
= index2D
;
127 this->swizzle
= SWIZZLE_XYZW
;
129 this->reladdr
= NULL
;
130 this->reladdr2
= NULL
;
131 this->has_index2
= false;
136 this->type
= GLSL_TYPE_ERROR
;
137 this->file
= PROGRAM_UNDEFINED
;
142 this->reladdr
= NULL
;
143 this->reladdr2
= NULL
;
144 this->has_index2
= false;
147 explicit st_src_reg(st_dst_reg reg
);
149 gl_register_file file
; /**< PROGRAM_* from Mesa */
150 int index
; /**< temporary index, VERT_ATTRIB_*, VARYING_SLOT_*, etc. */
152 GLuint swizzle
; /**< SWIZZLE_XYZWONEZERO swizzles from Mesa. */
153 int negate
; /**< NEGATE_XYZW mask from mesa */
154 int type
; /** GLSL_TYPE_* from GLSL IR (enum glsl_base_type) */
155 /** Register index should be offset by the integer in this reg. */
157 st_src_reg
*reladdr2
;
163 st_dst_reg(gl_register_file file
, int writemask
, int type
, int index
)
167 this->writemask
= writemask
;
168 this->cond_mask
= COND_TR
;
169 this->reladdr
= NULL
;
173 st_dst_reg(gl_register_file file
, int writemask
, int type
)
177 this->writemask
= writemask
;
178 this->cond_mask
= COND_TR
;
179 this->reladdr
= NULL
;
185 this->type
= GLSL_TYPE_ERROR
;
186 this->file
= PROGRAM_UNDEFINED
;
189 this->cond_mask
= COND_TR
;
190 this->reladdr
= NULL
;
193 explicit st_dst_reg(st_src_reg reg
);
195 gl_register_file file
; /**< PROGRAM_* from Mesa */
196 int index
; /**< temporary index, VERT_ATTRIB_*, VARYING_SLOT_*, etc. */
197 int writemask
; /**< Bitfield of WRITEMASK_[XYZW] */
199 int type
; /** GLSL_TYPE_* from GLSL IR (enum glsl_base_type) */
200 /** Register index should be offset by the integer in this reg. */
204 st_src_reg::st_src_reg(st_dst_reg reg
)
206 this->type
= reg
.type
;
207 this->file
= reg
.file
;
208 this->index
= reg
.index
;
209 this->swizzle
= SWIZZLE_XYZW
;
211 this->reladdr
= reg
.reladdr
;
213 this->reladdr2
= NULL
;
214 this->has_index2
= false;
217 st_dst_reg::st_dst_reg(st_src_reg reg
)
219 this->type
= reg
.type
;
220 this->file
= reg
.file
;
221 this->index
= reg
.index
;
222 this->writemask
= WRITEMASK_XYZW
;
223 this->cond_mask
= COND_TR
;
224 this->reladdr
= reg
.reladdr
;
227 class glsl_to_tgsi_instruction
: public exec_node
{
229 DECLARE_RALLOC_CXX_OPERATORS(glsl_to_tgsi_instruction
)
234 /** Pointer to the ir source this tree came from for debugging */
236 GLboolean cond_update
;
238 st_src_reg sampler
; /**< sampler register */
239 int sampler_array_size
; /**< 1-based size of sampler array, 1 if not array */
240 int tex_target
; /**< One of TEXTURE_*_INDEX */
241 GLboolean tex_shadow
;
243 st_src_reg tex_offsets
[MAX_GLSL_TEXTURE_OFFSET
];
244 unsigned tex_offset_num_offset
;
245 int dead_mask
; /**< Used in dead code elimination */
247 class function_entry
*function
; /* Set on TGSI_OPCODE_CAL or TGSI_OPCODE_BGNSUB */
250 class variable_storage
: public exec_node
{
252 variable_storage(ir_variable
*var
, gl_register_file file
, int index
)
253 : file(file
), index(index
), var(var
)
258 gl_register_file file
;
260 ir_variable
*var
; /* variable that maps to this, if any */
263 class immediate_storage
: public exec_node
{
265 immediate_storage(gl_constant_value
*values
, int size
, int type
)
267 memcpy(this->values
, values
, size
* sizeof(gl_constant_value
));
272 gl_constant_value values
[4];
273 int size
; /**< Number of components (1-4) */
274 int type
; /**< GL_FLOAT, GL_INT, GL_BOOL, or GL_UNSIGNED_INT */
277 class function_entry
: public exec_node
{
279 ir_function_signature
*sig
;
282 * identifier of this function signature used by the program.
284 * At the point that TGSI instructions for function calls are
285 * generated, we don't know the address of the first instruction of
286 * the function body. So we make the BranchTarget that is called a
287 * small integer and rewrite them during set_branchtargets().
292 * Pointer to first instruction of the function body.
294 * Set during function body emits after main() is processed.
296 glsl_to_tgsi_instruction
*bgn_inst
;
299 * Index of the first instruction of the function body in actual TGSI.
301 * Set after conversion from glsl_to_tgsi_instruction to TGSI.
305 /** Storage for the return value. */
306 st_src_reg return_reg
;
309 struct glsl_to_tgsi_visitor
: public ir_visitor
{
311 glsl_to_tgsi_visitor();
312 ~glsl_to_tgsi_visitor();
314 function_entry
*current_function
;
316 struct gl_context
*ctx
;
317 struct gl_program
*prog
;
318 struct gl_shader_program
*shader_program
;
319 struct gl_shader
*shader
;
320 struct gl_shader_compiler_options
*options
;
324 unsigned array_sizes
[MAX_ARRAYS
];
327 int num_address_regs
;
329 bool indirect_addr_consts
;
332 bool native_integers
;
335 variable_storage
*find_variable_storage(ir_variable
*var
);
337 int add_constant(gl_register_file file
, gl_constant_value values
[4],
338 int size
, int datatype
, GLuint
*swizzle_out
);
340 function_entry
*get_function_signature(ir_function_signature
*sig
);
342 st_src_reg
get_temp(const glsl_type
*type
);
343 void reladdr_to_temp(ir_instruction
*ir
, st_src_reg
*reg
, int *num_reladdr
);
345 st_src_reg
st_src_reg_for_float(float val
);
346 st_src_reg
st_src_reg_for_int(int val
);
347 st_src_reg
st_src_reg_for_type(int type
, int val
);
350 * \name Visit methods
352 * As typical for the visitor pattern, there must be one \c visit method for
353 * each concrete subclass of \c ir_instruction. Virtual base classes within
354 * the hierarchy should not have \c visit methods.
357 virtual void visit(ir_variable
*);
358 virtual void visit(ir_loop
*);
359 virtual void visit(ir_loop_jump
*);
360 virtual void visit(ir_function_signature
*);
361 virtual void visit(ir_function
*);
362 virtual void visit(ir_expression
*);
363 virtual void visit(ir_swizzle
*);
364 virtual void visit(ir_dereference_variable
*);
365 virtual void visit(ir_dereference_array
*);
366 virtual void visit(ir_dereference_record
*);
367 virtual void visit(ir_assignment
*);
368 virtual void visit(ir_constant
*);
369 virtual void visit(ir_call
*);
370 virtual void visit(ir_return
*);
371 virtual void visit(ir_discard
*);
372 virtual void visit(ir_texture
*);
373 virtual void visit(ir_if
*);
374 virtual void visit(ir_emit_vertex
*);
375 virtual void visit(ir_end_primitive
*);
380 /** List of variable_storage */
383 /** List of immediate_storage */
384 exec_list immediates
;
385 unsigned num_immediates
;
387 /** List of function_entry */
388 exec_list function_signatures
;
389 int next_signature_id
;
391 /** List of glsl_to_tgsi_instruction */
392 exec_list instructions
;
394 glsl_to_tgsi_instruction
*emit(ir_instruction
*ir
, unsigned op
);
396 glsl_to_tgsi_instruction
*emit(ir_instruction
*ir
, unsigned op
,
397 st_dst_reg dst
, st_src_reg src0
);
399 glsl_to_tgsi_instruction
*emit(ir_instruction
*ir
, unsigned op
,
400 st_dst_reg dst
, st_src_reg src0
, st_src_reg src1
);
402 glsl_to_tgsi_instruction
*emit(ir_instruction
*ir
, unsigned op
,
404 st_src_reg src0
, st_src_reg src1
, st_src_reg src2
);
406 glsl_to_tgsi_instruction
*emit(ir_instruction
*ir
, unsigned op
,
408 st_src_reg src0
, st_src_reg src1
,
409 st_src_reg src2
, st_src_reg src3
);
411 unsigned get_opcode(ir_instruction
*ir
, unsigned op
,
413 st_src_reg src0
, st_src_reg src1
);
416 * Emit the correct dot-product instruction for the type of arguments
418 glsl_to_tgsi_instruction
*emit_dp(ir_instruction
*ir
,
424 void emit_scalar(ir_instruction
*ir
, unsigned op
,
425 st_dst_reg dst
, st_src_reg src0
);
427 void emit_scalar(ir_instruction
*ir
, unsigned op
,
428 st_dst_reg dst
, st_src_reg src0
, st_src_reg src1
);
430 void emit_arl(ir_instruction
*ir
, st_dst_reg dst
, st_src_reg src0
);
432 void emit_scs(ir_instruction
*ir
, unsigned op
,
433 st_dst_reg dst
, const st_src_reg
&src
);
435 bool try_emit_mad(ir_expression
*ir
,
437 bool try_emit_mad_for_and_not(ir_expression
*ir
,
440 void emit_swz(ir_expression
*ir
);
442 bool process_move_condition(ir_rvalue
*ir
);
444 void simplify_cmp(void);
446 void rename_temp_register(int index
, int new_index
);
447 int get_first_temp_read(int index
);
448 int get_first_temp_write(int index
);
449 int get_last_temp_read(int index
);
450 int get_last_temp_write(int index
);
452 void copy_propagate(void);
453 int eliminate_dead_code(void);
454 void merge_registers(void);
455 void renumber_registers(void);
457 void emit_block_mov(ir_assignment
*ir
, const struct glsl_type
*type
,
458 st_dst_reg
*l
, st_src_reg
*r
,
459 st_src_reg
*cond
, bool cond_swap
);
464 static st_src_reg undef_src
= st_src_reg(PROGRAM_UNDEFINED
, 0, GLSL_TYPE_ERROR
);
466 static st_dst_reg undef_dst
= st_dst_reg(PROGRAM_UNDEFINED
, SWIZZLE_NOOP
, GLSL_TYPE_ERROR
);
468 static st_dst_reg address_reg
= st_dst_reg(PROGRAM_ADDRESS
, WRITEMASK_X
, GLSL_TYPE_FLOAT
, 0);
469 static st_dst_reg address_reg2
= st_dst_reg(PROGRAM_ADDRESS
, WRITEMASK_X
, GLSL_TYPE_FLOAT
, 1);
470 static st_dst_reg sampler_reladdr
= st_dst_reg(PROGRAM_ADDRESS
, WRITEMASK_X
, GLSL_TYPE_FLOAT
, 2);
473 fail_link(struct gl_shader_program
*prog
, const char *fmt
, ...) PRINTFLIKE(2, 3);
476 fail_link(struct gl_shader_program
*prog
, const char *fmt
, ...)
480 ralloc_vasprintf_append(&prog
->InfoLog
, fmt
, args
);
483 prog
->LinkStatus
= GL_FALSE
;
487 swizzle_for_size(int size
)
489 static const int size_swizzles
[4] = {
490 MAKE_SWIZZLE4(SWIZZLE_X
, SWIZZLE_X
, SWIZZLE_X
, SWIZZLE_X
),
491 MAKE_SWIZZLE4(SWIZZLE_X
, SWIZZLE_Y
, SWIZZLE_Y
, SWIZZLE_Y
),
492 MAKE_SWIZZLE4(SWIZZLE_X
, SWIZZLE_Y
, SWIZZLE_Z
, SWIZZLE_Z
),
493 MAKE_SWIZZLE4(SWIZZLE_X
, SWIZZLE_Y
, SWIZZLE_Z
, SWIZZLE_W
),
496 assert((size
>= 1) && (size
<= 4));
497 return size_swizzles
[size
- 1];
501 is_tex_instruction(unsigned opcode
)
503 const tgsi_opcode_info
* info
= tgsi_get_opcode_info(opcode
);
508 num_inst_dst_regs(unsigned opcode
)
510 const tgsi_opcode_info
* info
= tgsi_get_opcode_info(opcode
);
511 return info
->num_dst
;
515 num_inst_src_regs(unsigned opcode
)
517 const tgsi_opcode_info
* info
= tgsi_get_opcode_info(opcode
);
518 return info
->is_tex
? info
->num_src
- 1 : info
->num_src
;
521 glsl_to_tgsi_instruction
*
522 glsl_to_tgsi_visitor::emit(ir_instruction
*ir
, unsigned op
,
524 st_src_reg src0
, st_src_reg src1
,
525 st_src_reg src2
, st_src_reg src3
)
527 glsl_to_tgsi_instruction
*inst
= new(mem_ctx
) glsl_to_tgsi_instruction();
528 int num_reladdr
= 0, i
;
530 op
= get_opcode(ir
, op
, dst
, src0
, src1
);
532 /* If we have to do relative addressing, we want to load the ARL
533 * reg directly for one of the regs, and preload the other reladdr
534 * sources into temps.
536 num_reladdr
+= dst
.reladdr
!= NULL
;
537 num_reladdr
+= src0
.reladdr
!= NULL
|| src0
.reladdr2
!= NULL
;
538 num_reladdr
+= src1
.reladdr
!= NULL
|| src1
.reladdr2
!= NULL
;
539 num_reladdr
+= src2
.reladdr
!= NULL
|| src2
.reladdr2
!= NULL
;
540 num_reladdr
+= src3
.reladdr
!= NULL
|| src3
.reladdr2
!= NULL
;
542 reladdr_to_temp(ir
, &src3
, &num_reladdr
);
543 reladdr_to_temp(ir
, &src2
, &num_reladdr
);
544 reladdr_to_temp(ir
, &src1
, &num_reladdr
);
545 reladdr_to_temp(ir
, &src0
, &num_reladdr
);
548 emit_arl(ir
, address_reg
, *dst
.reladdr
);
551 assert(num_reladdr
== 0);
562 inst
->function
= NULL
;
564 /* Update indirect addressing status used by TGSI */
567 case PROGRAM_STATE_VAR
:
568 case PROGRAM_CONSTANT
:
569 case PROGRAM_UNIFORM
:
570 this->indirect_addr_consts
= true;
572 case PROGRAM_IMMEDIATE
:
573 assert(!"immediates should not have indirect addressing");
580 for (i
= 0; i
< 4; i
++) {
581 if(inst
->src
[i
].reladdr
) {
582 switch(inst
->src
[i
].file
) {
583 case PROGRAM_STATE_VAR
:
584 case PROGRAM_CONSTANT
:
585 case PROGRAM_UNIFORM
:
586 this->indirect_addr_consts
= true;
588 case PROGRAM_IMMEDIATE
:
589 assert(!"immediates should not have indirect addressing");
598 this->instructions
.push_tail(inst
);
603 glsl_to_tgsi_instruction
*
604 glsl_to_tgsi_visitor::emit(ir_instruction
*ir
, unsigned op
,
605 st_dst_reg dst
, st_src_reg src0
,
606 st_src_reg src1
, st_src_reg src2
)
608 return emit(ir
, op
, dst
, src0
, src1
, src2
, undef_src
);
611 glsl_to_tgsi_instruction
*
612 glsl_to_tgsi_visitor::emit(ir_instruction
*ir
, unsigned op
,
613 st_dst_reg dst
, st_src_reg src0
, st_src_reg src1
)
615 return emit(ir
, op
, dst
, src0
, src1
, undef_src
, undef_src
);
618 glsl_to_tgsi_instruction
*
619 glsl_to_tgsi_visitor::emit(ir_instruction
*ir
, unsigned op
,
620 st_dst_reg dst
, st_src_reg src0
)
622 assert(dst
.writemask
!= 0);
623 return emit(ir
, op
, dst
, src0
, undef_src
, undef_src
, undef_src
);
626 glsl_to_tgsi_instruction
*
627 glsl_to_tgsi_visitor::emit(ir_instruction
*ir
, unsigned op
)
629 return emit(ir
, op
, undef_dst
, undef_src
, undef_src
, undef_src
, undef_src
);
633 * Determines whether to use an integer, unsigned integer, or float opcode
634 * based on the operands and input opcode, then emits the result.
637 glsl_to_tgsi_visitor::get_opcode(ir_instruction
*ir
, unsigned op
,
639 st_src_reg src0
, st_src_reg src1
)
641 int type
= GLSL_TYPE_FLOAT
;
643 if (op
== TGSI_OPCODE_MOV
)
646 assert(src0
.type
!= GLSL_TYPE_ARRAY
);
647 assert(src0
.type
!= GLSL_TYPE_STRUCT
);
648 assert(src1
.type
!= GLSL_TYPE_ARRAY
);
649 assert(src1
.type
!= GLSL_TYPE_STRUCT
);
651 if (src0
.type
== GLSL_TYPE_FLOAT
|| src1
.type
== GLSL_TYPE_FLOAT
)
652 type
= GLSL_TYPE_FLOAT
;
653 else if (native_integers
)
654 type
= src0
.type
== GLSL_TYPE_BOOL
? GLSL_TYPE_INT
: src0
.type
;
656 #define case4(c, f, i, u) \
657 case TGSI_OPCODE_##c: \
658 if (type == GLSL_TYPE_INT) \
659 op = TGSI_OPCODE_##i; \
660 else if (type == GLSL_TYPE_UINT) \
661 op = TGSI_OPCODE_##u; \
663 op = TGSI_OPCODE_##f; \
666 #define case3(f, i, u) case4(f, f, i, u)
667 #define case2fi(f, i) case4(f, f, i, i)
668 #define case2iu(i, u) case4(i, LAST, i, u)
670 #define casecomp(c, f, i, u) \
671 case TGSI_OPCODE_##c: \
672 if (type == GLSL_TYPE_INT) \
673 op = TGSI_OPCODE_##i; \
674 else if (type == GLSL_TYPE_UINT) \
675 op = TGSI_OPCODE_##u; \
676 else if (native_integers) \
677 op = TGSI_OPCODE_##f; \
679 op = TGSI_OPCODE_##c; \
686 case3(DIV
, IDIV
, UDIV
);
687 case3(MAX
, IMAX
, UMAX
);
688 case3(MIN
, IMIN
, UMIN
);
691 casecomp(SEQ
, FSEQ
, USEQ
, USEQ
);
692 casecomp(SNE
, FSNE
, USNE
, USNE
);
693 casecomp(SGE
, FSGE
, ISGE
, USGE
);
694 casecomp(SLT
, FSLT
, ISLT
, USLT
);
699 case3(ABS
, IABS
, IABS
);
703 case2iu(IMUL_HI
, UMUL_HI
);
707 assert(op
!= TGSI_OPCODE_LAST
);
711 glsl_to_tgsi_instruction
*
712 glsl_to_tgsi_visitor::emit_dp(ir_instruction
*ir
,
713 st_dst_reg dst
, st_src_reg src0
, st_src_reg src1
,
716 static const unsigned dot_opcodes
[] = {
717 TGSI_OPCODE_DP2
, TGSI_OPCODE_DP3
, TGSI_OPCODE_DP4
720 return emit(ir
, dot_opcodes
[elements
- 2], dst
, src0
, src1
);
724 * Emits TGSI scalar opcodes to produce unique answers across channels.
726 * Some TGSI opcodes are scalar-only, like ARB_fp/vp. The src X
727 * channel determines the result across all channels. So to do a vec4
728 * of this operation, we want to emit a scalar per source channel used
729 * to produce dest channels.
732 glsl_to_tgsi_visitor::emit_scalar(ir_instruction
*ir
, unsigned op
,
734 st_src_reg orig_src0
, st_src_reg orig_src1
)
737 int done_mask
= ~dst
.writemask
;
739 /* TGSI RCP is a scalar operation splatting results to all channels,
740 * like ARB_fp/vp. So emit as many RCPs as necessary to cover our
743 for (i
= 0; i
< 4; i
++) {
744 GLuint this_mask
= (1 << i
);
745 glsl_to_tgsi_instruction
*inst
;
746 st_src_reg src0
= orig_src0
;
747 st_src_reg src1
= orig_src1
;
749 if (done_mask
& this_mask
)
752 GLuint src0_swiz
= GET_SWZ(src0
.swizzle
, i
);
753 GLuint src1_swiz
= GET_SWZ(src1
.swizzle
, i
);
754 for (j
= i
+ 1; j
< 4; j
++) {
755 /* If there is another enabled component in the destination that is
756 * derived from the same inputs, generate its value on this pass as
759 if (!(done_mask
& (1 << j
)) &&
760 GET_SWZ(src0
.swizzle
, j
) == src0_swiz
&&
761 GET_SWZ(src1
.swizzle
, j
) == src1_swiz
) {
762 this_mask
|= (1 << j
);
765 src0
.swizzle
= MAKE_SWIZZLE4(src0_swiz
, src0_swiz
,
766 src0_swiz
, src0_swiz
);
767 src1
.swizzle
= MAKE_SWIZZLE4(src1_swiz
, src1_swiz
,
768 src1_swiz
, src1_swiz
);
770 inst
= emit(ir
, op
, dst
, src0
, src1
);
771 inst
->dst
.writemask
= this_mask
;
772 done_mask
|= this_mask
;
777 glsl_to_tgsi_visitor::emit_scalar(ir_instruction
*ir
, unsigned op
,
778 st_dst_reg dst
, st_src_reg src0
)
780 st_src_reg undef
= undef_src
;
782 undef
.swizzle
= SWIZZLE_XXXX
;
784 emit_scalar(ir
, op
, dst
, src0
, undef
);
788 glsl_to_tgsi_visitor::emit_arl(ir_instruction
*ir
,
789 st_dst_reg dst
, st_src_reg src0
)
791 int op
= TGSI_OPCODE_ARL
;
793 if (src0
.type
== GLSL_TYPE_INT
|| src0
.type
== GLSL_TYPE_UINT
)
794 op
= TGSI_OPCODE_UARL
;
796 assert(dst
.file
== PROGRAM_ADDRESS
);
797 if (dst
.index
>= this->num_address_regs
)
798 this->num_address_regs
= dst
.index
+ 1;
800 emit(NULL
, op
, dst
, src0
);
804 * Emit an TGSI_OPCODE_SCS instruction
806 * The \c SCS opcode functions a bit differently than the other TGSI opcodes.
807 * Instead of splatting its result across all four components of the
808 * destination, it writes one value to the \c x component and another value to
809 * the \c y component.
811 * \param ir IR instruction being processed
812 * \param op Either \c TGSI_OPCODE_SIN or \c TGSI_OPCODE_COS depending
813 * on which value is desired.
814 * \param dst Destination register
815 * \param src Source register
818 glsl_to_tgsi_visitor::emit_scs(ir_instruction
*ir
, unsigned op
,
820 const st_src_reg
&src
)
822 /* Vertex programs cannot use the SCS opcode.
824 if (this->prog
->Target
== GL_VERTEX_PROGRAM_ARB
) {
825 emit_scalar(ir
, op
, dst
, src
);
829 const unsigned component
= (op
== TGSI_OPCODE_SIN
) ? 0 : 1;
830 const unsigned scs_mask
= (1U << component
);
831 int done_mask
= ~dst
.writemask
;
834 assert(op
== TGSI_OPCODE_SIN
|| op
== TGSI_OPCODE_COS
);
836 /* If there are compnents in the destination that differ from the component
837 * that will be written by the SCS instrution, we'll need a temporary.
839 if (scs_mask
!= unsigned(dst
.writemask
)) {
840 tmp
= get_temp(glsl_type::vec4_type
);
843 for (unsigned i
= 0; i
< 4; i
++) {
844 unsigned this_mask
= (1U << i
);
845 st_src_reg src0
= src
;
847 if ((done_mask
& this_mask
) != 0)
850 /* The source swizzle specified which component of the source generates
851 * sine / cosine for the current component in the destination. The SCS
852 * instruction requires that this value be swizzle to the X component.
853 * Replace the current swizzle with a swizzle that puts the source in
856 unsigned src0_swiz
= GET_SWZ(src
.swizzle
, i
);
858 src0
.swizzle
= MAKE_SWIZZLE4(src0_swiz
, src0_swiz
,
859 src0_swiz
, src0_swiz
);
860 for (unsigned j
= i
+ 1; j
< 4; j
++) {
861 /* If there is another enabled component in the destination that is
862 * derived from the same inputs, generate its value on this pass as
865 if (!(done_mask
& (1 << j
)) &&
866 GET_SWZ(src0
.swizzle
, j
) == src0_swiz
) {
867 this_mask
|= (1 << j
);
871 if (this_mask
!= scs_mask
) {
872 glsl_to_tgsi_instruction
*inst
;
873 st_dst_reg tmp_dst
= st_dst_reg(tmp
);
875 /* Emit the SCS instruction.
877 inst
= emit(ir
, TGSI_OPCODE_SCS
, tmp_dst
, src0
);
878 inst
->dst
.writemask
= scs_mask
;
880 /* Move the result of the SCS instruction to the desired location in
883 tmp
.swizzle
= MAKE_SWIZZLE4(component
, component
,
884 component
, component
);
885 inst
= emit(ir
, TGSI_OPCODE_SCS
, dst
, tmp
);
886 inst
->dst
.writemask
= this_mask
;
888 /* Emit the SCS instruction to write directly to the destination.
890 glsl_to_tgsi_instruction
*inst
= emit(ir
, TGSI_OPCODE_SCS
, dst
, src0
);
891 inst
->dst
.writemask
= scs_mask
;
894 done_mask
|= this_mask
;
899 glsl_to_tgsi_visitor::add_constant(gl_register_file file
,
900 gl_constant_value values
[4], int size
, int datatype
,
903 if (file
== PROGRAM_CONSTANT
) {
904 return _mesa_add_typed_unnamed_constant(this->prog
->Parameters
, values
,
905 size
, datatype
, swizzle_out
);
908 immediate_storage
*entry
;
909 assert(file
== PROGRAM_IMMEDIATE
);
911 /* Search immediate storage to see if we already have an identical
912 * immediate that we can use instead of adding a duplicate entry.
914 foreach_in_list(immediate_storage
, entry
, &this->immediates
) {
915 if (entry
->size
== size
&&
916 entry
->type
== datatype
&&
917 !memcmp(entry
->values
, values
, size
* sizeof(gl_constant_value
))) {
923 /* Add this immediate to the list. */
924 entry
= new(mem_ctx
) immediate_storage(values
, size
, datatype
);
925 this->immediates
.push_tail(entry
);
926 this->num_immediates
++;
932 glsl_to_tgsi_visitor::st_src_reg_for_float(float val
)
934 st_src_reg
src(PROGRAM_IMMEDIATE
, -1, GLSL_TYPE_FLOAT
);
935 union gl_constant_value uval
;
938 src
.index
= add_constant(src
.file
, &uval
, 1, GL_FLOAT
, &src
.swizzle
);
944 glsl_to_tgsi_visitor::st_src_reg_for_int(int val
)
946 st_src_reg
src(PROGRAM_IMMEDIATE
, -1, GLSL_TYPE_INT
);
947 union gl_constant_value uval
;
949 assert(native_integers
);
952 src
.index
= add_constant(src
.file
, &uval
, 1, GL_INT
, &src
.swizzle
);
958 glsl_to_tgsi_visitor::st_src_reg_for_type(int type
, int val
)
961 return type
== GLSL_TYPE_FLOAT
? st_src_reg_for_float(val
) :
962 st_src_reg_for_int(val
);
964 return st_src_reg_for_float(val
);
968 type_size(const struct glsl_type
*type
)
973 switch (type
->base_type
) {
976 case GLSL_TYPE_FLOAT
:
978 if (type
->is_matrix()) {
979 return type
->matrix_columns
;
981 /* Regardless of size of vector, it gets a vec4. This is bad
982 * packing for things like floats, but otherwise arrays become a
983 * mess. Hopefully a later pass over the code can pack scalars
984 * down if appropriate.
988 case GLSL_TYPE_ARRAY
:
989 assert(type
->length
> 0);
990 return type_size(type
->fields
.array
) * type
->length
;
991 case GLSL_TYPE_STRUCT
:
993 for (i
= 0; i
< type
->length
; i
++) {
994 size
+= type_size(type
->fields
.structure
[i
].type
);
997 case GLSL_TYPE_SAMPLER
:
998 case GLSL_TYPE_IMAGE
:
999 /* Samplers take up one slot in UNIFORMS[], but they're baked in
1003 case GLSL_TYPE_ATOMIC_UINT
:
1004 case GLSL_TYPE_INTERFACE
:
1005 case GLSL_TYPE_VOID
:
1006 case GLSL_TYPE_ERROR
:
1007 case GLSL_TYPE_DOUBLE
:
1008 assert(!"Invalid type in type_size");
1015 * In the initial pass of codegen, we assign temporary numbers to
1016 * intermediate results. (not SSA -- variable assignments will reuse
1020 glsl_to_tgsi_visitor::get_temp(const glsl_type
*type
)
1024 src
.type
= native_integers
? type
->base_type
: GLSL_TYPE_FLOAT
;
1028 if (!options
->EmitNoIndirectTemp
&&
1029 (type
->is_array() || type
->is_matrix())) {
1031 src
.file
= PROGRAM_ARRAY
;
1032 src
.index
= next_array
<< 16 | 0x8000;
1033 array_sizes
[next_array
] = type_size(type
);
1037 src
.file
= PROGRAM_TEMPORARY
;
1038 src
.index
= next_temp
;
1039 next_temp
+= type_size(type
);
1042 if (type
->is_array() || type
->is_record()) {
1043 src
.swizzle
= SWIZZLE_NOOP
;
1045 src
.swizzle
= swizzle_for_size(type
->vector_elements
);
1052 glsl_to_tgsi_visitor::find_variable_storage(ir_variable
*var
)
1055 foreach_in_list(variable_storage
, entry
, &this->variables
) {
1056 if (entry
->var
== var
)
1064 glsl_to_tgsi_visitor::visit(ir_variable
*ir
)
1066 if (strcmp(ir
->name
, "gl_FragCoord") == 0) {
1067 struct gl_fragment_program
*fp
= (struct gl_fragment_program
*)this->prog
;
1069 fp
->OriginUpperLeft
= ir
->data
.origin_upper_left
;
1070 fp
->PixelCenterInteger
= ir
->data
.pixel_center_integer
;
1073 if (ir
->data
.mode
== ir_var_uniform
&& strncmp(ir
->name
, "gl_", 3) == 0) {
1075 const ir_state_slot
*const slots
= ir
->get_state_slots();
1076 assert(slots
!= NULL
);
1078 /* Check if this statevar's setup in the STATE file exactly
1079 * matches how we'll want to reference it as a
1080 * struct/array/whatever. If not, then we need to move it into
1081 * temporary storage and hope that it'll get copy-propagated
1084 for (i
= 0; i
< ir
->get_num_state_slots(); i
++) {
1085 if (slots
[i
].swizzle
!= SWIZZLE_XYZW
) {
1090 variable_storage
*storage
;
1092 if (i
== ir
->get_num_state_slots()) {
1093 /* We'll set the index later. */
1094 storage
= new(mem_ctx
) variable_storage(ir
, PROGRAM_STATE_VAR
, -1);
1095 this->variables
.push_tail(storage
);
1099 /* The variable_storage constructor allocates slots based on the size
1100 * of the type. However, this had better match the number of state
1101 * elements that we're going to copy into the new temporary.
1103 assert((int) ir
->get_num_state_slots() == type_size(ir
->type
));
1105 dst
= st_dst_reg(get_temp(ir
->type
));
1107 storage
= new(mem_ctx
) variable_storage(ir
, dst
.file
, dst
.index
);
1109 this->variables
.push_tail(storage
);
1113 for (unsigned int i
= 0; i
< ir
->get_num_state_slots(); i
++) {
1114 int index
= _mesa_add_state_reference(this->prog
->Parameters
,
1115 (gl_state_index
*)slots
[i
].tokens
);
1117 if (storage
->file
== PROGRAM_STATE_VAR
) {
1118 if (storage
->index
== -1) {
1119 storage
->index
= index
;
1121 assert(index
== storage
->index
+ (int)i
);
1124 /* We use GLSL_TYPE_FLOAT here regardless of the actual type of
1125 * the data being moved since MOV does not care about the type of
1126 * data it is moving, and we don't want to declare registers with
1127 * array or struct types.
1129 st_src_reg
src(PROGRAM_STATE_VAR
, index
, GLSL_TYPE_FLOAT
);
1130 src
.swizzle
= slots
[i
].swizzle
;
1131 emit(ir
, TGSI_OPCODE_MOV
, dst
, src
);
1132 /* even a float takes up a whole vec4 reg in a struct/array. */
1137 if (storage
->file
== PROGRAM_TEMPORARY
&&
1138 dst
.index
!= storage
->index
+ (int) ir
->get_num_state_slots()) {
1139 fail_link(this->shader_program
,
1140 "failed to load builtin uniform `%s' (%d/%d regs loaded)\n",
1141 ir
->name
, dst
.index
- storage
->index
,
1142 type_size(ir
->type
));
1148 glsl_to_tgsi_visitor::visit(ir_loop
*ir
)
1150 emit(NULL
, TGSI_OPCODE_BGNLOOP
);
1152 visit_exec_list(&ir
->body_instructions
, this);
1154 emit(NULL
, TGSI_OPCODE_ENDLOOP
);
1158 glsl_to_tgsi_visitor::visit(ir_loop_jump
*ir
)
1161 case ir_loop_jump::jump_break
:
1162 emit(NULL
, TGSI_OPCODE_BRK
);
1164 case ir_loop_jump::jump_continue
:
1165 emit(NULL
, TGSI_OPCODE_CONT
);
1172 glsl_to_tgsi_visitor::visit(ir_function_signature
*ir
)
1179 glsl_to_tgsi_visitor::visit(ir_function
*ir
)
1181 /* Ignore function bodies other than main() -- we shouldn't see calls to
1182 * them since they should all be inlined before we get to glsl_to_tgsi.
1184 if (strcmp(ir
->name
, "main") == 0) {
1185 const ir_function_signature
*sig
;
1188 sig
= ir
->matching_signature(NULL
, &empty
, false);
1192 foreach_in_list(ir_instruction
, ir
, &sig
->body
) {
1199 glsl_to_tgsi_visitor::try_emit_mad(ir_expression
*ir
, int mul_operand
)
1201 int nonmul_operand
= 1 - mul_operand
;
1203 st_dst_reg result_dst
;
1205 ir_expression
*expr
= ir
->operands
[mul_operand
]->as_expression();
1206 if (!expr
|| expr
->operation
!= ir_binop_mul
)
1209 expr
->operands
[0]->accept(this);
1211 expr
->operands
[1]->accept(this);
1213 ir
->operands
[nonmul_operand
]->accept(this);
1216 this->result
= get_temp(ir
->type
);
1217 result_dst
= st_dst_reg(this->result
);
1218 result_dst
.writemask
= (1 << ir
->type
->vector_elements
) - 1;
1219 emit(ir
, TGSI_OPCODE_MAD
, result_dst
, a
, b
, c
);
1225 * Emit MAD(a, -b, a) instead of AND(a, NOT(b))
1227 * The logic values are 1.0 for true and 0.0 for false. Logical-and is
1228 * implemented using multiplication, and logical-or is implemented using
1229 * addition. Logical-not can be implemented as (true - x), or (1.0 - x).
1230 * As result, the logical expression (a & !b) can be rewritten as:
1234 * - (a * 1) - (a * b)
1238 * This final expression can be implemented as a single MAD(a, -b, a)
1242 glsl_to_tgsi_visitor::try_emit_mad_for_and_not(ir_expression
*ir
, int try_operand
)
1244 const int other_operand
= 1 - try_operand
;
1247 ir_expression
*expr
= ir
->operands
[try_operand
]->as_expression();
1248 if (!expr
|| expr
->operation
!= ir_unop_logic_not
)
1251 ir
->operands
[other_operand
]->accept(this);
1253 expr
->operands
[0]->accept(this);
1256 b
.negate
= ~b
.negate
;
1258 this->result
= get_temp(ir
->type
);
1259 emit(ir
, TGSI_OPCODE_MAD
, st_dst_reg(this->result
), a
, b
, a
);
1265 glsl_to_tgsi_visitor::reladdr_to_temp(ir_instruction
*ir
,
1266 st_src_reg
*reg
, int *num_reladdr
)
1268 if (!reg
->reladdr
&& !reg
->reladdr2
)
1271 if (reg
->reladdr
) emit_arl(ir
, address_reg
, *reg
->reladdr
);
1272 if (reg
->reladdr2
) emit_arl(ir
, address_reg2
, *reg
->reladdr2
);
1274 if (*num_reladdr
!= 1) {
1275 st_src_reg temp
= get_temp(glsl_type::vec4_type
);
1277 emit(ir
, TGSI_OPCODE_MOV
, st_dst_reg(temp
), *reg
);
1285 glsl_to_tgsi_visitor::visit(ir_expression
*ir
)
1287 unsigned int operand
;
1288 st_src_reg op
[Elements(ir
->operands
)];
1289 st_src_reg result_src
;
1290 st_dst_reg result_dst
;
1292 /* Quick peephole: Emit MAD(a, b, c) instead of ADD(MUL(a, b), c)
1294 if (ir
->operation
== ir_binop_add
) {
1295 if (try_emit_mad(ir
, 1))
1297 if (try_emit_mad(ir
, 0))
1301 /* Quick peephole: Emit OPCODE_MAD(-a, -b, a) instead of AND(a, NOT(b))
1303 if (!native_integers
&& ir
->operation
== ir_binop_logic_and
) {
1304 if (try_emit_mad_for_and_not(ir
, 1))
1306 if (try_emit_mad_for_and_not(ir
, 0))
1310 if (ir
->operation
== ir_quadop_vector
)
1311 assert(!"ir_quadop_vector should have been lowered");
1313 for (operand
= 0; operand
< ir
->get_num_operands(); operand
++) {
1314 this->result
.file
= PROGRAM_UNDEFINED
;
1315 ir
->operands
[operand
]->accept(this);
1316 if (this->result
.file
== PROGRAM_UNDEFINED
) {
1317 printf("Failed to get tree for expression operand:\n");
1318 ir
->operands
[operand
]->print();
1322 op
[operand
] = this->result
;
1324 /* Matrix expression operands should have been broken down to vector
1325 * operations already.
1327 assert(!ir
->operands
[operand
]->type
->is_matrix());
1330 int vector_elements
= ir
->operands
[0]->type
->vector_elements
;
1331 if (ir
->operands
[1]) {
1332 vector_elements
= MAX2(vector_elements
,
1333 ir
->operands
[1]->type
->vector_elements
);
1336 this->result
.file
= PROGRAM_UNDEFINED
;
1338 /* Storage for our result. Ideally for an assignment we'd be using
1339 * the actual storage for the result here, instead.
1341 result_src
= get_temp(ir
->type
);
1342 /* convenience for the emit functions below. */
1343 result_dst
= st_dst_reg(result_src
);
1344 /* Limit writes to the channels that will be used by result_src later.
1345 * This does limit this temp's use as a temporary for multi-instruction
1348 result_dst
.writemask
= (1 << ir
->type
->vector_elements
) - 1;
1350 switch (ir
->operation
) {
1351 case ir_unop_logic_not
:
1352 if (result_dst
.type
!= GLSL_TYPE_FLOAT
)
1353 emit(ir
, TGSI_OPCODE_NOT
, result_dst
, op
[0]);
1355 /* Previously 'SEQ dst, src, 0.0' was used for this. However, many
1356 * older GPUs implement SEQ using multiple instructions (i915 uses two
1357 * SGE instructions and a MUL instruction). Since our logic values are
1358 * 0.0 and 1.0, 1-x also implements !x.
1360 op
[0].negate
= ~op
[0].negate
;
1361 emit(ir
, TGSI_OPCODE_ADD
, result_dst
, op
[0], st_src_reg_for_float(1.0));
1365 if (result_dst
.type
== GLSL_TYPE_INT
|| result_dst
.type
== GLSL_TYPE_UINT
)
1366 emit(ir
, TGSI_OPCODE_INEG
, result_dst
, op
[0]);
1368 op
[0].negate
= ~op
[0].negate
;
1373 emit(ir
, TGSI_OPCODE_ABS
, result_dst
, op
[0]);
1376 emit(ir
, TGSI_OPCODE_SSG
, result_dst
, op
[0]);
1379 emit_scalar(ir
, TGSI_OPCODE_RCP
, result_dst
, op
[0]);
1383 emit_scalar(ir
, TGSI_OPCODE_EX2
, result_dst
, op
[0]);
1387 assert(!"not reached: should be handled by ir_explog_to_explog2");
1390 emit_scalar(ir
, TGSI_OPCODE_LG2
, result_dst
, op
[0]);
1393 emit_scalar(ir
, TGSI_OPCODE_SIN
, result_dst
, op
[0]);
1396 emit_scalar(ir
, TGSI_OPCODE_COS
, result_dst
, op
[0]);
1398 case ir_unop_sin_reduced
:
1399 emit_scs(ir
, TGSI_OPCODE_SIN
, result_dst
, op
[0]);
1401 case ir_unop_cos_reduced
:
1402 emit_scs(ir
, TGSI_OPCODE_COS
, result_dst
, op
[0]);
1404 case ir_unop_saturate
: {
1405 glsl_to_tgsi_instruction
*inst
;
1406 inst
= emit(ir
, TGSI_OPCODE_MOV
, result_dst
, op
[0]);
1407 inst
->saturate
= true;
1412 case ir_unop_dFdx_coarse
:
1413 emit(ir
, TGSI_OPCODE_DDX
, result_dst
, op
[0]);
1415 case ir_unop_dFdx_fine
:
1416 emit(ir
, TGSI_OPCODE_DDX_FINE
, result_dst
, op
[0]);
1419 case ir_unop_dFdy_coarse
:
1420 case ir_unop_dFdy_fine
:
1422 /* The X component contains 1 or -1 depending on whether the framebuffer
1423 * is a FBO or the window system buffer, respectively.
1424 * It is then multiplied with the source operand of DDY.
1426 static const gl_state_index transform_y_state
[STATE_LENGTH
]
1427 = { STATE_INTERNAL
, STATE_FB_WPOS_Y_TRANSFORM
};
1429 unsigned transform_y_index
=
1430 _mesa_add_state_reference(this->prog
->Parameters
,
1433 st_src_reg transform_y
= st_src_reg(PROGRAM_STATE_VAR
,
1435 glsl_type::vec4_type
);
1436 transform_y
.swizzle
= SWIZZLE_XXXX
;
1438 st_src_reg temp
= get_temp(glsl_type::vec4_type
);
1440 emit(ir
, TGSI_OPCODE_MUL
, st_dst_reg(temp
), transform_y
, op
[0]);
1441 emit(ir
, ir
->operation
== ir_unop_dFdy_fine
?
1442 TGSI_OPCODE_DDY_FINE
: TGSI_OPCODE_DDY
, result_dst
, temp
);
1446 case ir_unop_noise
: {
1447 /* At some point, a motivated person could add a better
1448 * implementation of noise. Currently not even the nvidia
1449 * binary drivers do anything more than this. In any case, the
1450 * place to do this is in the GL state tracker, not the poor
1453 emit(ir
, TGSI_OPCODE_MOV
, result_dst
, st_src_reg_for_float(0.5));
1458 emit(ir
, TGSI_OPCODE_ADD
, result_dst
, op
[0], op
[1]);
1461 emit(ir
, TGSI_OPCODE_SUB
, result_dst
, op
[0], op
[1]);
1465 emit(ir
, TGSI_OPCODE_MUL
, result_dst
, op
[0], op
[1]);
1468 if (result_dst
.type
== GLSL_TYPE_FLOAT
)
1469 assert(!"not reached: should be handled by ir_div_to_mul_rcp");
1471 emit(ir
, TGSI_OPCODE_DIV
, result_dst
, op
[0], op
[1]);
1474 if (result_dst
.type
== GLSL_TYPE_FLOAT
)
1475 assert(!"ir_binop_mod should have been converted to b * fract(a/b)");
1477 emit(ir
, TGSI_OPCODE_MOD
, result_dst
, op
[0], op
[1]);
1481 emit(ir
, TGSI_OPCODE_SLT
, result_dst
, op
[0], op
[1]);
1483 case ir_binop_greater
:
1484 emit(ir
, TGSI_OPCODE_SLT
, result_dst
, op
[1], op
[0]);
1486 case ir_binop_lequal
:
1487 emit(ir
, TGSI_OPCODE_SGE
, result_dst
, op
[1], op
[0]);
1489 case ir_binop_gequal
:
1490 emit(ir
, TGSI_OPCODE_SGE
, result_dst
, op
[0], op
[1]);
1492 case ir_binop_equal
:
1493 emit(ir
, TGSI_OPCODE_SEQ
, result_dst
, op
[0], op
[1]);
1495 case ir_binop_nequal
:
1496 emit(ir
, TGSI_OPCODE_SNE
, result_dst
, op
[0], op
[1]);
1498 case ir_binop_all_equal
:
1499 /* "==" operator producing a scalar boolean. */
1500 if (ir
->operands
[0]->type
->is_vector() ||
1501 ir
->operands
[1]->type
->is_vector()) {
1502 st_src_reg temp
= get_temp(native_integers
?
1503 glsl_type::get_instance(ir
->operands
[0]->type
->base_type
, 4, 1) :
1504 glsl_type::vec4_type
);
1506 if (native_integers
) {
1507 st_dst_reg temp_dst
= st_dst_reg(temp
);
1508 st_src_reg temp1
= st_src_reg(temp
), temp2
= st_src_reg(temp
);
1510 emit(ir
, TGSI_OPCODE_SEQ
, st_dst_reg(temp
), op
[0], op
[1]);
1512 /* Emit 1-3 AND operations to combine the SEQ results. */
1513 switch (ir
->operands
[0]->type
->vector_elements
) {
1517 temp_dst
.writemask
= WRITEMASK_Y
;
1518 temp1
.swizzle
= SWIZZLE_YYYY
;
1519 temp2
.swizzle
= SWIZZLE_ZZZZ
;
1520 emit(ir
, TGSI_OPCODE_AND
, temp_dst
, temp1
, temp2
);
1523 temp_dst
.writemask
= WRITEMASK_X
;
1524 temp1
.swizzle
= SWIZZLE_XXXX
;
1525 temp2
.swizzle
= SWIZZLE_YYYY
;
1526 emit(ir
, TGSI_OPCODE_AND
, temp_dst
, temp1
, temp2
);
1527 temp_dst
.writemask
= WRITEMASK_Y
;
1528 temp1
.swizzle
= SWIZZLE_ZZZZ
;
1529 temp2
.swizzle
= SWIZZLE_WWWW
;
1530 emit(ir
, TGSI_OPCODE_AND
, temp_dst
, temp1
, temp2
);
1533 temp1
.swizzle
= SWIZZLE_XXXX
;
1534 temp2
.swizzle
= SWIZZLE_YYYY
;
1535 emit(ir
, TGSI_OPCODE_AND
, result_dst
, temp1
, temp2
);
1537 emit(ir
, TGSI_OPCODE_SNE
, st_dst_reg(temp
), op
[0], op
[1]);
1539 /* After the dot-product, the value will be an integer on the
1540 * range [0,4]. Zero becomes 1.0, and positive values become zero.
1542 emit_dp(ir
, result_dst
, temp
, temp
, vector_elements
);
1544 /* Negating the result of the dot-product gives values on the range
1545 * [-4, 0]. Zero becomes 1.0, and negative values become zero.
1546 * This is achieved using SGE.
1548 st_src_reg sge_src
= result_src
;
1549 sge_src
.negate
= ~sge_src
.negate
;
1550 emit(ir
, TGSI_OPCODE_SGE
, result_dst
, sge_src
, st_src_reg_for_float(0.0));
1553 emit(ir
, TGSI_OPCODE_SEQ
, result_dst
, op
[0], op
[1]);
1556 case ir_binop_any_nequal
:
1557 /* "!=" operator producing a scalar boolean. */
1558 if (ir
->operands
[0]->type
->is_vector() ||
1559 ir
->operands
[1]->type
->is_vector()) {
1560 st_src_reg temp
= get_temp(native_integers
?
1561 glsl_type::get_instance(ir
->operands
[0]->type
->base_type
, 4, 1) :
1562 glsl_type::vec4_type
);
1563 emit(ir
, TGSI_OPCODE_SNE
, st_dst_reg(temp
), op
[0], op
[1]);
1565 if (native_integers
) {
1566 st_dst_reg temp_dst
= st_dst_reg(temp
);
1567 st_src_reg temp1
= st_src_reg(temp
), temp2
= st_src_reg(temp
);
1569 /* Emit 1-3 OR operations to combine the SNE results. */
1570 switch (ir
->operands
[0]->type
->vector_elements
) {
1574 temp_dst
.writemask
= WRITEMASK_Y
;
1575 temp1
.swizzle
= SWIZZLE_YYYY
;
1576 temp2
.swizzle
= SWIZZLE_ZZZZ
;
1577 emit(ir
, TGSI_OPCODE_OR
, temp_dst
, temp1
, temp2
);
1580 temp_dst
.writemask
= WRITEMASK_X
;
1581 temp1
.swizzle
= SWIZZLE_XXXX
;
1582 temp2
.swizzle
= SWIZZLE_YYYY
;
1583 emit(ir
, TGSI_OPCODE_OR
, temp_dst
, temp1
, temp2
);
1584 temp_dst
.writemask
= WRITEMASK_Y
;
1585 temp1
.swizzle
= SWIZZLE_ZZZZ
;
1586 temp2
.swizzle
= SWIZZLE_WWWW
;
1587 emit(ir
, TGSI_OPCODE_OR
, temp_dst
, temp1
, temp2
);
1590 temp1
.swizzle
= SWIZZLE_XXXX
;
1591 temp2
.swizzle
= SWIZZLE_YYYY
;
1592 emit(ir
, TGSI_OPCODE_OR
, result_dst
, temp1
, temp2
);
1594 /* After the dot-product, the value will be an integer on the
1595 * range [0,4]. Zero stays zero, and positive values become 1.0.
1597 glsl_to_tgsi_instruction
*const dp
=
1598 emit_dp(ir
, result_dst
, temp
, temp
, vector_elements
);
1599 if (this->prog
->Target
== GL_FRAGMENT_PROGRAM_ARB
) {
1600 /* The clamping to [0,1] can be done for free in the fragment
1601 * shader with a saturate.
1603 dp
->saturate
= true;
1605 /* Negating the result of the dot-product gives values on the range
1606 * [-4, 0]. Zero stays zero, and negative values become 1.0. This
1607 * achieved using SLT.
1609 st_src_reg slt_src
= result_src
;
1610 slt_src
.negate
= ~slt_src
.negate
;
1611 emit(ir
, TGSI_OPCODE_SLT
, result_dst
, slt_src
, st_src_reg_for_float(0.0));
1615 emit(ir
, TGSI_OPCODE_SNE
, result_dst
, op
[0], op
[1]);
1620 assert(ir
->operands
[0]->type
->is_vector());
1622 if (native_integers
) {
1623 int dst_swizzle
= 0, op0_swizzle
, i
;
1624 st_src_reg accum
= op
[0];
1626 op0_swizzle
= op
[0].swizzle
;
1627 accum
.swizzle
= MAKE_SWIZZLE4(GET_SWZ(op0_swizzle
, 0),
1628 GET_SWZ(op0_swizzle
, 0),
1629 GET_SWZ(op0_swizzle
, 0),
1630 GET_SWZ(op0_swizzle
, 0));
1631 for (i
= 0; i
< 4; i
++) {
1632 if (result_dst
.writemask
& (1 << i
)) {
1633 dst_swizzle
= MAKE_SWIZZLE4(i
, i
, i
, i
);
1638 assert(ir
->operands
[0]->type
->is_boolean());
1640 /* OR all the components together, since they should be either 0 or ~0
1642 switch (ir
->operands
[0]->type
->vector_elements
) {
1644 op
[0].swizzle
= MAKE_SWIZZLE4(GET_SWZ(op0_swizzle
, 3),
1645 GET_SWZ(op0_swizzle
, 3),
1646 GET_SWZ(op0_swizzle
, 3),
1647 GET_SWZ(op0_swizzle
, 3));
1648 emit(ir
, TGSI_OPCODE_OR
, result_dst
, accum
, op
[0]);
1649 accum
= st_src_reg(result_dst
);
1650 accum
.swizzle
= dst_swizzle
;
1653 op
[0].swizzle
= MAKE_SWIZZLE4(GET_SWZ(op0_swizzle
, 2),
1654 GET_SWZ(op0_swizzle
, 2),
1655 GET_SWZ(op0_swizzle
, 2),
1656 GET_SWZ(op0_swizzle
, 2));
1657 emit(ir
, TGSI_OPCODE_OR
, result_dst
, accum
, op
[0]);
1658 accum
= st_src_reg(result_dst
);
1659 accum
.swizzle
= dst_swizzle
;
1662 op
[0].swizzle
= MAKE_SWIZZLE4(GET_SWZ(op0_swizzle
, 1),
1663 GET_SWZ(op0_swizzle
, 1),
1664 GET_SWZ(op0_swizzle
, 1),
1665 GET_SWZ(op0_swizzle
, 1));
1666 emit(ir
, TGSI_OPCODE_OR
, result_dst
, accum
, op
[0]);
1669 assert(!"Unexpected vector size");
1673 /* After the dot-product, the value will be an integer on the
1674 * range [0,4]. Zero stays zero, and positive values become 1.0.
1676 glsl_to_tgsi_instruction
*const dp
=
1677 emit_dp(ir
, result_dst
, op
[0], op
[0],
1678 ir
->operands
[0]->type
->vector_elements
);
1679 if (this->prog
->Target
== GL_FRAGMENT_PROGRAM_ARB
&&
1680 result_dst
.type
== GLSL_TYPE_FLOAT
) {
1681 /* The clamping to [0,1] can be done for free in the fragment
1682 * shader with a saturate.
1684 dp
->saturate
= true;
1685 } else if (result_dst
.type
== GLSL_TYPE_FLOAT
) {
1686 /* Negating the result of the dot-product gives values on the range
1687 * [-4, 0]. Zero stays zero, and negative values become 1.0. This
1688 * is achieved using SLT.
1690 st_src_reg slt_src
= result_src
;
1691 slt_src
.negate
= ~slt_src
.negate
;
1692 emit(ir
, TGSI_OPCODE_SLT
, result_dst
, slt_src
, st_src_reg_for_float(0.0));
1695 /* Use SNE 0 if integers are being used as boolean values. */
1696 emit(ir
, TGSI_OPCODE_SNE
, result_dst
, result_src
, st_src_reg_for_int(0));
1702 case ir_binop_logic_xor
:
1703 if (native_integers
)
1704 emit(ir
, TGSI_OPCODE_XOR
, result_dst
, op
[0], op
[1]);
1706 emit(ir
, TGSI_OPCODE_SNE
, result_dst
, op
[0], op
[1]);
1709 case ir_binop_logic_or
: {
1710 if (native_integers
) {
1711 /* If integers are used as booleans, we can use an actual "or"
1714 assert(native_integers
);
1715 emit(ir
, TGSI_OPCODE_OR
, result_dst
, op
[0], op
[1]);
1717 /* After the addition, the value will be an integer on the
1718 * range [0,2]. Zero stays zero, and positive values become 1.0.
1720 glsl_to_tgsi_instruction
*add
=
1721 emit(ir
, TGSI_OPCODE_ADD
, result_dst
, op
[0], op
[1]);
1722 if (this->prog
->Target
== GL_FRAGMENT_PROGRAM_ARB
) {
1723 /* The clamping to [0,1] can be done for free in the fragment
1724 * shader with a saturate if floats are being used as boolean values.
1726 add
->saturate
= true;
1728 /* Negating the result of the addition gives values on the range
1729 * [-2, 0]. Zero stays zero, and negative values become 1.0. This
1730 * is achieved using SLT.
1732 st_src_reg slt_src
= result_src
;
1733 slt_src
.negate
= ~slt_src
.negate
;
1734 emit(ir
, TGSI_OPCODE_SLT
, result_dst
, slt_src
, st_src_reg_for_float(0.0));
1740 case ir_binop_logic_and
:
1741 /* If native integers are disabled, the bool args are stored as float 0.0
1742 * or 1.0, so "mul" gives us "and". If they're enabled, just use the
1743 * actual AND opcode.
1745 if (native_integers
)
1746 emit(ir
, TGSI_OPCODE_AND
, result_dst
, op
[0], op
[1]);
1748 emit(ir
, TGSI_OPCODE_MUL
, result_dst
, op
[0], op
[1]);
1752 assert(ir
->operands
[0]->type
->is_vector());
1753 assert(ir
->operands
[0]->type
== ir
->operands
[1]->type
);
1754 emit_dp(ir
, result_dst
, op
[0], op
[1],
1755 ir
->operands
[0]->type
->vector_elements
);
1760 emit_scalar(ir
, TGSI_OPCODE_SQRT
, result_dst
, op
[0]);
1762 /* sqrt(x) = x * rsq(x). */
1763 emit_scalar(ir
, TGSI_OPCODE_RSQ
, result_dst
, op
[0]);
1764 emit(ir
, TGSI_OPCODE_MUL
, result_dst
, result_src
, op
[0]);
1765 /* For incoming channels <= 0, set the result to 0. */
1766 op
[0].negate
= ~op
[0].negate
;
1767 emit(ir
, TGSI_OPCODE_CMP
, result_dst
,
1768 op
[0], result_src
, st_src_reg_for_float(0.0));
1772 emit_scalar(ir
, TGSI_OPCODE_RSQ
, result_dst
, op
[0]);
1775 if (native_integers
) {
1776 emit(ir
, TGSI_OPCODE_I2F
, result_dst
, op
[0]);
1779 /* fallthrough to next case otherwise */
1781 if (native_integers
) {
1782 emit(ir
, TGSI_OPCODE_AND
, result_dst
, op
[0], st_src_reg_for_float(1.0));
1785 /* fallthrough to next case otherwise */
1788 /* Converting between signed and unsigned integers is a no-op. */
1792 if (native_integers
) {
1793 /* Booleans are stored as integers using ~0 for true and 0 for false.
1794 * GLSL requires that int(bool) return 1 for true and 0 for false.
1795 * This conversion is done with AND, but it could be done with NEG.
1797 emit(ir
, TGSI_OPCODE_AND
, result_dst
, op
[0], st_src_reg_for_int(1));
1799 /* Booleans and integers are both stored as floats when native
1800 * integers are disabled.
1806 if (native_integers
)
1807 emit(ir
, TGSI_OPCODE_F2I
, result_dst
, op
[0]);
1809 emit(ir
, TGSI_OPCODE_TRUNC
, result_dst
, op
[0]);
1812 if (native_integers
)
1813 emit(ir
, TGSI_OPCODE_F2U
, result_dst
, op
[0]);
1815 emit(ir
, TGSI_OPCODE_TRUNC
, result_dst
, op
[0]);
1817 case ir_unop_bitcast_f2i
:
1819 result_src
.type
= GLSL_TYPE_INT
;
1821 case ir_unop_bitcast_f2u
:
1823 result_src
.type
= GLSL_TYPE_UINT
;
1825 case ir_unop_bitcast_i2f
:
1826 case ir_unop_bitcast_u2f
:
1828 result_src
.type
= GLSL_TYPE_FLOAT
;
1831 emit(ir
, TGSI_OPCODE_SNE
, result_dst
, op
[0], st_src_reg_for_float(0.0));
1834 if (native_integers
)
1835 emit(ir
, TGSI_OPCODE_INEG
, result_dst
, op
[0]);
1837 emit(ir
, TGSI_OPCODE_SNE
, result_dst
, op
[0], st_src_reg_for_float(0.0));
1840 emit(ir
, TGSI_OPCODE_TRUNC
, result_dst
, op
[0]);
1843 emit(ir
, TGSI_OPCODE_CEIL
, result_dst
, op
[0]);
1846 emit(ir
, TGSI_OPCODE_FLR
, result_dst
, op
[0]);
1848 case ir_unop_round_even
:
1849 emit(ir
, TGSI_OPCODE_ROUND
, result_dst
, op
[0]);
1852 emit(ir
, TGSI_OPCODE_FRC
, result_dst
, op
[0]);
1856 emit(ir
, TGSI_OPCODE_MIN
, result_dst
, op
[0], op
[1]);
1859 emit(ir
, TGSI_OPCODE_MAX
, result_dst
, op
[0], op
[1]);
1862 emit_scalar(ir
, TGSI_OPCODE_POW
, result_dst
, op
[0], op
[1]);
1865 case ir_unop_bit_not
:
1866 if (native_integers
) {
1867 emit(ir
, TGSI_OPCODE_NOT
, result_dst
, op
[0]);
1871 if (native_integers
) {
1872 emit(ir
, TGSI_OPCODE_U2F
, result_dst
, op
[0]);
1875 case ir_binop_lshift
:
1876 if (native_integers
) {
1877 emit(ir
, TGSI_OPCODE_SHL
, result_dst
, op
[0], op
[1]);
1880 case ir_binop_rshift
:
1881 if (native_integers
) {
1882 emit(ir
, TGSI_OPCODE_ISHR
, result_dst
, op
[0], op
[1]);
1885 case ir_binop_bit_and
:
1886 if (native_integers
) {
1887 emit(ir
, TGSI_OPCODE_AND
, result_dst
, op
[0], op
[1]);
1890 case ir_binop_bit_xor
:
1891 if (native_integers
) {
1892 emit(ir
, TGSI_OPCODE_XOR
, result_dst
, op
[0], op
[1]);
1895 case ir_binop_bit_or
:
1896 if (native_integers
) {
1897 emit(ir
, TGSI_OPCODE_OR
, result_dst
, op
[0], op
[1]);
1901 assert(!"GLSL 1.30 features unsupported");
1904 case ir_binop_ubo_load
: {
1905 ir_constant
*const_uniform_block
= ir
->operands
[0]->as_constant();
1906 ir_constant
*const_offset_ir
= ir
->operands
[1]->as_constant();
1907 unsigned const_offset
= const_offset_ir
? const_offset_ir
->value
.u
[0] : 0;
1908 unsigned const_block
= const_uniform_block
? const_uniform_block
->value
.u
[0] + 1 : 0;
1909 st_src_reg index_reg
= get_temp(glsl_type::uint_type
);
1912 cbuf
.type
= glsl_type::vec4_type
->base_type
;
1913 cbuf
.file
= PROGRAM_CONSTANT
;
1915 cbuf
.reladdr
= NULL
;
1918 assert(ir
->type
->is_vector() || ir
->type
->is_scalar());
1920 if (const_offset_ir
) {
1921 /* Constant index into constant buffer */
1922 cbuf
.reladdr
= NULL
;
1923 cbuf
.index
= const_offset
/ 16;
1926 /* Relative/variable index into constant buffer */
1927 emit(ir
, TGSI_OPCODE_USHR
, st_dst_reg(index_reg
), op
[1],
1928 st_src_reg_for_int(4));
1929 cbuf
.reladdr
= ralloc(mem_ctx
, st_src_reg
);
1930 memcpy(cbuf
.reladdr
, &index_reg
, sizeof(index_reg
));
1933 if (const_uniform_block
) {
1934 /* Constant constant buffer */
1935 cbuf
.reladdr2
= NULL
;
1936 cbuf
.index2D
= const_block
;
1937 cbuf
.has_index2
= true;
1940 /* Relative/variable constant buffer */
1941 cbuf
.reladdr2
= ralloc(mem_ctx
, st_src_reg
);
1943 memcpy(cbuf
.reladdr2
, &op
[0], sizeof(st_src_reg
));
1944 cbuf
.has_index2
= true;
1947 cbuf
.swizzle
= swizzle_for_size(ir
->type
->vector_elements
);
1948 cbuf
.swizzle
+= MAKE_SWIZZLE4(const_offset
% 16 / 4,
1949 const_offset
% 16 / 4,
1950 const_offset
% 16 / 4,
1951 const_offset
% 16 / 4);
1953 if (ir
->type
->base_type
== GLSL_TYPE_BOOL
) {
1954 emit(ir
, TGSI_OPCODE_USNE
, result_dst
, cbuf
, st_src_reg_for_int(0));
1956 emit(ir
, TGSI_OPCODE_MOV
, result_dst
, cbuf
);
1961 /* note: we have to reorder the three args here */
1962 emit(ir
, TGSI_OPCODE_LRP
, result_dst
, op
[2], op
[1], op
[0]);
1965 if (this->ctx
->Const
.NativeIntegers
)
1966 emit(ir
, TGSI_OPCODE_UCMP
, result_dst
, op
[0], op
[1], op
[2]);
1968 op
[0].negate
= ~op
[0].negate
;
1969 emit(ir
, TGSI_OPCODE_CMP
, result_dst
, op
[0], op
[1], op
[2]);
1972 case ir_triop_bitfield_extract
:
1973 emit(ir
, TGSI_OPCODE_IBFE
, result_dst
, op
[0], op
[1], op
[2]);
1975 case ir_quadop_bitfield_insert
:
1976 emit(ir
, TGSI_OPCODE_BFI
, result_dst
, op
[0], op
[1], op
[2], op
[3]);
1978 case ir_unop_bitfield_reverse
:
1979 emit(ir
, TGSI_OPCODE_BREV
, result_dst
, op
[0]);
1981 case ir_unop_bit_count
:
1982 emit(ir
, TGSI_OPCODE_POPC
, result_dst
, op
[0]);
1984 case ir_unop_find_msb
:
1985 emit(ir
, TGSI_OPCODE_IMSB
, result_dst
, op
[0]);
1987 case ir_unop_find_lsb
:
1988 emit(ir
, TGSI_OPCODE_LSB
, result_dst
, op
[0]);
1990 case ir_binop_imul_high
:
1991 emit(ir
, TGSI_OPCODE_IMUL_HI
, result_dst
, op
[0], op
[1]);
1994 /* NOTE: Perhaps there should be a special opcode that enforces fused
1995 * mul-add. Just use MAD for now.
1997 emit(ir
, TGSI_OPCODE_MAD
, result_dst
, op
[0], op
[1], op
[2]);
1999 case ir_unop_interpolate_at_centroid
:
2000 emit(ir
, TGSI_OPCODE_INTERP_CENTROID
, result_dst
, op
[0]);
2002 case ir_binop_interpolate_at_offset
:
2003 emit(ir
, TGSI_OPCODE_INTERP_OFFSET
, result_dst
, op
[0], op
[1]);
2005 case ir_binop_interpolate_at_sample
:
2006 emit(ir
, TGSI_OPCODE_INTERP_SAMPLE
, result_dst
, op
[0], op
[1]);
2008 case ir_unop_pack_snorm_2x16
:
2009 case ir_unop_pack_unorm_2x16
:
2010 case ir_unop_pack_half_2x16
:
2011 case ir_unop_pack_snorm_4x8
:
2012 case ir_unop_pack_unorm_4x8
:
2013 case ir_unop_unpack_snorm_2x16
:
2014 case ir_unop_unpack_unorm_2x16
:
2015 case ir_unop_unpack_half_2x16
:
2016 case ir_unop_unpack_half_2x16_split_x
:
2017 case ir_unop_unpack_half_2x16_split_y
:
2018 case ir_unop_unpack_snorm_4x8
:
2019 case ir_unop_unpack_unorm_4x8
:
2020 case ir_binop_pack_half_2x16_split
:
2023 case ir_quadop_vector
:
2024 case ir_binop_vector_extract
:
2025 case ir_triop_vector_insert
:
2026 case ir_binop_ldexp
:
2027 case ir_binop_carry
:
2028 case ir_binop_borrow
:
2036 case ir_unop_pack_double_2x32
:
2037 case ir_unop_unpack_double_2x32
:
2038 case ir_unop_frexp_sig
:
2039 case ir_unop_frexp_exp
:
2040 /* This operation is not supported, or should have already been handled.
2042 assert(!"Invalid ir opcode in glsl_to_tgsi_visitor::visit()");
2046 this->result
= result_src
;
2051 glsl_to_tgsi_visitor::visit(ir_swizzle
*ir
)
2057 /* Note that this is only swizzles in expressions, not those on the left
2058 * hand side of an assignment, which do write masking. See ir_assignment
2062 ir
->val
->accept(this);
2064 assert(src
.file
!= PROGRAM_UNDEFINED
);
2065 assert(ir
->type
->vector_elements
> 0);
2067 for (i
= 0; i
< 4; i
++) {
2068 if (i
< ir
->type
->vector_elements
) {
2071 swizzle
[i
] = GET_SWZ(src
.swizzle
, ir
->mask
.x
);
2074 swizzle
[i
] = GET_SWZ(src
.swizzle
, ir
->mask
.y
);
2077 swizzle
[i
] = GET_SWZ(src
.swizzle
, ir
->mask
.z
);
2080 swizzle
[i
] = GET_SWZ(src
.swizzle
, ir
->mask
.w
);
2084 /* If the type is smaller than a vec4, replicate the last
2087 swizzle
[i
] = swizzle
[ir
->type
->vector_elements
- 1];
2091 src
.swizzle
= MAKE_SWIZZLE4(swizzle
[0], swizzle
[1], swizzle
[2], swizzle
[3]);
2097 glsl_to_tgsi_visitor::visit(ir_dereference_variable
*ir
)
2099 variable_storage
*entry
= find_variable_storage(ir
->var
);
2100 ir_variable
*var
= ir
->var
;
2103 switch (var
->data
.mode
) {
2104 case ir_var_uniform
:
2105 entry
= new(mem_ctx
) variable_storage(var
, PROGRAM_UNIFORM
,
2106 var
->data
.location
);
2107 this->variables
.push_tail(entry
);
2109 case ir_var_shader_in
:
2110 /* The linker assigns locations for varyings and attributes,
2111 * including deprecated builtins (like gl_Color), user-assign
2112 * generic attributes (glBindVertexLocation), and
2113 * user-defined varyings.
2115 assert(var
->data
.location
!= -1);
2116 entry
= new(mem_ctx
) variable_storage(var
,
2118 var
->data
.location
);
2120 case ir_var_shader_out
:
2121 assert(var
->data
.location
!= -1);
2122 entry
= new(mem_ctx
) variable_storage(var
,
2127 case ir_var_system_value
:
2128 entry
= new(mem_ctx
) variable_storage(var
,
2129 PROGRAM_SYSTEM_VALUE
,
2130 var
->data
.location
);
2133 case ir_var_temporary
:
2134 st_src_reg src
= get_temp(var
->type
);
2136 entry
= new(mem_ctx
) variable_storage(var
, src
.file
, src
.index
);
2137 this->variables
.push_tail(entry
);
2143 printf("Failed to make storage for %s\n", var
->name
);
2148 this->result
= st_src_reg(entry
->file
, entry
->index
, var
->type
);
2149 if (!native_integers
)
2150 this->result
.type
= GLSL_TYPE_FLOAT
;
2154 glsl_to_tgsi_visitor::visit(ir_dereference_array
*ir
)
2158 int element_size
= type_size(ir
->type
);
2161 index
= ir
->array_index
->constant_expression_value();
2163 ir
->array
->accept(this);
2166 is_2D_input
= this->prog
->Target
== GL_GEOMETRY_PROGRAM_NV
&&
2167 src
.file
== PROGRAM_INPUT
&&
2168 ir
->array
->ir_type
!= ir_type_dereference_array
;
2175 src
.index2D
= index
->value
.i
[0];
2176 src
.has_index2
= true;
2178 src
.index
+= index
->value
.i
[0] * element_size
;
2180 /* Variable index array dereference. It eats the "vec4" of the
2181 * base of the array and an index that offsets the TGSI register
2184 ir
->array_index
->accept(this);
2186 st_src_reg index_reg
;
2188 if (element_size
== 1) {
2189 index_reg
= this->result
;
2191 index_reg
= get_temp(native_integers
?
2192 glsl_type::int_type
: glsl_type::float_type
);
2194 emit(ir
, TGSI_OPCODE_MUL
, st_dst_reg(index_reg
),
2195 this->result
, st_src_reg_for_type(index_reg
.type
, element_size
));
2198 /* If there was already a relative address register involved, add the
2199 * new and the old together to get the new offset.
2201 if (!is_2D_input
&& src
.reladdr
!= NULL
) {
2202 st_src_reg accum_reg
= get_temp(native_integers
?
2203 glsl_type::int_type
: glsl_type::float_type
);
2205 emit(ir
, TGSI_OPCODE_ADD
, st_dst_reg(accum_reg
),
2206 index_reg
, *src
.reladdr
);
2208 index_reg
= accum_reg
;
2212 src
.reladdr2
= ralloc(mem_ctx
, st_src_reg
);
2213 memcpy(src
.reladdr2
, &index_reg
, sizeof(index_reg
));
2215 src
.has_index2
= true;
2217 src
.reladdr
= ralloc(mem_ctx
, st_src_reg
);
2218 memcpy(src
.reladdr
, &index_reg
, sizeof(index_reg
));
2222 /* If the type is smaller than a vec4, replicate the last channel out. */
2223 if (ir
->type
->is_scalar() || ir
->type
->is_vector())
2224 src
.swizzle
= swizzle_for_size(ir
->type
->vector_elements
);
2226 src
.swizzle
= SWIZZLE_NOOP
;
2228 /* Change the register type to the element type of the array. */
2229 src
.type
= ir
->type
->base_type
;
2235 glsl_to_tgsi_visitor::visit(ir_dereference_record
*ir
)
2238 const glsl_type
*struct_type
= ir
->record
->type
;
2241 ir
->record
->accept(this);
2243 for (i
= 0; i
< struct_type
->length
; i
++) {
2244 if (strcmp(struct_type
->fields
.structure
[i
].name
, ir
->field
) == 0)
2246 offset
+= type_size(struct_type
->fields
.structure
[i
].type
);
2249 /* If the type is smaller than a vec4, replicate the last channel out. */
2250 if (ir
->type
->is_scalar() || ir
->type
->is_vector())
2251 this->result
.swizzle
= swizzle_for_size(ir
->type
->vector_elements
);
2253 this->result
.swizzle
= SWIZZLE_NOOP
;
2255 this->result
.index
+= offset
;
2256 this->result
.type
= ir
->type
->base_type
;
2260 * We want to be careful in assignment setup to hit the actual storage
2261 * instead of potentially using a temporary like we might with the
2262 * ir_dereference handler.
2265 get_assignment_lhs(ir_dereference
*ir
, glsl_to_tgsi_visitor
*v
)
2267 /* The LHS must be a dereference. If the LHS is a variable indexed array
2268 * access of a vector, it must be separated into a series conditional moves
2269 * before reaching this point (see ir_vec_index_to_cond_assign).
2271 assert(ir
->as_dereference());
2272 ir_dereference_array
*deref_array
= ir
->as_dereference_array();
2274 assert(!deref_array
->array
->type
->is_vector());
2277 /* Use the rvalue deref handler for the most part. We'll ignore
2278 * swizzles in it and write swizzles using writemask, though.
2281 return st_dst_reg(v
->result
);
2285 * Process the condition of a conditional assignment
2287 * Examines the condition of a conditional assignment to generate the optimal
2288 * first operand of a \c CMP instruction. If the condition is a relational
2289 * operator with 0 (e.g., \c ir_binop_less), the value being compared will be
2290 * used as the source for the \c CMP instruction. Otherwise the comparison
2291 * is processed to a boolean result, and the boolean result is used as the
2292 * operand to the CMP instruction.
2295 glsl_to_tgsi_visitor::process_move_condition(ir_rvalue
*ir
)
2297 ir_rvalue
*src_ir
= ir
;
2299 bool switch_order
= false;
2301 ir_expression
*const expr
= ir
->as_expression();
2303 if (native_integers
) {
2304 if ((expr
!= NULL
) && (expr
->get_num_operands() == 2)) {
2305 enum glsl_base_type type
= expr
->operands
[0]->type
->base_type
;
2306 if (type
== GLSL_TYPE_INT
|| type
== GLSL_TYPE_UINT
||
2307 type
== GLSL_TYPE_BOOL
) {
2308 if (expr
->operation
== ir_binop_equal
) {
2309 if (expr
->operands
[0]->is_zero()) {
2310 src_ir
= expr
->operands
[1];
2311 switch_order
= true;
2313 else if (expr
->operands
[1]->is_zero()) {
2314 src_ir
= expr
->operands
[0];
2315 switch_order
= true;
2318 else if (expr
->operation
== ir_binop_nequal
) {
2319 if (expr
->operands
[0]->is_zero()) {
2320 src_ir
= expr
->operands
[1];
2322 else if (expr
->operands
[1]->is_zero()) {
2323 src_ir
= expr
->operands
[0];
2329 src_ir
->accept(this);
2330 return switch_order
;
2333 if ((expr
!= NULL
) && (expr
->get_num_operands() == 2)) {
2334 bool zero_on_left
= false;
2336 if (expr
->operands
[0]->is_zero()) {
2337 src_ir
= expr
->operands
[1];
2338 zero_on_left
= true;
2339 } else if (expr
->operands
[1]->is_zero()) {
2340 src_ir
= expr
->operands
[0];
2341 zero_on_left
= false;
2345 * (a < 0) T F F ( a < 0) T F F
2346 * (0 < a) F F T (-a < 0) F F T
2347 * (a <= 0) T T F (-a < 0) F F T (swap order of other operands)
2348 * (0 <= a) F T T ( a < 0) T F F (swap order of other operands)
2349 * (a > 0) F F T (-a < 0) F F T
2350 * (0 > a) T F F ( a < 0) T F F
2351 * (a >= 0) F T T ( a < 0) T F F (swap order of other operands)
2352 * (0 >= a) T T F (-a < 0) F F T (swap order of other operands)
2354 * Note that exchanging the order of 0 and 'a' in the comparison simply
2355 * means that the value of 'a' should be negated.
2358 switch (expr
->operation
) {
2360 switch_order
= false;
2361 negate
= zero_on_left
;
2364 case ir_binop_greater
:
2365 switch_order
= false;
2366 negate
= !zero_on_left
;
2369 case ir_binop_lequal
:
2370 switch_order
= true;
2371 negate
= !zero_on_left
;
2374 case ir_binop_gequal
:
2375 switch_order
= true;
2376 negate
= zero_on_left
;
2380 /* This isn't the right kind of comparison afterall, so make sure
2381 * the whole condition is visited.
2389 src_ir
->accept(this);
2391 /* We use the TGSI_OPCODE_CMP (a < 0 ? b : c) for conditional moves, and the
2392 * condition we produced is 0.0 or 1.0. By flipping the sign, we can
2393 * choose which value TGSI_OPCODE_CMP produces without an extra instruction
2394 * computing the condition.
2397 this->result
.negate
= ~this->result
.negate
;
2399 return switch_order
;
2403 glsl_to_tgsi_visitor::emit_block_mov(ir_assignment
*ir
, const struct glsl_type
*type
,
2404 st_dst_reg
*l
, st_src_reg
*r
,
2405 st_src_reg
*cond
, bool cond_swap
)
2407 if (type
->base_type
== GLSL_TYPE_STRUCT
) {
2408 for (unsigned int i
= 0; i
< type
->length
; i
++) {
2409 emit_block_mov(ir
, type
->fields
.structure
[i
].type
, l
, r
,
2415 if (type
->is_array()) {
2416 for (unsigned int i
= 0; i
< type
->length
; i
++) {
2417 emit_block_mov(ir
, type
->fields
.array
, l
, r
, cond
, cond_swap
);
2422 if (type
->is_matrix()) {
2423 const struct glsl_type
*vec_type
;
2425 vec_type
= glsl_type::get_instance(GLSL_TYPE_FLOAT
,
2426 type
->vector_elements
, 1);
2428 for (int i
= 0; i
< type
->matrix_columns
; i
++) {
2429 emit_block_mov(ir
, vec_type
, l
, r
, cond
, cond_swap
);
2434 assert(type
->is_scalar() || type
->is_vector());
2436 r
->type
= type
->base_type
;
2438 st_src_reg l_src
= st_src_reg(*l
);
2439 l_src
.swizzle
= swizzle_for_size(type
->vector_elements
);
2441 if (native_integers
) {
2442 emit(ir
, TGSI_OPCODE_UCMP
, *l
, *cond
,
2443 cond_swap
? l_src
: *r
,
2444 cond_swap
? *r
: l_src
);
2446 emit(ir
, TGSI_OPCODE_CMP
, *l
, *cond
,
2447 cond_swap
? l_src
: *r
,
2448 cond_swap
? *r
: l_src
);
2451 emit(ir
, TGSI_OPCODE_MOV
, *l
, *r
);
2458 glsl_to_tgsi_visitor::visit(ir_assignment
*ir
)
2463 ir
->rhs
->accept(this);
2466 l
= get_assignment_lhs(ir
->lhs
, this);
2468 /* FINISHME: This should really set to the correct maximal writemask for each
2469 * FINISHME: component written (in the loops below). This case can only
2470 * FINISHME: occur for matrices, arrays, and structures.
2472 if (ir
->write_mask
== 0) {
2473 assert(!ir
->lhs
->type
->is_scalar() && !ir
->lhs
->type
->is_vector());
2474 l
.writemask
= WRITEMASK_XYZW
;
2475 } else if (ir
->lhs
->type
->is_scalar() &&
2476 ir
->lhs
->variable_referenced()->data
.mode
== ir_var_shader_out
) {
2477 /* FINISHME: This hack makes writing to gl_FragDepth, which lives in the
2478 * FINISHME: W component of fragment shader output zero, work correctly.
2480 l
.writemask
= WRITEMASK_XYZW
;
2483 int first_enabled_chan
= 0;
2486 l
.writemask
= ir
->write_mask
;
2488 for (int i
= 0; i
< 4; i
++) {
2489 if (l
.writemask
& (1 << i
)) {
2490 first_enabled_chan
= GET_SWZ(r
.swizzle
, i
);
2495 /* Swizzle a small RHS vector into the channels being written.
2497 * glsl ir treats write_mask as dictating how many channels are
2498 * present on the RHS while TGSI treats write_mask as just
2499 * showing which channels of the vec4 RHS get written.
2501 for (int i
= 0; i
< 4; i
++) {
2502 if (l
.writemask
& (1 << i
))
2503 swizzles
[i
] = GET_SWZ(r
.swizzle
, rhs_chan
++);
2505 swizzles
[i
] = first_enabled_chan
;
2507 r
.swizzle
= MAKE_SWIZZLE4(swizzles
[0], swizzles
[1],
2508 swizzles
[2], swizzles
[3]);
2511 assert(l
.file
!= PROGRAM_UNDEFINED
);
2512 assert(r
.file
!= PROGRAM_UNDEFINED
);
2514 if (ir
->condition
) {
2515 const bool switch_order
= this->process_move_condition(ir
->condition
);
2516 st_src_reg condition
= this->result
;
2518 emit_block_mov(ir
, ir
->lhs
->type
, &l
, &r
, &condition
, switch_order
);
2519 } else if (ir
->rhs
->as_expression() &&
2520 this->instructions
.get_tail() &&
2521 ir
->rhs
== ((glsl_to_tgsi_instruction
*)this->instructions
.get_tail())->ir
&&
2522 type_size(ir
->lhs
->type
) == 1 &&
2523 l
.writemask
== ((glsl_to_tgsi_instruction
*)this->instructions
.get_tail())->dst
.writemask
) {
2524 /* To avoid emitting an extra MOV when assigning an expression to a
2525 * variable, emit the last instruction of the expression again, but
2526 * replace the destination register with the target of the assignment.
2527 * Dead code elimination will remove the original instruction.
2529 glsl_to_tgsi_instruction
*inst
, *new_inst
;
2530 inst
= (glsl_to_tgsi_instruction
*)this->instructions
.get_tail();
2531 new_inst
= emit(ir
, inst
->op
, l
, inst
->src
[0], inst
->src
[1], inst
->src
[2]);
2532 new_inst
->saturate
= inst
->saturate
;
2533 inst
->dead_mask
= inst
->dst
.writemask
;
2535 emit_block_mov(ir
, ir
->rhs
->type
, &l
, &r
, NULL
, false);
2541 glsl_to_tgsi_visitor::visit(ir_constant
*ir
)
2544 GLfloat stack_vals
[4] = { 0 };
2545 gl_constant_value
*values
= (gl_constant_value
*) stack_vals
;
2546 GLenum gl_type
= GL_NONE
;
2548 static int in_array
= 0;
2549 gl_register_file file
= in_array
? PROGRAM_CONSTANT
: PROGRAM_IMMEDIATE
;
2551 /* Unfortunately, 4 floats is all we can get into
2552 * _mesa_add_typed_unnamed_constant. So, make a temp to store an
2553 * aggregate constant and move each constant value into it. If we
2554 * get lucky, copy propagation will eliminate the extra moves.
2556 if (ir
->type
->base_type
== GLSL_TYPE_STRUCT
) {
2557 st_src_reg temp_base
= get_temp(ir
->type
);
2558 st_dst_reg temp
= st_dst_reg(temp_base
);
2560 foreach_in_list(ir_constant
, field_value
, &ir
->components
) {
2561 int size
= type_size(field_value
->type
);
2565 field_value
->accept(this);
2568 for (i
= 0; i
< (unsigned int)size
; i
++) {
2569 emit(ir
, TGSI_OPCODE_MOV
, temp
, src
);
2575 this->result
= temp_base
;
2579 if (ir
->type
->is_array()) {
2580 st_src_reg temp_base
= get_temp(ir
->type
);
2581 st_dst_reg temp
= st_dst_reg(temp_base
);
2582 int size
= type_size(ir
->type
->fields
.array
);
2587 for (i
= 0; i
< ir
->type
->length
; i
++) {
2588 ir
->array_elements
[i
]->accept(this);
2590 for (int j
= 0; j
< size
; j
++) {
2591 emit(ir
, TGSI_OPCODE_MOV
, temp
, src
);
2597 this->result
= temp_base
;
2602 if (ir
->type
->is_matrix()) {
2603 st_src_reg mat
= get_temp(ir
->type
);
2604 st_dst_reg mat_column
= st_dst_reg(mat
);
2606 for (i
= 0; i
< ir
->type
->matrix_columns
; i
++) {
2607 assert(ir
->type
->base_type
== GLSL_TYPE_FLOAT
);
2608 values
= (gl_constant_value
*) &ir
->value
.f
[i
* ir
->type
->vector_elements
];
2610 src
= st_src_reg(file
, -1, ir
->type
->base_type
);
2611 src
.index
= add_constant(file
,
2613 ir
->type
->vector_elements
,
2616 emit(ir
, TGSI_OPCODE_MOV
, mat_column
, src
);
2625 switch (ir
->type
->base_type
) {
2626 case GLSL_TYPE_FLOAT
:
2628 for (i
= 0; i
< ir
->type
->vector_elements
; i
++) {
2629 values
[i
].f
= ir
->value
.f
[i
];
2632 case GLSL_TYPE_UINT
:
2633 gl_type
= native_integers
? GL_UNSIGNED_INT
: GL_FLOAT
;
2634 for (i
= 0; i
< ir
->type
->vector_elements
; i
++) {
2635 if (native_integers
)
2636 values
[i
].u
= ir
->value
.u
[i
];
2638 values
[i
].f
= ir
->value
.u
[i
];
2642 gl_type
= native_integers
? GL_INT
: GL_FLOAT
;
2643 for (i
= 0; i
< ir
->type
->vector_elements
; i
++) {
2644 if (native_integers
)
2645 values
[i
].i
= ir
->value
.i
[i
];
2647 values
[i
].f
= ir
->value
.i
[i
];
2650 case GLSL_TYPE_BOOL
:
2651 gl_type
= native_integers
? GL_BOOL
: GL_FLOAT
;
2652 for (i
= 0; i
< ir
->type
->vector_elements
; i
++) {
2653 values
[i
].u
= ir
->value
.b
[i
] ? ctx
->Const
.UniformBooleanTrue
: 0;
2657 assert(!"Non-float/uint/int/bool constant");
2660 this->result
= st_src_reg(file
, -1, ir
->type
);
2661 this->result
.index
= add_constant(file
,
2663 ir
->type
->vector_elements
,
2665 &this->result
.swizzle
);
2669 glsl_to_tgsi_visitor::get_function_signature(ir_function_signature
*sig
)
2671 foreach_in_list_use_after(function_entry
, entry
, &this->function_signatures
) {
2672 if (entry
->sig
== sig
)
2676 entry
= ralloc(mem_ctx
, function_entry
);
2678 entry
->sig_id
= this->next_signature_id
++;
2679 entry
->bgn_inst
= NULL
;
2681 /* Allocate storage for all the parameters. */
2682 foreach_in_list(ir_variable
, param
, &sig
->parameters
) {
2683 variable_storage
*storage
;
2685 storage
= find_variable_storage(param
);
2688 st_src_reg src
= get_temp(param
->type
);
2690 storage
= new(mem_ctx
) variable_storage(param
, src
.file
, src
.index
);
2691 this->variables
.push_tail(storage
);
2694 if (!sig
->return_type
->is_void()) {
2695 entry
->return_reg
= get_temp(sig
->return_type
);
2697 entry
->return_reg
= undef_src
;
2700 this->function_signatures
.push_tail(entry
);
2705 glsl_to_tgsi_visitor::visit(ir_call
*ir
)
2707 glsl_to_tgsi_instruction
*call_inst
;
2708 ir_function_signature
*sig
= ir
->callee
;
2709 function_entry
*entry
= get_function_signature(sig
);
2712 /* Process in parameters. */
2713 foreach_two_lists(formal_node
, &sig
->parameters
,
2714 actual_node
, &ir
->actual_parameters
) {
2715 ir_rvalue
*param_rval
= (ir_rvalue
*) actual_node
;
2716 ir_variable
*param
= (ir_variable
*) formal_node
;
2718 if (param
->data
.mode
== ir_var_function_in
||
2719 param
->data
.mode
== ir_var_function_inout
) {
2720 variable_storage
*storage
= find_variable_storage(param
);
2723 param_rval
->accept(this);
2724 st_src_reg r
= this->result
;
2727 l
.file
= storage
->file
;
2728 l
.index
= storage
->index
;
2730 l
.writemask
= WRITEMASK_XYZW
;
2731 l
.cond_mask
= COND_TR
;
2733 for (i
= 0; i
< type_size(param
->type
); i
++) {
2734 emit(ir
, TGSI_OPCODE_MOV
, l
, r
);
2741 /* Emit call instruction */
2742 call_inst
= emit(ir
, TGSI_OPCODE_CAL
);
2743 call_inst
->function
= entry
;
2745 /* Process out parameters. */
2746 foreach_two_lists(formal_node
, &sig
->parameters
,
2747 actual_node
, &ir
->actual_parameters
) {
2748 ir_rvalue
*param_rval
= (ir_rvalue
*) actual_node
;
2749 ir_variable
*param
= (ir_variable
*) formal_node
;
2751 if (param
->data
.mode
== ir_var_function_out
||
2752 param
->data
.mode
== ir_var_function_inout
) {
2753 variable_storage
*storage
= find_variable_storage(param
);
2757 r
.file
= storage
->file
;
2758 r
.index
= storage
->index
;
2760 r
.swizzle
= SWIZZLE_NOOP
;
2763 param_rval
->accept(this);
2764 st_dst_reg l
= st_dst_reg(this->result
);
2766 for (i
= 0; i
< type_size(param
->type
); i
++) {
2767 emit(ir
, TGSI_OPCODE_MOV
, l
, r
);
2774 /* Process return value. */
2775 this->result
= entry
->return_reg
;
2779 glsl_to_tgsi_visitor::visit(ir_texture
*ir
)
2781 st_src_reg result_src
, coord
, cube_sc
, lod_info
, projector
, dx
, dy
;
2782 st_src_reg offset
[MAX_GLSL_TEXTURE_OFFSET
], sample_index
, component
;
2783 st_src_reg levels_src
;
2784 st_dst_reg result_dst
, coord_dst
, cube_sc_dst
;
2785 glsl_to_tgsi_instruction
*inst
= NULL
;
2786 unsigned opcode
= TGSI_OPCODE_NOP
;
2787 const glsl_type
*sampler_type
= ir
->sampler
->type
;
2788 ir_rvalue
*sampler_index
=
2789 _mesa_get_sampler_array_nonconst_index(ir
->sampler
);
2790 bool is_cube_array
= false;
2793 /* if we are a cube array sampler */
2794 if ((sampler_type
->sampler_dimensionality
== GLSL_SAMPLER_DIM_CUBE
&&
2795 sampler_type
->sampler_array
)) {
2796 is_cube_array
= true;
2799 if (ir
->coordinate
) {
2800 ir
->coordinate
->accept(this);
2802 /* Put our coords in a temp. We'll need to modify them for shadow,
2803 * projection, or LOD, so the only case we'd use it as is is if
2804 * we're doing plain old texturing. The optimization passes on
2805 * glsl_to_tgsi_visitor should handle cleaning up our mess in that case.
2807 coord
= get_temp(glsl_type::vec4_type
);
2808 coord_dst
= st_dst_reg(coord
);
2809 coord_dst
.writemask
= (1 << ir
->coordinate
->type
->vector_elements
) - 1;
2810 emit(ir
, TGSI_OPCODE_MOV
, coord_dst
, this->result
);
2813 if (ir
->projector
) {
2814 ir
->projector
->accept(this);
2815 projector
= this->result
;
2818 /* Storage for our result. Ideally for an assignment we'd be using
2819 * the actual storage for the result here, instead.
2821 result_src
= get_temp(ir
->type
);
2822 result_dst
= st_dst_reg(result_src
);
2826 opcode
= (is_cube_array
&& ir
->shadow_comparitor
) ? TGSI_OPCODE_TEX2
: TGSI_OPCODE_TEX
;
2828 ir
->offset
->accept(this);
2829 offset
[0] = this->result
;
2833 if (is_cube_array
||
2834 sampler_type
== glsl_type::samplerCubeShadow_type
) {
2835 opcode
= TGSI_OPCODE_TXB2
;
2838 opcode
= TGSI_OPCODE_TXB
;
2840 ir
->lod_info
.bias
->accept(this);
2841 lod_info
= this->result
;
2843 ir
->offset
->accept(this);
2844 offset
[0] = this->result
;
2848 opcode
= is_cube_array
? TGSI_OPCODE_TXL2
: TGSI_OPCODE_TXL
;
2849 ir
->lod_info
.lod
->accept(this);
2850 lod_info
= this->result
;
2852 ir
->offset
->accept(this);
2853 offset
[0] = this->result
;
2857 opcode
= TGSI_OPCODE_TXD
;
2858 ir
->lod_info
.grad
.dPdx
->accept(this);
2860 ir
->lod_info
.grad
.dPdy
->accept(this);
2863 ir
->offset
->accept(this);
2864 offset
[0] = this->result
;
2868 opcode
= TGSI_OPCODE_TXQ
;
2869 ir
->lod_info
.lod
->accept(this);
2870 lod_info
= this->result
;
2872 case ir_query_levels
:
2873 opcode
= TGSI_OPCODE_TXQ
;
2874 lod_info
= st_src_reg(PROGRAM_IMMEDIATE
, 0, GLSL_TYPE_INT
);
2875 levels_src
= get_temp(ir
->type
);
2878 opcode
= TGSI_OPCODE_TXF
;
2879 ir
->lod_info
.lod
->accept(this);
2880 lod_info
= this->result
;
2882 ir
->offset
->accept(this);
2883 offset
[0] = this->result
;
2887 opcode
= TGSI_OPCODE_TXF
;
2888 ir
->lod_info
.sample_index
->accept(this);
2889 sample_index
= this->result
;
2892 opcode
= TGSI_OPCODE_TG4
;
2893 ir
->lod_info
.component
->accept(this);
2894 component
= this->result
;
2896 ir
->offset
->accept(this);
2897 if (ir
->offset
->type
->base_type
== GLSL_TYPE_ARRAY
) {
2898 const glsl_type
*elt_type
= ir
->offset
->type
->fields
.array
;
2899 for (i
= 0; i
< ir
->offset
->type
->length
; i
++) {
2900 offset
[i
] = this->result
;
2901 offset
[i
].index
+= i
* type_size(elt_type
);
2902 offset
[i
].type
= elt_type
->base_type
;
2903 offset
[i
].swizzle
= swizzle_for_size(elt_type
->vector_elements
);
2906 offset
[0] = this->result
;
2911 opcode
= TGSI_OPCODE_LODQ
;
2915 if (ir
->projector
) {
2916 if (opcode
== TGSI_OPCODE_TEX
) {
2917 /* Slot the projector in as the last component of the coord. */
2918 coord_dst
.writemask
= WRITEMASK_W
;
2919 emit(ir
, TGSI_OPCODE_MOV
, coord_dst
, projector
);
2920 coord_dst
.writemask
= WRITEMASK_XYZW
;
2921 opcode
= TGSI_OPCODE_TXP
;
2923 st_src_reg coord_w
= coord
;
2924 coord_w
.swizzle
= SWIZZLE_WWWW
;
2926 /* For the other TEX opcodes there's no projective version
2927 * since the last slot is taken up by LOD info. Do the
2928 * projective divide now.
2930 coord_dst
.writemask
= WRITEMASK_W
;
2931 emit(ir
, TGSI_OPCODE_RCP
, coord_dst
, projector
);
2933 /* In the case where we have to project the coordinates "by hand,"
2934 * the shadow comparator value must also be projected.
2936 st_src_reg tmp_src
= coord
;
2937 if (ir
->shadow_comparitor
) {
2938 /* Slot the shadow value in as the second to last component of the
2941 ir
->shadow_comparitor
->accept(this);
2943 tmp_src
= get_temp(glsl_type::vec4_type
);
2944 st_dst_reg tmp_dst
= st_dst_reg(tmp_src
);
2946 /* Projective division not allowed for array samplers. */
2947 assert(!sampler_type
->sampler_array
);
2949 tmp_dst
.writemask
= WRITEMASK_Z
;
2950 emit(ir
, TGSI_OPCODE_MOV
, tmp_dst
, this->result
);
2952 tmp_dst
.writemask
= WRITEMASK_XY
;
2953 emit(ir
, TGSI_OPCODE_MOV
, tmp_dst
, coord
);
2956 coord_dst
.writemask
= WRITEMASK_XYZ
;
2957 emit(ir
, TGSI_OPCODE_MUL
, coord_dst
, tmp_src
, coord_w
);
2959 coord_dst
.writemask
= WRITEMASK_XYZW
;
2960 coord
.swizzle
= SWIZZLE_XYZW
;
2964 /* If projection is done and the opcode is not TGSI_OPCODE_TXP, then the shadow
2965 * comparator was put in the correct place (and projected) by the code,
2966 * above, that handles by-hand projection.
2968 if (ir
->shadow_comparitor
&& (!ir
->projector
|| opcode
== TGSI_OPCODE_TXP
)) {
2969 /* Slot the shadow value in as the second to last component of the
2972 ir
->shadow_comparitor
->accept(this);
2974 if (is_cube_array
) {
2975 cube_sc
= get_temp(glsl_type::float_type
);
2976 cube_sc_dst
= st_dst_reg(cube_sc
);
2977 cube_sc_dst
.writemask
= WRITEMASK_X
;
2978 emit(ir
, TGSI_OPCODE_MOV
, cube_sc_dst
, this->result
);
2979 cube_sc_dst
.writemask
= WRITEMASK_X
;
2982 if ((sampler_type
->sampler_dimensionality
== GLSL_SAMPLER_DIM_2D
&&
2983 sampler_type
->sampler_array
) ||
2984 sampler_type
->sampler_dimensionality
== GLSL_SAMPLER_DIM_CUBE
) {
2985 coord_dst
.writemask
= WRITEMASK_W
;
2987 coord_dst
.writemask
= WRITEMASK_Z
;
2989 emit(ir
, TGSI_OPCODE_MOV
, coord_dst
, this->result
);
2990 coord_dst
.writemask
= WRITEMASK_XYZW
;
2994 if (ir
->op
== ir_txf_ms
) {
2995 coord_dst
.writemask
= WRITEMASK_W
;
2996 emit(ir
, TGSI_OPCODE_MOV
, coord_dst
, sample_index
);
2997 coord_dst
.writemask
= WRITEMASK_XYZW
;
2998 } else if (opcode
== TGSI_OPCODE_TXL
|| opcode
== TGSI_OPCODE_TXB
||
2999 opcode
== TGSI_OPCODE_TXF
) {
3000 /* TGSI stores LOD or LOD bias in the last channel of the coords. */
3001 coord_dst
.writemask
= WRITEMASK_W
;
3002 emit(ir
, TGSI_OPCODE_MOV
, coord_dst
, lod_info
);
3003 coord_dst
.writemask
= WRITEMASK_XYZW
;
3006 if (sampler_index
) {
3007 sampler_index
->accept(this);
3008 emit_arl(ir
, sampler_reladdr
, this->result
);
3011 if (opcode
== TGSI_OPCODE_TXD
)
3012 inst
= emit(ir
, opcode
, result_dst
, coord
, dx
, dy
);
3013 else if (opcode
== TGSI_OPCODE_TXQ
) {
3014 if (ir
->op
== ir_query_levels
) {
3015 /* the level is stored in W */
3016 inst
= emit(ir
, opcode
, st_dst_reg(levels_src
), lod_info
);
3017 result_dst
.writemask
= WRITEMASK_X
;
3018 levels_src
.swizzle
= SWIZZLE_WWWW
;
3019 emit(ir
, TGSI_OPCODE_MOV
, result_dst
, levels_src
);
3021 inst
= emit(ir
, opcode
, result_dst
, lod_info
);
3022 } else if (opcode
== TGSI_OPCODE_TXF
) {
3023 inst
= emit(ir
, opcode
, result_dst
, coord
);
3024 } else if (opcode
== TGSI_OPCODE_TXL2
|| opcode
== TGSI_OPCODE_TXB2
) {
3025 inst
= emit(ir
, opcode
, result_dst
, coord
, lod_info
);
3026 } else if (opcode
== TGSI_OPCODE_TEX2
) {
3027 inst
= emit(ir
, opcode
, result_dst
, coord
, cube_sc
);
3028 } else if (opcode
== TGSI_OPCODE_TG4
) {
3029 if (is_cube_array
&& ir
->shadow_comparitor
) {
3030 inst
= emit(ir
, opcode
, result_dst
, coord
, cube_sc
);
3032 inst
= emit(ir
, opcode
, result_dst
, coord
, component
);
3035 inst
= emit(ir
, opcode
, result_dst
, coord
);
3037 if (ir
->shadow_comparitor
)
3038 inst
->tex_shadow
= GL_TRUE
;
3040 inst
->sampler
.index
= _mesa_get_sampler_uniform_value(ir
->sampler
,
3041 this->shader_program
,
3043 if (sampler_index
) {
3044 inst
->sampler
.reladdr
= ralloc(mem_ctx
, st_src_reg
);
3045 memcpy(inst
->sampler
.reladdr
, &sampler_reladdr
, sizeof(sampler_reladdr
));
3046 inst
->sampler_array_size
=
3047 ir
->sampler
->as_dereference_array()->array
->type
->array_size();
3049 inst
->sampler_array_size
= 1;
3053 for (i
= 0; i
< MAX_GLSL_TEXTURE_OFFSET
&& offset
[i
].file
!= PROGRAM_UNDEFINED
; i
++)
3054 inst
->tex_offsets
[i
] = offset
[i
];
3055 inst
->tex_offset_num_offset
= i
;
3058 switch (sampler_type
->sampler_dimensionality
) {
3059 case GLSL_SAMPLER_DIM_1D
:
3060 inst
->tex_target
= (sampler_type
->sampler_array
)
3061 ? TEXTURE_1D_ARRAY_INDEX
: TEXTURE_1D_INDEX
;
3063 case GLSL_SAMPLER_DIM_2D
:
3064 inst
->tex_target
= (sampler_type
->sampler_array
)
3065 ? TEXTURE_2D_ARRAY_INDEX
: TEXTURE_2D_INDEX
;
3067 case GLSL_SAMPLER_DIM_3D
:
3068 inst
->tex_target
= TEXTURE_3D_INDEX
;
3070 case GLSL_SAMPLER_DIM_CUBE
:
3071 inst
->tex_target
= (sampler_type
->sampler_array
)
3072 ? TEXTURE_CUBE_ARRAY_INDEX
: TEXTURE_CUBE_INDEX
;
3074 case GLSL_SAMPLER_DIM_RECT
:
3075 inst
->tex_target
= TEXTURE_RECT_INDEX
;
3077 case GLSL_SAMPLER_DIM_BUF
:
3078 inst
->tex_target
= TEXTURE_BUFFER_INDEX
;
3080 case GLSL_SAMPLER_DIM_EXTERNAL
:
3081 inst
->tex_target
= TEXTURE_EXTERNAL_INDEX
;
3083 case GLSL_SAMPLER_DIM_MS
:
3084 inst
->tex_target
= (sampler_type
->sampler_array
)
3085 ? TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX
: TEXTURE_2D_MULTISAMPLE_INDEX
;
3088 assert(!"Should not get here.");
3091 this->result
= result_src
;
3095 glsl_to_tgsi_visitor::visit(ir_return
*ir
)
3097 if (ir
->get_value()) {
3101 assert(current_function
);
3103 ir
->get_value()->accept(this);
3104 st_src_reg r
= this->result
;
3106 l
= st_dst_reg(current_function
->return_reg
);
3108 for (i
= 0; i
< type_size(current_function
->sig
->return_type
); i
++) {
3109 emit(ir
, TGSI_OPCODE_MOV
, l
, r
);
3115 emit(ir
, TGSI_OPCODE_RET
);
3119 glsl_to_tgsi_visitor::visit(ir_discard
*ir
)
3121 if (ir
->condition
) {
3122 ir
->condition
->accept(this);
3123 st_src_reg condition
= this->result
;
3125 /* Convert the bool condition to a float so we can negate. */
3126 if (native_integers
) {
3127 st_src_reg temp
= get_temp(ir
->condition
->type
);
3128 emit(ir
, TGSI_OPCODE_AND
, st_dst_reg(temp
),
3129 condition
, st_src_reg_for_float(1.0));
3133 condition
.negate
= ~condition
.negate
;
3134 emit(ir
, TGSI_OPCODE_KILL_IF
, undef_dst
, condition
);
3136 /* unconditional kil */
3137 emit(ir
, TGSI_OPCODE_KILL
);
3142 glsl_to_tgsi_visitor::visit(ir_if
*ir
)
3145 glsl_to_tgsi_instruction
*if_inst
;
3147 ir
->condition
->accept(this);
3148 assert(this->result
.file
!= PROGRAM_UNDEFINED
);
3150 if_opcode
= native_integers
? TGSI_OPCODE_UIF
: TGSI_OPCODE_IF
;
3152 if_inst
= emit(ir
->condition
, if_opcode
, undef_dst
, this->result
);
3154 this->instructions
.push_tail(if_inst
);
3156 visit_exec_list(&ir
->then_instructions
, this);
3158 if (!ir
->else_instructions
.is_empty()) {
3159 emit(ir
->condition
, TGSI_OPCODE_ELSE
);
3160 visit_exec_list(&ir
->else_instructions
, this);
3163 if_inst
= emit(ir
->condition
, TGSI_OPCODE_ENDIF
);
3168 glsl_to_tgsi_visitor::visit(ir_emit_vertex
*ir
)
3170 assert(this->prog
->Target
== GL_GEOMETRY_PROGRAM_NV
);
3172 ir
->stream
->accept(this);
3173 emit(ir
, TGSI_OPCODE_EMIT
, undef_dst
, this->result
);
3177 glsl_to_tgsi_visitor::visit(ir_end_primitive
*ir
)
3179 assert(this->prog
->Target
== GL_GEOMETRY_PROGRAM_NV
);
3181 ir
->stream
->accept(this);
3182 emit(ir
, TGSI_OPCODE_ENDPRIM
, undef_dst
, this->result
);
3185 glsl_to_tgsi_visitor::glsl_to_tgsi_visitor()
3187 result
.file
= PROGRAM_UNDEFINED
;
3190 next_signature_id
= 1;
3192 current_function
= NULL
;
3193 num_address_regs
= 0;
3195 indirect_addr_consts
= false;
3197 native_integers
= false;
3198 mem_ctx
= ralloc_context(NULL
);
3201 shader_program
= NULL
;
3207 glsl_to_tgsi_visitor::~glsl_to_tgsi_visitor()
3209 ralloc_free(mem_ctx
);
3212 extern "C" void free_glsl_to_tgsi_visitor(glsl_to_tgsi_visitor
*v
)
3219 * Count resources used by the given gpu program (number of texture
3223 count_resources(glsl_to_tgsi_visitor
*v
, gl_program
*prog
)
3225 v
->samplers_used
= 0;
3227 foreach_in_list(glsl_to_tgsi_instruction
, inst
, &v
->instructions
) {
3228 if (is_tex_instruction(inst
->op
)) {
3229 for (int i
= 0; i
< inst
->sampler_array_size
; i
++) {
3230 v
->samplers_used
|= 1 << (inst
->sampler
.index
+ i
);
3232 if (inst
->tex_shadow
) {
3233 prog
->ShadowSamplers
|= 1 << (inst
->sampler
.index
+ i
);
3238 prog
->SamplersUsed
= v
->samplers_used
;
3240 if (v
->shader_program
!= NULL
)
3241 _mesa_update_shader_textures_used(v
->shader_program
, prog
);
3245 * Returns the mask of channels (bitmask of WRITEMASK_X,Y,Z,W) which
3246 * are read from the given src in this instruction
3249 get_src_arg_mask(st_dst_reg dst
, st_src_reg src
)
3251 int read_mask
= 0, comp
;
3253 /* Now, given the src swizzle and the written channels, find which
3254 * components are actually read
3256 for (comp
= 0; comp
< 4; ++comp
) {
3257 const unsigned coord
= GET_SWZ(src
.swizzle
, comp
);
3259 if (dst
.writemask
& (1 << comp
) && coord
<= SWIZZLE_W
)
3260 read_mask
|= 1 << coord
;
3267 * This pass replaces CMP T0, T1 T2 T0 with MOV T0, T2 when the CMP
3268 * instruction is the first instruction to write to register T0. There are
3269 * several lowering passes done in GLSL IR (e.g. branches and
3270 * relative addressing) that create a large number of conditional assignments
3271 * that ir_to_mesa converts to CMP instructions like the one mentioned above.
3273 * Here is why this conversion is safe:
3274 * CMP T0, T1 T2 T0 can be expanded to:
3280 * If (T1 < 0.0) evaluates to true then our replacement MOV T0, T2 is the same
3281 * as the original program. If (T1 < 0.0) evaluates to false, executing
3282 * MOV T0, T0 will store a garbage value in T0 since T0 is uninitialized.
3283 * Therefore, it doesn't matter that we are replacing MOV T0, T0 with MOV T0, T2
3284 * because any instruction that was going to read from T0 after this was going
3285 * to read a garbage value anyway.
3288 glsl_to_tgsi_visitor::simplify_cmp(void)
3290 int tempWritesSize
= 0;
3291 unsigned *tempWrites
= NULL
;
3292 unsigned outputWrites
[MAX_PROGRAM_OUTPUTS
];
3294 memset(outputWrites
, 0, sizeof(outputWrites
));
3296 foreach_in_list(glsl_to_tgsi_instruction
, inst
, &this->instructions
) {
3297 unsigned prevWriteMask
= 0;
3299 /* Give up if we encounter relative addressing or flow control. */
3300 if (inst
->dst
.reladdr
||
3301 tgsi_get_opcode_info(inst
->op
)->is_branch
||
3302 inst
->op
== TGSI_OPCODE_BGNSUB
||
3303 inst
->op
== TGSI_OPCODE_CONT
||
3304 inst
->op
== TGSI_OPCODE_END
||
3305 inst
->op
== TGSI_OPCODE_ENDSUB
||
3306 inst
->op
== TGSI_OPCODE_RET
) {
3310 if (inst
->dst
.file
== PROGRAM_OUTPUT
) {
3311 assert(inst
->dst
.index
< MAX_PROGRAM_OUTPUTS
);
3312 prevWriteMask
= outputWrites
[inst
->dst
.index
];
3313 outputWrites
[inst
->dst
.index
] |= inst
->dst
.writemask
;
3314 } else if (inst
->dst
.file
== PROGRAM_TEMPORARY
) {
3315 if (inst
->dst
.index
>= tempWritesSize
) {
3316 const int inc
= 4096;
3318 tempWrites
= (unsigned*)
3320 (tempWritesSize
+ inc
) * sizeof(unsigned));
3324 memset(tempWrites
+ tempWritesSize
, 0, inc
* sizeof(unsigned));
3325 tempWritesSize
+= inc
;
3328 prevWriteMask
= tempWrites
[inst
->dst
.index
];
3329 tempWrites
[inst
->dst
.index
] |= inst
->dst
.writemask
;
3333 /* For a CMP to be considered a conditional write, the destination
3334 * register and source register two must be the same. */
3335 if (inst
->op
== TGSI_OPCODE_CMP
3336 && !(inst
->dst
.writemask
& prevWriteMask
)
3337 && inst
->src
[2].file
== inst
->dst
.file
3338 && inst
->src
[2].index
== inst
->dst
.index
3339 && inst
->dst
.writemask
== get_src_arg_mask(inst
->dst
, inst
->src
[2])) {
3341 inst
->op
= TGSI_OPCODE_MOV
;
3342 inst
->src
[0] = inst
->src
[1];
3349 /* Replaces all references to a temporary register index with another index. */
3351 glsl_to_tgsi_visitor::rename_temp_register(int index
, int new_index
)
3353 foreach_in_list(glsl_to_tgsi_instruction
, inst
, &this->instructions
) {
3356 for (j
= 0; j
< num_inst_src_regs(inst
->op
); j
++) {
3357 if (inst
->src
[j
].file
== PROGRAM_TEMPORARY
&&
3358 inst
->src
[j
].index
== index
) {
3359 inst
->src
[j
].index
= new_index
;
3363 for (j
= 0; j
< inst
->tex_offset_num_offset
; j
++) {
3364 if (inst
->tex_offsets
[j
].file
== PROGRAM_TEMPORARY
&&
3365 inst
->tex_offsets
[j
].index
== index
) {
3366 inst
->tex_offsets
[j
].index
= new_index
;
3370 if (inst
->dst
.file
== PROGRAM_TEMPORARY
&& inst
->dst
.index
== index
) {
3371 inst
->dst
.index
= new_index
;
3377 glsl_to_tgsi_visitor::get_first_temp_read(int index
)
3379 int depth
= 0; /* loop depth */
3380 int loop_start
= -1; /* index of the first active BGNLOOP (if any) */
3383 foreach_in_list(glsl_to_tgsi_instruction
, inst
, &this->instructions
) {
3384 for (j
= 0; j
< num_inst_src_regs(inst
->op
); j
++) {
3385 if (inst
->src
[j
].file
== PROGRAM_TEMPORARY
&&
3386 inst
->src
[j
].index
== index
) {
3387 return (depth
== 0) ? i
: loop_start
;
3390 for (j
= 0; j
< inst
->tex_offset_num_offset
; j
++) {
3391 if (inst
->tex_offsets
[j
].file
== PROGRAM_TEMPORARY
&&
3392 inst
->tex_offsets
[j
].index
== index
) {
3393 return (depth
== 0) ? i
: loop_start
;
3396 if (inst
->op
== TGSI_OPCODE_BGNLOOP
) {
3399 } else if (inst
->op
== TGSI_OPCODE_ENDLOOP
) {
3410 glsl_to_tgsi_visitor::get_first_temp_write(int index
)
3412 int depth
= 0; /* loop depth */
3413 int loop_start
= -1; /* index of the first active BGNLOOP (if any) */
3416 foreach_in_list(glsl_to_tgsi_instruction
, inst
, &this->instructions
) {
3417 if (inst
->dst
.file
== PROGRAM_TEMPORARY
&& inst
->dst
.index
== index
) {
3418 return (depth
== 0) ? i
: loop_start
;
3420 if (inst
->op
== TGSI_OPCODE_BGNLOOP
) {
3423 } else if (inst
->op
== TGSI_OPCODE_ENDLOOP
) {
3434 glsl_to_tgsi_visitor::get_last_temp_read(int index
)
3436 int depth
= 0; /* loop depth */
3437 int last
= -1; /* index of last instruction that reads the temporary */
3440 foreach_in_list(glsl_to_tgsi_instruction
, inst
, &this->instructions
) {
3441 for (j
= 0; j
< num_inst_src_regs(inst
->op
); j
++) {
3442 if (inst
->src
[j
].file
== PROGRAM_TEMPORARY
&&
3443 inst
->src
[j
].index
== index
) {
3444 last
= (depth
== 0) ? i
: -2;
3447 for (j
= 0; j
< inst
->tex_offset_num_offset
; j
++) {
3448 if (inst
->tex_offsets
[j
].file
== PROGRAM_TEMPORARY
&&
3449 inst
->tex_offsets
[j
].index
== index
)
3450 last
= (depth
== 0) ? i
: -2;
3452 if (inst
->op
== TGSI_OPCODE_BGNLOOP
)
3454 else if (inst
->op
== TGSI_OPCODE_ENDLOOP
)
3455 if (--depth
== 0 && last
== -2)
3465 glsl_to_tgsi_visitor::get_last_temp_write(int index
)
3467 int depth
= 0; /* loop depth */
3468 int last
= -1; /* index of last instruction that writes to the temporary */
3471 foreach_in_list(glsl_to_tgsi_instruction
, inst
, &this->instructions
) {
3472 if (inst
->dst
.file
== PROGRAM_TEMPORARY
&& inst
->dst
.index
== index
)
3473 last
= (depth
== 0) ? i
: -2;
3475 if (inst
->op
== TGSI_OPCODE_BGNLOOP
)
3477 else if (inst
->op
== TGSI_OPCODE_ENDLOOP
)
3478 if (--depth
== 0 && last
== -2)
3488 * On a basic block basis, tracks available PROGRAM_TEMPORARY register
3489 * channels for copy propagation and updates following instructions to
3490 * use the original versions.
3492 * The glsl_to_tgsi_visitor lazily produces code assuming that this pass
3493 * will occur. As an example, a TXP production before this pass:
3495 * 0: MOV TEMP[1], INPUT[4].xyyy;
3496 * 1: MOV TEMP[1].w, INPUT[4].wwww;
3497 * 2: TXP TEMP[2], TEMP[1], texture[0], 2D;
3501 * 0: MOV TEMP[1], INPUT[4].xyyy;
3502 * 1: MOV TEMP[1].w, INPUT[4].wwww;
3503 * 2: TXP TEMP[2], INPUT[4].xyyw, texture[0], 2D;
3505 * which allows for dead code elimination on TEMP[1]'s writes.
3508 glsl_to_tgsi_visitor::copy_propagate(void)
3510 glsl_to_tgsi_instruction
**acp
= rzalloc_array(mem_ctx
,
3511 glsl_to_tgsi_instruction
*,
3512 this->next_temp
* 4);
3513 int *acp_level
= rzalloc_array(mem_ctx
, int, this->next_temp
* 4);
3516 foreach_in_list(glsl_to_tgsi_instruction
, inst
, &this->instructions
) {
3517 assert(inst
->dst
.file
!= PROGRAM_TEMPORARY
3518 || inst
->dst
.index
< this->next_temp
);
3520 /* First, do any copy propagation possible into the src regs. */
3521 for (int r
= 0; r
< 3; r
++) {
3522 glsl_to_tgsi_instruction
*first
= NULL
;
3524 int acp_base
= inst
->src
[r
].index
* 4;
3526 if (inst
->src
[r
].file
!= PROGRAM_TEMPORARY
||
3527 inst
->src
[r
].reladdr
||
3528 inst
->src
[r
].reladdr2
)
3531 /* See if we can find entries in the ACP consisting of MOVs
3532 * from the same src register for all the swizzled channels
3533 * of this src register reference.
3535 for (int i
= 0; i
< 4; i
++) {
3536 int src_chan
= GET_SWZ(inst
->src
[r
].swizzle
, i
);
3537 glsl_to_tgsi_instruction
*copy_chan
= acp
[acp_base
+ src_chan
];
3544 assert(acp_level
[acp_base
+ src_chan
] <= level
);
3549 if (first
->src
[0].file
!= copy_chan
->src
[0].file
||
3550 first
->src
[0].index
!= copy_chan
->src
[0].index
||
3551 first
->src
[0].index2D
!= copy_chan
->src
[0].index2D
) {
3559 /* We've now validated that we can copy-propagate to
3560 * replace this src register reference. Do it.
3562 inst
->src
[r
].file
= first
->src
[0].file
;
3563 inst
->src
[r
].index
= first
->src
[0].index
;
3564 inst
->src
[r
].index2D
= first
->src
[0].index2D
;
3565 inst
->src
[r
].has_index2
= first
->src
[0].has_index2
;
3568 for (int i
= 0; i
< 4; i
++) {
3569 int src_chan
= GET_SWZ(inst
->src
[r
].swizzle
, i
);
3570 glsl_to_tgsi_instruction
*copy_inst
= acp
[acp_base
+ src_chan
];
3571 swizzle
|= (GET_SWZ(copy_inst
->src
[0].swizzle
, src_chan
) << (3 * i
));
3573 inst
->src
[r
].swizzle
= swizzle
;
3578 case TGSI_OPCODE_BGNLOOP
:
3579 case TGSI_OPCODE_ENDLOOP
:
3580 /* End of a basic block, clear the ACP entirely. */
3581 memset(acp
, 0, sizeof(*acp
) * this->next_temp
* 4);
3584 case TGSI_OPCODE_IF
:
3585 case TGSI_OPCODE_UIF
:
3589 case TGSI_OPCODE_ENDIF
:
3590 case TGSI_OPCODE_ELSE
:
3591 /* Clear all channels written inside the block from the ACP, but
3592 * leaving those that were not touched.
3594 for (int r
= 0; r
< this->next_temp
; r
++) {
3595 for (int c
= 0; c
< 4; c
++) {
3596 if (!acp
[4 * r
+ c
])
3599 if (acp_level
[4 * r
+ c
] >= level
)
3600 acp
[4 * r
+ c
] = NULL
;
3603 if (inst
->op
== TGSI_OPCODE_ENDIF
)
3608 /* Continuing the block, clear any written channels from
3611 if (inst
->dst
.file
== PROGRAM_TEMPORARY
&& inst
->dst
.reladdr
) {
3612 /* Any temporary might be written, so no copy propagation
3613 * across this instruction.
3615 memset(acp
, 0, sizeof(*acp
) * this->next_temp
* 4);
3616 } else if (inst
->dst
.file
== PROGRAM_OUTPUT
&&
3617 inst
->dst
.reladdr
) {
3618 /* Any output might be written, so no copy propagation
3619 * from outputs across this instruction.
3621 for (int r
= 0; r
< this->next_temp
; r
++) {
3622 for (int c
= 0; c
< 4; c
++) {
3623 if (!acp
[4 * r
+ c
])
3626 if (acp
[4 * r
+ c
]->src
[0].file
== PROGRAM_OUTPUT
)
3627 acp
[4 * r
+ c
] = NULL
;
3630 } else if (inst
->dst
.file
== PROGRAM_TEMPORARY
||
3631 inst
->dst
.file
== PROGRAM_OUTPUT
) {
3632 /* Clear where it's used as dst. */
3633 if (inst
->dst
.file
== PROGRAM_TEMPORARY
) {
3634 for (int c
= 0; c
< 4; c
++) {
3635 if (inst
->dst
.writemask
& (1 << c
)) {
3636 acp
[4 * inst
->dst
.index
+ c
] = NULL
;
3641 /* Clear where it's used as src. */
3642 for (int r
= 0; r
< this->next_temp
; r
++) {
3643 for (int c
= 0; c
< 4; c
++) {
3644 if (!acp
[4 * r
+ c
])
3647 int src_chan
= GET_SWZ(acp
[4 * r
+ c
]->src
[0].swizzle
, c
);
3649 if (acp
[4 * r
+ c
]->src
[0].file
== inst
->dst
.file
&&
3650 acp
[4 * r
+ c
]->src
[0].index
== inst
->dst
.index
&&
3651 inst
->dst
.writemask
& (1 << src_chan
))
3652 acp
[4 * r
+ c
] = NULL
;
3659 /* If this is a copy, add it to the ACP. */
3660 if (inst
->op
== TGSI_OPCODE_MOV
&&
3661 inst
->dst
.file
== PROGRAM_TEMPORARY
&&
3662 !(inst
->dst
.file
== inst
->src
[0].file
&&
3663 inst
->dst
.index
== inst
->src
[0].index
) &&
3664 !inst
->dst
.reladdr
&&
3666 !inst
->src
[0].reladdr
&&
3667 !inst
->src
[0].reladdr2
&&
3668 !inst
->src
[0].negate
) {
3669 for (int i
= 0; i
< 4; i
++) {
3670 if (inst
->dst
.writemask
& (1 << i
)) {
3671 acp
[4 * inst
->dst
.index
+ i
] = inst
;
3672 acp_level
[4 * inst
->dst
.index
+ i
] = level
;
3678 ralloc_free(acp_level
);
3683 * On a basic block basis, tracks available PROGRAM_TEMPORARY registers for dead
3686 * The glsl_to_tgsi_visitor lazily produces code assuming that this pass
3687 * will occur. As an example, a TXP production after copy propagation but
3690 * 0: MOV TEMP[1], INPUT[4].xyyy;
3691 * 1: MOV TEMP[1].w, INPUT[4].wwww;
3692 * 2: TXP TEMP[2], INPUT[4].xyyw, texture[0], 2D;
3694 * and after this pass:
3696 * 0: TXP TEMP[2], INPUT[4].xyyw, texture[0], 2D;
3699 glsl_to_tgsi_visitor::eliminate_dead_code(void)
3701 glsl_to_tgsi_instruction
**writes
= rzalloc_array(mem_ctx
,
3702 glsl_to_tgsi_instruction
*,
3703 this->next_temp
* 4);
3704 int *write_level
= rzalloc_array(mem_ctx
, int, this->next_temp
* 4);
3708 foreach_in_list(glsl_to_tgsi_instruction
, inst
, &this->instructions
) {
3709 assert(inst
->dst
.file
!= PROGRAM_TEMPORARY
3710 || inst
->dst
.index
< this->next_temp
);
3713 case TGSI_OPCODE_BGNLOOP
:
3714 case TGSI_OPCODE_ENDLOOP
:
3715 case TGSI_OPCODE_CONT
:
3716 case TGSI_OPCODE_BRK
:
3717 /* End of a basic block, clear the write array entirely.
3719 * This keeps us from killing dead code when the writes are
3720 * on either side of a loop, even when the register isn't touched
3721 * inside the loop. However, glsl_to_tgsi_visitor doesn't seem to emit
3722 * dead code of this type, so it shouldn't make a difference as long as
3723 * the dead code elimination pass in the GLSL compiler does its job.
3725 memset(writes
, 0, sizeof(*writes
) * this->next_temp
* 4);
3728 case TGSI_OPCODE_ENDIF
:
3729 case TGSI_OPCODE_ELSE
:
3730 /* Promote the recorded level of all channels written inside the
3731 * preceding if or else block to the level above the if/else block.
3733 for (int r
= 0; r
< this->next_temp
; r
++) {
3734 for (int c
= 0; c
< 4; c
++) {
3735 if (!writes
[4 * r
+ c
])
3738 if (write_level
[4 * r
+ c
] == level
)
3739 write_level
[4 * r
+ c
] = level
-1;
3742 if(inst
->op
== TGSI_OPCODE_ENDIF
)
3746 case TGSI_OPCODE_IF
:
3747 case TGSI_OPCODE_UIF
:
3749 /* fallthrough to default case to mark the condition as read */
3751 /* Continuing the block, clear any channels from the write array that
3752 * are read by this instruction.
3754 for (unsigned i
= 0; i
< Elements(inst
->src
); i
++) {
3755 if (inst
->src
[i
].file
== PROGRAM_TEMPORARY
&& inst
->src
[i
].reladdr
){
3756 /* Any temporary might be read, so no dead code elimination
3757 * across this instruction.
3759 memset(writes
, 0, sizeof(*writes
) * this->next_temp
* 4);
3760 } else if (inst
->src
[i
].file
== PROGRAM_TEMPORARY
) {
3761 /* Clear where it's used as src. */
3762 int src_chans
= 1 << GET_SWZ(inst
->src
[i
].swizzle
, 0);
3763 src_chans
|= 1 << GET_SWZ(inst
->src
[i
].swizzle
, 1);
3764 src_chans
|= 1 << GET_SWZ(inst
->src
[i
].swizzle
, 2);
3765 src_chans
|= 1 << GET_SWZ(inst
->src
[i
].swizzle
, 3);
3767 for (int c
= 0; c
< 4; c
++) {
3768 if (src_chans
& (1 << c
))
3769 writes
[4 * inst
->src
[i
].index
+ c
] = NULL
;
3773 for (unsigned i
= 0; i
< inst
->tex_offset_num_offset
; i
++) {
3774 if (inst
->tex_offsets
[i
].file
== PROGRAM_TEMPORARY
&& inst
->tex_offsets
[i
].reladdr
){
3775 /* Any temporary might be read, so no dead code elimination
3776 * across this instruction.
3778 memset(writes
, 0, sizeof(*writes
) * this->next_temp
* 4);
3779 } else if (inst
->tex_offsets
[i
].file
== PROGRAM_TEMPORARY
) {
3780 /* Clear where it's used as src. */
3781 int src_chans
= 1 << GET_SWZ(inst
->tex_offsets
[i
].swizzle
, 0);
3782 src_chans
|= 1 << GET_SWZ(inst
->tex_offsets
[i
].swizzle
, 1);
3783 src_chans
|= 1 << GET_SWZ(inst
->tex_offsets
[i
].swizzle
, 2);
3784 src_chans
|= 1 << GET_SWZ(inst
->tex_offsets
[i
].swizzle
, 3);
3786 for (int c
= 0; c
< 4; c
++) {
3787 if (src_chans
& (1 << c
))
3788 writes
[4 * inst
->tex_offsets
[i
].index
+ c
] = NULL
;
3795 /* If this instruction writes to a temporary, add it to the write array.
3796 * If there is already an instruction in the write array for one or more
3797 * of the channels, flag that channel write as dead.
3799 if (inst
->dst
.file
== PROGRAM_TEMPORARY
&&
3800 !inst
->dst
.reladdr
&&
3802 for (int c
= 0; c
< 4; c
++) {
3803 if (inst
->dst
.writemask
& (1 << c
)) {
3804 if (writes
[4 * inst
->dst
.index
+ c
]) {
3805 if (write_level
[4 * inst
->dst
.index
+ c
] < level
)
3808 writes
[4 * inst
->dst
.index
+ c
]->dead_mask
|= (1 << c
);
3810 writes
[4 * inst
->dst
.index
+ c
] = inst
;
3811 write_level
[4 * inst
->dst
.index
+ c
] = level
;
3817 /* Anything still in the write array at this point is dead code. */
3818 for (int r
= 0; r
< this->next_temp
; r
++) {
3819 for (int c
= 0; c
< 4; c
++) {
3820 glsl_to_tgsi_instruction
*inst
= writes
[4 * r
+ c
];
3822 inst
->dead_mask
|= (1 << c
);
3826 /* Now actually remove the instructions that are completely dead and update
3827 * the writemask of other instructions with dead channels.
3829 foreach_in_list_safe(glsl_to_tgsi_instruction
, inst
, &this->instructions
) {
3830 if (!inst
->dead_mask
|| !inst
->dst
.writemask
)
3832 else if ((inst
->dst
.writemask
& ~inst
->dead_mask
) == 0) {
3837 inst
->dst
.writemask
&= ~(inst
->dead_mask
);
3840 ralloc_free(write_level
);
3841 ralloc_free(writes
);
3846 /* Merges temporary registers together where possible to reduce the number of
3847 * registers needed to run a program.
3849 * Produces optimal code only after copy propagation and dead code elimination
3852 glsl_to_tgsi_visitor::merge_registers(void)
3854 int *last_reads
= rzalloc_array(mem_ctx
, int, this->next_temp
);
3855 int *first_writes
= rzalloc_array(mem_ctx
, int, this->next_temp
);
3858 /* Read the indices of the last read and first write to each temp register
3859 * into an array so that we don't have to traverse the instruction list as
3861 for (i
= 0; i
< this->next_temp
; i
++) {
3862 last_reads
[i
] = get_last_temp_read(i
);
3863 first_writes
[i
] = get_first_temp_write(i
);
3866 /* Start looking for registers with non-overlapping usages that can be
3867 * merged together. */
3868 for (i
= 0; i
< this->next_temp
; i
++) {
3869 /* Don't touch unused registers. */
3870 if (last_reads
[i
] < 0 || first_writes
[i
] < 0) continue;
3872 for (j
= 0; j
< this->next_temp
; j
++) {
3873 /* Don't touch unused registers. */
3874 if (last_reads
[j
] < 0 || first_writes
[j
] < 0) continue;
3876 /* We can merge the two registers if the first write to j is after or
3877 * in the same instruction as the last read from i. Note that the
3878 * register at index i will always be used earlier or at the same time
3879 * as the register at index j. */
3880 if (first_writes
[i
] <= first_writes
[j
] &&
3881 last_reads
[i
] <= first_writes
[j
]) {
3882 rename_temp_register(j
, i
); /* Replace all references to j with i.*/
3884 /* Update the first_writes and last_reads arrays with the new
3885 * values for the merged register index, and mark the newly unused
3886 * register index as such. */
3887 last_reads
[i
] = last_reads
[j
];
3888 first_writes
[j
] = -1;
3894 ralloc_free(last_reads
);
3895 ralloc_free(first_writes
);
3898 /* Reassign indices to temporary registers by reusing unused indices created
3899 * by optimization passes. */
3901 glsl_to_tgsi_visitor::renumber_registers(void)
3906 for (i
= 0; i
< this->next_temp
; i
++) {
3907 if (get_first_temp_read(i
) < 0) continue;
3909 rename_temp_register(i
, new_index
);
3913 this->next_temp
= new_index
;
3917 * Returns a fragment program which implements the current pixel transfer ops.
3918 * Based on get_pixel_transfer_program in st_atom_pixeltransfer.c.
3921 get_pixel_transfer_visitor(struct st_fragment_program
*fp
,
3922 glsl_to_tgsi_visitor
*original
,
3923 int scale_and_bias
, int pixel_maps
)
3925 glsl_to_tgsi_visitor
*v
= new glsl_to_tgsi_visitor();
3926 struct st_context
*st
= st_context(original
->ctx
);
3927 struct gl_program
*prog
= &fp
->Base
.Base
;
3928 struct gl_program_parameter_list
*params
= _mesa_new_parameter_list();
3929 st_src_reg coord
, src0
;
3931 glsl_to_tgsi_instruction
*inst
;
3933 /* Copy attributes of the glsl_to_tgsi_visitor in the original shader. */
3934 v
->ctx
= original
->ctx
;
3936 v
->shader_program
= NULL
;
3938 v
->glsl_version
= original
->glsl_version
;
3939 v
->native_integers
= original
->native_integers
;
3940 v
->options
= original
->options
;
3941 v
->next_temp
= original
->next_temp
;
3942 v
->num_address_regs
= original
->num_address_regs
;
3943 v
->samplers_used
= prog
->SamplersUsed
= original
->samplers_used
;
3944 v
->indirect_addr_consts
= original
->indirect_addr_consts
;
3945 memcpy(&v
->immediates
, &original
->immediates
, sizeof(v
->immediates
));
3946 v
->num_immediates
= original
->num_immediates
;
3949 * Get initial pixel color from the texture.
3950 * TEX colorTemp, fragment.texcoord[0], texture[0], 2D;
3952 coord
= st_src_reg(PROGRAM_INPUT
, VARYING_SLOT_TEX0
, glsl_type::vec2_type
);
3953 src0
= v
->get_temp(glsl_type::vec4_type
);
3954 dst0
= st_dst_reg(src0
);
3955 inst
= v
->emit(NULL
, TGSI_OPCODE_TEX
, dst0
, coord
);
3956 inst
->sampler_array_size
= 1;
3957 inst
->tex_target
= TEXTURE_2D_INDEX
;
3959 prog
->InputsRead
|= VARYING_BIT_TEX0
;
3960 prog
->SamplersUsed
|= (1 << 0); /* mark sampler 0 as used */
3961 v
->samplers_used
|= (1 << 0);
3963 if (scale_and_bias
) {
3964 static const gl_state_index scale_state
[STATE_LENGTH
] =
3965 { STATE_INTERNAL
, STATE_PT_SCALE
,
3966 (gl_state_index
) 0, (gl_state_index
) 0, (gl_state_index
) 0 };
3967 static const gl_state_index bias_state
[STATE_LENGTH
] =
3968 { STATE_INTERNAL
, STATE_PT_BIAS
,
3969 (gl_state_index
) 0, (gl_state_index
) 0, (gl_state_index
) 0 };
3970 GLint scale_p
, bias_p
;
3971 st_src_reg scale
, bias
;
3973 scale_p
= _mesa_add_state_reference(params
, scale_state
);
3974 bias_p
= _mesa_add_state_reference(params
, bias_state
);
3976 /* MAD colorTemp, colorTemp, scale, bias; */
3977 scale
= st_src_reg(PROGRAM_STATE_VAR
, scale_p
, GLSL_TYPE_FLOAT
);
3978 bias
= st_src_reg(PROGRAM_STATE_VAR
, bias_p
, GLSL_TYPE_FLOAT
);
3979 inst
= v
->emit(NULL
, TGSI_OPCODE_MAD
, dst0
, src0
, scale
, bias
);
3983 st_src_reg temp
= v
->get_temp(glsl_type::vec4_type
);
3984 st_dst_reg temp_dst
= st_dst_reg(temp
);
3986 assert(st
->pixel_xfer
.pixelmap_texture
);
3988 /* With a little effort, we can do four pixel map look-ups with
3989 * two TEX instructions:
3992 /* TEX temp.rg, colorTemp.rgba, texture[1], 2D; */
3993 temp_dst
.writemask
= WRITEMASK_XY
; /* write R,G */
3994 inst
= v
->emit(NULL
, TGSI_OPCODE_TEX
, temp_dst
, src0
);
3995 inst
->sampler
.index
= 1;
3996 inst
->sampler_array_size
= 1;
3997 inst
->tex_target
= TEXTURE_2D_INDEX
;
3999 /* TEX temp.ba, colorTemp.baba, texture[1], 2D; */
4000 src0
.swizzle
= MAKE_SWIZZLE4(SWIZZLE_Z
, SWIZZLE_W
, SWIZZLE_Z
, SWIZZLE_W
);
4001 temp_dst
.writemask
= WRITEMASK_ZW
; /* write B,A */
4002 inst
= v
->emit(NULL
, TGSI_OPCODE_TEX
, temp_dst
, src0
);
4003 inst
->sampler
.index
= 1;
4004 inst
->sampler_array_size
= 1;
4005 inst
->tex_target
= TEXTURE_2D_INDEX
;
4007 prog
->SamplersUsed
|= (1 << 1); /* mark sampler 1 as used */
4008 v
->samplers_used
|= (1 << 1);
4010 /* MOV colorTemp, temp; */
4011 inst
= v
->emit(NULL
, TGSI_OPCODE_MOV
, dst0
, temp
);
4014 /* Now copy the instructions from the original glsl_to_tgsi_visitor into the
4016 foreach_in_list(glsl_to_tgsi_instruction
, inst
, &original
->instructions
) {
4017 glsl_to_tgsi_instruction
*newinst
;
4018 st_src_reg src_regs
[3];
4020 if (inst
->dst
.file
== PROGRAM_OUTPUT
)
4021 prog
->OutputsWritten
|= BITFIELD64_BIT(inst
->dst
.index
);
4023 for (int i
= 0; i
< 3; i
++) {
4024 src_regs
[i
] = inst
->src
[i
];
4025 if (src_regs
[i
].file
== PROGRAM_INPUT
&&
4026 src_regs
[i
].index
== VARYING_SLOT_COL0
) {
4027 src_regs
[i
].file
= PROGRAM_TEMPORARY
;
4028 src_regs
[i
].index
= src0
.index
;
4030 else if (src_regs
[i
].file
== PROGRAM_INPUT
)
4031 prog
->InputsRead
|= BITFIELD64_BIT(src_regs
[i
].index
);
4034 newinst
= v
->emit(NULL
, inst
->op
, inst
->dst
, src_regs
[0], src_regs
[1], src_regs
[2]);
4035 newinst
->tex_target
= inst
->tex_target
;
4036 newinst
->sampler_array_size
= inst
->sampler_array_size
;
4039 /* Make modifications to fragment program info. */
4040 prog
->Parameters
= _mesa_combine_parameter_lists(params
,
4041 original
->prog
->Parameters
);
4042 _mesa_free_parameter_list(params
);
4043 count_resources(v
, prog
);
4044 fp
->glsl_to_tgsi
= v
;
4048 * Make fragment program for glBitmap:
4049 * Sample the texture and kill the fragment if the bit is 0.
4050 * This program will be combined with the user's fragment program.
4052 * Based on make_bitmap_fragment_program in st_cb_bitmap.c.
4055 get_bitmap_visitor(struct st_fragment_program
*fp
,
4056 glsl_to_tgsi_visitor
*original
, int samplerIndex
)
4058 glsl_to_tgsi_visitor
*v
= new glsl_to_tgsi_visitor();
4059 struct st_context
*st
= st_context(original
->ctx
);
4060 struct gl_program
*prog
= &fp
->Base
.Base
;
4061 st_src_reg coord
, src0
;
4063 glsl_to_tgsi_instruction
*inst
;
4065 /* Copy attributes of the glsl_to_tgsi_visitor in the original shader. */
4066 v
->ctx
= original
->ctx
;
4068 v
->shader_program
= NULL
;
4070 v
->glsl_version
= original
->glsl_version
;
4071 v
->native_integers
= original
->native_integers
;
4072 v
->options
= original
->options
;
4073 v
->next_temp
= original
->next_temp
;
4074 v
->num_address_regs
= original
->num_address_regs
;
4075 v
->samplers_used
= prog
->SamplersUsed
= original
->samplers_used
;
4076 v
->indirect_addr_consts
= original
->indirect_addr_consts
;
4077 memcpy(&v
->immediates
, &original
->immediates
, sizeof(v
->immediates
));
4078 v
->num_immediates
= original
->num_immediates
;
4080 /* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */
4081 coord
= st_src_reg(PROGRAM_INPUT
, VARYING_SLOT_TEX0
, glsl_type::vec2_type
);
4082 src0
= v
->get_temp(glsl_type::vec4_type
);
4083 dst0
= st_dst_reg(src0
);
4084 inst
= v
->emit(NULL
, TGSI_OPCODE_TEX
, dst0
, coord
);
4085 inst
->sampler
.index
= samplerIndex
;
4086 inst
->sampler_array_size
= 1;
4087 inst
->tex_target
= TEXTURE_2D_INDEX
;
4089 prog
->InputsRead
|= VARYING_BIT_TEX0
;
4090 prog
->SamplersUsed
|= (1 << samplerIndex
); /* mark sampler as used */
4091 v
->samplers_used
|= (1 << samplerIndex
);
4093 /* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */
4094 src0
.negate
= NEGATE_XYZW
;
4095 if (st
->bitmap
.tex_format
== PIPE_FORMAT_L8_UNORM
)
4096 src0
.swizzle
= SWIZZLE_XXXX
;
4097 inst
= v
->emit(NULL
, TGSI_OPCODE_KILL_IF
, undef_dst
, src0
);
4099 /* Now copy the instructions from the original glsl_to_tgsi_visitor into the
4101 foreach_in_list(glsl_to_tgsi_instruction
, inst
, &original
->instructions
) {
4102 glsl_to_tgsi_instruction
*newinst
;
4103 st_src_reg src_regs
[3];
4105 if (inst
->dst
.file
== PROGRAM_OUTPUT
)
4106 prog
->OutputsWritten
|= BITFIELD64_BIT(inst
->dst
.index
);
4108 for (int i
= 0; i
< 3; i
++) {
4109 src_regs
[i
] = inst
->src
[i
];
4110 if (src_regs
[i
].file
== PROGRAM_INPUT
)
4111 prog
->InputsRead
|= BITFIELD64_BIT(src_regs
[i
].index
);
4114 newinst
= v
->emit(NULL
, inst
->op
, inst
->dst
, src_regs
[0], src_regs
[1], src_regs
[2]);
4115 newinst
->tex_target
= inst
->tex_target
;
4116 newinst
->sampler_array_size
= inst
->sampler_array_size
;
4119 /* Make modifications to fragment program info. */
4120 prog
->Parameters
= _mesa_clone_parameter_list(original
->prog
->Parameters
);
4121 count_resources(v
, prog
);
4122 fp
->glsl_to_tgsi
= v
;
4125 /* ------------------------- TGSI conversion stuff -------------------------- */
4127 unsigned branch_target
;
4132 * Intermediate state used during shader translation.
4134 struct st_translate
{
4135 struct ureg_program
*ureg
;
4137 unsigned temps_size
;
4138 struct ureg_dst
*temps
;
4140 struct ureg_dst arrays
[MAX_ARRAYS
];
4141 struct ureg_src
*constants
;
4142 struct ureg_src
*immediates
;
4143 struct ureg_dst outputs
[PIPE_MAX_SHADER_OUTPUTS
];
4144 struct ureg_src inputs
[PIPE_MAX_SHADER_INPUTS
];
4145 struct ureg_dst address
[3];
4146 struct ureg_src samplers
[PIPE_MAX_SAMPLERS
];
4147 struct ureg_src systemValues
[SYSTEM_VALUE_MAX
];
4148 struct tgsi_texture_offset tex_offsets
[MAX_GLSL_TEXTURE_OFFSET
];
4149 unsigned array_sizes
[MAX_ARRAYS
];
4151 const GLuint
*inputMapping
;
4152 const GLuint
*outputMapping
;
4154 /* For every instruction that contains a label (eg CALL), keep
4155 * details so that we can go back afterwards and emit the correct
4156 * tgsi instruction number for each label.
4158 struct label
*labels
;
4159 unsigned labels_size
;
4160 unsigned labels_count
;
4162 /* Keep a record of the tgsi instruction number that each mesa
4163 * instruction starts at, will be used to fix up labels after
4168 unsigned insn_count
;
4170 unsigned procType
; /**< TGSI_PROCESSOR_VERTEX/FRAGMENT */
4175 /** Map Mesa's SYSTEM_VALUE_x to TGSI_SEMANTIC_x */
4176 const unsigned _mesa_sysval_to_semantic
[SYSTEM_VALUE_MAX
] = {
4179 TGSI_SEMANTIC_VERTEXID
,
4180 TGSI_SEMANTIC_INSTANCEID
,
4181 TGSI_SEMANTIC_VERTEXID_NOBASE
,
4182 TGSI_SEMANTIC_BASEVERTEX
,
4186 TGSI_SEMANTIC_INVOCATIONID
,
4191 TGSI_SEMANTIC_SAMPLEID
,
4192 TGSI_SEMANTIC_SAMPLEPOS
,
4193 TGSI_SEMANTIC_SAMPLEMASK
,
4197 * Make note of a branch to a label in the TGSI code.
4198 * After we've emitted all instructions, we'll go over the list
4199 * of labels built here and patch the TGSI code with the actual
4200 * location of each label.
4202 static unsigned *get_label(struct st_translate
*t
, unsigned branch_target
)
4206 if (t
->labels_count
+ 1 >= t
->labels_size
) {
4207 t
->labels_size
= 1 << (util_logbase2(t
->labels_size
) + 1);
4208 t
->labels
= (struct label
*)realloc(t
->labels
,
4209 t
->labels_size
* sizeof(struct label
));
4210 if (t
->labels
== NULL
) {
4211 static unsigned dummy
;
4217 i
= t
->labels_count
++;
4218 t
->labels
[i
].branch_target
= branch_target
;
4219 return &t
->labels
[i
].token
;
4223 * Called prior to emitting the TGSI code for each instruction.
4224 * Allocate additional space for instructions if needed.
4225 * Update the insn[] array so the next glsl_to_tgsi_instruction points to
4226 * the next TGSI instruction.
4228 static void set_insn_start(struct st_translate
*t
, unsigned start
)
4230 if (t
->insn_count
+ 1 >= t
->insn_size
) {
4231 t
->insn_size
= 1 << (util_logbase2(t
->insn_size
) + 1);
4232 t
->insn
= (unsigned *)realloc(t
->insn
, t
->insn_size
* sizeof(t
->insn
[0]));
4233 if (t
->insn
== NULL
) {
4239 t
->insn
[t
->insn_count
++] = start
;
4243 * Map a glsl_to_tgsi constant/immediate to a TGSI immediate.
4245 static struct ureg_src
4246 emit_immediate(struct st_translate
*t
,
4247 gl_constant_value values
[4],
4250 struct ureg_program
*ureg
= t
->ureg
;
4255 return ureg_DECL_immediate(ureg
, &values
[0].f
, size
);
4257 return ureg_DECL_immediate_int(ureg
, &values
[0].i
, size
);
4258 case GL_UNSIGNED_INT
:
4260 return ureg_DECL_immediate_uint(ureg
, &values
[0].u
, size
);
4262 assert(!"should not get here - type must be float, int, uint, or bool");
4263 return ureg_src_undef();
4268 * Map a glsl_to_tgsi dst register to a TGSI ureg_dst register.
4270 static struct ureg_dst
4271 dst_register(struct st_translate
*t
,
4272 gl_register_file file
,
4278 case PROGRAM_UNDEFINED
:
4279 return ureg_dst_undef();
4281 case PROGRAM_TEMPORARY
:
4282 /* Allocate space for temporaries on demand. */
4283 if (index
>= t
->temps_size
) {
4284 const int inc
= 4096;
4286 t
->temps
= (struct ureg_dst
*)
4288 (t
->temps_size
+ inc
) * sizeof(struct ureg_dst
));
4290 return ureg_dst_undef();
4292 memset(t
->temps
+ t
->temps_size
, 0, inc
* sizeof(struct ureg_dst
));
4293 t
->temps_size
+= inc
;
4296 if (ureg_dst_is_undef(t
->temps
[index
]))
4297 t
->temps
[index
] = ureg_DECL_local_temporary(t
->ureg
);
4299 return t
->temps
[index
];
4302 array
= index
>> 16;
4304 assert(array
< Elements(t
->arrays
));
4306 if (ureg_dst_is_undef(t
->arrays
[array
]))
4307 t
->arrays
[array
] = ureg_DECL_array_temporary(
4308 t
->ureg
, t
->array_sizes
[array
], TRUE
);
4310 return ureg_dst_array_offset(t
->arrays
[array
],
4311 (int)(index
& 0xFFFF) - 0x8000);
4313 case PROGRAM_OUTPUT
:
4314 if (t
->procType
== TGSI_PROCESSOR_VERTEX
)
4315 assert(index
< VARYING_SLOT_MAX
);
4316 else if (t
->procType
== TGSI_PROCESSOR_FRAGMENT
)
4317 assert(index
< FRAG_RESULT_MAX
);
4319 assert(index
< VARYING_SLOT_MAX
);
4321 assert(t
->outputMapping
[index
] < Elements(t
->outputs
));
4323 return t
->outputs
[t
->outputMapping
[index
]];
4325 case PROGRAM_ADDRESS
:
4326 return t
->address
[index
];
4329 assert(!"unknown dst register file");
4330 return ureg_dst_undef();
4335 * Map a glsl_to_tgsi src register to a TGSI ureg_src register.
4337 static struct ureg_src
4338 src_register(struct st_translate
*t
, const struct st_src_reg
*reg
)
4341 case PROGRAM_UNDEFINED
:
4342 return ureg_src_undef();
4344 case PROGRAM_TEMPORARY
:
4346 return ureg_src(dst_register(t
, reg
->file
, reg
->index
));
4348 case PROGRAM_UNIFORM
:
4349 assert(reg
->index
>= 0);
4350 return t
->constants
[reg
->index
];
4351 case PROGRAM_STATE_VAR
:
4352 case PROGRAM_CONSTANT
: /* ie, immediate */
4353 if (reg
->has_index2
)
4354 return ureg_src_register(TGSI_FILE_CONSTANT
, reg
->index
);
4355 else if (reg
->index
< 0)
4356 return ureg_DECL_constant(t
->ureg
, 0);
4358 return t
->constants
[reg
->index
];
4360 case PROGRAM_IMMEDIATE
:
4361 return t
->immediates
[reg
->index
];
4364 assert(t
->inputMapping
[reg
->index
] < Elements(t
->inputs
));
4365 return t
->inputs
[t
->inputMapping
[reg
->index
]];
4367 case PROGRAM_OUTPUT
:
4368 assert(t
->outputMapping
[reg
->index
] < Elements(t
->outputs
));
4369 return ureg_src(t
->outputs
[t
->outputMapping
[reg
->index
]]); /* not needed? */
4371 case PROGRAM_ADDRESS
:
4372 return ureg_src(t
->address
[reg
->index
]);
4374 case PROGRAM_SYSTEM_VALUE
:
4375 assert(reg
->index
< (int) Elements(t
->systemValues
));
4376 return t
->systemValues
[reg
->index
];
4379 assert(!"unknown src register file");
4380 return ureg_src_undef();
4385 * Create a TGSI ureg_dst register from an st_dst_reg.
4387 static struct ureg_dst
4388 translate_dst(struct st_translate
*t
,
4389 const st_dst_reg
*dst_reg
,
4390 bool saturate
, bool clamp_color
)
4392 struct ureg_dst dst
= dst_register(t
,
4396 dst
= ureg_writemask(dst
, dst_reg
->writemask
);
4399 dst
= ureg_saturate(dst
);
4400 else if (clamp_color
&& dst_reg
->file
== PROGRAM_OUTPUT
) {
4401 /* Clamp colors for ARB_color_buffer_float. */
4402 switch (t
->procType
) {
4403 case TGSI_PROCESSOR_VERTEX
:
4404 /* This can only occur with a compatibility profile, which doesn't
4405 * support geometry shaders. */
4406 if (dst_reg
->index
== VARYING_SLOT_COL0
||
4407 dst_reg
->index
== VARYING_SLOT_COL1
||
4408 dst_reg
->index
== VARYING_SLOT_BFC0
||
4409 dst_reg
->index
== VARYING_SLOT_BFC1
) {
4410 dst
= ureg_saturate(dst
);
4414 case TGSI_PROCESSOR_FRAGMENT
:
4415 if (dst_reg
->index
== FRAG_RESULT_COLOR
||
4416 dst_reg
->index
>= FRAG_RESULT_DATA0
) {
4417 dst
= ureg_saturate(dst
);
4423 if (dst_reg
->reladdr
!= NULL
) {
4424 assert(dst_reg
->file
!= PROGRAM_TEMPORARY
);
4425 dst
= ureg_dst_indirect(dst
, ureg_src(t
->address
[0]));
4432 * Create a TGSI ureg_src register from an st_src_reg.
4434 static struct ureg_src
4435 translate_src(struct st_translate
*t
, const st_src_reg
*src_reg
)
4437 struct ureg_src src
= src_register(t
, src_reg
);
4439 if (src_reg
->has_index2
) {
4440 /* 2D indexes occur with geometry shader inputs (attrib, vertex)
4441 * and UBO constant buffers (buffer, position).
4443 if (src_reg
->reladdr2
)
4444 src
= ureg_src_dimension_indirect(src
, ureg_src(t
->address
[1]),
4447 src
= ureg_src_dimension(src
, src_reg
->index2D
);
4450 src
= ureg_swizzle(src
,
4451 GET_SWZ(src_reg
->swizzle
, 0) & 0x3,
4452 GET_SWZ(src_reg
->swizzle
, 1) & 0x3,
4453 GET_SWZ(src_reg
->swizzle
, 2) & 0x3,
4454 GET_SWZ(src_reg
->swizzle
, 3) & 0x3);
4456 if ((src_reg
->negate
& 0xf) == NEGATE_XYZW
)
4457 src
= ureg_negate(src
);
4459 if (src_reg
->reladdr
!= NULL
) {
4460 assert(src_reg
->file
!= PROGRAM_TEMPORARY
);
4461 src
= ureg_src_indirect(src
, ureg_src(t
->address
[0]));
4467 static struct tgsi_texture_offset
4468 translate_tex_offset(struct st_translate
*t
,
4469 const st_src_reg
*in_offset
, int idx
)
4471 struct tgsi_texture_offset offset
;
4472 struct ureg_src imm_src
;
4473 struct ureg_dst dst
;
4476 switch (in_offset
->file
) {
4477 case PROGRAM_IMMEDIATE
:
4478 imm_src
= t
->immediates
[in_offset
->index
];
4480 offset
.File
= imm_src
.File
;
4481 offset
.Index
= imm_src
.Index
;
4482 offset
.SwizzleX
= imm_src
.SwizzleX
;
4483 offset
.SwizzleY
= imm_src
.SwizzleY
;
4484 offset
.SwizzleZ
= imm_src
.SwizzleZ
;
4487 case PROGRAM_TEMPORARY
:
4488 imm_src
= ureg_src(t
->temps
[in_offset
->index
]);
4489 offset
.File
= imm_src
.File
;
4490 offset
.Index
= imm_src
.Index
;
4491 offset
.SwizzleX
= GET_SWZ(in_offset
->swizzle
, 0);
4492 offset
.SwizzleY
= GET_SWZ(in_offset
->swizzle
, 1);
4493 offset
.SwizzleZ
= GET_SWZ(in_offset
->swizzle
, 2);
4497 array
= in_offset
->index
>> 16;
4500 assert(array
< (int) Elements(t
->arrays
));
4502 dst
= t
->arrays
[array
];
4503 offset
.File
= dst
.File
;
4504 offset
.Index
= dst
.Index
+ (in_offset
->index
& 0xFFFF) - 0x8000;
4505 offset
.SwizzleX
= GET_SWZ(in_offset
->swizzle
, 0);
4506 offset
.SwizzleY
= GET_SWZ(in_offset
->swizzle
, 1);
4507 offset
.SwizzleZ
= GET_SWZ(in_offset
->swizzle
, 2);
4517 compile_tgsi_instruction(struct st_translate
*t
,
4518 const glsl_to_tgsi_instruction
*inst
,
4519 bool clamp_dst_color_output
)
4521 struct ureg_program
*ureg
= t
->ureg
;
4523 struct ureg_dst dst
[1];
4524 struct ureg_src src
[4];
4525 struct tgsi_texture_offset texoffsets
[MAX_GLSL_TEXTURE_OFFSET
];
4529 unsigned tex_target
;
4531 num_dst
= num_inst_dst_regs(inst
->op
);
4532 num_src
= num_inst_src_regs(inst
->op
);
4535 dst
[0] = translate_dst(t
,
4538 clamp_dst_color_output
);
4540 for (i
= 0; i
< num_src
; i
++) {
4541 assert(inst
->src
[i
].file
!= PROGRAM_UNDEFINED
);
4542 src
[i
] = translate_src(t
, &inst
->src
[i
]);
4546 case TGSI_OPCODE_BGNLOOP
:
4547 case TGSI_OPCODE_CAL
:
4548 case TGSI_OPCODE_ELSE
:
4549 case TGSI_OPCODE_ENDLOOP
:
4550 case TGSI_OPCODE_IF
:
4551 case TGSI_OPCODE_UIF
:
4552 assert(num_dst
== 0);
4553 ureg_label_insn(ureg
,
4557 inst
->op
== TGSI_OPCODE_CAL
? inst
->function
->sig_id
: 0));
4560 case TGSI_OPCODE_TEX
:
4561 case TGSI_OPCODE_TXB
:
4562 case TGSI_OPCODE_TXD
:
4563 case TGSI_OPCODE_TXL
:
4564 case TGSI_OPCODE_TXP
:
4565 case TGSI_OPCODE_TXQ
:
4566 case TGSI_OPCODE_TXF
:
4567 case TGSI_OPCODE_TEX2
:
4568 case TGSI_OPCODE_TXB2
:
4569 case TGSI_OPCODE_TXL2
:
4570 case TGSI_OPCODE_TG4
:
4571 case TGSI_OPCODE_LODQ
:
4572 src
[num_src
] = t
->samplers
[inst
->sampler
.index
];
4573 assert(src
[num_src
].File
!= TGSI_FILE_NULL
);
4574 if (inst
->sampler
.reladdr
)
4576 ureg_src_indirect(src
[num_src
], ureg_src(t
->address
[2]));
4578 for (i
= 0; i
< inst
->tex_offset_num_offset
; i
++) {
4579 texoffsets
[i
] = translate_tex_offset(t
, &inst
->tex_offsets
[i
], i
);
4581 tex_target
= st_translate_texture_target(inst
->tex_target
, inst
->tex_shadow
);
4587 texoffsets
, inst
->tex_offset_num_offset
,
4591 case TGSI_OPCODE_SCS
:
4592 dst
[0] = ureg_writemask(dst
[0], TGSI_WRITEMASK_XY
);
4593 ureg_insn(ureg
, inst
->op
, dst
, num_dst
, src
, num_src
);
4606 * Emit the TGSI instructions for inverting and adjusting WPOS.
4607 * This code is unavoidable because it also depends on whether
4608 * a FBO is bound (STATE_FB_WPOS_Y_TRANSFORM).
4611 emit_wpos_adjustment( struct st_translate
*t
,
4612 const struct gl_program
*program
,
4614 GLfloat adjX
, GLfloat adjY
[2])
4616 struct ureg_program
*ureg
= t
->ureg
;
4618 /* Fragment program uses fragment position input.
4619 * Need to replace instances of INPUT[WPOS] with temp T
4620 * where T = INPUT[WPOS] by y is inverted.
4622 static const gl_state_index wposTransformState
[STATE_LENGTH
]
4623 = { STATE_INTERNAL
, STATE_FB_WPOS_Y_TRANSFORM
,
4624 (gl_state_index
)0, (gl_state_index
)0, (gl_state_index
)0 };
4626 /* XXX: note we are modifying the incoming shader here! Need to
4627 * do this before emitting the constant decls below, or this
4630 unsigned wposTransConst
= _mesa_add_state_reference(program
->Parameters
,
4631 wposTransformState
);
4633 struct ureg_src wpostrans
= ureg_DECL_constant( ureg
, wposTransConst
);
4634 struct ureg_dst wpos_temp
= ureg_DECL_temporary( ureg
);
4635 struct ureg_src wpos_input
= t
->inputs
[t
->inputMapping
[VARYING_SLOT_POS
]];
4637 /* First, apply the coordinate shift: */
4638 if (adjX
|| adjY
[0] || adjY
[1]) {
4639 if (adjY
[0] != adjY
[1]) {
4640 /* Adjust the y coordinate by adjY[1] or adjY[0] respectively
4641 * depending on whether inversion is actually going to be applied
4642 * or not, which is determined by testing against the inversion
4643 * state variable used below, which will be either +1 or -1.
4645 struct ureg_dst adj_temp
= ureg_DECL_local_temporary(ureg
);
4647 ureg_CMP(ureg
, adj_temp
,
4648 ureg_scalar(wpostrans
, invert
? 2 : 0),
4649 ureg_imm4f(ureg
, adjX
, adjY
[0], 0.0f
, 0.0f
),
4650 ureg_imm4f(ureg
, adjX
, adjY
[1], 0.0f
, 0.0f
));
4651 ureg_ADD(ureg
, wpos_temp
, wpos_input
, ureg_src(adj_temp
));
4653 ureg_ADD(ureg
, wpos_temp
, wpos_input
,
4654 ureg_imm4f(ureg
, adjX
, adjY
[0], 0.0f
, 0.0f
));
4656 wpos_input
= ureg_src(wpos_temp
);
4658 /* MOV wpos_temp, input[wpos]
4660 ureg_MOV( ureg
, wpos_temp
, wpos_input
);
4663 /* Now the conditional y flip: STATE_FB_WPOS_Y_TRANSFORM.xy/zw will be
4664 * inversion/identity, or the other way around if we're drawing to an FBO.
4667 /* MAD wpos_temp.y, wpos_input, wpostrans.xxxx, wpostrans.yyyy
4670 ureg_writemask(wpos_temp
, TGSI_WRITEMASK_Y
),
4672 ureg_scalar(wpostrans
, 0),
4673 ureg_scalar(wpostrans
, 1));
4675 /* MAD wpos_temp.y, wpos_input, wpostrans.zzzz, wpostrans.wwww
4678 ureg_writemask(wpos_temp
, TGSI_WRITEMASK_Y
),
4680 ureg_scalar(wpostrans
, 2),
4681 ureg_scalar(wpostrans
, 3));
4684 /* Use wpos_temp as position input from here on:
4686 t
->inputs
[t
->inputMapping
[VARYING_SLOT_POS
]] = ureg_src(wpos_temp
);
4691 * Emit fragment position/ooordinate code.
4694 emit_wpos(struct st_context
*st
,
4695 struct st_translate
*t
,
4696 const struct gl_program
*program
,
4697 struct ureg_program
*ureg
)
4699 const struct gl_fragment_program
*fp
=
4700 (const struct gl_fragment_program
*) program
;
4701 struct pipe_screen
*pscreen
= st
->pipe
->screen
;
4702 GLfloat adjX
= 0.0f
;
4703 GLfloat adjY
[2] = { 0.0f
, 0.0f
};
4704 boolean invert
= FALSE
;
4706 /* Query the pixel center conventions supported by the pipe driver and set
4707 * adjX, adjY to help out if it cannot handle the requested one internally.
4709 * The bias of the y-coordinate depends on whether y-inversion takes place
4710 * (adjY[1]) or not (adjY[0]), which is in turn dependent on whether we are
4711 * drawing to an FBO (causes additional inversion), and whether the the pipe
4712 * driver origin and the requested origin differ (the latter condition is
4713 * stored in the 'invert' variable).
4715 * For height = 100 (i = integer, h = half-integer, l = lower, u = upper):
4717 * center shift only:
4722 * l,i -> u,i: ( 0.0 + 1.0) * -1 + 100 = 99
4723 * l,h -> u,h: ( 0.5 + 0.0) * -1 + 100 = 99.5
4724 * u,i -> l,i: (99.0 + 1.0) * -1 + 100 = 0
4725 * u,h -> l,h: (99.5 + 0.0) * -1 + 100 = 0.5
4727 * inversion and center shift:
4728 * l,i -> u,h: ( 0.0 + 0.5) * -1 + 100 = 99.5
4729 * l,h -> u,i: ( 0.5 + 0.5) * -1 + 100 = 99
4730 * u,i -> l,h: (99.0 + 0.5) * -1 + 100 = 0.5
4731 * u,h -> l,i: (99.5 + 0.5) * -1 + 100 = 0
4733 if (fp
->OriginUpperLeft
) {
4734 /* Fragment shader wants origin in upper-left */
4735 if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT
)) {
4736 /* the driver supports upper-left origin */
4738 else if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT
)) {
4739 /* the driver supports lower-left origin, need to invert Y */
4740 ureg_property(ureg
, TGSI_PROPERTY_FS_COORD_ORIGIN
,
4741 TGSI_FS_COORD_ORIGIN_LOWER_LEFT
);
4748 /* Fragment shader wants origin in lower-left */
4749 if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT
))
4750 /* the driver supports lower-left origin */
4751 ureg_property(ureg
, TGSI_PROPERTY_FS_COORD_ORIGIN
,
4752 TGSI_FS_COORD_ORIGIN_LOWER_LEFT
);
4753 else if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT
))
4754 /* the driver supports upper-left origin, need to invert Y */
4760 if (fp
->PixelCenterInteger
) {
4761 /* Fragment shader wants pixel center integer */
4762 if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER
)) {
4763 /* the driver supports pixel center integer */
4765 ureg_property(ureg
, TGSI_PROPERTY_FS_COORD_PIXEL_CENTER
,
4766 TGSI_FS_COORD_PIXEL_CENTER_INTEGER
);
4768 else if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER
)) {
4769 /* the driver supports pixel center half integer, need to bias X,Y */
4778 /* Fragment shader wants pixel center half integer */
4779 if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER
)) {
4780 /* the driver supports pixel center half integer */
4782 else if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER
)) {
4783 /* the driver supports pixel center integer, need to bias X,Y */
4784 adjX
= adjY
[0] = adjY
[1] = 0.5f
;
4785 ureg_property(ureg
, TGSI_PROPERTY_FS_COORD_PIXEL_CENTER
,
4786 TGSI_FS_COORD_PIXEL_CENTER_INTEGER
);
4792 /* we invert after adjustment so that we avoid the MOV to temporary,
4793 * and reuse the adjustment ADD instead */
4794 emit_wpos_adjustment(t
, program
, invert
, adjX
, adjY
);
4798 * OpenGL's fragment gl_FrontFace input is 1 for front-facing, 0 for back.
4799 * TGSI uses +1 for front, -1 for back.
4800 * This function converts the TGSI value to the GL value. Simply clamping/
4801 * saturating the value to [0,1] does the job.
4804 emit_face_var(struct gl_context
*ctx
, struct st_translate
*t
)
4806 struct ureg_program
*ureg
= t
->ureg
;
4807 struct ureg_dst face_temp
= ureg_DECL_temporary(ureg
);
4808 struct ureg_src face_input
= t
->inputs
[t
->inputMapping
[VARYING_SLOT_FACE
]];
4810 if (ctx
->Const
.NativeIntegers
) {
4811 ureg_FSGE(ureg
, face_temp
, face_input
, ureg_imm1f(ureg
, 0));
4814 /* MOV_SAT face_temp, input[face] */
4815 ureg_MOV(ureg
, ureg_saturate(face_temp
), face_input
);
4818 /* Use face_temp as face input from here on: */
4819 t
->inputs
[t
->inputMapping
[VARYING_SLOT_FACE
]] = ureg_src(face_temp
);
4823 emit_edgeflags(struct st_translate
*t
)
4825 struct ureg_program
*ureg
= t
->ureg
;
4826 struct ureg_dst edge_dst
= t
->outputs
[t
->outputMapping
[VARYING_SLOT_EDGE
]];
4827 struct ureg_src edge_src
= t
->inputs
[t
->inputMapping
[VERT_ATTRIB_EDGEFLAG
]];
4829 ureg_MOV(ureg
, edge_dst
, edge_src
);
4833 * Translate intermediate IR (glsl_to_tgsi_instruction) to TGSI format.
4834 * \param program the program to translate
4835 * \param numInputs number of input registers used
4836 * \param inputMapping maps Mesa fragment program inputs to TGSI generic
4838 * \param inputSemanticName the TGSI_SEMANTIC flag for each input
4839 * \param inputSemanticIndex the semantic index (ex: which texcoord) for
4841 * \param interpMode the TGSI_INTERPOLATE_LINEAR/PERSP mode for each input
4842 * \param interpLocation the TGSI_INTERPOLATE_LOC_* location for each input
4843 * \param numOutputs number of output registers used
4844 * \param outputMapping maps Mesa fragment program outputs to TGSI
4846 * \param outputSemanticName the TGSI_SEMANTIC flag for each output
4847 * \param outputSemanticIndex the semantic index (ex: which texcoord) for
4850 * \return PIPE_OK or PIPE_ERROR_OUT_OF_MEMORY
4852 extern "C" enum pipe_error
4853 st_translate_program(
4854 struct gl_context
*ctx
,
4856 struct ureg_program
*ureg
,
4857 glsl_to_tgsi_visitor
*program
,
4858 const struct gl_program
*proginfo
,
4860 const GLuint inputMapping
[],
4861 const ubyte inputSemanticName
[],
4862 const ubyte inputSemanticIndex
[],
4863 const GLuint interpMode
[],
4864 const GLuint interpLocation
[],
4866 const GLuint outputMapping
[],
4867 const ubyte outputSemanticName
[],
4868 const ubyte outputSemanticIndex
[],
4869 boolean passthrough_edgeflags
,
4870 boolean clamp_color
)
4872 struct st_translate
*t
;
4874 enum pipe_error ret
= PIPE_OK
;
4876 assert(numInputs
<= Elements(t
->inputs
));
4877 assert(numOutputs
<= Elements(t
->outputs
));
4879 assert(_mesa_sysval_to_semantic
[SYSTEM_VALUE_FRONT_FACE
] ==
4880 TGSI_SEMANTIC_FACE
);
4881 assert(_mesa_sysval_to_semantic
[SYSTEM_VALUE_VERTEX_ID
] ==
4882 TGSI_SEMANTIC_VERTEXID
);
4883 assert(_mesa_sysval_to_semantic
[SYSTEM_VALUE_INSTANCE_ID
] ==
4884 TGSI_SEMANTIC_INSTANCEID
);
4885 assert(_mesa_sysval_to_semantic
[SYSTEM_VALUE_SAMPLE_ID
] ==
4886 TGSI_SEMANTIC_SAMPLEID
);
4887 assert(_mesa_sysval_to_semantic
[SYSTEM_VALUE_SAMPLE_POS
] ==
4888 TGSI_SEMANTIC_SAMPLEPOS
);
4889 assert(_mesa_sysval_to_semantic
[SYSTEM_VALUE_SAMPLE_MASK_IN
] ==
4890 TGSI_SEMANTIC_SAMPLEMASK
);
4891 assert(_mesa_sysval_to_semantic
[SYSTEM_VALUE_INVOCATION_ID
] ==
4892 TGSI_SEMANTIC_INVOCATIONID
);
4893 assert(_mesa_sysval_to_semantic
[SYSTEM_VALUE_VERTEX_ID_ZERO_BASE
] ==
4894 TGSI_SEMANTIC_VERTEXID_NOBASE
);
4895 assert(_mesa_sysval_to_semantic
[SYSTEM_VALUE_BASE_VERTEX
] ==
4896 TGSI_SEMANTIC_BASEVERTEX
);
4898 t
= CALLOC_STRUCT(st_translate
);
4900 ret
= PIPE_ERROR_OUT_OF_MEMORY
;
4904 memset(t
, 0, sizeof *t
);
4906 t
->procType
= procType
;
4907 t
->inputMapping
= inputMapping
;
4908 t
->outputMapping
= outputMapping
;
4911 if (program
->shader_program
) {
4912 for (i
= 0; i
< program
->shader_program
->NumUserUniformStorage
; i
++) {
4913 struct gl_uniform_storage
*const storage
=
4914 &program
->shader_program
->UniformStorage
[i
];
4916 _mesa_uniform_detach_all_driver_storage(storage
);
4921 * Declare input attributes.
4923 if (procType
== TGSI_PROCESSOR_FRAGMENT
) {
4924 for (i
= 0; i
< numInputs
; i
++) {
4925 t
->inputs
[i
] = ureg_DECL_fs_input_cyl_centroid(ureg
,
4926 inputSemanticName
[i
],
4927 inputSemanticIndex
[i
],
4932 if (proginfo
->InputsRead
& VARYING_BIT_POS
) {
4933 /* Must do this after setting up t->inputs, and before
4934 * emitting constant references, below:
4936 emit_wpos(st_context(ctx
), t
, proginfo
, ureg
);
4939 if (proginfo
->InputsRead
& VARYING_BIT_FACE
)
4940 emit_face_var(ctx
, t
);
4943 * Declare output attributes.
4945 for (i
= 0; i
< numOutputs
; i
++) {
4946 switch (outputSemanticName
[i
]) {
4947 case TGSI_SEMANTIC_POSITION
:
4948 t
->outputs
[i
] = ureg_DECL_output(ureg
,
4949 TGSI_SEMANTIC_POSITION
, /* Z/Depth */
4950 outputSemanticIndex
[i
]);
4951 t
->outputs
[i
] = ureg_writemask(t
->outputs
[i
], TGSI_WRITEMASK_Z
);
4953 case TGSI_SEMANTIC_STENCIL
:
4954 t
->outputs
[i
] = ureg_DECL_output(ureg
,
4955 TGSI_SEMANTIC_STENCIL
, /* Stencil */
4956 outputSemanticIndex
[i
]);
4957 t
->outputs
[i
] = ureg_writemask(t
->outputs
[i
], TGSI_WRITEMASK_Y
);
4959 case TGSI_SEMANTIC_COLOR
:
4960 t
->outputs
[i
] = ureg_DECL_output(ureg
,
4961 TGSI_SEMANTIC_COLOR
,
4962 outputSemanticIndex
[i
]);
4964 case TGSI_SEMANTIC_SAMPLEMASK
:
4965 t
->outputs
[i
] = ureg_DECL_output(ureg
,
4966 TGSI_SEMANTIC_SAMPLEMASK
,
4967 outputSemanticIndex
[i
]);
4968 /* TODO: If we ever support more than 32 samples, this will have
4969 * to become an array.
4971 t
->outputs
[i
] = ureg_writemask(t
->outputs
[i
], TGSI_WRITEMASK_X
);
4974 assert(!"fragment shader outputs must be POSITION/STENCIL/COLOR");
4975 ret
= PIPE_ERROR_BAD_INPUT
;
4980 else if (procType
== TGSI_PROCESSOR_GEOMETRY
) {
4981 for (i
= 0; i
< numInputs
; i
++) {
4982 t
->inputs
[i
] = ureg_DECL_gs_input(ureg
,
4984 inputSemanticName
[i
],
4985 inputSemanticIndex
[i
]);
4988 for (i
= 0; i
< numOutputs
; i
++) {
4989 t
->outputs
[i
] = ureg_DECL_output(ureg
,
4990 outputSemanticName
[i
],
4991 outputSemanticIndex
[i
]);
4995 assert(procType
== TGSI_PROCESSOR_VERTEX
);
4997 for (i
= 0; i
< numInputs
; i
++) {
4998 t
->inputs
[i
] = ureg_DECL_vs_input(ureg
, i
);
5001 for (i
= 0; i
< numOutputs
; i
++) {
5002 t
->outputs
[i
] = ureg_DECL_output(ureg
,
5003 outputSemanticName
[i
],
5004 outputSemanticIndex
[i
]);
5005 if (outputSemanticName
[i
] == TGSI_SEMANTIC_FOG
) {
5006 /* force register to contain a fog coordinate in the form (F, 0, 0, 1). */
5008 ureg_writemask(t
->outputs
[i
], TGSI_WRITEMASK_YZW
),
5009 ureg_imm4f(ureg
, 0.0f
, 0.0f
, 0.0f
, 1.0f
));
5010 t
->outputs
[i
] = ureg_writemask(t
->outputs
[i
], TGSI_WRITEMASK_X
);
5013 if (passthrough_edgeflags
)
5017 /* Declare address register.
5019 if (program
->num_address_regs
> 0) {
5020 assert(program
->num_address_regs
<= 3);
5021 for (int i
= 0; i
< program
->num_address_regs
; i
++)
5022 t
->address
[i
] = ureg_DECL_address(ureg
);
5025 /* Declare misc input registers
5028 GLbitfield sysInputs
= proginfo
->SystemValuesRead
;
5029 unsigned numSys
= 0;
5030 for (i
= 0; sysInputs
; i
++) {
5031 if (sysInputs
& (1 << i
)) {
5032 unsigned semName
= _mesa_sysval_to_semantic
[i
];
5033 t
->systemValues
[i
] = ureg_DECL_system_value(ureg
, numSys
, semName
, 0);
5034 if (semName
== TGSI_SEMANTIC_INSTANCEID
||
5035 semName
== TGSI_SEMANTIC_VERTEXID
) {
5036 /* From Gallium perspective, these system values are always
5037 * integer, and require native integer support. However, if
5038 * native integer is supported on the vertex stage but not the
5039 * pixel stage (e.g, i915g + draw), Mesa will generate IR that
5040 * assumes these system values are floats. To resolve the
5041 * inconsistency, we insert a U2F.
5043 struct st_context
*st
= st_context(ctx
);
5044 struct pipe_screen
*pscreen
= st
->pipe
->screen
;
5045 assert(procType
== TGSI_PROCESSOR_VERTEX
);
5046 assert(pscreen
->get_shader_param(pscreen
, PIPE_SHADER_VERTEX
, PIPE_SHADER_CAP_INTEGERS
));
5047 if (!ctx
->Const
.NativeIntegers
) {
5048 struct ureg_dst temp
= ureg_DECL_local_temporary(t
->ureg
);
5049 ureg_U2F( t
->ureg
, ureg_writemask(temp
, TGSI_WRITEMASK_X
), t
->systemValues
[i
]);
5050 t
->systemValues
[i
] = ureg_scalar(ureg_src(temp
), 0);
5054 sysInputs
&= ~(1 << i
);
5059 /* Copy over array sizes
5061 memcpy(t
->array_sizes
, program
->array_sizes
, sizeof(unsigned) * program
->next_array
);
5063 /* Emit constants and uniforms. TGSI uses a single index space for these,
5064 * so we put all the translated regs in t->constants.
5066 if (proginfo
->Parameters
) {
5067 t
->constants
= (struct ureg_src
*)
5068 calloc(proginfo
->Parameters
->NumParameters
, sizeof(t
->constants
[0]));
5069 if (t
->constants
== NULL
) {
5070 ret
= PIPE_ERROR_OUT_OF_MEMORY
;
5074 for (i
= 0; i
< proginfo
->Parameters
->NumParameters
; i
++) {
5075 switch (proginfo
->Parameters
->Parameters
[i
].Type
) {
5076 case PROGRAM_STATE_VAR
:
5077 case PROGRAM_UNIFORM
:
5078 t
->constants
[i
] = ureg_DECL_constant(ureg
, i
);
5081 /* Emit immediates for PROGRAM_CONSTANT only when there's no indirect
5082 * addressing of the const buffer.
5083 * FIXME: Be smarter and recognize param arrays:
5084 * indirect addressing is only valid within the referenced
5087 case PROGRAM_CONSTANT
:
5088 if (program
->indirect_addr_consts
)
5089 t
->constants
[i
] = ureg_DECL_constant(ureg
, i
);
5091 t
->constants
[i
] = emit_immediate(t
,
5092 proginfo
->Parameters
->ParameterValues
[i
],
5093 proginfo
->Parameters
->Parameters
[i
].DataType
,
5102 if (program
->shader
) {
5103 unsigned num_ubos
= program
->shader
->NumUniformBlocks
;
5105 for (i
= 0; i
< num_ubos
; i
++) {
5106 unsigned size
= program
->shader
->UniformBlocks
[i
].UniformBufferSize
;
5107 unsigned num_const_vecs
= (size
+ 15) / 16;
5108 unsigned first
, last
;
5109 assert(num_const_vecs
> 0);
5111 last
= num_const_vecs
> 0 ? num_const_vecs
- 1 : 0;
5112 ureg_DECL_constant2D(t
->ureg
, first
, last
, i
+ 1);
5116 /* Emit immediate values.
5118 t
->immediates
= (struct ureg_src
*)
5119 calloc(program
->num_immediates
, sizeof(struct ureg_src
));
5120 if (t
->immediates
== NULL
) {
5121 ret
= PIPE_ERROR_OUT_OF_MEMORY
;
5125 foreach_in_list(immediate_storage
, imm
, &program
->immediates
) {
5126 assert(i
< program
->num_immediates
);
5127 t
->immediates
[i
++] = emit_immediate(t
, imm
->values
, imm
->type
, imm
->size
);
5129 assert(i
== program
->num_immediates
);
5131 /* texture samplers */
5132 for (i
= 0; i
< ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
; i
++) {
5133 if (program
->samplers_used
& (1 << i
)) {
5134 t
->samplers
[i
] = ureg_DECL_sampler(ureg
, i
);
5138 /* Emit each instruction in turn:
5140 foreach_in_list(glsl_to_tgsi_instruction
, inst
, &program
->instructions
) {
5141 set_insn_start(t
, ureg_get_instruction_number(ureg
));
5142 compile_tgsi_instruction(t
, inst
, clamp_color
);
5145 /* Fix up all emitted labels:
5147 for (i
= 0; i
< t
->labels_count
; i
++) {
5148 ureg_fixup_label(ureg
, t
->labels
[i
].token
,
5149 t
->insn
[t
->labels
[i
].branch_target
]);
5152 if (program
->shader_program
) {
5153 /* This has to be done last. Any operation the can cause
5154 * prog->ParameterValues to get reallocated (e.g., anything that adds a
5155 * program constant) has to happen before creating this linkage.
5157 for (unsigned i
= 0; i
< MESA_SHADER_STAGES
; i
++) {
5158 if (program
->shader_program
->_LinkedShaders
[i
] == NULL
)
5161 _mesa_associate_uniform_storage(ctx
, program
->shader_program
,
5162 program
->shader_program
->_LinkedShaders
[i
]->Program
->Parameters
);
5172 free(t
->immediates
);
5175 debug_printf("%s: translate error flag set\n", __FUNCTION__
);
5183 /* ----------------------------- End TGSI code ------------------------------ */
5187 shader_stage_to_ptarget(gl_shader_stage stage
)
5190 case MESA_SHADER_VERTEX
:
5191 return PIPE_SHADER_VERTEX
;
5192 case MESA_SHADER_FRAGMENT
:
5193 return PIPE_SHADER_FRAGMENT
;
5194 case MESA_SHADER_GEOMETRY
:
5195 return PIPE_SHADER_GEOMETRY
;
5196 case MESA_SHADER_COMPUTE
:
5197 return PIPE_SHADER_COMPUTE
;
5200 assert(!"should not be reached");
5201 return PIPE_SHADER_VERTEX
;
5206 * Convert a shader's GLSL IR into a Mesa gl_program, although without
5207 * generating Mesa IR.
5209 static struct gl_program
*
5210 get_mesa_program(struct gl_context
*ctx
,
5211 struct gl_shader_program
*shader_program
,
5212 struct gl_shader
*shader
)
5214 glsl_to_tgsi_visitor
* v
;
5215 struct gl_program
*prog
;
5216 GLenum target
= _mesa_shader_stage_to_program(shader
->Stage
);
5218 struct gl_shader_compiler_options
*options
=
5219 &ctx
->Const
.ShaderCompilerOptions
[_mesa_shader_enum_to_shader_stage(shader
->Type
)];
5220 struct pipe_screen
*pscreen
= ctx
->st
->pipe
->screen
;
5221 unsigned ptarget
= shader_stage_to_ptarget(shader
->Stage
);
5223 validate_ir_tree(shader
->ir
);
5225 prog
= ctx
->Driver
.NewProgram(ctx
, target
, shader_program
->Name
);
5228 prog
->Parameters
= _mesa_new_parameter_list();
5229 v
= new glsl_to_tgsi_visitor();
5232 v
->shader_program
= shader_program
;
5234 v
->options
= options
;
5235 v
->glsl_version
= ctx
->Const
.GLSLVersion
;
5236 v
->native_integers
= ctx
->Const
.NativeIntegers
;
5238 v
->have_sqrt
= pscreen
->get_shader_param(pscreen
, ptarget
,
5239 PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED
);
5241 _mesa_copy_linked_program_data(shader
->Stage
, shader_program
, prog
);
5242 _mesa_generate_parameters_list_for_uniforms(shader_program
, shader
,
5245 /* Remove reads from output registers. */
5246 lower_output_reads(shader
->ir
);
5248 /* Emit intermediate IR for main(). */
5249 visit_exec_list(shader
->ir
, v
);
5251 /* Now emit bodies for any functions that were used. */
5253 progress
= GL_FALSE
;
5255 foreach_in_list(function_entry
, entry
, &v
->function_signatures
) {
5256 if (!entry
->bgn_inst
) {
5257 v
->current_function
= entry
;
5259 entry
->bgn_inst
= v
->emit(NULL
, TGSI_OPCODE_BGNSUB
);
5260 entry
->bgn_inst
->function
= entry
;
5262 visit_exec_list(&entry
->sig
->body
, v
);
5264 glsl_to_tgsi_instruction
*last
;
5265 last
= (glsl_to_tgsi_instruction
*)v
->instructions
.get_tail();
5266 if (last
->op
!= TGSI_OPCODE_RET
)
5267 v
->emit(NULL
, TGSI_OPCODE_RET
);
5269 glsl_to_tgsi_instruction
*end
;
5270 end
= v
->emit(NULL
, TGSI_OPCODE_ENDSUB
);
5271 end
->function
= entry
;
5279 /* Print out some information (for debugging purposes) used by the
5280 * optimization passes. */
5281 for (i
= 0; i
< v
->next_temp
; i
++) {
5282 int fr
= v
->get_first_temp_read(i
);
5283 int fw
= v
->get_first_temp_write(i
);
5284 int lr
= v
->get_last_temp_read(i
);
5285 int lw
= v
->get_last_temp_write(i
);
5287 printf("Temp %d: FR=%3d FW=%3d LR=%3d LW=%3d\n", i
, fr
, fw
, lr
, lw
);
5292 /* Perform optimizations on the instructions in the glsl_to_tgsi_visitor. */
5294 v
->copy_propagate();
5295 while (v
->eliminate_dead_code());
5297 v
->merge_registers();
5298 v
->renumber_registers();
5300 /* Write the END instruction. */
5301 v
->emit(NULL
, TGSI_OPCODE_END
);
5303 if (ctx
->_Shader
->Flags
& GLSL_DUMP
) {
5305 printf("GLSL IR for linked %s program %d:\n",
5306 _mesa_shader_stage_to_string(shader
->Stage
),
5307 shader_program
->Name
);
5308 _mesa_print_ir(stdout
, shader
->ir
, NULL
);
5314 prog
->Instructions
= NULL
;
5315 prog
->NumInstructions
= 0;
5317 do_set_program_inouts(shader
->ir
, prog
, shader
->Stage
);
5318 count_resources(v
, prog
);
5320 _mesa_reference_program(ctx
, &shader
->Program
, prog
);
5322 /* This has to be done last. Any operation the can cause
5323 * prog->ParameterValues to get reallocated (e.g., anything that adds a
5324 * program constant) has to happen before creating this linkage.
5326 _mesa_associate_uniform_storage(ctx
, shader_program
, prog
->Parameters
);
5327 if (!shader_program
->LinkStatus
) {
5331 struct st_vertex_program
*stvp
;
5332 struct st_fragment_program
*stfp
;
5333 struct st_geometry_program
*stgp
;
5335 switch (shader
->Type
) {
5336 case GL_VERTEX_SHADER
:
5337 stvp
= (struct st_vertex_program
*)prog
;
5338 stvp
->glsl_to_tgsi
= v
;
5340 case GL_FRAGMENT_SHADER
:
5341 stfp
= (struct st_fragment_program
*)prog
;
5342 stfp
->glsl_to_tgsi
= v
;
5344 case GL_GEOMETRY_SHADER
:
5345 stgp
= (struct st_geometry_program
*)prog
;
5346 stgp
->glsl_to_tgsi
= v
;
5349 assert(!"should not be reached");
5360 * Called via ctx->Driver.LinkShader()
5361 * This actually involves converting GLSL IR into an intermediate TGSI-like IR
5362 * with code lowering and other optimizations.
5365 st_link_shader(struct gl_context
*ctx
, struct gl_shader_program
*prog
)
5367 struct pipe_screen
*pscreen
= ctx
->st
->pipe
->screen
;
5368 assert(prog
->LinkStatus
);
5370 for (unsigned i
= 0; i
< MESA_SHADER_STAGES
; i
++) {
5371 if (prog
->_LinkedShaders
[i
] == NULL
)
5375 exec_list
*ir
= prog
->_LinkedShaders
[i
]->ir
;
5376 const struct gl_shader_compiler_options
*options
=
5377 &ctx
->Const
.ShaderCompilerOptions
[_mesa_shader_enum_to_shader_stage(prog
->_LinkedShaders
[i
]->Type
)];
5379 /* If there are forms of indirect addressing that the driver
5380 * cannot handle, perform the lowering pass.
5382 if (options
->EmitNoIndirectInput
|| options
->EmitNoIndirectOutput
||
5383 options
->EmitNoIndirectTemp
|| options
->EmitNoIndirectUniform
) {
5384 lower_variable_index_to_cond_assign(ir
,
5385 options
->EmitNoIndirectInput
,
5386 options
->EmitNoIndirectOutput
,
5387 options
->EmitNoIndirectTemp
,
5388 options
->EmitNoIndirectUniform
);
5391 if (ctx
->Extensions
.ARB_shading_language_packing
) {
5392 unsigned lower_inst
= LOWER_PACK_SNORM_2x16
|
5393 LOWER_UNPACK_SNORM_2x16
|
5394 LOWER_PACK_UNORM_2x16
|
5395 LOWER_UNPACK_UNORM_2x16
|
5396 LOWER_PACK_SNORM_4x8
|
5397 LOWER_UNPACK_SNORM_4x8
|
5398 LOWER_UNPACK_UNORM_4x8
|
5399 LOWER_PACK_UNORM_4x8
|
5400 LOWER_PACK_HALF_2x16
|
5401 LOWER_UNPACK_HALF_2x16
;
5403 lower_packing_builtins(ir
, lower_inst
);
5406 if (!pscreen
->get_param(pscreen
, PIPE_CAP_TEXTURE_GATHER_OFFSETS
))
5407 lower_offset_arrays(ir
);
5408 do_mat_op_to_vec(ir
);
5409 lower_instructions(ir
,
5417 (options
->EmitNoPow
? POW_TO_EXP2
: 0) |
5418 (!ctx
->Const
.NativeIntegers
? INT_DIV_TO_MUL_RCP
: 0) |
5419 (options
->EmitNoSat
? SAT_TO_CLAMP
: 0));
5421 lower_ubo_reference(prog
->_LinkedShaders
[i
], ir
);
5422 do_vec_index_to_cond_assign(ir
);
5423 lower_vector_insert(ir
, true);
5424 lower_quadop_vector(ir
, false);
5426 if (options
->MaxIfDepth
== 0) {
5433 progress
= do_lower_jumps(ir
, true, true, options
->EmitNoMainReturn
, options
->EmitNoCont
, options
->EmitNoLoops
) || progress
;
5435 progress
= do_common_optimization(ir
, true, true, options
,
5436 ctx
->Const
.NativeIntegers
)
5439 progress
= lower_if_to_cond_assign(ir
, options
->MaxIfDepth
) || progress
;
5443 validate_ir_tree(ir
);
5446 for (unsigned i
= 0; i
< MESA_SHADER_STAGES
; i
++) {
5447 struct gl_program
*linked_prog
;
5449 if (prog
->_LinkedShaders
[i
] == NULL
)
5452 linked_prog
= get_mesa_program(ctx
, prog
, prog
->_LinkedShaders
[i
]);
5455 _mesa_reference_program(ctx
, &prog
->_LinkedShaders
[i
]->Program
,
5457 if (!ctx
->Driver
.ProgramStringNotify(ctx
,
5458 _mesa_shader_stage_to_program(i
),
5460 _mesa_reference_program(ctx
, &prog
->_LinkedShaders
[i
]->Program
,
5462 _mesa_reference_program(ctx
, &linked_prog
, NULL
);
5467 _mesa_reference_program(ctx
, &linked_prog
, NULL
);
5474 st_translate_stream_output_info(glsl_to_tgsi_visitor
*glsl_to_tgsi
,
5475 const GLuint outputMapping
[],
5476 struct pipe_stream_output_info
*so
)
5479 struct gl_transform_feedback_info
*info
=
5480 &glsl_to_tgsi
->shader_program
->LinkedTransformFeedback
;
5482 for (i
= 0; i
< info
->NumOutputs
; i
++) {
5483 so
->output
[i
].register_index
=
5484 outputMapping
[info
->Outputs
[i
].OutputRegister
];
5485 so
->output
[i
].start_component
= info
->Outputs
[i
].ComponentOffset
;
5486 so
->output
[i
].num_components
= info
->Outputs
[i
].NumComponents
;
5487 so
->output
[i
].output_buffer
= info
->Outputs
[i
].OutputBuffer
;
5488 so
->output
[i
].dst_offset
= info
->Outputs
[i
].DstOffset
;
5489 so
->output
[i
].stream
= info
->Outputs
[i
].StreamId
;
5492 for (i
= 0; i
< PIPE_MAX_SO_BUFFERS
; i
++) {
5493 so
->stride
[i
] = info
->BufferStride
[i
];
5495 so
->num_outputs
= info
->NumOutputs
;