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
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8 * copy of this software and associated documentation files (the "Software"),
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19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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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_print_visitor.h"
38 #include "ir_expression_flattening.h"
39 #include "glsl_types.h"
40 #include "glsl_parser_extras.h"
41 #include "../glsl/program.h"
42 #include "ir_optimization.h"
46 #include "main/mtypes.h"
47 #include "main/shaderapi.h"
48 #include "main/shaderobj.h"
49 #include "main/uniforms.h"
50 #include "program/hash_table.h"
51 #include "program/prog_instruction.h"
52 #include "program/prog_optimize.h"
53 #include "program/prog_print.h"
54 #include "program/program.h"
55 #include "program/prog_uniform.h"
56 #include "program/prog_parameter.h"
57 #include "program/sampler.h"
59 #include "pipe/p_compiler.h"
60 #include "pipe/p_context.h"
61 #include "pipe/p_screen.h"
62 #include "pipe/p_shader_tokens.h"
63 #include "pipe/p_state.h"
64 #include "util/u_math.h"
65 #include "tgsi/tgsi_ureg.h"
66 #include "tgsi/tgsi_info.h"
67 #include "st_context.h"
68 #include "st_program.h"
69 #include "st_glsl_to_tgsi.h"
70 #include "st_mesa_to_tgsi.h"
73 #define PROGRAM_IMMEDIATE PROGRAM_FILE_MAX
74 #define PROGRAM_ANY_CONST ((1 << PROGRAM_LOCAL_PARAM) | \
75 (1 << PROGRAM_ENV_PARAM) | \
76 (1 << PROGRAM_STATE_VAR) | \
77 (1 << PROGRAM_NAMED_PARAM) | \
78 (1 << PROGRAM_CONSTANT) | \
79 (1 << PROGRAM_UNIFORM))
81 #define MAX_TEMPS 4096
86 static int swizzle_for_size(int size
);
89 * This struct is a corresponding struct to TGSI ureg_src.
93 st_src_reg(gl_register_file file
, int index
, const glsl_type
*type
)
97 if (type
&& (type
->is_scalar() || type
->is_vector() || type
->is_matrix()))
98 this->swizzle
= swizzle_for_size(type
->vector_elements
);
100 this->swizzle
= SWIZZLE_XYZW
;
102 this->type
= type
? type
->base_type
: GLSL_TYPE_ERROR
;
103 this->reladdr
= NULL
;
106 st_src_reg(gl_register_file file
, int index
, int type
)
111 this->swizzle
= SWIZZLE_XYZW
;
113 this->reladdr
= NULL
;
118 this->type
= GLSL_TYPE_ERROR
;
119 this->file
= PROGRAM_UNDEFINED
;
123 this->reladdr
= NULL
;
126 explicit st_src_reg(st_dst_reg reg
);
128 gl_register_file file
; /**< PROGRAM_* from Mesa */
129 int index
; /**< temporary index, VERT_ATTRIB_*, FRAG_ATTRIB_*, etc. */
130 GLuint swizzle
; /**< SWIZZLE_XYZWONEZERO swizzles from Mesa. */
131 int negate
; /**< NEGATE_XYZW mask from mesa */
132 int type
; /** GLSL_TYPE_* from GLSL IR (enum glsl_base_type) */
133 /** Register index should be offset by the integer in this reg. */
139 st_dst_reg(gl_register_file file
, int writemask
, int type
)
143 this->writemask
= writemask
;
144 this->cond_mask
= COND_TR
;
145 this->reladdr
= NULL
;
151 this->type
= GLSL_TYPE_ERROR
;
152 this->file
= PROGRAM_UNDEFINED
;
155 this->cond_mask
= COND_TR
;
156 this->reladdr
= NULL
;
159 explicit st_dst_reg(st_src_reg reg
);
161 gl_register_file file
; /**< PROGRAM_* from Mesa */
162 int index
; /**< temporary index, VERT_ATTRIB_*, FRAG_ATTRIB_*, etc. */
163 int writemask
; /**< Bitfield of WRITEMASK_[XYZW] */
165 int type
; /** GLSL_TYPE_* from GLSL IR (enum glsl_base_type) */
166 /** Register index should be offset by the integer in this reg. */
170 st_src_reg::st_src_reg(st_dst_reg reg
)
172 this->type
= reg
.type
;
173 this->file
= reg
.file
;
174 this->index
= reg
.index
;
175 this->swizzle
= SWIZZLE_XYZW
;
177 this->reladdr
= reg
.reladdr
;
180 st_dst_reg::st_dst_reg(st_src_reg reg
)
182 this->type
= reg
.type
;
183 this->file
= reg
.file
;
184 this->index
= reg
.index
;
185 this->writemask
= WRITEMASK_XYZW
;
186 this->cond_mask
= COND_TR
;
187 this->reladdr
= reg
.reladdr
;
190 class glsl_to_tgsi_instruction
: public exec_node
{
192 /* Callers of this ralloc-based new need not call delete. It's
193 * easier to just ralloc_free 'ctx' (or any of its ancestors). */
194 static void* operator new(size_t size
, void *ctx
)
198 node
= rzalloc_size(ctx
, size
);
199 assert(node
!= NULL
);
207 /** Pointer to the ir source this tree came from for debugging */
209 GLboolean cond_update
;
211 int sampler
; /**< sampler index */
212 int tex_target
; /**< One of TEXTURE_*_INDEX */
213 GLboolean tex_shadow
;
214 int dead_mask
; /**< Used in dead code elimination */
216 class function_entry
*function
; /* Set on TGSI_OPCODE_CAL or TGSI_OPCODE_BGNSUB */
219 class variable_storage
: public exec_node
{
221 variable_storage(ir_variable
*var
, gl_register_file file
, int index
)
222 : file(file
), index(index
), var(var
)
227 gl_register_file file
;
229 ir_variable
*var
; /* variable that maps to this, if any */
232 class immediate_storage
: public exec_node
{
234 immediate_storage(gl_constant_value
*values
, int size
, int type
)
236 memcpy(this->values
, values
, size
* sizeof(gl_constant_value
));
241 gl_constant_value values
[4];
242 int size
; /**< Number of components (1-4) */
243 int type
; /**< GL_FLOAT, GL_INT, GL_BOOL, or GL_UNSIGNED_INT */
246 class function_entry
: public exec_node
{
248 ir_function_signature
*sig
;
251 * identifier of this function signature used by the program.
253 * At the point that TGSI instructions for function calls are
254 * generated, we don't know the address of the first instruction of
255 * the function body. So we make the BranchTarget that is called a
256 * small integer and rewrite them during set_branchtargets().
261 * Pointer to first instruction of the function body.
263 * Set during function body emits after main() is processed.
265 glsl_to_tgsi_instruction
*bgn_inst
;
268 * Index of the first instruction of the function body in actual TGSI.
270 * Set after conversion from glsl_to_tgsi_instruction to TGSI.
274 /** Storage for the return value. */
275 st_src_reg return_reg
;
278 class glsl_to_tgsi_visitor
: public ir_visitor
{
280 glsl_to_tgsi_visitor();
281 ~glsl_to_tgsi_visitor();
283 function_entry
*current_function
;
285 struct gl_context
*ctx
;
286 struct gl_program
*prog
;
287 struct gl_shader_program
*shader_program
;
288 struct gl_shader_compiler_options
*options
;
292 int num_address_regs
;
294 bool indirect_addr_temps
;
295 bool indirect_addr_consts
;
299 variable_storage
*find_variable_storage(ir_variable
*var
);
301 int add_constant(gl_register_file file
, gl_constant_value values
[4],
302 int size
, int datatype
, GLuint
*swizzle_out
);
304 function_entry
*get_function_signature(ir_function_signature
*sig
);
306 st_src_reg
get_temp(const glsl_type
*type
);
307 void reladdr_to_temp(ir_instruction
*ir
, st_src_reg
*reg
, int *num_reladdr
);
309 st_src_reg
st_src_reg_for_float(float val
);
310 st_src_reg
st_src_reg_for_int(int val
);
311 st_src_reg
st_src_reg_for_type(int type
, int val
);
314 * \name Visit methods
316 * As typical for the visitor pattern, there must be one \c visit method for
317 * each concrete subclass of \c ir_instruction. Virtual base classes within
318 * the hierarchy should not have \c visit methods.
321 virtual void visit(ir_variable
*);
322 virtual void visit(ir_loop
*);
323 virtual void visit(ir_loop_jump
*);
324 virtual void visit(ir_function_signature
*);
325 virtual void visit(ir_function
*);
326 virtual void visit(ir_expression
*);
327 virtual void visit(ir_swizzle
*);
328 virtual void visit(ir_dereference_variable
*);
329 virtual void visit(ir_dereference_array
*);
330 virtual void visit(ir_dereference_record
*);
331 virtual void visit(ir_assignment
*);
332 virtual void visit(ir_constant
*);
333 virtual void visit(ir_call
*);
334 virtual void visit(ir_return
*);
335 virtual void visit(ir_discard
*);
336 virtual void visit(ir_texture
*);
337 virtual void visit(ir_if
*);
342 /** List of variable_storage */
345 /** List of immediate_storage */
346 exec_list immediates
;
349 /** List of function_entry */
350 exec_list function_signatures
;
351 int next_signature_id
;
353 /** List of glsl_to_tgsi_instruction */
354 exec_list instructions
;
356 glsl_to_tgsi_instruction
*emit(ir_instruction
*ir
, unsigned op
);
358 glsl_to_tgsi_instruction
*emit(ir_instruction
*ir
, unsigned op
,
359 st_dst_reg dst
, st_src_reg src0
);
361 glsl_to_tgsi_instruction
*emit(ir_instruction
*ir
, unsigned op
,
362 st_dst_reg dst
, st_src_reg src0
, st_src_reg src1
);
364 glsl_to_tgsi_instruction
*emit(ir_instruction
*ir
, unsigned op
,
366 st_src_reg src0
, st_src_reg src1
, st_src_reg src2
);
368 unsigned get_opcode(ir_instruction
*ir
, unsigned op
,
370 st_src_reg src0
, st_src_reg src1
);
373 * Emit the correct dot-product instruction for the type of arguments
375 void emit_dp(ir_instruction
*ir
,
381 void emit_scalar(ir_instruction
*ir
, unsigned op
,
382 st_dst_reg dst
, st_src_reg src0
);
384 void emit_scalar(ir_instruction
*ir
, unsigned op
,
385 st_dst_reg dst
, st_src_reg src0
, st_src_reg src1
);
387 void emit_arl(ir_instruction
*ir
, st_dst_reg dst
, st_src_reg src0
);
389 void emit_scs(ir_instruction
*ir
, unsigned op
,
390 st_dst_reg dst
, const st_src_reg
&src
);
392 GLboolean
try_emit_mad(ir_expression
*ir
,
394 GLboolean
try_emit_sat(ir_expression
*ir
);
396 void emit_swz(ir_expression
*ir
);
398 bool process_move_condition(ir_rvalue
*ir
);
400 void remove_output_reads(gl_register_file type
);
401 void simplify_cmp(void);
403 void rename_temp_register(int index
, int new_index
);
404 int get_first_temp_read(int index
);
405 int get_first_temp_write(int index
);
406 int get_last_temp_read(int index
);
407 int get_last_temp_write(int index
);
409 void copy_propagate(void);
410 void eliminate_dead_code(void);
411 int eliminate_dead_code_advanced(void);
412 void merge_registers(void);
413 void renumber_registers(void);
418 static st_src_reg undef_src
= st_src_reg(PROGRAM_UNDEFINED
, 0, GLSL_TYPE_ERROR
);
420 static st_dst_reg undef_dst
= st_dst_reg(PROGRAM_UNDEFINED
, SWIZZLE_NOOP
, GLSL_TYPE_ERROR
);
422 static st_dst_reg address_reg
= st_dst_reg(PROGRAM_ADDRESS
, WRITEMASK_X
, GLSL_TYPE_FLOAT
);
425 fail_link(struct gl_shader_program
*prog
, const char *fmt
, ...) PRINTFLIKE(2, 3);
428 fail_link(struct gl_shader_program
*prog
, const char *fmt
, ...)
432 ralloc_vasprintf_append(&prog
->InfoLog
, fmt
, args
);
435 prog
->LinkStatus
= GL_FALSE
;
439 swizzle_for_size(int size
)
441 int size_swizzles
[4] = {
442 MAKE_SWIZZLE4(SWIZZLE_X
, SWIZZLE_X
, SWIZZLE_X
, SWIZZLE_X
),
443 MAKE_SWIZZLE4(SWIZZLE_X
, SWIZZLE_Y
, SWIZZLE_Y
, SWIZZLE_Y
),
444 MAKE_SWIZZLE4(SWIZZLE_X
, SWIZZLE_Y
, SWIZZLE_Z
, SWIZZLE_Z
),
445 MAKE_SWIZZLE4(SWIZZLE_X
, SWIZZLE_Y
, SWIZZLE_Z
, SWIZZLE_W
),
448 assert((size
>= 1) && (size
<= 4));
449 return size_swizzles
[size
- 1];
453 is_tex_instruction(unsigned opcode
)
455 const tgsi_opcode_info
* info
= tgsi_get_opcode_info(opcode
);
460 num_inst_dst_regs(unsigned opcode
)
462 const tgsi_opcode_info
* info
= tgsi_get_opcode_info(opcode
);
463 return info
->num_dst
;
467 num_inst_src_regs(unsigned opcode
)
469 const tgsi_opcode_info
* info
= tgsi_get_opcode_info(opcode
);
470 return info
->is_tex
? info
->num_src
- 1 : info
->num_src
;
473 glsl_to_tgsi_instruction
*
474 glsl_to_tgsi_visitor::emit(ir_instruction
*ir
, unsigned op
,
476 st_src_reg src0
, st_src_reg src1
, st_src_reg src2
)
478 glsl_to_tgsi_instruction
*inst
= new(mem_ctx
) glsl_to_tgsi_instruction();
479 int num_reladdr
= 0, i
;
481 op
= get_opcode(ir
, op
, dst
, src0
, src1
);
483 /* If we have to do relative addressing, we want to load the ARL
484 * reg directly for one of the regs, and preload the other reladdr
485 * sources into temps.
487 num_reladdr
+= dst
.reladdr
!= NULL
;
488 num_reladdr
+= src0
.reladdr
!= NULL
;
489 num_reladdr
+= src1
.reladdr
!= NULL
;
490 num_reladdr
+= src2
.reladdr
!= NULL
;
492 reladdr_to_temp(ir
, &src2
, &num_reladdr
);
493 reladdr_to_temp(ir
, &src1
, &num_reladdr
);
494 reladdr_to_temp(ir
, &src0
, &num_reladdr
);
497 emit_arl(ir
, address_reg
, *dst
.reladdr
);
500 assert(num_reladdr
== 0);
510 inst
->function
= NULL
;
512 if (op
== TGSI_OPCODE_ARL
)
513 this->num_address_regs
= 1;
515 /* Update indirect addressing status used by TGSI */
518 case PROGRAM_TEMPORARY
:
519 this->indirect_addr_temps
= true;
521 case PROGRAM_LOCAL_PARAM
:
522 case PROGRAM_ENV_PARAM
:
523 case PROGRAM_STATE_VAR
:
524 case PROGRAM_NAMED_PARAM
:
525 case PROGRAM_CONSTANT
:
526 case PROGRAM_UNIFORM
:
527 this->indirect_addr_consts
= true;
529 case PROGRAM_IMMEDIATE
:
530 assert(!"immediates should not have indirect addressing");
537 for (i
=0; i
<3; i
++) {
538 if(inst
->src
[i
].reladdr
) {
539 switch(inst
->src
[i
].file
) {
540 case PROGRAM_TEMPORARY
:
541 this->indirect_addr_temps
= true;
543 case PROGRAM_LOCAL_PARAM
:
544 case PROGRAM_ENV_PARAM
:
545 case PROGRAM_STATE_VAR
:
546 case PROGRAM_NAMED_PARAM
:
547 case PROGRAM_CONSTANT
:
548 case PROGRAM_UNIFORM
:
549 this->indirect_addr_consts
= true;
551 case PROGRAM_IMMEDIATE
:
552 assert(!"immediates should not have indirect addressing");
561 this->instructions
.push_tail(inst
);
567 glsl_to_tgsi_instruction
*
568 glsl_to_tgsi_visitor::emit(ir_instruction
*ir
, unsigned op
,
569 st_dst_reg dst
, st_src_reg src0
, st_src_reg src1
)
571 return emit(ir
, op
, dst
, src0
, src1
, undef_src
);
574 glsl_to_tgsi_instruction
*
575 glsl_to_tgsi_visitor::emit(ir_instruction
*ir
, unsigned op
,
576 st_dst_reg dst
, st_src_reg src0
)
578 assert(dst
.writemask
!= 0);
579 return emit(ir
, op
, dst
, src0
, undef_src
, undef_src
);
582 glsl_to_tgsi_instruction
*
583 glsl_to_tgsi_visitor::emit(ir_instruction
*ir
, unsigned op
)
585 return emit(ir
, op
, undef_dst
, undef_src
, undef_src
, undef_src
);
589 * Determines whether to use an integer, unsigned integer, or float opcode
590 * based on the operands and input opcode, then emits the result.
592 * TODO: type checking for remaining TGSI opcodes
595 glsl_to_tgsi_visitor::get_opcode(ir_instruction
*ir
, unsigned op
,
597 st_src_reg src0
, st_src_reg src1
)
599 int type
= GLSL_TYPE_FLOAT
;
601 if (src0
.type
== GLSL_TYPE_FLOAT
|| src1
.type
== GLSL_TYPE_FLOAT
)
602 type
= GLSL_TYPE_FLOAT
;
603 else if (glsl_version
>= 130)
606 #define case4(c, f, i, u) \
607 case TGSI_OPCODE_##c: \
608 if (type == GLSL_TYPE_INT) op = TGSI_OPCODE_##i; \
609 else if (type == GLSL_TYPE_UINT) op = TGSI_OPCODE_##u; \
610 else op = TGSI_OPCODE_##f; \
612 #define case3(f, i, u) case4(f, f, i, u)
613 #define case2fi(f, i) case4(f, f, i, i)
614 #define case2iu(i, u) case4(i, LAST, i, u)
620 case3(DIV
, IDIV
, UDIV
);
621 case3(MAX
, IMAX
, UMAX
);
622 case3(MIN
, IMIN
, UMIN
);
627 case3(SGE
, ISGE
, USGE
);
628 case3(SLT
, ISLT
, USLT
);
640 assert(op
!= TGSI_OPCODE_LAST
);
645 glsl_to_tgsi_visitor::emit_dp(ir_instruction
*ir
,
646 st_dst_reg dst
, st_src_reg src0
, st_src_reg src1
,
649 static const unsigned dot_opcodes
[] = {
650 TGSI_OPCODE_DP2
, TGSI_OPCODE_DP3
, TGSI_OPCODE_DP4
653 emit(ir
, dot_opcodes
[elements
- 2], dst
, src0
, src1
);
657 * Emits TGSI scalar opcodes to produce unique answers across channels.
659 * Some TGSI opcodes are scalar-only, like ARB_fp/vp. The src X
660 * channel determines the result across all channels. So to do a vec4
661 * of this operation, we want to emit a scalar per source channel used
662 * to produce dest channels.
665 glsl_to_tgsi_visitor::emit_scalar(ir_instruction
*ir
, unsigned op
,
667 st_src_reg orig_src0
, st_src_reg orig_src1
)
670 int done_mask
= ~dst
.writemask
;
672 /* TGSI RCP is a scalar operation splatting results to all channels,
673 * like ARB_fp/vp. So emit as many RCPs as necessary to cover our
676 for (i
= 0; i
< 4; i
++) {
677 GLuint this_mask
= (1 << i
);
678 glsl_to_tgsi_instruction
*inst
;
679 st_src_reg src0
= orig_src0
;
680 st_src_reg src1
= orig_src1
;
682 if (done_mask
& this_mask
)
685 GLuint src0_swiz
= GET_SWZ(src0
.swizzle
, i
);
686 GLuint src1_swiz
= GET_SWZ(src1
.swizzle
, i
);
687 for (j
= i
+ 1; j
< 4; j
++) {
688 /* If there is another enabled component in the destination that is
689 * derived from the same inputs, generate its value on this pass as
692 if (!(done_mask
& (1 << j
)) &&
693 GET_SWZ(src0
.swizzle
, j
) == src0_swiz
&&
694 GET_SWZ(src1
.swizzle
, j
) == src1_swiz
) {
695 this_mask
|= (1 << j
);
698 src0
.swizzle
= MAKE_SWIZZLE4(src0_swiz
, src0_swiz
,
699 src0_swiz
, src0_swiz
);
700 src1
.swizzle
= MAKE_SWIZZLE4(src1_swiz
, src1_swiz
,
701 src1_swiz
, src1_swiz
);
703 inst
= emit(ir
, op
, dst
, src0
, src1
);
704 inst
->dst
.writemask
= this_mask
;
705 done_mask
|= this_mask
;
710 glsl_to_tgsi_visitor::emit_scalar(ir_instruction
*ir
, unsigned op
,
711 st_dst_reg dst
, st_src_reg src0
)
713 st_src_reg undef
= undef_src
;
715 undef
.swizzle
= SWIZZLE_XXXX
;
717 emit_scalar(ir
, op
, dst
, src0
, undef
);
721 glsl_to_tgsi_visitor::emit_arl(ir_instruction
*ir
,
722 st_dst_reg dst
, st_src_reg src0
)
724 st_src_reg tmp
= get_temp(glsl_type::float_type
);
726 if (src0
.type
== GLSL_TYPE_INT
)
727 emit(NULL
, TGSI_OPCODE_I2F
, st_dst_reg(tmp
), src0
);
728 else if (src0
.type
== GLSL_TYPE_UINT
)
729 emit(NULL
, TGSI_OPCODE_U2F
, st_dst_reg(tmp
), src0
);
733 emit(NULL
, TGSI_OPCODE_ARL
, dst
, tmp
);
737 * Emit an TGSI_OPCODE_SCS instruction
739 * The \c SCS opcode functions a bit differently than the other TGSI opcodes.
740 * Instead of splatting its result across all four components of the
741 * destination, it writes one value to the \c x component and another value to
742 * the \c y component.
744 * \param ir IR instruction being processed
745 * \param op Either \c TGSI_OPCODE_SIN or \c TGSI_OPCODE_COS depending
746 * on which value is desired.
747 * \param dst Destination register
748 * \param src Source register
751 glsl_to_tgsi_visitor::emit_scs(ir_instruction
*ir
, unsigned op
,
753 const st_src_reg
&src
)
755 /* Vertex programs cannot use the SCS opcode.
757 if (this->prog
->Target
== GL_VERTEX_PROGRAM_ARB
) {
758 emit_scalar(ir
, op
, dst
, src
);
762 const unsigned component
= (op
== TGSI_OPCODE_SIN
) ? 0 : 1;
763 const unsigned scs_mask
= (1U << component
);
764 int done_mask
= ~dst
.writemask
;
767 assert(op
== TGSI_OPCODE_SIN
|| op
== TGSI_OPCODE_COS
);
769 /* If there are compnents in the destination that differ from the component
770 * that will be written by the SCS instrution, we'll need a temporary.
772 if (scs_mask
!= unsigned(dst
.writemask
)) {
773 tmp
= get_temp(glsl_type::vec4_type
);
776 for (unsigned i
= 0; i
< 4; i
++) {
777 unsigned this_mask
= (1U << i
);
778 st_src_reg src0
= src
;
780 if ((done_mask
& this_mask
) != 0)
783 /* The source swizzle specified which component of the source generates
784 * sine / cosine for the current component in the destination. The SCS
785 * instruction requires that this value be swizzle to the X component.
786 * Replace the current swizzle with a swizzle that puts the source in
789 unsigned src0_swiz
= GET_SWZ(src
.swizzle
, i
);
791 src0
.swizzle
= MAKE_SWIZZLE4(src0_swiz
, src0_swiz
,
792 src0_swiz
, src0_swiz
);
793 for (unsigned j
= i
+ 1; j
< 4; j
++) {
794 /* If there is another enabled component in the destination that is
795 * derived from the same inputs, generate its value on this pass as
798 if (!(done_mask
& (1 << j
)) &&
799 GET_SWZ(src0
.swizzle
, j
) == src0_swiz
) {
800 this_mask
|= (1 << j
);
804 if (this_mask
!= scs_mask
) {
805 glsl_to_tgsi_instruction
*inst
;
806 st_dst_reg tmp_dst
= st_dst_reg(tmp
);
808 /* Emit the SCS instruction.
810 inst
= emit(ir
, TGSI_OPCODE_SCS
, tmp_dst
, src0
);
811 inst
->dst
.writemask
= scs_mask
;
813 /* Move the result of the SCS instruction to the desired location in
816 tmp
.swizzle
= MAKE_SWIZZLE4(component
, component
,
817 component
, component
);
818 inst
= emit(ir
, TGSI_OPCODE_SCS
, dst
, tmp
);
819 inst
->dst
.writemask
= this_mask
;
821 /* Emit the SCS instruction to write directly to the destination.
823 glsl_to_tgsi_instruction
*inst
= emit(ir
, TGSI_OPCODE_SCS
, dst
, src0
);
824 inst
->dst
.writemask
= scs_mask
;
827 done_mask
|= this_mask
;
832 glsl_to_tgsi_visitor::add_constant(gl_register_file file
,
833 gl_constant_value values
[4], int size
, int datatype
,
836 if (file
== PROGRAM_CONSTANT
) {
837 return _mesa_add_typed_unnamed_constant(this->prog
->Parameters
, values
,
838 size
, datatype
, swizzle_out
);
841 immediate_storage
*entry
;
842 assert(file
== PROGRAM_IMMEDIATE
);
844 /* Search immediate storage to see if we already have an identical
845 * immediate that we can use instead of adding a duplicate entry.
847 foreach_iter(exec_list_iterator
, iter
, this->immediates
) {
848 entry
= (immediate_storage
*)iter
.get();
850 if (entry
->size
== size
&&
851 entry
->type
== datatype
&&
852 !memcmp(entry
->values
, values
, size
* sizeof(gl_constant_value
))) {
858 /* Add this immediate to the list. */
859 entry
= new(mem_ctx
) immediate_storage(values
, size
, datatype
);
860 this->immediates
.push_tail(entry
);
861 this->num_immediates
++;
867 glsl_to_tgsi_visitor::st_src_reg_for_float(float val
)
869 st_src_reg
src(PROGRAM_IMMEDIATE
, -1, GLSL_TYPE_FLOAT
);
870 union gl_constant_value uval
;
873 src
.index
= add_constant(src
.file
, &uval
, 1, GL_FLOAT
, &src
.swizzle
);
879 glsl_to_tgsi_visitor::st_src_reg_for_int(int val
)
881 st_src_reg
src(PROGRAM_IMMEDIATE
, -1, GLSL_TYPE_INT
);
882 union gl_constant_value uval
;
884 assert(glsl_version
>= 130);
887 src
.index
= add_constant(src
.file
, &uval
, 1, GL_INT
, &src
.swizzle
);
893 glsl_to_tgsi_visitor::st_src_reg_for_type(int type
, int val
)
895 if (glsl_version
>= 130)
896 return type
== GLSL_TYPE_FLOAT
? st_src_reg_for_float(val
) :
897 st_src_reg_for_int(val
);
899 return st_src_reg_for_float(val
);
903 type_size(const struct glsl_type
*type
)
908 switch (type
->base_type
) {
911 case GLSL_TYPE_FLOAT
:
913 if (type
->is_matrix()) {
914 return type
->matrix_columns
;
916 /* Regardless of size of vector, it gets a vec4. This is bad
917 * packing for things like floats, but otherwise arrays become a
918 * mess. Hopefully a later pass over the code can pack scalars
919 * down if appropriate.
923 case GLSL_TYPE_ARRAY
:
924 assert(type
->length
> 0);
925 return type_size(type
->fields
.array
) * type
->length
;
926 case GLSL_TYPE_STRUCT
:
928 for (i
= 0; i
< type
->length
; i
++) {
929 size
+= type_size(type
->fields
.structure
[i
].type
);
932 case GLSL_TYPE_SAMPLER
:
933 /* Samplers take up one slot in UNIFORMS[], but they're baked in
944 * In the initial pass of codegen, we assign temporary numbers to
945 * intermediate results. (not SSA -- variable assignments will reuse
949 glsl_to_tgsi_visitor::get_temp(const glsl_type
*type
)
955 src
.type
= glsl_version
>= 130 ? type
->base_type
: GLSL_TYPE_FLOAT
;
956 src
.file
= PROGRAM_TEMPORARY
;
957 src
.index
= next_temp
;
959 next_temp
+= type_size(type
);
961 if (type
->is_array() || type
->is_record()) {
962 src
.swizzle
= SWIZZLE_NOOP
;
964 for (i
= 0; i
< type
->vector_elements
; i
++)
967 swizzle
[i
] = type
->vector_elements
- 1;
968 src
.swizzle
= MAKE_SWIZZLE4(swizzle
[0], swizzle
[1],
969 swizzle
[2], swizzle
[3]);
977 glsl_to_tgsi_visitor::find_variable_storage(ir_variable
*var
)
980 variable_storage
*entry
;
982 foreach_iter(exec_list_iterator
, iter
, this->variables
) {
983 entry
= (variable_storage
*)iter
.get();
985 if (entry
->var
== var
)
993 glsl_to_tgsi_visitor::visit(ir_variable
*ir
)
995 if (strcmp(ir
->name
, "gl_FragCoord") == 0) {
996 struct gl_fragment_program
*fp
= (struct gl_fragment_program
*)this->prog
;
998 fp
->OriginUpperLeft
= ir
->origin_upper_left
;
999 fp
->PixelCenterInteger
= ir
->pixel_center_integer
;
1001 } else if (strcmp(ir
->name
, "gl_FragDepth") == 0) {
1002 struct gl_fragment_program
*fp
= (struct gl_fragment_program
*)this->prog
;
1003 switch (ir
->depth_layout
) {
1004 case ir_depth_layout_none
:
1005 fp
->FragDepthLayout
= FRAG_DEPTH_LAYOUT_NONE
;
1007 case ir_depth_layout_any
:
1008 fp
->FragDepthLayout
= FRAG_DEPTH_LAYOUT_ANY
;
1010 case ir_depth_layout_greater
:
1011 fp
->FragDepthLayout
= FRAG_DEPTH_LAYOUT_GREATER
;
1013 case ir_depth_layout_less
:
1014 fp
->FragDepthLayout
= FRAG_DEPTH_LAYOUT_LESS
;
1016 case ir_depth_layout_unchanged
:
1017 fp
->FragDepthLayout
= FRAG_DEPTH_LAYOUT_UNCHANGED
;
1025 if (ir
->mode
== ir_var_uniform
&& strncmp(ir
->name
, "gl_", 3) == 0) {
1027 const ir_state_slot
*const slots
= ir
->state_slots
;
1028 assert(ir
->state_slots
!= NULL
);
1030 /* Check if this statevar's setup in the STATE file exactly
1031 * matches how we'll want to reference it as a
1032 * struct/array/whatever. If not, then we need to move it into
1033 * temporary storage and hope that it'll get copy-propagated
1036 for (i
= 0; i
< ir
->num_state_slots
; i
++) {
1037 if (slots
[i
].swizzle
!= SWIZZLE_XYZW
) {
1042 struct variable_storage
*storage
;
1044 if (i
== ir
->num_state_slots
) {
1045 /* We'll set the index later. */
1046 storage
= new(mem_ctx
) variable_storage(ir
, PROGRAM_STATE_VAR
, -1);
1047 this->variables
.push_tail(storage
);
1051 /* The variable_storage constructor allocates slots based on the size
1052 * of the type. However, this had better match the number of state
1053 * elements that we're going to copy into the new temporary.
1055 assert((int) ir
->num_state_slots
== type_size(ir
->type
));
1057 storage
= new(mem_ctx
) variable_storage(ir
, PROGRAM_TEMPORARY
,
1059 this->variables
.push_tail(storage
);
1060 this->next_temp
+= type_size(ir
->type
);
1062 dst
= st_dst_reg(st_src_reg(PROGRAM_TEMPORARY
, storage
->index
,
1063 glsl_version
>= 130 ? ir
->type
->base_type
: GLSL_TYPE_FLOAT
));
1067 for (unsigned int i
= 0; i
< ir
->num_state_slots
; i
++) {
1068 int index
= _mesa_add_state_reference(this->prog
->Parameters
,
1069 (gl_state_index
*)slots
[i
].tokens
);
1071 if (storage
->file
== PROGRAM_STATE_VAR
) {
1072 if (storage
->index
== -1) {
1073 storage
->index
= index
;
1075 assert(index
== storage
->index
+ (int)i
);
1078 st_src_reg
src(PROGRAM_STATE_VAR
, index
,
1079 glsl_version
>= 130 ? ir
->type
->base_type
: GLSL_TYPE_FLOAT
);
1080 src
.swizzle
= slots
[i
].swizzle
;
1081 emit(ir
, TGSI_OPCODE_MOV
, dst
, src
);
1082 /* even a float takes up a whole vec4 reg in a struct/array. */
1087 if (storage
->file
== PROGRAM_TEMPORARY
&&
1088 dst
.index
!= storage
->index
+ (int) ir
->num_state_slots
) {
1089 fail_link(this->shader_program
,
1090 "failed to load builtin uniform `%s' (%d/%d regs loaded)\n",
1091 ir
->name
, dst
.index
- storage
->index
,
1092 type_size(ir
->type
));
1098 glsl_to_tgsi_visitor::visit(ir_loop
*ir
)
1100 ir_dereference_variable
*counter
= NULL
;
1102 if (ir
->counter
!= NULL
)
1103 counter
= new(ir
) ir_dereference_variable(ir
->counter
);
1105 if (ir
->from
!= NULL
) {
1106 assert(ir
->counter
!= NULL
);
1108 ir_assignment
*a
= new(ir
) ir_assignment(counter
, ir
->from
, NULL
);
1114 emit(NULL
, TGSI_OPCODE_BGNLOOP
);
1118 new(ir
) ir_expression(ir
->cmp
, glsl_type::bool_type
,
1120 ir_if
*if_stmt
= new(ir
) ir_if(e
);
1122 ir_loop_jump
*brk
= new(ir
) ir_loop_jump(ir_loop_jump::jump_break
);
1124 if_stmt
->then_instructions
.push_tail(brk
);
1126 if_stmt
->accept(this);
1133 visit_exec_list(&ir
->body_instructions
, this);
1135 if (ir
->increment
) {
1137 new(ir
) ir_expression(ir_binop_add
, counter
->type
,
1138 counter
, ir
->increment
);
1140 ir_assignment
*a
= new(ir
) ir_assignment(counter
, e
, NULL
);
1147 emit(NULL
, TGSI_OPCODE_ENDLOOP
);
1151 glsl_to_tgsi_visitor::visit(ir_loop_jump
*ir
)
1154 case ir_loop_jump::jump_break
:
1155 emit(NULL
, TGSI_OPCODE_BRK
);
1157 case ir_loop_jump::jump_continue
:
1158 emit(NULL
, TGSI_OPCODE_CONT
);
1165 glsl_to_tgsi_visitor::visit(ir_function_signature
*ir
)
1172 glsl_to_tgsi_visitor::visit(ir_function
*ir
)
1174 /* Ignore function bodies other than main() -- we shouldn't see calls to
1175 * them since they should all be inlined before we get to glsl_to_tgsi.
1177 if (strcmp(ir
->name
, "main") == 0) {
1178 const ir_function_signature
*sig
;
1181 sig
= ir
->matching_signature(&empty
);
1185 foreach_iter(exec_list_iterator
, iter
, sig
->body
) {
1186 ir_instruction
*ir
= (ir_instruction
*)iter
.get();
1194 glsl_to_tgsi_visitor::try_emit_mad(ir_expression
*ir
, int mul_operand
)
1196 int nonmul_operand
= 1 - mul_operand
;
1198 st_dst_reg result_dst
;
1200 ir_expression
*expr
= ir
->operands
[mul_operand
]->as_expression();
1201 if (!expr
|| expr
->operation
!= ir_binop_mul
)
1204 expr
->operands
[0]->accept(this);
1206 expr
->operands
[1]->accept(this);
1208 ir
->operands
[nonmul_operand
]->accept(this);
1211 this->result
= get_temp(ir
->type
);
1212 result_dst
= st_dst_reg(this->result
);
1213 result_dst
.writemask
= (1 << ir
->type
->vector_elements
) - 1;
1214 emit(ir
, TGSI_OPCODE_MAD
, result_dst
, a
, b
, c
);
1220 glsl_to_tgsi_visitor::try_emit_sat(ir_expression
*ir
)
1222 /* Saturates were only introduced to vertex programs in
1223 * NV_vertex_program3, so don't give them to drivers in the VP.
1225 if (this->prog
->Target
== GL_VERTEX_PROGRAM_ARB
)
1228 ir_rvalue
*sat_src
= ir
->as_rvalue_to_saturate();
1232 sat_src
->accept(this);
1233 st_src_reg src
= this->result
;
1235 this->result
= get_temp(ir
->type
);
1236 st_dst_reg result_dst
= st_dst_reg(this->result
);
1237 result_dst
.writemask
= (1 << ir
->type
->vector_elements
) - 1;
1238 glsl_to_tgsi_instruction
*inst
;
1239 inst
= emit(ir
, TGSI_OPCODE_MOV
, result_dst
, src
);
1240 inst
->saturate
= true;
1246 glsl_to_tgsi_visitor::reladdr_to_temp(ir_instruction
*ir
,
1247 st_src_reg
*reg
, int *num_reladdr
)
1252 emit_arl(ir
, address_reg
, *reg
->reladdr
);
1254 if (*num_reladdr
!= 1) {
1255 st_src_reg temp
= get_temp(glsl_type::vec4_type
);
1257 emit(ir
, TGSI_OPCODE_MOV
, st_dst_reg(temp
), *reg
);
1265 glsl_to_tgsi_visitor::visit(ir_expression
*ir
)
1267 unsigned int operand
;
1268 st_src_reg op
[Elements(ir
->operands
)];
1269 st_src_reg result_src
;
1270 st_dst_reg result_dst
;
1272 /* Quick peephole: Emit MAD(a, b, c) instead of ADD(MUL(a, b), c)
1274 if (ir
->operation
== ir_binop_add
) {
1275 if (try_emit_mad(ir
, 1))
1277 if (try_emit_mad(ir
, 0))
1280 if (try_emit_sat(ir
))
1283 if (ir
->operation
== ir_quadop_vector
)
1284 assert(!"ir_quadop_vector should have been lowered");
1286 for (operand
= 0; operand
< ir
->get_num_operands(); operand
++) {
1287 this->result
.file
= PROGRAM_UNDEFINED
;
1288 ir
->operands
[operand
]->accept(this);
1289 if (this->result
.file
== PROGRAM_UNDEFINED
) {
1291 printf("Failed to get tree for expression operand:\n");
1292 ir
->operands
[operand
]->accept(&v
);
1295 op
[operand
] = this->result
;
1297 /* Matrix expression operands should have been broken down to vector
1298 * operations already.
1300 assert(!ir
->operands
[operand
]->type
->is_matrix());
1303 int vector_elements
= ir
->operands
[0]->type
->vector_elements
;
1304 if (ir
->operands
[1]) {
1305 vector_elements
= MAX2(vector_elements
,
1306 ir
->operands
[1]->type
->vector_elements
);
1309 this->result
.file
= PROGRAM_UNDEFINED
;
1311 /* Storage for our result. Ideally for an assignment we'd be using
1312 * the actual storage for the result here, instead.
1314 result_src
= get_temp(ir
->type
);
1315 /* convenience for the emit functions below. */
1316 result_dst
= st_dst_reg(result_src
);
1317 /* Limit writes to the channels that will be used by result_src later.
1318 * This does limit this temp's use as a temporary for multi-instruction
1321 result_dst
.writemask
= (1 << ir
->type
->vector_elements
) - 1;
1323 switch (ir
->operation
) {
1324 case ir_unop_logic_not
:
1325 emit(ir
, TGSI_OPCODE_SEQ
, result_dst
, op
[0], st_src_reg_for_type(result_dst
.type
, 0));
1328 assert(result_dst
.type
== GLSL_TYPE_FLOAT
|| result_dst
.type
== GLSL_TYPE_INT
);
1329 if (result_dst
.type
== GLSL_TYPE_INT
)
1330 emit(ir
, TGSI_OPCODE_INEG
, result_dst
, op
[0]);
1332 op
[0].negate
= ~op
[0].negate
;
1337 assert(result_dst
.type
== GLSL_TYPE_FLOAT
);
1338 emit(ir
, TGSI_OPCODE_ABS
, result_dst
, op
[0]);
1341 emit(ir
, TGSI_OPCODE_SSG
, result_dst
, op
[0]);
1344 emit_scalar(ir
, TGSI_OPCODE_RCP
, result_dst
, op
[0]);
1348 emit_scalar(ir
, TGSI_OPCODE_EX2
, result_dst
, op
[0]);
1352 assert(!"not reached: should be handled by ir_explog_to_explog2");
1355 emit_scalar(ir
, TGSI_OPCODE_LG2
, result_dst
, op
[0]);
1358 emit_scalar(ir
, TGSI_OPCODE_SIN
, result_dst
, op
[0]);
1361 emit_scalar(ir
, TGSI_OPCODE_COS
, result_dst
, op
[0]);
1363 case ir_unop_sin_reduced
:
1364 emit_scs(ir
, TGSI_OPCODE_SIN
, result_dst
, op
[0]);
1366 case ir_unop_cos_reduced
:
1367 emit_scs(ir
, TGSI_OPCODE_COS
, result_dst
, op
[0]);
1371 emit(ir
, TGSI_OPCODE_DDX
, result_dst
, op
[0]);
1374 op
[0].negate
= ~op
[0].negate
;
1375 emit(ir
, TGSI_OPCODE_DDY
, result_dst
, op
[0]);
1378 case ir_unop_noise
: {
1379 /* At some point, a motivated person could add a better
1380 * implementation of noise. Currently not even the nvidia
1381 * binary drivers do anything more than this. In any case, the
1382 * place to do this is in the GL state tracker, not the poor
1385 emit(ir
, TGSI_OPCODE_MOV
, result_dst
, st_src_reg_for_float(0.5));
1390 emit(ir
, TGSI_OPCODE_ADD
, result_dst
, op
[0], op
[1]);
1393 emit(ir
, TGSI_OPCODE_SUB
, result_dst
, op
[0], op
[1]);
1397 emit(ir
, TGSI_OPCODE_MUL
, result_dst
, op
[0], op
[1]);
1400 if (result_dst
.type
== GLSL_TYPE_FLOAT
)
1401 assert(!"not reached: should be handled by ir_div_to_mul_rcp");
1403 emit(ir
, TGSI_OPCODE_DIV
, result_dst
, op
[0], op
[1]);
1406 if (result_dst
.type
== GLSL_TYPE_FLOAT
)
1407 assert(!"ir_binop_mod should have been converted to b * fract(a/b)");
1409 emit(ir
, TGSI_OPCODE_MOD
, result_dst
, op
[0], op
[1]);
1413 emit(ir
, TGSI_OPCODE_SLT
, result_dst
, op
[0], op
[1]);
1415 case ir_binop_greater
:
1416 emit(ir
, TGSI_OPCODE_SGT
, result_dst
, op
[0], op
[1]);
1418 case ir_binop_lequal
:
1419 emit(ir
, TGSI_OPCODE_SLE
, result_dst
, op
[0], op
[1]);
1421 case ir_binop_gequal
:
1422 emit(ir
, TGSI_OPCODE_SGE
, result_dst
, op
[0], op
[1]);
1424 case ir_binop_equal
:
1425 emit(ir
, TGSI_OPCODE_SEQ
, result_dst
, op
[0], op
[1]);
1427 case ir_binop_nequal
:
1428 emit(ir
, TGSI_OPCODE_SNE
, result_dst
, op
[0], op
[1]);
1430 case ir_binop_all_equal
:
1431 /* "==" operator producing a scalar boolean. */
1432 if (ir
->operands
[0]->type
->is_vector() ||
1433 ir
->operands
[1]->type
->is_vector()) {
1434 st_src_reg temp
= get_temp(glsl_version
>= 130 ?
1435 glsl_type::get_instance(ir
->operands
[0]->type
->base_type
, 4, 1) :
1436 glsl_type::vec4_type
);
1437 assert(ir
->operands
[0]->type
->base_type
== GLSL_TYPE_FLOAT
);
1438 emit(ir
, TGSI_OPCODE_SNE
, st_dst_reg(temp
), op
[0], op
[1]);
1439 emit_dp(ir
, result_dst
, temp
, temp
, vector_elements
);
1440 emit(ir
, TGSI_OPCODE_SEQ
, result_dst
, result_src
, st_src_reg_for_float(0.0));
1442 emit(ir
, TGSI_OPCODE_SEQ
, result_dst
, op
[0], op
[1]);
1445 case ir_binop_any_nequal
:
1446 /* "!=" operator producing a scalar boolean. */
1447 if (ir
->operands
[0]->type
->is_vector() ||
1448 ir
->operands
[1]->type
->is_vector()) {
1449 st_src_reg temp
= get_temp(glsl_version
>= 130 ?
1450 glsl_type::get_instance(ir
->operands
[0]->type
->base_type
, 4, 1) :
1451 glsl_type::vec4_type
);
1452 assert(ir
->operands
[0]->type
->base_type
== GLSL_TYPE_FLOAT
);
1453 emit(ir
, TGSI_OPCODE_SNE
, st_dst_reg(temp
), op
[0], op
[1]);
1454 emit_dp(ir
, result_dst
, temp
, temp
, vector_elements
);
1455 emit(ir
, TGSI_OPCODE_SNE
, result_dst
, result_src
, st_src_reg_for_float(0.0));
1457 emit(ir
, TGSI_OPCODE_SNE
, result_dst
, op
[0], op
[1]);
1462 assert(ir
->operands
[0]->type
->is_vector());
1463 emit_dp(ir
, result_dst
, op
[0], op
[0],
1464 ir
->operands
[0]->type
->vector_elements
);
1465 emit(ir
, TGSI_OPCODE_SNE
, result_dst
, result_src
, st_src_reg_for_float(0.0));
1468 case ir_binop_logic_xor
:
1469 emit(ir
, TGSI_OPCODE_SNE
, result_dst
, op
[0], op
[1]);
1472 case ir_binop_logic_or
:
1473 /* This could be a saturated add and skip the SNE. */
1474 emit(ir
, TGSI_OPCODE_ADD
, result_dst
, op
[0], op
[1]);
1475 emit(ir
, TGSI_OPCODE_SNE
, result_dst
, result_src
, st_src_reg_for_float(0.0));
1478 case ir_binop_logic_and
:
1479 /* the bool args are stored as float 0.0 or 1.0, so "mul" gives us "and". */
1480 emit(ir
, TGSI_OPCODE_MUL
, result_dst
, op
[0], op
[1]);
1484 assert(ir
->operands
[0]->type
->is_vector());
1485 assert(ir
->operands
[0]->type
== ir
->operands
[1]->type
);
1486 emit_dp(ir
, result_dst
, op
[0], op
[1],
1487 ir
->operands
[0]->type
->vector_elements
);
1491 /* sqrt(x) = x * rsq(x). */
1492 emit_scalar(ir
, TGSI_OPCODE_RSQ
, result_dst
, op
[0]);
1493 emit(ir
, TGSI_OPCODE_MUL
, result_dst
, result_src
, op
[0]);
1494 /* For incoming channels <= 0, set the result to 0. */
1495 op
[0].negate
= ~op
[0].negate
;
1496 emit(ir
, TGSI_OPCODE_CMP
, result_dst
,
1497 op
[0], result_src
, st_src_reg_for_float(0.0));
1500 emit_scalar(ir
, TGSI_OPCODE_RSQ
, result_dst
, op
[0]);
1504 if (glsl_version
>= 130) {
1505 emit(ir
, TGSI_OPCODE_I2F
, result_dst
, op
[0]);
1510 /* Converting between signed and unsigned integers is a no-op. */
1512 /* Booleans are stored as integers (or floats in GLSL 1.20 and lower). */
1516 if (glsl_version
>= 130)
1517 emit(ir
, TGSI_OPCODE_F2I
, result_dst
, op
[0]);
1519 emit(ir
, TGSI_OPCODE_TRUNC
, result_dst
, op
[0]);
1523 emit(ir
, TGSI_OPCODE_SNE
, result_dst
, op
[0],
1524 st_src_reg_for_type(result_dst
.type
, 0));
1527 emit(ir
, TGSI_OPCODE_TRUNC
, result_dst
, op
[0]);
1530 op
[0].negate
= ~op
[0].negate
;
1531 emit(ir
, TGSI_OPCODE_FLR
, result_dst
, op
[0]);
1532 result_src
.negate
= ~result_src
.negate
;
1535 emit(ir
, TGSI_OPCODE_FLR
, result_dst
, op
[0]);
1538 emit(ir
, TGSI_OPCODE_FRC
, result_dst
, op
[0]);
1542 emit(ir
, TGSI_OPCODE_MIN
, result_dst
, op
[0], op
[1]);
1545 emit(ir
, TGSI_OPCODE_MAX
, result_dst
, op
[0], op
[1]);
1548 emit_scalar(ir
, TGSI_OPCODE_POW
, result_dst
, op
[0], op
[1]);
1551 case ir_unop_bit_not
:
1552 if (glsl_version
>= 130) {
1553 emit(ir
, TGSI_OPCODE_NOT
, result_dst
, op
[0]);
1557 if (glsl_version
>= 130) {
1558 emit(ir
, TGSI_OPCODE_U2F
, result_dst
, op
[0]);
1561 case ir_binop_lshift
:
1562 if (glsl_version
>= 130) {
1563 emit(ir
, TGSI_OPCODE_SHL
, result_dst
, op
[0]);
1566 case ir_binop_rshift
:
1567 if (glsl_version
>= 130) {
1568 emit(ir
, TGSI_OPCODE_ISHR
, result_dst
, op
[0]);
1571 case ir_binop_bit_and
:
1572 if (glsl_version
>= 130) {
1573 emit(ir
, TGSI_OPCODE_AND
, result_dst
, op
[0]);
1576 case ir_binop_bit_xor
:
1577 if (glsl_version
>= 130) {
1578 emit(ir
, TGSI_OPCODE_XOR
, result_dst
, op
[0]);
1581 case ir_binop_bit_or
:
1582 if (glsl_version
>= 130) {
1583 emit(ir
, TGSI_OPCODE_OR
, result_dst
, op
[0]);
1586 case ir_unop_round_even
:
1587 assert(!"GLSL 1.30 features unsupported");
1590 case ir_quadop_vector
:
1591 /* This operation should have already been handled.
1593 assert(!"Should not get here.");
1597 this->result
= result_src
;
1602 glsl_to_tgsi_visitor::visit(ir_swizzle
*ir
)
1608 /* Note that this is only swizzles in expressions, not those on the left
1609 * hand side of an assignment, which do write masking. See ir_assignment
1613 ir
->val
->accept(this);
1615 assert(src
.file
!= PROGRAM_UNDEFINED
);
1617 for (i
= 0; i
< 4; i
++) {
1618 if (i
< ir
->type
->vector_elements
) {
1621 swizzle
[i
] = GET_SWZ(src
.swizzle
, ir
->mask
.x
);
1624 swizzle
[i
] = GET_SWZ(src
.swizzle
, ir
->mask
.y
);
1627 swizzle
[i
] = GET_SWZ(src
.swizzle
, ir
->mask
.z
);
1630 swizzle
[i
] = GET_SWZ(src
.swizzle
, ir
->mask
.w
);
1634 /* If the type is smaller than a vec4, replicate the last
1637 swizzle
[i
] = swizzle
[ir
->type
->vector_elements
- 1];
1641 src
.swizzle
= MAKE_SWIZZLE4(swizzle
[0], swizzle
[1], swizzle
[2], swizzle
[3]);
1647 glsl_to_tgsi_visitor::visit(ir_dereference_variable
*ir
)
1649 variable_storage
*entry
= find_variable_storage(ir
->var
);
1650 ir_variable
*var
= ir
->var
;
1653 switch (var
->mode
) {
1654 case ir_var_uniform
:
1655 entry
= new(mem_ctx
) variable_storage(var
, PROGRAM_UNIFORM
,
1657 this->variables
.push_tail(entry
);
1661 /* The linker assigns locations for varyings and attributes,
1662 * including deprecated builtins (like gl_Color), user-assign
1663 * generic attributes (glBindVertexLocation), and
1664 * user-defined varyings.
1666 * FINISHME: We would hit this path for function arguments. Fix!
1668 assert(var
->location
!= -1);
1669 entry
= new(mem_ctx
) variable_storage(var
,
1672 if (this->prog
->Target
== GL_VERTEX_PROGRAM_ARB
&&
1673 var
->location
>= VERT_ATTRIB_GENERIC0
) {
1674 _mesa_add_attribute(this->prog
->Attributes
,
1676 _mesa_sizeof_glsl_type(var
->type
->gl_type
),
1678 var
->location
- VERT_ATTRIB_GENERIC0
);
1682 assert(var
->location
!= -1);
1683 entry
= new(mem_ctx
) variable_storage(var
,
1687 case ir_var_system_value
:
1688 entry
= new(mem_ctx
) variable_storage(var
,
1689 PROGRAM_SYSTEM_VALUE
,
1693 case ir_var_temporary
:
1694 entry
= new(mem_ctx
) variable_storage(var
, PROGRAM_TEMPORARY
,
1696 this->variables
.push_tail(entry
);
1698 next_temp
+= type_size(var
->type
);
1703 printf("Failed to make storage for %s\n", var
->name
);
1708 this->result
= st_src_reg(entry
->file
, entry
->index
, var
->type
);
1709 if (glsl_version
<= 120)
1710 this->result
.type
= GLSL_TYPE_FLOAT
;
1714 glsl_to_tgsi_visitor::visit(ir_dereference_array
*ir
)
1718 int element_size
= type_size(ir
->type
);
1720 index
= ir
->array_index
->constant_expression_value();
1722 ir
->array
->accept(this);
1726 src
.index
+= index
->value
.i
[0] * element_size
;
1728 st_src_reg array_base
= this->result
;
1729 /* Variable index array dereference. It eats the "vec4" of the
1730 * base of the array and an index that offsets the TGSI register
1733 ir
->array_index
->accept(this);
1735 st_src_reg index_reg
;
1737 if (element_size
== 1) {
1738 index_reg
= this->result
;
1740 index_reg
= get_temp(glsl_type::float_type
);
1742 emit(ir
, TGSI_OPCODE_MUL
, st_dst_reg(index_reg
),
1743 this->result
, st_src_reg_for_float(element_size
));
1746 /* If there was already a relative address register involved, add the
1747 * new and the old together to get the new offset.
1749 if (src
.reladdr
!= NULL
) {
1750 st_src_reg accum_reg
= get_temp(glsl_type::float_type
);
1752 emit(ir
, TGSI_OPCODE_ADD
, st_dst_reg(accum_reg
),
1753 index_reg
, *src
.reladdr
);
1755 index_reg
= accum_reg
;
1758 src
.reladdr
= ralloc(mem_ctx
, st_src_reg
);
1759 memcpy(src
.reladdr
, &index_reg
, sizeof(index_reg
));
1762 /* If the type is smaller than a vec4, replicate the last channel out. */
1763 if (ir
->type
->is_scalar() || ir
->type
->is_vector())
1764 src
.swizzle
= swizzle_for_size(ir
->type
->vector_elements
);
1766 src
.swizzle
= SWIZZLE_NOOP
;
1772 glsl_to_tgsi_visitor::visit(ir_dereference_record
*ir
)
1775 const glsl_type
*struct_type
= ir
->record
->type
;
1778 ir
->record
->accept(this);
1780 for (i
= 0; i
< struct_type
->length
; i
++) {
1781 if (strcmp(struct_type
->fields
.structure
[i
].name
, ir
->field
) == 0)
1783 offset
+= type_size(struct_type
->fields
.structure
[i
].type
);
1786 /* If the type is smaller than a vec4, replicate the last channel out. */
1787 if (ir
->type
->is_scalar() || ir
->type
->is_vector())
1788 this->result
.swizzle
= swizzle_for_size(ir
->type
->vector_elements
);
1790 this->result
.swizzle
= SWIZZLE_NOOP
;
1792 this->result
.index
+= offset
;
1796 * We want to be careful in assignment setup to hit the actual storage
1797 * instead of potentially using a temporary like we might with the
1798 * ir_dereference handler.
1801 get_assignment_lhs(ir_dereference
*ir
, glsl_to_tgsi_visitor
*v
)
1803 /* The LHS must be a dereference. If the LHS is a variable indexed array
1804 * access of a vector, it must be separated into a series conditional moves
1805 * before reaching this point (see ir_vec_index_to_cond_assign).
1807 assert(ir
->as_dereference());
1808 ir_dereference_array
*deref_array
= ir
->as_dereference_array();
1810 assert(!deref_array
->array
->type
->is_vector());
1813 /* Use the rvalue deref handler for the most part. We'll ignore
1814 * swizzles in it and write swizzles using writemask, though.
1817 return st_dst_reg(v
->result
);
1821 * Process the condition of a conditional assignment
1823 * Examines the condition of a conditional assignment to generate the optimal
1824 * first operand of a \c CMP instruction. If the condition is a relational
1825 * operator with 0 (e.g., \c ir_binop_less), the value being compared will be
1826 * used as the source for the \c CMP instruction. Otherwise the comparison
1827 * is processed to a boolean result, and the boolean result is used as the
1828 * operand to the CMP instruction.
1831 glsl_to_tgsi_visitor::process_move_condition(ir_rvalue
*ir
)
1833 ir_rvalue
*src_ir
= ir
;
1835 bool switch_order
= false;
1837 ir_expression
*const expr
= ir
->as_expression();
1838 if ((expr
!= NULL
) && (expr
->get_num_operands() == 2)) {
1839 bool zero_on_left
= false;
1841 if (expr
->operands
[0]->is_zero()) {
1842 src_ir
= expr
->operands
[1];
1843 zero_on_left
= true;
1844 } else if (expr
->operands
[1]->is_zero()) {
1845 src_ir
= expr
->operands
[0];
1846 zero_on_left
= false;
1850 * (a < 0) T F F ( a < 0) T F F
1851 * (0 < a) F F T (-a < 0) F F T
1852 * (a <= 0) T T F (-a < 0) F F T (swap order of other operands)
1853 * (0 <= a) F T T ( a < 0) T F F (swap order of other operands)
1854 * (a > 0) F F T (-a < 0) F F T
1855 * (0 > a) T F F ( a < 0) T F F
1856 * (a >= 0) F T T ( a < 0) T F F (swap order of other operands)
1857 * (0 >= a) T T F (-a < 0) F F T (swap order of other operands)
1859 * Note that exchanging the order of 0 and 'a' in the comparison simply
1860 * means that the value of 'a' should be negated.
1863 switch (expr
->operation
) {
1865 switch_order
= false;
1866 negate
= zero_on_left
;
1869 case ir_binop_greater
:
1870 switch_order
= false;
1871 negate
= !zero_on_left
;
1874 case ir_binop_lequal
:
1875 switch_order
= true;
1876 negate
= !zero_on_left
;
1879 case ir_binop_gequal
:
1880 switch_order
= true;
1881 negate
= zero_on_left
;
1885 /* This isn't the right kind of comparison afterall, so make sure
1886 * the whole condition is visited.
1894 src_ir
->accept(this);
1896 /* We use the TGSI_OPCODE_CMP (a < 0 ? b : c) for conditional moves, and the
1897 * condition we produced is 0.0 or 1.0. By flipping the sign, we can
1898 * choose which value TGSI_OPCODE_CMP produces without an extra instruction
1899 * computing the condition.
1902 this->result
.negate
= ~this->result
.negate
;
1904 return switch_order
;
1908 glsl_to_tgsi_visitor::visit(ir_assignment
*ir
)
1914 ir
->rhs
->accept(this);
1917 l
= get_assignment_lhs(ir
->lhs
, this);
1919 /* FINISHME: This should really set to the correct maximal writemask for each
1920 * FINISHME: component written (in the loops below). This case can only
1921 * FINISHME: occur for matrices, arrays, and structures.
1923 if (ir
->write_mask
== 0) {
1924 assert(!ir
->lhs
->type
->is_scalar() && !ir
->lhs
->type
->is_vector());
1925 l
.writemask
= WRITEMASK_XYZW
;
1926 } else if (ir
->lhs
->type
->is_scalar() &&
1927 ir
->lhs
->variable_referenced()->mode
== ir_var_out
) {
1928 /* FINISHME: This hack makes writing to gl_FragDepth, which lives in the
1929 * FINISHME: W component of fragment shader output zero, work correctly.
1931 l
.writemask
= WRITEMASK_XYZW
;
1934 int first_enabled_chan
= 0;
1937 l
.writemask
= ir
->write_mask
;
1939 for (int i
= 0; i
< 4; i
++) {
1940 if (l
.writemask
& (1 << i
)) {
1941 first_enabled_chan
= GET_SWZ(r
.swizzle
, i
);
1946 /* Swizzle a small RHS vector into the channels being written.
1948 * glsl ir treats write_mask as dictating how many channels are
1949 * present on the RHS while TGSI treats write_mask as just
1950 * showing which channels of the vec4 RHS get written.
1952 for (int i
= 0; i
< 4; i
++) {
1953 if (l
.writemask
& (1 << i
))
1954 swizzles
[i
] = GET_SWZ(r
.swizzle
, rhs_chan
++);
1956 swizzles
[i
] = first_enabled_chan
;
1958 r
.swizzle
= MAKE_SWIZZLE4(swizzles
[0], swizzles
[1],
1959 swizzles
[2], swizzles
[3]);
1962 assert(l
.file
!= PROGRAM_UNDEFINED
);
1963 assert(r
.file
!= PROGRAM_UNDEFINED
);
1965 if (ir
->condition
) {
1966 const bool switch_order
= this->process_move_condition(ir
->condition
);
1967 st_src_reg condition
= this->result
;
1969 for (i
= 0; i
< type_size(ir
->lhs
->type
); i
++) {
1970 st_src_reg l_src
= st_src_reg(l
);
1971 l_src
.swizzle
= swizzle_for_size(ir
->lhs
->type
->vector_elements
);
1974 emit(ir
, TGSI_OPCODE_CMP
, l
, condition
, l_src
, r
);
1976 emit(ir
, TGSI_OPCODE_CMP
, l
, condition
, r
, l_src
);
1982 } else if (ir
->rhs
->as_expression() &&
1983 this->instructions
.get_tail() &&
1984 ir
->rhs
== ((glsl_to_tgsi_instruction
*)this->instructions
.get_tail())->ir
&&
1985 type_size(ir
->lhs
->type
) == 1) {
1986 /* To avoid emitting an extra MOV when assigning an expression to a
1987 * variable, emit the last instruction of the expression again, but
1988 * replace the destination register with the target of the assignment.
1989 * Dead code elimination will remove the original instruction.
1991 glsl_to_tgsi_instruction
*inst
;
1992 inst
= (glsl_to_tgsi_instruction
*)this->instructions
.get_tail();
1993 emit(ir
, inst
->op
, l
, inst
->src
[0], inst
->src
[1], inst
->src
[2]);
1995 for (i
= 0; i
< type_size(ir
->lhs
->type
); i
++) {
1996 emit(ir
, TGSI_OPCODE_MOV
, l
, r
);
2005 glsl_to_tgsi_visitor::visit(ir_constant
*ir
)
2008 GLfloat stack_vals
[4] = { 0 };
2009 gl_constant_value
*values
= (gl_constant_value
*) stack_vals
;
2010 GLenum gl_type
= GL_NONE
;
2012 static int in_array
= 0;
2013 gl_register_file file
= in_array
? PROGRAM_CONSTANT
: PROGRAM_IMMEDIATE
;
2015 /* Unfortunately, 4 floats is all we can get into
2016 * _mesa_add_typed_unnamed_constant. So, make a temp to store an
2017 * aggregate constant and move each constant value into it. If we
2018 * get lucky, copy propagation will eliminate the extra moves.
2020 if (ir
->type
->base_type
== GLSL_TYPE_STRUCT
) {
2021 st_src_reg temp_base
= get_temp(ir
->type
);
2022 st_dst_reg temp
= st_dst_reg(temp_base
);
2024 foreach_iter(exec_list_iterator
, iter
, ir
->components
) {
2025 ir_constant
*field_value
= (ir_constant
*)iter
.get();
2026 int size
= type_size(field_value
->type
);
2030 field_value
->accept(this);
2033 for (i
= 0; i
< (unsigned int)size
; i
++) {
2034 emit(ir
, TGSI_OPCODE_MOV
, temp
, src
);
2040 this->result
= temp_base
;
2044 if (ir
->type
->is_array()) {
2045 st_src_reg temp_base
= get_temp(ir
->type
);
2046 st_dst_reg temp
= st_dst_reg(temp_base
);
2047 int size
= type_size(ir
->type
->fields
.array
);
2052 for (i
= 0; i
< ir
->type
->length
; i
++) {
2053 ir
->array_elements
[i
]->accept(this);
2055 for (int j
= 0; j
< size
; j
++) {
2056 emit(ir
, TGSI_OPCODE_MOV
, temp
, src
);
2062 this->result
= temp_base
;
2067 if (ir
->type
->is_matrix()) {
2068 st_src_reg mat
= get_temp(ir
->type
);
2069 st_dst_reg mat_column
= st_dst_reg(mat
);
2071 for (i
= 0; i
< ir
->type
->matrix_columns
; i
++) {
2072 assert(ir
->type
->base_type
== GLSL_TYPE_FLOAT
);
2073 values
= (gl_constant_value
*) &ir
->value
.f
[i
* ir
->type
->vector_elements
];
2075 src
= st_src_reg(file
, -1, ir
->type
->base_type
);
2076 src
.index
= add_constant(file
,
2078 ir
->type
->vector_elements
,
2081 emit(ir
, TGSI_OPCODE_MOV
, mat_column
, src
);
2090 switch (ir
->type
->base_type
) {
2091 case GLSL_TYPE_FLOAT
:
2093 for (i
= 0; i
< ir
->type
->vector_elements
; i
++) {
2094 values
[i
].f
= ir
->value
.f
[i
];
2097 case GLSL_TYPE_UINT
:
2098 gl_type
= glsl_version
>= 130 ? GL_UNSIGNED_INT
: GL_FLOAT
;
2099 for (i
= 0; i
< ir
->type
->vector_elements
; i
++) {
2100 if (glsl_version
>= 130)
2101 values
[i
].u
= ir
->value
.u
[i
];
2103 values
[i
].f
= ir
->value
.u
[i
];
2107 gl_type
= glsl_version
>= 130 ? GL_INT
: GL_FLOAT
;
2108 for (i
= 0; i
< ir
->type
->vector_elements
; i
++) {
2109 if (glsl_version
>= 130)
2110 values
[i
].i
= ir
->value
.i
[i
];
2112 values
[i
].f
= ir
->value
.i
[i
];
2115 case GLSL_TYPE_BOOL
:
2116 gl_type
= glsl_version
>= 130 ? GL_BOOL
: GL_FLOAT
;
2117 for (i
= 0; i
< ir
->type
->vector_elements
; i
++) {
2118 if (glsl_version
>= 130)
2119 values
[i
].b
= ir
->value
.b
[i
];
2121 values
[i
].f
= ir
->value
.b
[i
];
2125 assert(!"Non-float/uint/int/bool constant");
2128 this->result
= st_src_reg(file
, -1, ir
->type
);
2129 this->result
.index
= add_constant(file
,
2131 ir
->type
->vector_elements
,
2133 &this->result
.swizzle
);
2137 glsl_to_tgsi_visitor::get_function_signature(ir_function_signature
*sig
)
2139 function_entry
*entry
;
2141 foreach_iter(exec_list_iterator
, iter
, this->function_signatures
) {
2142 entry
= (function_entry
*)iter
.get();
2144 if (entry
->sig
== sig
)
2148 entry
= ralloc(mem_ctx
, function_entry
);
2150 entry
->sig_id
= this->next_signature_id
++;
2151 entry
->bgn_inst
= NULL
;
2153 /* Allocate storage for all the parameters. */
2154 foreach_iter(exec_list_iterator
, iter
, sig
->parameters
) {
2155 ir_variable
*param
= (ir_variable
*)iter
.get();
2156 variable_storage
*storage
;
2158 storage
= find_variable_storage(param
);
2161 storage
= new(mem_ctx
) variable_storage(param
, PROGRAM_TEMPORARY
,
2163 this->variables
.push_tail(storage
);
2165 this->next_temp
+= type_size(param
->type
);
2168 if (!sig
->return_type
->is_void()) {
2169 entry
->return_reg
= get_temp(sig
->return_type
);
2171 entry
->return_reg
= undef_src
;
2174 this->function_signatures
.push_tail(entry
);
2179 glsl_to_tgsi_visitor::visit(ir_call
*ir
)
2181 glsl_to_tgsi_instruction
*call_inst
;
2182 ir_function_signature
*sig
= ir
->get_callee();
2183 function_entry
*entry
= get_function_signature(sig
);
2186 /* Process in parameters. */
2187 exec_list_iterator sig_iter
= sig
->parameters
.iterator();
2188 foreach_iter(exec_list_iterator
, iter
, *ir
) {
2189 ir_rvalue
*param_rval
= (ir_rvalue
*)iter
.get();
2190 ir_variable
*param
= (ir_variable
*)sig_iter
.get();
2192 if (param
->mode
== ir_var_in
||
2193 param
->mode
== ir_var_inout
) {
2194 variable_storage
*storage
= find_variable_storage(param
);
2197 param_rval
->accept(this);
2198 st_src_reg r
= this->result
;
2201 l
.file
= storage
->file
;
2202 l
.index
= storage
->index
;
2204 l
.writemask
= WRITEMASK_XYZW
;
2205 l
.cond_mask
= COND_TR
;
2207 for (i
= 0; i
< type_size(param
->type
); i
++) {
2208 emit(ir
, TGSI_OPCODE_MOV
, l
, r
);
2216 assert(!sig_iter
.has_next());
2218 /* Emit call instruction */
2219 call_inst
= emit(ir
, TGSI_OPCODE_CAL
);
2220 call_inst
->function
= entry
;
2222 /* Process out parameters. */
2223 sig_iter
= sig
->parameters
.iterator();
2224 foreach_iter(exec_list_iterator
, iter
, *ir
) {
2225 ir_rvalue
*param_rval
= (ir_rvalue
*)iter
.get();
2226 ir_variable
*param
= (ir_variable
*)sig_iter
.get();
2228 if (param
->mode
== ir_var_out
||
2229 param
->mode
== ir_var_inout
) {
2230 variable_storage
*storage
= find_variable_storage(param
);
2234 r
.file
= storage
->file
;
2235 r
.index
= storage
->index
;
2237 r
.swizzle
= SWIZZLE_NOOP
;
2240 param_rval
->accept(this);
2241 st_dst_reg l
= st_dst_reg(this->result
);
2243 for (i
= 0; i
< type_size(param
->type
); i
++) {
2244 emit(ir
, TGSI_OPCODE_MOV
, l
, r
);
2252 assert(!sig_iter
.has_next());
2254 /* Process return value. */
2255 this->result
= entry
->return_reg
;
2259 glsl_to_tgsi_visitor::visit(ir_texture
*ir
)
2261 st_src_reg result_src
, coord
, lod_info
, projector
, dx
, dy
;
2262 st_dst_reg result_dst
, coord_dst
;
2263 glsl_to_tgsi_instruction
*inst
= NULL
;
2264 unsigned opcode
= TGSI_OPCODE_NOP
;
2266 ir
->coordinate
->accept(this);
2268 /* Put our coords in a temp. We'll need to modify them for shadow,
2269 * projection, or LOD, so the only case we'd use it as is is if
2270 * we're doing plain old texturing. The optimization passes on
2271 * glsl_to_tgsi_visitor should handle cleaning up our mess in that case.
2273 coord
= get_temp(glsl_type::vec4_type
);
2274 coord_dst
= st_dst_reg(coord
);
2275 emit(ir
, TGSI_OPCODE_MOV
, coord_dst
, this->result
);
2277 if (ir
->projector
) {
2278 ir
->projector
->accept(this);
2279 projector
= this->result
;
2282 /* Storage for our result. Ideally for an assignment we'd be using
2283 * the actual storage for the result here, instead.
2285 result_src
= get_temp(glsl_type::vec4_type
);
2286 result_dst
= st_dst_reg(result_src
);
2290 opcode
= TGSI_OPCODE_TEX
;
2293 opcode
= TGSI_OPCODE_TXB
;
2294 ir
->lod_info
.bias
->accept(this);
2295 lod_info
= this->result
;
2298 opcode
= TGSI_OPCODE_TXL
;
2299 ir
->lod_info
.lod
->accept(this);
2300 lod_info
= this->result
;
2303 opcode
= TGSI_OPCODE_TXD
;
2304 ir
->lod_info
.grad
.dPdx
->accept(this);
2306 ir
->lod_info
.grad
.dPdy
->accept(this);
2309 case ir_txf
: /* TODO: use TGSI_OPCODE_TXF here */
2310 assert(!"GLSL 1.30 features unsupported");
2314 if (ir
->projector
) {
2315 if (opcode
== TGSI_OPCODE_TEX
) {
2316 /* Slot the projector in as the last component of the coord. */
2317 coord_dst
.writemask
= WRITEMASK_W
;
2318 emit(ir
, TGSI_OPCODE_MOV
, coord_dst
, projector
);
2319 coord_dst
.writemask
= WRITEMASK_XYZW
;
2320 opcode
= TGSI_OPCODE_TXP
;
2322 st_src_reg coord_w
= coord
;
2323 coord_w
.swizzle
= SWIZZLE_WWWW
;
2325 /* For the other TEX opcodes there's no projective version
2326 * since the last slot is taken up by LOD info. Do the
2327 * projective divide now.
2329 coord_dst
.writemask
= WRITEMASK_W
;
2330 emit(ir
, TGSI_OPCODE_RCP
, coord_dst
, projector
);
2332 /* In the case where we have to project the coordinates "by hand,"
2333 * the shadow comparator value must also be projected.
2335 st_src_reg tmp_src
= coord
;
2336 if (ir
->shadow_comparitor
) {
2337 /* Slot the shadow value in as the second to last component of the
2340 ir
->shadow_comparitor
->accept(this);
2342 tmp_src
= get_temp(glsl_type::vec4_type
);
2343 st_dst_reg tmp_dst
= st_dst_reg(tmp_src
);
2345 tmp_dst
.writemask
= WRITEMASK_Z
;
2346 emit(ir
, TGSI_OPCODE_MOV
, tmp_dst
, this->result
);
2348 tmp_dst
.writemask
= WRITEMASK_XY
;
2349 emit(ir
, TGSI_OPCODE_MOV
, tmp_dst
, coord
);
2352 coord_dst
.writemask
= WRITEMASK_XYZ
;
2353 emit(ir
, TGSI_OPCODE_MUL
, coord_dst
, tmp_src
, coord_w
);
2355 coord_dst
.writemask
= WRITEMASK_XYZW
;
2356 coord
.swizzle
= SWIZZLE_XYZW
;
2360 /* If projection is done and the opcode is not TGSI_OPCODE_TXP, then the shadow
2361 * comparator was put in the correct place (and projected) by the code,
2362 * above, that handles by-hand projection.
2364 if (ir
->shadow_comparitor
&& (!ir
->projector
|| opcode
== TGSI_OPCODE_TXP
)) {
2365 /* Slot the shadow value in as the second to last component of the
2368 ir
->shadow_comparitor
->accept(this);
2369 coord_dst
.writemask
= WRITEMASK_Z
;
2370 emit(ir
, TGSI_OPCODE_MOV
, coord_dst
, this->result
);
2371 coord_dst
.writemask
= WRITEMASK_XYZW
;
2374 if (opcode
== TGSI_OPCODE_TXL
|| opcode
== TGSI_OPCODE_TXB
) {
2375 /* TGSI stores LOD or LOD bias in the last channel of the coords. */
2376 coord_dst
.writemask
= WRITEMASK_W
;
2377 emit(ir
, TGSI_OPCODE_MOV
, coord_dst
, lod_info
);
2378 coord_dst
.writemask
= WRITEMASK_XYZW
;
2381 if (opcode
== TGSI_OPCODE_TXD
)
2382 inst
= emit(ir
, opcode
, result_dst
, coord
, dx
, dy
);
2384 inst
= emit(ir
, opcode
, result_dst
, coord
);
2386 if (ir
->shadow_comparitor
)
2387 inst
->tex_shadow
= GL_TRUE
;
2389 inst
->sampler
= _mesa_get_sampler_uniform_value(ir
->sampler
,
2390 this->shader_program
,
2393 const glsl_type
*sampler_type
= ir
->sampler
->type
;
2395 switch (sampler_type
->sampler_dimensionality
) {
2396 case GLSL_SAMPLER_DIM_1D
:
2397 inst
->tex_target
= (sampler_type
->sampler_array
)
2398 ? TEXTURE_1D_ARRAY_INDEX
: TEXTURE_1D_INDEX
;
2400 case GLSL_SAMPLER_DIM_2D
:
2401 inst
->tex_target
= (sampler_type
->sampler_array
)
2402 ? TEXTURE_2D_ARRAY_INDEX
: TEXTURE_2D_INDEX
;
2404 case GLSL_SAMPLER_DIM_3D
:
2405 inst
->tex_target
= TEXTURE_3D_INDEX
;
2407 case GLSL_SAMPLER_DIM_CUBE
:
2408 inst
->tex_target
= TEXTURE_CUBE_INDEX
;
2410 case GLSL_SAMPLER_DIM_RECT
:
2411 inst
->tex_target
= TEXTURE_RECT_INDEX
;
2413 case GLSL_SAMPLER_DIM_BUF
:
2414 assert(!"FINISHME: Implement ARB_texture_buffer_object");
2417 assert(!"Should not get here.");
2420 this->result
= result_src
;
2424 glsl_to_tgsi_visitor::visit(ir_return
*ir
)
2426 if (ir
->get_value()) {
2430 assert(current_function
);
2432 ir
->get_value()->accept(this);
2433 st_src_reg r
= this->result
;
2435 l
= st_dst_reg(current_function
->return_reg
);
2437 for (i
= 0; i
< type_size(current_function
->sig
->return_type
); i
++) {
2438 emit(ir
, TGSI_OPCODE_MOV
, l
, r
);
2444 emit(ir
, TGSI_OPCODE_RET
);
2448 glsl_to_tgsi_visitor::visit(ir_discard
*ir
)
2450 struct gl_fragment_program
*fp
= (struct gl_fragment_program
*)this->prog
;
2452 if (ir
->condition
) {
2453 ir
->condition
->accept(this);
2454 this->result
.negate
= ~this->result
.negate
;
2455 emit(ir
, TGSI_OPCODE_KIL
, undef_dst
, this->result
);
2457 emit(ir
, TGSI_OPCODE_KILP
);
2460 fp
->UsesKill
= GL_TRUE
;
2464 glsl_to_tgsi_visitor::visit(ir_if
*ir
)
2466 glsl_to_tgsi_instruction
*cond_inst
, *if_inst
, *else_inst
= NULL
;
2467 glsl_to_tgsi_instruction
*prev_inst
;
2469 prev_inst
= (glsl_to_tgsi_instruction
*)this->instructions
.get_tail();
2471 ir
->condition
->accept(this);
2472 assert(this->result
.file
!= PROGRAM_UNDEFINED
);
2474 if (this->options
->EmitCondCodes
) {
2475 cond_inst
= (glsl_to_tgsi_instruction
*)this->instructions
.get_tail();
2477 /* See if we actually generated any instruction for generating
2478 * the condition. If not, then cook up a move to a temp so we
2479 * have something to set cond_update on.
2481 if (cond_inst
== prev_inst
) {
2482 st_src_reg temp
= get_temp(glsl_type::bool_type
);
2483 cond_inst
= emit(ir
->condition
, TGSI_OPCODE_MOV
, st_dst_reg(temp
), result
);
2485 cond_inst
->cond_update
= GL_TRUE
;
2487 if_inst
= emit(ir
->condition
, TGSI_OPCODE_IF
);
2488 if_inst
->dst
.cond_mask
= COND_NE
;
2490 if_inst
= emit(ir
->condition
, TGSI_OPCODE_IF
, undef_dst
, this->result
);
2493 this->instructions
.push_tail(if_inst
);
2495 visit_exec_list(&ir
->then_instructions
, this);
2497 if (!ir
->else_instructions
.is_empty()) {
2498 else_inst
= emit(ir
->condition
, TGSI_OPCODE_ELSE
);
2499 visit_exec_list(&ir
->else_instructions
, this);
2502 if_inst
= emit(ir
->condition
, TGSI_OPCODE_ENDIF
);
2505 glsl_to_tgsi_visitor::glsl_to_tgsi_visitor()
2507 result
.file
= PROGRAM_UNDEFINED
;
2509 next_signature_id
= 1;
2511 current_function
= NULL
;
2512 num_address_regs
= 0;
2513 indirect_addr_temps
= false;
2514 indirect_addr_consts
= false;
2515 mem_ctx
= ralloc_context(NULL
);
2518 glsl_to_tgsi_visitor::~glsl_to_tgsi_visitor()
2520 ralloc_free(mem_ctx
);
2523 extern "C" void free_glsl_to_tgsi_visitor(glsl_to_tgsi_visitor
*v
)
2530 * Count resources used by the given gpu program (number of texture
2534 count_resources(glsl_to_tgsi_visitor
*v
, gl_program
*prog
)
2536 v
->samplers_used
= 0;
2538 foreach_iter(exec_list_iterator
, iter
, v
->instructions
) {
2539 glsl_to_tgsi_instruction
*inst
= (glsl_to_tgsi_instruction
*)iter
.get();
2541 if (is_tex_instruction(inst
->op
)) {
2542 v
->samplers_used
|= 1 << inst
->sampler
;
2544 prog
->SamplerTargets
[inst
->sampler
] =
2545 (gl_texture_index
)inst
->tex_target
;
2546 if (inst
->tex_shadow
) {
2547 prog
->ShadowSamplers
|= 1 << inst
->sampler
;
2552 prog
->SamplersUsed
= v
->samplers_used
;
2553 _mesa_update_shader_textures_used(prog
);
2558 * Check if the given vertex/fragment/shader program is within the
2559 * resource limits of the context (number of texture units, etc).
2560 * If any of those checks fail, record a linker error.
2562 * XXX more checks are needed...
2565 check_resources(const struct gl_context
*ctx
,
2566 struct gl_shader_program
*shader_program
,
2567 glsl_to_tgsi_visitor
*prog
,
2568 struct gl_program
*proginfo
)
2570 switch (proginfo
->Target
) {
2571 case GL_VERTEX_PROGRAM_ARB
:
2572 if (_mesa_bitcount(prog
->samplers_used
) >
2573 ctx
->Const
.MaxVertexTextureImageUnits
) {
2574 fail_link(shader_program
, "Too many vertex shader texture samplers");
2576 if (proginfo
->Parameters
->NumParameters
> MAX_UNIFORMS
) {
2577 fail_link(shader_program
, "Too many vertex shader constants");
2580 case MESA_GEOMETRY_PROGRAM
:
2581 if (_mesa_bitcount(prog
->samplers_used
) >
2582 ctx
->Const
.MaxGeometryTextureImageUnits
) {
2583 fail_link(shader_program
, "Too many geometry shader texture samplers");
2585 if (proginfo
->Parameters
->NumParameters
>
2586 MAX_GEOMETRY_UNIFORM_COMPONENTS
/ 4) {
2587 fail_link(shader_program
, "Too many geometry shader constants");
2590 case GL_FRAGMENT_PROGRAM_ARB
:
2591 if (_mesa_bitcount(prog
->samplers_used
) >
2592 ctx
->Const
.MaxTextureImageUnits
) {
2593 fail_link(shader_program
, "Too many fragment shader texture samplers");
2595 if (proginfo
->Parameters
->NumParameters
> MAX_UNIFORMS
) {
2596 fail_link(shader_program
, "Too many fragment shader constants");
2600 _mesa_problem(ctx
, "unexpected program type in check_resources()");
2606 struct uniform_sort
{
2607 struct gl_uniform
*u
;
2611 /* The shader_program->Uniforms list is almost sorted in increasing
2612 * uniform->{Frag,Vert}Pos locations, but not quite when there are
2613 * uniforms shared between targets. We need to add parameters in
2614 * increasing order for the targets.
2617 sort_uniforms(const void *a
, const void *b
)
2619 struct uniform_sort
*u1
= (struct uniform_sort
*)a
;
2620 struct uniform_sort
*u2
= (struct uniform_sort
*)b
;
2622 return u1
->pos
- u2
->pos
;
2625 /* Add the uniforms to the parameters. The linker chose locations
2626 * in our parameters lists (which weren't created yet), which the
2627 * uniforms code will use to poke values into our parameters list
2628 * when uniforms are updated.
2631 add_uniforms_to_parameters_list(struct gl_shader_program
*shader_program
,
2632 struct gl_shader
*shader
,
2633 struct gl_program
*prog
)
2636 unsigned int next_sampler
= 0, num_uniforms
= 0;
2637 struct uniform_sort
*sorted_uniforms
;
2639 sorted_uniforms
= ralloc_array(NULL
, struct uniform_sort
,
2640 shader_program
->Uniforms
->NumUniforms
);
2642 for (i
= 0; i
< shader_program
->Uniforms
->NumUniforms
; i
++) {
2643 struct gl_uniform
*uniform
= shader_program
->Uniforms
->Uniforms
+ i
;
2644 int parameter_index
= -1;
2646 switch (shader
->Type
) {
2647 case GL_VERTEX_SHADER
:
2648 parameter_index
= uniform
->VertPos
;
2650 case GL_FRAGMENT_SHADER
:
2651 parameter_index
= uniform
->FragPos
;
2653 case GL_GEOMETRY_SHADER
:
2654 parameter_index
= uniform
->GeomPos
;
2658 /* Only add uniforms used in our target. */
2659 if (parameter_index
!= -1) {
2660 sorted_uniforms
[num_uniforms
].pos
= parameter_index
;
2661 sorted_uniforms
[num_uniforms
].u
= uniform
;
2666 qsort(sorted_uniforms
, num_uniforms
, sizeof(struct uniform_sort
),
2669 for (i
= 0; i
< num_uniforms
; i
++) {
2670 struct gl_uniform
*uniform
= sorted_uniforms
[i
].u
;
2671 int parameter_index
= sorted_uniforms
[i
].pos
;
2672 const glsl_type
*type
= uniform
->Type
;
2675 if (type
->is_vector() ||
2676 type
->is_scalar()) {
2677 size
= type
->vector_elements
;
2679 size
= type_size(type
) * 4;
2682 gl_register_file file
;
2683 if (type
->is_sampler() ||
2684 (type
->is_array() && type
->fields
.array
->is_sampler())) {
2685 file
= PROGRAM_SAMPLER
;
2687 file
= PROGRAM_UNIFORM
;
2690 GLint index
= _mesa_lookup_parameter_index(prog
->Parameters
, -1,
2694 index
= _mesa_add_parameter(prog
->Parameters
, file
,
2695 uniform
->Name
, size
, type
->gl_type
,
2698 /* Sampler uniform values are stored in prog->SamplerUnits,
2699 * and the entry in that array is selected by this index we
2700 * store in ParameterValues[].
2702 if (file
== PROGRAM_SAMPLER
) {
2703 for (unsigned int j
= 0; j
< size
/ 4; j
++)
2704 prog
->Parameters
->ParameterValues
[index
+ j
][0].f
= next_sampler
++;
2707 /* The location chosen in the Parameters list here (returned
2708 * from _mesa_add_uniform) has to match what the linker chose.
2710 if (index
!= parameter_index
) {
2711 fail_link(shader_program
, "Allocation of uniform `%s' to target "
2712 "failed (%d vs %d)\n",
2713 uniform
->Name
, index
, parameter_index
);
2718 ralloc_free(sorted_uniforms
);
2722 set_uniform_initializer(struct gl_context
*ctx
, void *mem_ctx
,
2723 struct gl_shader_program
*shader_program
,
2724 const char *name
, const glsl_type
*type
,
2727 if (type
->is_record()) {
2728 ir_constant
*field_constant
;
2730 field_constant
= (ir_constant
*)val
->components
.get_head();
2732 for (unsigned int i
= 0; i
< type
->length
; i
++) {
2733 const glsl_type
*field_type
= type
->fields
.structure
[i
].type
;
2734 const char *field_name
= ralloc_asprintf(mem_ctx
, "%s.%s", name
,
2735 type
->fields
.structure
[i
].name
);
2736 set_uniform_initializer(ctx
, mem_ctx
, shader_program
, field_name
,
2737 field_type
, field_constant
);
2738 field_constant
= (ir_constant
*)field_constant
->next
;
2743 int loc
= _mesa_get_uniform_location(ctx
, shader_program
, name
);
2746 fail_link(shader_program
,
2747 "Couldn't find uniform for initializer %s\n", name
);
2751 for (unsigned int i
= 0; i
< (type
->is_array() ? type
->length
: 1); i
++) {
2752 ir_constant
*element
;
2753 const glsl_type
*element_type
;
2754 if (type
->is_array()) {
2755 element
= val
->array_elements
[i
];
2756 element_type
= type
->fields
.array
;
2759 element_type
= type
;
2764 if (element_type
->base_type
== GLSL_TYPE_BOOL
) {
2765 int *conv
= ralloc_array(mem_ctx
, int, element_type
->components());
2766 for (unsigned int j
= 0; j
< element_type
->components(); j
++) {
2767 conv
[j
] = element
->value
.b
[j
];
2769 values
= (void *)conv
;
2770 element_type
= glsl_type::get_instance(GLSL_TYPE_INT
,
2771 element_type
->vector_elements
,
2774 values
= &element
->value
;
2777 if (element_type
->is_matrix()) {
2778 _mesa_uniform_matrix(ctx
, shader_program
,
2779 element_type
->matrix_columns
,
2780 element_type
->vector_elements
,
2781 loc
, 1, GL_FALSE
, (GLfloat
*)values
);
2782 loc
+= element_type
->matrix_columns
;
2784 _mesa_uniform(ctx
, shader_program
, loc
, element_type
->matrix_columns
,
2785 values
, element_type
->gl_type
);
2786 loc
+= type_size(element_type
);
2792 set_uniform_initializers(struct gl_context
*ctx
,
2793 struct gl_shader_program
*shader_program
)
2795 void *mem_ctx
= NULL
;
2797 for (unsigned int i
= 0; i
< MESA_SHADER_TYPES
; i
++) {
2798 struct gl_shader
*shader
= shader_program
->_LinkedShaders
[i
];
2803 foreach_iter(exec_list_iterator
, iter
, *shader
->ir
) {
2804 ir_instruction
*ir
= (ir_instruction
*)iter
.get();
2805 ir_variable
*var
= ir
->as_variable();
2807 if (!var
|| var
->mode
!= ir_var_uniform
|| !var
->constant_value
)
2811 mem_ctx
= ralloc_context(NULL
);
2813 set_uniform_initializer(ctx
, mem_ctx
, shader_program
, var
->name
,
2814 var
->type
, var
->constant_value
);
2818 ralloc_free(mem_ctx
);
2822 * Scan/rewrite program to remove reads of custom (output) registers.
2823 * The passed type has to be either PROGRAM_OUTPUT or PROGRAM_VARYING
2824 * (for vertex shaders).
2825 * In GLSL shaders, varying vars can be read and written.
2826 * On some hardware, trying to read an output register causes trouble.
2827 * So, rewrite the program to use a temporary register in this case.
2829 * Based on _mesa_remove_output_reads from programopt.c.
2832 glsl_to_tgsi_visitor::remove_output_reads(gl_register_file type
)
2835 GLint outputMap
[VERT_RESULT_MAX
];
2836 GLint outputTypes
[VERT_RESULT_MAX
];
2837 GLuint numVaryingReads
= 0;
2838 GLboolean usedTemps
[MAX_TEMPS
];
2839 GLuint firstTemp
= 0;
2841 _mesa_find_used_registers(prog
, PROGRAM_TEMPORARY
,
2842 usedTemps
, MAX_TEMPS
);
2844 assert(type
== PROGRAM_VARYING
|| type
== PROGRAM_OUTPUT
);
2845 assert(prog
->Target
== GL_VERTEX_PROGRAM_ARB
|| type
!= PROGRAM_VARYING
);
2847 for (i
= 0; i
< VERT_RESULT_MAX
; i
++)
2850 /* look for instructions which read from varying vars */
2851 foreach_iter(exec_list_iterator
, iter
, this->instructions
) {
2852 glsl_to_tgsi_instruction
*inst
= (glsl_to_tgsi_instruction
*)iter
.get();
2853 const GLuint numSrc
= num_inst_src_regs(inst
->op
);
2855 for (j
= 0; j
< numSrc
; j
++) {
2856 if (inst
->src
[j
].file
== type
) {
2857 /* replace the read with a temp reg */
2858 const GLuint var
= inst
->src
[j
].index
;
2859 if (outputMap
[var
] == -1) {
2861 outputMap
[var
] = _mesa_find_free_register(usedTemps
,
2864 outputTypes
[var
] = inst
->src
[j
].type
;
2865 firstTemp
= outputMap
[var
] + 1;
2867 inst
->src
[j
].file
= PROGRAM_TEMPORARY
;
2868 inst
->src
[j
].index
= outputMap
[var
];
2873 if (numVaryingReads
== 0)
2874 return; /* nothing to be done */
2876 /* look for instructions which write to the varying vars identified above */
2877 foreach_iter(exec_list_iterator
, iter
, this->instructions
) {
2878 glsl_to_tgsi_instruction
*inst
= (glsl_to_tgsi_instruction
*)iter
.get();
2879 if (inst
->dst
.file
== type
&& outputMap
[inst
->dst
.index
] >= 0) {
2880 /* change inst to write to the temp reg, instead of the varying */
2881 inst
->dst
.file
= PROGRAM_TEMPORARY
;
2882 inst
->dst
.index
= outputMap
[inst
->dst
.index
];
2886 /* insert new MOV instructions at the end */
2887 for (i
= 0; i
< VERT_RESULT_MAX
; i
++) {
2888 if (outputMap
[i
] >= 0) {
2889 /* MOV VAR[i], TEMP[tmp]; */
2890 st_src_reg src
= st_src_reg(PROGRAM_TEMPORARY
, outputMap
[i
], outputTypes
[i
]);
2891 st_dst_reg dst
= st_dst_reg(type
, WRITEMASK_XYZW
, outputTypes
[i
]);
2893 this->emit(NULL
, TGSI_OPCODE_MOV
, dst
, src
);
2899 * Returns the mask of channels (bitmask of WRITEMASK_X,Y,Z,W) which
2900 * are read from the given src in this instruction
2903 get_src_arg_mask(st_dst_reg dst
, st_src_reg src
)
2905 int read_mask
= 0, comp
;
2907 /* Now, given the src swizzle and the written channels, find which
2908 * components are actually read
2910 for (comp
= 0; comp
< 4; ++comp
) {
2911 const unsigned coord
= GET_SWZ(src
.swizzle
, comp
);
2913 if (dst
.writemask
& (1 << comp
) && coord
<= SWIZZLE_W
)
2914 read_mask
|= 1 << coord
;
2921 * This pass replaces CMP T0, T1 T2 T0 with MOV T0, T2 when the CMP
2922 * instruction is the first instruction to write to register T0. There are
2923 * several lowering passes done in GLSL IR (e.g. branches and
2924 * relative addressing) that create a large number of conditional assignments
2925 * that ir_to_mesa converts to CMP instructions like the one mentioned above.
2927 * Here is why this conversion is safe:
2928 * CMP T0, T1 T2 T0 can be expanded to:
2934 * If (T1 < 0.0) evaluates to true then our replacement MOV T0, T2 is the same
2935 * as the original program. If (T1 < 0.0) evaluates to false, executing
2936 * MOV T0, T0 will store a garbage value in T0 since T0 is uninitialized.
2937 * Therefore, it doesn't matter that we are replacing MOV T0, T0 with MOV T0, T2
2938 * because any instruction that was going to read from T0 after this was going
2939 * to read a garbage value anyway.
2942 glsl_to_tgsi_visitor::simplify_cmp(void)
2944 unsigned tempWrites
[MAX_TEMPS
];
2945 unsigned outputWrites
[MAX_PROGRAM_OUTPUTS
];
2947 memset(tempWrites
, 0, sizeof(tempWrites
));
2948 memset(outputWrites
, 0, sizeof(outputWrites
));
2950 foreach_iter(exec_list_iterator
, iter
, this->instructions
) {
2951 glsl_to_tgsi_instruction
*inst
= (glsl_to_tgsi_instruction
*)iter
.get();
2952 unsigned prevWriteMask
= 0;
2954 /* Give up if we encounter relative addressing or flow control. */
2955 if (inst
->dst
.reladdr
||
2956 tgsi_get_opcode_info(inst
->op
)->is_branch
||
2957 inst
->op
== TGSI_OPCODE_BGNSUB
||
2958 inst
->op
== TGSI_OPCODE_CONT
||
2959 inst
->op
== TGSI_OPCODE_END
||
2960 inst
->op
== TGSI_OPCODE_ENDSUB
||
2961 inst
->op
== TGSI_OPCODE_RET
) {
2965 if (inst
->dst
.file
== PROGRAM_OUTPUT
) {
2966 assert(inst
->dst
.index
< MAX_PROGRAM_OUTPUTS
);
2967 prevWriteMask
= outputWrites
[inst
->dst
.index
];
2968 outputWrites
[inst
->dst
.index
] |= inst
->dst
.writemask
;
2969 } else if (inst
->dst
.file
== PROGRAM_TEMPORARY
) {
2970 assert(inst
->dst
.index
< MAX_TEMPS
);
2971 prevWriteMask
= tempWrites
[inst
->dst
.index
];
2972 tempWrites
[inst
->dst
.index
] |= inst
->dst
.writemask
;
2975 /* For a CMP to be considered a conditional write, the destination
2976 * register and source register two must be the same. */
2977 if (inst
->op
== TGSI_OPCODE_CMP
2978 && !(inst
->dst
.writemask
& prevWriteMask
)
2979 && inst
->src
[2].file
== inst
->dst
.file
2980 && inst
->src
[2].index
== inst
->dst
.index
2981 && inst
->dst
.writemask
== get_src_arg_mask(inst
->dst
, inst
->src
[2])) {
2983 inst
->op
= TGSI_OPCODE_MOV
;
2984 inst
->src
[0] = inst
->src
[1];
2989 /* Replaces all references to a temporary register index with another index. */
2991 glsl_to_tgsi_visitor::rename_temp_register(int index
, int new_index
)
2993 foreach_iter(exec_list_iterator
, iter
, this->instructions
) {
2994 glsl_to_tgsi_instruction
*inst
= (glsl_to_tgsi_instruction
*)iter
.get();
2997 for (j
=0; j
< num_inst_src_regs(inst
->op
); j
++) {
2998 if (inst
->src
[j
].file
== PROGRAM_TEMPORARY
&&
2999 inst
->src
[j
].index
== index
) {
3000 inst
->src
[j
].index
= new_index
;
3004 if (inst
->dst
.file
== PROGRAM_TEMPORARY
&& inst
->dst
.index
== index
) {
3005 inst
->dst
.index
= new_index
;
3011 glsl_to_tgsi_visitor::get_first_temp_read(int index
)
3013 int depth
= 0; /* loop depth */
3014 int loop_start
= -1; /* index of the first active BGNLOOP (if any) */
3017 foreach_iter(exec_list_iterator
, iter
, this->instructions
) {
3018 glsl_to_tgsi_instruction
*inst
= (glsl_to_tgsi_instruction
*)iter
.get();
3020 for (j
=0; j
< num_inst_src_regs(inst
->op
); j
++) {
3021 if (inst
->src
[j
].file
== PROGRAM_TEMPORARY
&&
3022 inst
->src
[j
].index
== index
) {
3023 return (depth
== 0) ? i
: loop_start
;
3027 if (inst
->op
== TGSI_OPCODE_BGNLOOP
) {
3030 } else if (inst
->op
== TGSI_OPCODE_ENDLOOP
) {
3043 glsl_to_tgsi_visitor::get_first_temp_write(int index
)
3045 int depth
= 0; /* loop depth */
3046 int loop_start
= -1; /* index of the first active BGNLOOP (if any) */
3049 foreach_iter(exec_list_iterator
, iter
, this->instructions
) {
3050 glsl_to_tgsi_instruction
*inst
= (glsl_to_tgsi_instruction
*)iter
.get();
3052 if (inst
->dst
.file
== PROGRAM_TEMPORARY
&& inst
->dst
.index
== index
) {
3053 return (depth
== 0) ? i
: loop_start
;
3056 if (inst
->op
== TGSI_OPCODE_BGNLOOP
) {
3059 } else if (inst
->op
== TGSI_OPCODE_ENDLOOP
) {
3072 glsl_to_tgsi_visitor::get_last_temp_read(int index
)
3074 int depth
= 0; /* loop depth */
3075 int last
= -1; /* index of last instruction that reads the temporary */
3078 foreach_iter(exec_list_iterator
, iter
, this->instructions
) {
3079 glsl_to_tgsi_instruction
*inst
= (glsl_to_tgsi_instruction
*)iter
.get();
3081 for (j
=0; j
< num_inst_src_regs(inst
->op
); j
++) {
3082 if (inst
->src
[j
].file
== PROGRAM_TEMPORARY
&&
3083 inst
->src
[j
].index
== index
) {
3084 last
= (depth
== 0) ? i
: -2;
3088 if (inst
->op
== TGSI_OPCODE_BGNLOOP
)
3090 else if (inst
->op
== TGSI_OPCODE_ENDLOOP
)
3091 if (--depth
== 0 && last
== -2)
3103 glsl_to_tgsi_visitor::get_last_temp_write(int index
)
3105 int depth
= 0; /* loop depth */
3106 int last
= -1; /* index of last instruction that writes to the temporary */
3109 foreach_iter(exec_list_iterator
, iter
, this->instructions
) {
3110 glsl_to_tgsi_instruction
*inst
= (glsl_to_tgsi_instruction
*)iter
.get();
3112 if (inst
->dst
.file
== PROGRAM_TEMPORARY
&& inst
->dst
.index
== index
)
3113 last
= (depth
== 0) ? i
: -2;
3115 if (inst
->op
== TGSI_OPCODE_BGNLOOP
)
3117 else if (inst
->op
== TGSI_OPCODE_ENDLOOP
)
3118 if (--depth
== 0 && last
== -2)
3130 * On a basic block basis, tracks available PROGRAM_TEMPORARY register
3131 * channels for copy propagation and updates following instructions to
3132 * use the original versions.
3134 * The glsl_to_tgsi_visitor lazily produces code assuming that this pass
3135 * will occur. As an example, a TXP production before this pass:
3137 * 0: MOV TEMP[1], INPUT[4].xyyy;
3138 * 1: MOV TEMP[1].w, INPUT[4].wwww;
3139 * 2: TXP TEMP[2], TEMP[1], texture[0], 2D;
3143 * 0: MOV TEMP[1], INPUT[4].xyyy;
3144 * 1: MOV TEMP[1].w, INPUT[4].wwww;
3145 * 2: TXP TEMP[2], INPUT[4].xyyw, texture[0], 2D;
3147 * which allows for dead code elimination on TEMP[1]'s writes.
3150 glsl_to_tgsi_visitor::copy_propagate(void)
3152 glsl_to_tgsi_instruction
**acp
= rzalloc_array(mem_ctx
,
3153 glsl_to_tgsi_instruction
*,
3154 this->next_temp
* 4);
3155 int *acp_level
= rzalloc_array(mem_ctx
, int, this->next_temp
* 4);
3158 foreach_iter(exec_list_iterator
, iter
, this->instructions
) {
3159 glsl_to_tgsi_instruction
*inst
= (glsl_to_tgsi_instruction
*)iter
.get();
3161 assert(inst
->dst
.file
!= PROGRAM_TEMPORARY
3162 || inst
->dst
.index
< this->next_temp
);
3164 /* First, do any copy propagation possible into the src regs. */
3165 for (int r
= 0; r
< 3; r
++) {
3166 glsl_to_tgsi_instruction
*first
= NULL
;
3168 int acp_base
= inst
->src
[r
].index
* 4;
3170 if (inst
->src
[r
].file
!= PROGRAM_TEMPORARY
||
3171 inst
->src
[r
].reladdr
)
3174 /* See if we can find entries in the ACP consisting of MOVs
3175 * from the same src register for all the swizzled channels
3176 * of this src register reference.
3178 for (int i
= 0; i
< 4; i
++) {
3179 int src_chan
= GET_SWZ(inst
->src
[r
].swizzle
, i
);
3180 glsl_to_tgsi_instruction
*copy_chan
= acp
[acp_base
+ src_chan
];
3187 assert(acp_level
[acp_base
+ src_chan
] <= level
);
3192 if (first
->src
[0].file
!= copy_chan
->src
[0].file
||
3193 first
->src
[0].index
!= copy_chan
->src
[0].index
) {
3201 /* We've now validated that we can copy-propagate to
3202 * replace this src register reference. Do it.
3204 inst
->src
[r
].file
= first
->src
[0].file
;
3205 inst
->src
[r
].index
= first
->src
[0].index
;
3208 for (int i
= 0; i
< 4; i
++) {
3209 int src_chan
= GET_SWZ(inst
->src
[r
].swizzle
, i
);
3210 glsl_to_tgsi_instruction
*copy_inst
= acp
[acp_base
+ src_chan
];
3211 swizzle
|= (GET_SWZ(copy_inst
->src
[0].swizzle
, src_chan
) <<
3214 inst
->src
[r
].swizzle
= swizzle
;
3219 case TGSI_OPCODE_BGNLOOP
:
3220 case TGSI_OPCODE_ENDLOOP
:
3221 /* End of a basic block, clear the ACP entirely. */
3222 memset(acp
, 0, sizeof(*acp
) * this->next_temp
* 4);
3225 case TGSI_OPCODE_IF
:
3229 case TGSI_OPCODE_ENDIF
:
3230 case TGSI_OPCODE_ELSE
:
3231 /* Clear all channels written inside the block from the ACP, but
3232 * leaving those that were not touched.
3234 for (int r
= 0; r
< this->next_temp
; r
++) {
3235 for (int c
= 0; c
< 4; c
++) {
3236 if (!acp
[4 * r
+ c
])
3239 if (acp_level
[4 * r
+ c
] >= level
)
3240 acp
[4 * r
+ c
] = NULL
;
3243 if (inst
->op
== TGSI_OPCODE_ENDIF
)
3248 /* Continuing the block, clear any written channels from
3251 if (inst
->dst
.file
== PROGRAM_TEMPORARY
&& inst
->dst
.reladdr
) {
3252 /* Any temporary might be written, so no copy propagation
3253 * across this instruction.
3255 memset(acp
, 0, sizeof(*acp
) * this->next_temp
* 4);
3256 } else if (inst
->dst
.file
== PROGRAM_OUTPUT
&&
3257 inst
->dst
.reladdr
) {
3258 /* Any output might be written, so no copy propagation
3259 * from outputs across this instruction.
3261 for (int r
= 0; r
< this->next_temp
; r
++) {
3262 for (int c
= 0; c
< 4; c
++) {
3263 if (!acp
[4 * r
+ c
])
3266 if (acp
[4 * r
+ c
]->src
[0].file
== PROGRAM_OUTPUT
)
3267 acp
[4 * r
+ c
] = NULL
;
3270 } else if (inst
->dst
.file
== PROGRAM_TEMPORARY
||
3271 inst
->dst
.file
== PROGRAM_OUTPUT
) {
3272 /* Clear where it's used as dst. */
3273 if (inst
->dst
.file
== PROGRAM_TEMPORARY
) {
3274 for (int c
= 0; c
< 4; c
++) {
3275 if (inst
->dst
.writemask
& (1 << c
)) {
3276 acp
[4 * inst
->dst
.index
+ c
] = NULL
;
3281 /* Clear where it's used as src. */
3282 for (int r
= 0; r
< this->next_temp
; r
++) {
3283 for (int c
= 0; c
< 4; c
++) {
3284 if (!acp
[4 * r
+ c
])
3287 int src_chan
= GET_SWZ(acp
[4 * r
+ c
]->src
[0].swizzle
, c
);
3289 if (acp
[4 * r
+ c
]->src
[0].file
== inst
->dst
.file
&&
3290 acp
[4 * r
+ c
]->src
[0].index
== inst
->dst
.index
&&
3291 inst
->dst
.writemask
& (1 << src_chan
))
3293 acp
[4 * r
+ c
] = NULL
;
3301 /* If this is a copy, add it to the ACP. */
3302 if (inst
->op
== TGSI_OPCODE_MOV
&&
3303 inst
->dst
.file
== PROGRAM_TEMPORARY
&&
3304 !inst
->dst
.reladdr
&&
3306 !inst
->src
[0].reladdr
&&
3307 !inst
->src
[0].negate
) {
3308 for (int i
= 0; i
< 4; i
++) {
3309 if (inst
->dst
.writemask
& (1 << i
)) {
3310 acp
[4 * inst
->dst
.index
+ i
] = inst
;
3311 acp_level
[4 * inst
->dst
.index
+ i
] = level
;
3317 ralloc_free(acp_level
);
3322 * Tracks available PROGRAM_TEMPORARY registers for dead code elimination.
3324 * The glsl_to_tgsi_visitor lazily produces code assuming that this pass
3325 * will occur. As an example, a TXP production after copy propagation but
3328 * 0: MOV TEMP[1], INPUT[4].xyyy;
3329 * 1: MOV TEMP[1].w, INPUT[4].wwww;
3330 * 2: TXP TEMP[2], INPUT[4].xyyw, texture[0], 2D;
3332 * and after this pass:
3334 * 0: TXP TEMP[2], INPUT[4].xyyw, texture[0], 2D;
3336 * FIXME: assumes that all functions are inlined (no support for BGNSUB/ENDSUB)
3337 * FIXME: doesn't eliminate all dead code inside of loops; it steps around them
3340 glsl_to_tgsi_visitor::eliminate_dead_code(void)
3344 for (i
=0; i
< this->next_temp
; i
++) {
3345 int last_read
= get_last_temp_read(i
);
3348 foreach_iter(exec_list_iterator
, iter
, this->instructions
) {
3349 glsl_to_tgsi_instruction
*inst
= (glsl_to_tgsi_instruction
*)iter
.get();
3351 if (inst
->dst
.file
== PROGRAM_TEMPORARY
&& inst
->dst
.index
== i
&&
3364 * On a basic block basis, tracks available PROGRAM_TEMPORARY registers for dead
3365 * code elimination. This is less primitive than eliminate_dead_code(), as it
3366 * is per-channel and can detect consecutive writes without a read between them
3367 * as dead code. However, there is some dead code that can be eliminated by
3368 * eliminate_dead_code() but not this function - for example, this function
3369 * cannot eliminate an instruction writing to a register that is never read and
3370 * is the only instruction writing to that register.
3372 * The glsl_to_tgsi_visitor lazily produces code assuming that this pass
3376 glsl_to_tgsi_visitor::eliminate_dead_code_advanced(void)
3378 glsl_to_tgsi_instruction
**writes
= rzalloc_array(mem_ctx
,
3379 glsl_to_tgsi_instruction
*,
3380 this->next_temp
* 4);
3381 int *write_level
= rzalloc_array(mem_ctx
, int, this->next_temp
* 4);
3385 foreach_iter(exec_list_iterator
, iter
, this->instructions
) {
3386 glsl_to_tgsi_instruction
*inst
= (glsl_to_tgsi_instruction
*)iter
.get();
3388 assert(inst
->dst
.file
!= PROGRAM_TEMPORARY
3389 || inst
->dst
.index
< this->next_temp
);
3392 case TGSI_OPCODE_BGNLOOP
:
3393 case TGSI_OPCODE_ENDLOOP
:
3394 /* End of a basic block, clear the write array entirely.
3395 * FIXME: This keeps us from killing dead code when the writes are
3396 * on either side of a loop, even when the register isn't touched
3399 memset(writes
, 0, sizeof(*writes
) * this->next_temp
* 4);
3402 case TGSI_OPCODE_ENDIF
:
3406 case TGSI_OPCODE_ELSE
:
3407 /* Clear all channels written inside the preceding if block from the
3408 * write array, but leave those that were not touched.
3410 * FIXME: This destroys opportunities to remove dead code inside of
3411 * IF blocks that are followed by an ELSE block.
3413 for (int r
= 0; r
< this->next_temp
; r
++) {
3414 for (int c
= 0; c
< 4; c
++) {
3415 if (!writes
[4 * r
+ c
])
3418 if (write_level
[4 * r
+ c
] >= level
)
3419 writes
[4 * r
+ c
] = NULL
;
3424 case TGSI_OPCODE_IF
:
3426 /* fallthrough to default case to mark the condition as read */
3429 /* Continuing the block, clear any channels from the write array that
3430 * are read by this instruction.
3432 for (int i
= 0; i
< 4; i
++) {
3433 if (inst
->src
[i
].file
== PROGRAM_TEMPORARY
&& inst
->src
[i
].reladdr
){
3434 /* Any temporary might be read, so no dead code elimination
3435 * across this instruction.
3437 memset(writes
, 0, sizeof(*writes
) * this->next_temp
* 4);
3438 } else if (inst
->src
[i
].file
== PROGRAM_TEMPORARY
) {
3439 /* Clear where it's used as src. */
3440 int src_chans
= 1 << GET_SWZ(inst
->src
[i
].swizzle
, 0);
3441 src_chans
|= 1 << GET_SWZ(inst
->src
[i
].swizzle
, 1);
3442 src_chans
|= 1 << GET_SWZ(inst
->src
[i
].swizzle
, 2);
3443 src_chans
|= 1 << GET_SWZ(inst
->src
[i
].swizzle
, 3);
3445 for (int c
= 0; c
< 4; c
++) {
3446 if (src_chans
& (1 << c
)) {
3447 writes
[4 * inst
->src
[i
].index
+ c
] = NULL
;
3455 /* If this instruction writes to a temporary, add it to the write array.
3456 * If there is already an instruction in the write array for one or more
3457 * of the channels, flag that channel write as dead.
3459 if (inst
->dst
.file
== PROGRAM_TEMPORARY
&&
3460 !inst
->dst
.reladdr
&&
3462 for (int c
= 0; c
< 4; c
++) {
3463 if (inst
->dst
.writemask
& (1 << c
)) {
3464 if (writes
[4 * inst
->dst
.index
+ c
]) {
3465 if (write_level
[4 * inst
->dst
.index
+ c
] < level
)
3468 writes
[4 * inst
->dst
.index
+ c
]->dead_mask
|= (1 << c
);
3470 writes
[4 * inst
->dst
.index
+ c
] = inst
;
3471 write_level
[4 * inst
->dst
.index
+ c
] = level
;
3477 /* Anything still in the write array at this point is dead code. */
3478 for (int r
= 0; r
< this->next_temp
; r
++) {
3479 for (int c
= 0; c
< 4; c
++) {
3480 glsl_to_tgsi_instruction
*inst
= writes
[4 * r
+ c
];
3482 inst
->dead_mask
|= (1 << c
);
3486 /* Now actually remove the instructions that are completely dead and update
3487 * the writemask of other instructions with dead channels.
3489 foreach_iter(exec_list_iterator
, iter
, this->instructions
) {
3490 glsl_to_tgsi_instruction
*inst
= (glsl_to_tgsi_instruction
*)iter
.get();
3492 if (!inst
->dead_mask
|| !inst
->dst
.writemask
)
3494 else if (inst
->dead_mask
== inst
->dst
.writemask
) {
3499 inst
->dst
.writemask
&= ~(inst
->dead_mask
);
3502 ralloc_free(write_level
);
3503 ralloc_free(writes
);
3508 /* Merges temporary registers together where possible to reduce the number of
3509 * registers needed to run a program.
3511 * Produces optimal code only after copy propagation and dead code elimination
3514 glsl_to_tgsi_visitor::merge_registers(void)
3516 int *last_reads
= rzalloc_array(mem_ctx
, int, this->next_temp
);
3517 int *first_writes
= rzalloc_array(mem_ctx
, int, this->next_temp
);
3520 /* Read the indices of the last read and first write to each temp register
3521 * into an array so that we don't have to traverse the instruction list as
3523 for (i
=0; i
< this->next_temp
; i
++) {
3524 last_reads
[i
] = get_last_temp_read(i
);
3525 first_writes
[i
] = get_first_temp_write(i
);
3528 /* Start looking for registers with non-overlapping usages that can be
3529 * merged together. */
3530 for (i
=0; i
< this->next_temp
; i
++) {
3531 /* Don't touch unused registers. */
3532 if (last_reads
[i
] < 0 || first_writes
[i
] < 0) continue;
3534 for (j
=0; j
< this->next_temp
; j
++) {
3535 /* Don't touch unused registers. */
3536 if (last_reads
[j
] < 0 || first_writes
[j
] < 0) continue;
3538 /* We can merge the two registers if the first write to j is after or
3539 * in the same instruction as the last read from i. Note that the
3540 * register at index i will always be used earlier or at the same time
3541 * as the register at index j. */
3542 if (first_writes
[i
] <= first_writes
[j
] &&
3543 last_reads
[i
] <= first_writes
[j
])
3545 rename_temp_register(j
, i
); /* Replace all references to j with i.*/
3547 /* Update the first_writes and last_reads arrays with the new
3548 * values for the merged register index, and mark the newly unused
3549 * register index as such. */
3550 last_reads
[i
] = last_reads
[j
];
3551 first_writes
[j
] = -1;
3557 ralloc_free(last_reads
);
3558 ralloc_free(first_writes
);
3561 /* Reassign indices to temporary registers by reusing unused indices created
3562 * by optimization passes. */
3564 glsl_to_tgsi_visitor::renumber_registers(void)
3569 for (i
=0; i
< this->next_temp
; i
++) {
3570 if (get_first_temp_read(i
) < 0) continue;
3572 rename_temp_register(i
, new_index
);
3576 this->next_temp
= new_index
;
3580 * Returns a fragment program which implements the current pixel transfer ops.
3581 * Based on get_pixel_transfer_program in st_atom_pixeltransfer.c.
3584 get_pixel_transfer_visitor(struct st_fragment_program
*fp
,
3585 glsl_to_tgsi_visitor
*original
,
3586 int scale_and_bias
, int pixel_maps
)
3588 glsl_to_tgsi_visitor
*v
= new glsl_to_tgsi_visitor();
3589 struct st_context
*st
= st_context(original
->ctx
);
3590 struct gl_program
*prog
= &fp
->Base
.Base
;
3591 struct gl_program_parameter_list
*params
= _mesa_new_parameter_list();
3592 st_src_reg coord
, src0
;
3594 glsl_to_tgsi_instruction
*inst
;
3596 /* Copy attributes of the glsl_to_tgsi_visitor in the original shader. */
3597 v
->ctx
= original
->ctx
;
3599 v
->glsl_version
= original
->glsl_version
;
3600 v
->options
= original
->options
;
3601 v
->next_temp
= original
->next_temp
;
3602 v
->num_address_regs
= original
->num_address_regs
;
3603 v
->samplers_used
= prog
->SamplersUsed
= original
->samplers_used
;
3604 v
->indirect_addr_temps
= original
->indirect_addr_temps
;
3605 v
->indirect_addr_consts
= original
->indirect_addr_consts
;
3606 memcpy(&v
->immediates
, &original
->immediates
, sizeof(v
->immediates
));
3609 * Get initial pixel color from the texture.
3610 * TEX colorTemp, fragment.texcoord[0], texture[0], 2D;
3612 coord
= st_src_reg(PROGRAM_INPUT
, FRAG_ATTRIB_TEX0
, glsl_type::vec2_type
);
3613 src0
= v
->get_temp(glsl_type::vec4_type
);
3614 dst0
= st_dst_reg(src0
);
3615 inst
= v
->emit(NULL
, TGSI_OPCODE_TEX
, dst0
, coord
);
3617 inst
->tex_target
= TEXTURE_2D_INDEX
;
3619 prog
->InputsRead
|= (1 << FRAG_ATTRIB_TEX0
);
3620 prog
->SamplersUsed
|= (1 << 0); /* mark sampler 0 as used */
3621 v
->samplers_used
|= (1 << 0);
3623 if (scale_and_bias
) {
3624 static const gl_state_index scale_state
[STATE_LENGTH
] =
3625 { STATE_INTERNAL
, STATE_PT_SCALE
,
3626 (gl_state_index
) 0, (gl_state_index
) 0, (gl_state_index
) 0 };
3627 static const gl_state_index bias_state
[STATE_LENGTH
] =
3628 { STATE_INTERNAL
, STATE_PT_BIAS
,
3629 (gl_state_index
) 0, (gl_state_index
) 0, (gl_state_index
) 0 };
3630 GLint scale_p
, bias_p
;
3631 st_src_reg scale
, bias
;
3633 scale_p
= _mesa_add_state_reference(params
, scale_state
);
3634 bias_p
= _mesa_add_state_reference(params
, bias_state
);
3636 /* MAD colorTemp, colorTemp, scale, bias; */
3637 scale
= st_src_reg(PROGRAM_STATE_VAR
, scale_p
, GLSL_TYPE_FLOAT
);
3638 bias
= st_src_reg(PROGRAM_STATE_VAR
, bias_p
, GLSL_TYPE_FLOAT
);
3639 inst
= v
->emit(NULL
, TGSI_OPCODE_MAD
, dst0
, src0
, scale
, bias
);
3643 st_src_reg temp
= v
->get_temp(glsl_type::vec4_type
);
3644 st_dst_reg temp_dst
= st_dst_reg(temp
);
3646 assert(st
->pixel_xfer
.pixelmap_texture
);
3648 /* With a little effort, we can do four pixel map look-ups with
3649 * two TEX instructions:
3652 /* TEX temp.rg, colorTemp.rgba, texture[1], 2D; */
3653 temp_dst
.writemask
= WRITEMASK_XY
; /* write R,G */
3654 inst
= v
->emit(NULL
, TGSI_OPCODE_TEX
, temp_dst
, src0
);
3656 inst
->tex_target
= TEXTURE_2D_INDEX
;
3658 /* TEX temp.ba, colorTemp.baba, texture[1], 2D; */
3659 src0
.swizzle
= MAKE_SWIZZLE4(SWIZZLE_Z
, SWIZZLE_W
, SWIZZLE_Z
, SWIZZLE_W
);
3660 temp_dst
.writemask
= WRITEMASK_ZW
; /* write B,A */
3661 inst
= v
->emit(NULL
, TGSI_OPCODE_TEX
, temp_dst
, src0
);
3663 inst
->tex_target
= TEXTURE_2D_INDEX
;
3665 prog
->SamplersUsed
|= (1 << 1); /* mark sampler 1 as used */
3666 v
->samplers_used
|= (1 << 1);
3668 /* MOV colorTemp, temp; */
3669 inst
= v
->emit(NULL
, TGSI_OPCODE_MOV
, dst0
, temp
);
3672 /* Now copy the instructions from the original glsl_to_tgsi_visitor into the
3674 foreach_iter(exec_list_iterator
, iter
, original
->instructions
) {
3675 glsl_to_tgsi_instruction
*inst
= (glsl_to_tgsi_instruction
*)iter
.get();
3676 st_src_reg src_regs
[3];
3678 if (inst
->dst
.file
== PROGRAM_OUTPUT
)
3679 prog
->OutputsWritten
|= BITFIELD64_BIT(inst
->dst
.index
);
3681 for (int i
=0; i
<3; i
++) {
3682 src_regs
[i
] = inst
->src
[i
];
3683 if (src_regs
[i
].file
== PROGRAM_INPUT
&&
3684 src_regs
[i
].index
== FRAG_ATTRIB_COL0
)
3686 src_regs
[i
].file
= PROGRAM_TEMPORARY
;
3687 src_regs
[i
].index
= src0
.index
;
3689 else if (src_regs
[i
].file
== PROGRAM_INPUT
)
3690 prog
->InputsRead
|= (1 << src_regs
[i
].index
);
3693 v
->emit(NULL
, inst
->op
, inst
->dst
, src_regs
[0], src_regs
[1], src_regs
[2]);
3696 /* Make modifications to fragment program info. */
3697 prog
->Parameters
= _mesa_combine_parameter_lists(params
,
3698 original
->prog
->Parameters
);
3699 prog
->Attributes
= _mesa_clone_parameter_list(original
->prog
->Attributes
);
3700 prog
->Varying
= _mesa_clone_parameter_list(original
->prog
->Varying
);
3701 _mesa_free_parameter_list(params
);
3702 count_resources(v
, prog
);
3703 fp
->glsl_to_tgsi
= v
;
3707 * Make fragment program for glBitmap:
3708 * Sample the texture and kill the fragment if the bit is 0.
3709 * This program will be combined with the user's fragment program.
3711 * Based on make_bitmap_fragment_program in st_cb_bitmap.c.
3714 get_bitmap_visitor(struct st_fragment_program
*fp
,
3715 glsl_to_tgsi_visitor
*original
, int samplerIndex
)
3717 glsl_to_tgsi_visitor
*v
= new glsl_to_tgsi_visitor();
3718 struct st_context
*st
= st_context(original
->ctx
);
3719 struct gl_program
*prog
= &fp
->Base
.Base
;
3720 st_src_reg coord
, src0
;
3722 glsl_to_tgsi_instruction
*inst
;
3724 /* Copy attributes of the glsl_to_tgsi_visitor in the original shader. */
3725 v
->ctx
= original
->ctx
;
3727 v
->glsl_version
= original
->glsl_version
;
3728 v
->options
= original
->options
;
3729 v
->next_temp
= original
->next_temp
;
3730 v
->num_address_regs
= original
->num_address_regs
;
3731 v
->samplers_used
= prog
->SamplersUsed
= original
->samplers_used
;
3732 v
->indirect_addr_temps
= original
->indirect_addr_temps
;
3733 v
->indirect_addr_consts
= original
->indirect_addr_consts
;
3734 memcpy(&v
->immediates
, &original
->immediates
, sizeof(v
->immediates
));
3736 /* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */
3737 coord
= st_src_reg(PROGRAM_INPUT
, FRAG_ATTRIB_TEX0
, glsl_type::vec2_type
);
3738 src0
= v
->get_temp(glsl_type::vec4_type
);
3739 dst0
= st_dst_reg(src0
);
3740 inst
= v
->emit(NULL
, TGSI_OPCODE_TEX
, dst0
, coord
);
3741 inst
->sampler
= samplerIndex
;
3742 inst
->tex_target
= TEXTURE_2D_INDEX
;
3744 prog
->InputsRead
|= (1 << FRAG_ATTRIB_TEX0
);
3745 prog
->SamplersUsed
|= (1 << samplerIndex
); /* mark sampler as used */
3746 v
->samplers_used
|= (1 << samplerIndex
);
3748 /* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */
3749 src0
.negate
= NEGATE_XYZW
;
3750 if (st
->bitmap
.tex_format
== PIPE_FORMAT_L8_UNORM
)
3751 src0
.swizzle
= SWIZZLE_XXXX
;
3752 inst
= v
->emit(NULL
, TGSI_OPCODE_KIL
, undef_dst
, src0
);
3754 /* Now copy the instructions from the original glsl_to_tgsi_visitor into the
3756 foreach_iter(exec_list_iterator
, iter
, original
->instructions
) {
3757 glsl_to_tgsi_instruction
*inst
= (glsl_to_tgsi_instruction
*)iter
.get();
3758 st_src_reg src_regs
[3];
3760 if (inst
->dst
.file
== PROGRAM_OUTPUT
)
3761 prog
->OutputsWritten
|= BITFIELD64_BIT(inst
->dst
.index
);
3763 for (int i
=0; i
<3; i
++) {
3764 src_regs
[i
] = inst
->src
[i
];
3765 if (src_regs
[i
].file
== PROGRAM_INPUT
)
3766 prog
->InputsRead
|= (1 << src_regs
[i
].index
);
3769 v
->emit(NULL
, inst
->op
, inst
->dst
, src_regs
[0], src_regs
[1], src_regs
[2]);
3772 /* Make modifications to fragment program info. */
3773 prog
->Parameters
= _mesa_clone_parameter_list(original
->prog
->Parameters
);
3774 prog
->Attributes
= _mesa_clone_parameter_list(original
->prog
->Attributes
);
3775 prog
->Varying
= _mesa_clone_parameter_list(original
->prog
->Varying
);
3776 count_resources(v
, prog
);
3777 fp
->glsl_to_tgsi
= v
;
3780 /* ------------------------- TGSI conversion stuff -------------------------- */
3782 unsigned branch_target
;
3787 * Intermediate state used during shader translation.
3789 struct st_translate
{
3790 struct ureg_program
*ureg
;
3792 struct ureg_dst temps
[MAX_TEMPS
];
3793 struct ureg_src
*constants
;
3794 struct ureg_src
*immediates
;
3795 struct ureg_dst outputs
[PIPE_MAX_SHADER_OUTPUTS
];
3796 struct ureg_src inputs
[PIPE_MAX_SHADER_INPUTS
];
3797 struct ureg_dst address
[1];
3798 struct ureg_src samplers
[PIPE_MAX_SAMPLERS
];
3799 struct ureg_src systemValues
[SYSTEM_VALUE_MAX
];
3801 /* Extra info for handling point size clamping in vertex shader */
3802 struct ureg_dst pointSizeResult
; /**< Actual point size output register */
3803 struct ureg_src pointSizeConst
; /**< Point size range constant register */
3804 GLint pointSizeOutIndex
; /**< Temp point size output register */
3805 GLboolean prevInstWrotePointSize
;
3807 const GLuint
*inputMapping
;
3808 const GLuint
*outputMapping
;
3810 /* For every instruction that contains a label (eg CALL), keep
3811 * details so that we can go back afterwards and emit the correct
3812 * tgsi instruction number for each label.
3814 struct label
*labels
;
3815 unsigned labels_size
;
3816 unsigned labels_count
;
3818 /* Keep a record of the tgsi instruction number that each mesa
3819 * instruction starts at, will be used to fix up labels after
3824 unsigned insn_count
;
3826 unsigned procType
; /**< TGSI_PROCESSOR_VERTEX/FRAGMENT */
3831 /** Map Mesa's SYSTEM_VALUE_x to TGSI_SEMANTIC_x */
3832 static unsigned mesa_sysval_to_semantic
[SYSTEM_VALUE_MAX
] = {
3834 TGSI_SEMANTIC_INSTANCEID
3838 * Make note of a branch to a label in the TGSI code.
3839 * After we've emitted all instructions, we'll go over the list
3840 * of labels built here and patch the TGSI code with the actual
3841 * location of each label.
3843 static unsigned *get_label(struct st_translate
*t
, unsigned branch_target
)
3847 if (t
->labels_count
+ 1 >= t
->labels_size
) {
3848 t
->labels_size
= 1 << (util_logbase2(t
->labels_size
) + 1);
3849 t
->labels
= (struct label
*)realloc(t
->labels
,
3850 t
->labels_size
* sizeof(struct label
));
3851 if (t
->labels
== NULL
) {
3852 static unsigned dummy
;
3858 i
= t
->labels_count
++;
3859 t
->labels
[i
].branch_target
= branch_target
;
3860 return &t
->labels
[i
].token
;
3864 * Called prior to emitting the TGSI code for each instruction.
3865 * Allocate additional space for instructions if needed.
3866 * Update the insn[] array so the next glsl_to_tgsi_instruction points to
3867 * the next TGSI instruction.
3869 static void set_insn_start(struct st_translate
*t
, unsigned start
)
3871 if (t
->insn_count
+ 1 >= t
->insn_size
) {
3872 t
->insn_size
= 1 << (util_logbase2(t
->insn_size
) + 1);
3873 t
->insn
= (unsigned *)realloc(t
->insn
, t
->insn_size
* sizeof(t
->insn
[0]));
3874 if (t
->insn
== NULL
) {
3880 t
->insn
[t
->insn_count
++] = start
;
3884 * Map a glsl_to_tgsi constant/immediate to a TGSI immediate.
3886 static struct ureg_src
3887 emit_immediate(struct st_translate
*t
,
3888 gl_constant_value values
[4],
3891 struct ureg_program
*ureg
= t
->ureg
;
3896 return ureg_DECL_immediate(ureg
, &values
[0].f
, size
);
3898 return ureg_DECL_immediate_int(ureg
, &values
[0].i
, size
);
3899 case GL_UNSIGNED_INT
:
3901 return ureg_DECL_immediate_uint(ureg
, &values
[0].u
, size
);
3903 assert(!"should not get here - type must be float, int, uint, or bool");
3904 return ureg_src_undef();
3909 * Map a glsl_to_tgsi dst register to a TGSI ureg_dst register.
3911 static struct ureg_dst
3912 dst_register(struct st_translate
*t
,
3913 gl_register_file file
,
3917 case PROGRAM_UNDEFINED
:
3918 return ureg_dst_undef();
3920 case PROGRAM_TEMPORARY
:
3921 if (ureg_dst_is_undef(t
->temps
[index
]))
3922 t
->temps
[index
] = ureg_DECL_temporary(t
->ureg
);
3924 return t
->temps
[index
];
3926 case PROGRAM_OUTPUT
:
3927 if (t
->procType
== TGSI_PROCESSOR_VERTEX
&& index
== VERT_RESULT_PSIZ
)
3928 t
->prevInstWrotePointSize
= GL_TRUE
;
3930 if (t
->procType
== TGSI_PROCESSOR_VERTEX
)
3931 assert(index
< VERT_RESULT_MAX
);
3932 else if (t
->procType
== TGSI_PROCESSOR_FRAGMENT
)
3933 assert(index
< FRAG_RESULT_MAX
);
3935 assert(index
< GEOM_RESULT_MAX
);
3937 assert(t
->outputMapping
[index
] < Elements(t
->outputs
));
3939 return t
->outputs
[t
->outputMapping
[index
]];
3941 case PROGRAM_ADDRESS
:
3942 return t
->address
[index
];
3945 assert(!"unknown dst register file");
3946 return ureg_dst_undef();
3951 * Map a glsl_to_tgsi src register to a TGSI ureg_src register.
3953 static struct ureg_src
3954 src_register(struct st_translate
*t
,
3955 gl_register_file file
,
3959 case PROGRAM_UNDEFINED
:
3960 return ureg_src_undef();
3962 case PROGRAM_TEMPORARY
:
3964 assert(index
< Elements(t
->temps
));
3965 if (ureg_dst_is_undef(t
->temps
[index
]))
3966 t
->temps
[index
] = ureg_DECL_temporary(t
->ureg
);
3967 return ureg_src(t
->temps
[index
]);
3969 case PROGRAM_NAMED_PARAM
:
3970 case PROGRAM_ENV_PARAM
:
3971 case PROGRAM_LOCAL_PARAM
:
3972 case PROGRAM_UNIFORM
:
3974 return t
->constants
[index
];
3975 case PROGRAM_STATE_VAR
:
3976 case PROGRAM_CONSTANT
: /* ie, immediate */
3978 return ureg_DECL_constant(t
->ureg
, 0);
3980 return t
->constants
[index
];
3982 case PROGRAM_IMMEDIATE
:
3983 return t
->immediates
[index
];
3986 assert(t
->inputMapping
[index
] < Elements(t
->inputs
));
3987 return t
->inputs
[t
->inputMapping
[index
]];
3989 case PROGRAM_OUTPUT
:
3990 assert(t
->outputMapping
[index
] < Elements(t
->outputs
));
3991 return ureg_src(t
->outputs
[t
->outputMapping
[index
]]); /* not needed? */
3993 case PROGRAM_ADDRESS
:
3994 return ureg_src(t
->address
[index
]);
3996 case PROGRAM_SYSTEM_VALUE
:
3997 assert(index
< Elements(t
->systemValues
));
3998 return t
->systemValues
[index
];
4001 assert(!"unknown src register file");
4002 return ureg_src_undef();
4007 * Create a TGSI ureg_dst register from an st_dst_reg.
4009 static struct ureg_dst
4010 translate_dst(struct st_translate
*t
,
4011 const st_dst_reg
*dst_reg
,
4014 struct ureg_dst dst
= dst_register(t
,
4018 dst
= ureg_writemask(dst
, dst_reg
->writemask
);
4021 dst
= ureg_saturate(dst
);
4023 if (dst_reg
->reladdr
!= NULL
)
4024 dst
= ureg_dst_indirect(dst
, ureg_src(t
->address
[0]));
4030 * Create a TGSI ureg_src register from an st_src_reg.
4032 static struct ureg_src
4033 translate_src(struct st_translate
*t
, const st_src_reg
*src_reg
)
4035 struct ureg_src src
= src_register(t
, src_reg
->file
, src_reg
->index
);
4037 src
= ureg_swizzle(src
,
4038 GET_SWZ(src_reg
->swizzle
, 0) & 0x3,
4039 GET_SWZ(src_reg
->swizzle
, 1) & 0x3,
4040 GET_SWZ(src_reg
->swizzle
, 2) & 0x3,
4041 GET_SWZ(src_reg
->swizzle
, 3) & 0x3);
4043 if ((src_reg
->negate
& 0xf) == NEGATE_XYZW
)
4044 src
= ureg_negate(src
);
4046 if (src_reg
->reladdr
!= NULL
) {
4047 /* Normally ureg_src_indirect() would be used here, but a stupid compiler
4048 * bug in g++ makes ureg_src_indirect (an inline C function) erroneously
4049 * set the bit for src.Negate. So we have to do the operation manually
4050 * here to work around the compiler's problems. */
4051 /*src = ureg_src_indirect(src, ureg_src(t->address[0]));*/
4052 struct ureg_src addr
= ureg_src(t
->address
[0]);
4054 src
.IndirectFile
= addr
.File
;
4055 src
.IndirectIndex
= addr
.Index
;
4056 src
.IndirectSwizzle
= addr
.SwizzleX
;
4058 if (src_reg
->file
!= PROGRAM_INPUT
&&
4059 src_reg
->file
!= PROGRAM_OUTPUT
) {
4060 /* If src_reg->index was negative, it was set to zero in
4061 * src_register(). Reassign it now. But don't do this
4062 * for input/output regs since they get remapped while
4063 * const buffers don't.
4065 src
.Index
= src_reg
->index
;
4073 compile_tgsi_instruction(struct st_translate
*t
,
4074 const struct glsl_to_tgsi_instruction
*inst
)
4076 struct ureg_program
*ureg
= t
->ureg
;
4078 struct ureg_dst dst
[1];
4079 struct ureg_src src
[4];
4083 num_dst
= num_inst_dst_regs(inst
->op
);
4084 num_src
= num_inst_src_regs(inst
->op
);
4087 dst
[0] = translate_dst(t
,
4091 for (i
= 0; i
< num_src
; i
++)
4092 src
[i
] = translate_src(t
, &inst
->src
[i
]);
4095 case TGSI_OPCODE_BGNLOOP
:
4096 case TGSI_OPCODE_CAL
:
4097 case TGSI_OPCODE_ELSE
:
4098 case TGSI_OPCODE_ENDLOOP
:
4099 case TGSI_OPCODE_IF
:
4100 assert(num_dst
== 0);
4101 ureg_label_insn(ureg
,
4105 inst
->op
== TGSI_OPCODE_CAL
? inst
->function
->sig_id
: 0));
4108 case TGSI_OPCODE_TEX
:
4109 case TGSI_OPCODE_TXB
:
4110 case TGSI_OPCODE_TXD
:
4111 case TGSI_OPCODE_TXL
:
4112 case TGSI_OPCODE_TXP
:
4113 src
[num_src
++] = t
->samplers
[inst
->sampler
];
4117 translate_texture_target(inst
->tex_target
, inst
->tex_shadow
),
4121 case TGSI_OPCODE_SCS
:
4122 dst
[0] = ureg_writemask(dst
[0], TGSI_WRITEMASK_XY
);
4123 ureg_insn(ureg
, inst
->op
, dst
, num_dst
, src
, num_src
);
4136 * Emit the TGSI instructions to adjust the WPOS pixel center convention
4137 * Basically, add (adjX, adjY) to the fragment position.
4140 emit_adjusted_wpos(struct st_translate
*t
,
4141 const struct gl_program
*program
,
4142 float adjX
, float adjY
)
4144 struct ureg_program
*ureg
= t
->ureg
;
4145 struct ureg_dst wpos_temp
= ureg_DECL_temporary(ureg
);
4146 struct ureg_src wpos_input
= t
->inputs
[t
->inputMapping
[FRAG_ATTRIB_WPOS
]];
4148 /* Note that we bias X and Y and pass Z and W through unchanged.
4149 * The shader might also use gl_FragCoord.w and .z.
4151 ureg_ADD(ureg
, wpos_temp
, wpos_input
,
4152 ureg_imm4f(ureg
, adjX
, adjY
, 0.0f
, 0.0f
));
4154 t
->inputs
[t
->inputMapping
[FRAG_ATTRIB_WPOS
]] = ureg_src(wpos_temp
);
4159 * Emit the TGSI instructions for inverting the WPOS y coordinate.
4160 * This code is unavoidable because it also depends on whether
4161 * a FBO is bound (STATE_FB_WPOS_Y_TRANSFORM).
4164 emit_wpos_inversion(struct st_translate
*t
,
4165 const struct gl_program
*program
,
4168 struct ureg_program
*ureg
= t
->ureg
;
4170 /* Fragment program uses fragment position input.
4171 * Need to replace instances of INPUT[WPOS] with temp T
4172 * where T = INPUT[WPOS] by y is inverted.
4174 static const gl_state_index wposTransformState
[STATE_LENGTH
]
4175 = { STATE_INTERNAL
, STATE_FB_WPOS_Y_TRANSFORM
,
4176 (gl_state_index
)0, (gl_state_index
)0, (gl_state_index
)0 };
4178 /* XXX: note we are modifying the incoming shader here! Need to
4179 * do this before emitting the constant decls below, or this
4182 unsigned wposTransConst
= _mesa_add_state_reference(program
->Parameters
,
4183 wposTransformState
);
4185 struct ureg_src wpostrans
= ureg_DECL_constant(ureg
, wposTransConst
);
4186 struct ureg_dst wpos_temp
;
4187 struct ureg_src wpos_input
= t
->inputs
[t
->inputMapping
[FRAG_ATTRIB_WPOS
]];
4189 /* MOV wpos_temp, input[wpos]
4191 if (wpos_input
.File
== TGSI_FILE_TEMPORARY
)
4192 wpos_temp
= ureg_dst(wpos_input
);
4194 wpos_temp
= ureg_DECL_temporary(ureg
);
4195 ureg_MOV(ureg
, wpos_temp
, wpos_input
);
4199 /* MAD wpos_temp.y, wpos_input, wpostrans.xxxx, wpostrans.yyyy
4202 ureg_writemask(wpos_temp
, TGSI_WRITEMASK_Y
),
4204 ureg_scalar(wpostrans
, 0),
4205 ureg_scalar(wpostrans
, 1));
4207 /* MAD wpos_temp.y, wpos_input, wpostrans.zzzz, wpostrans.wwww
4210 ureg_writemask(wpos_temp
, TGSI_WRITEMASK_Y
),
4212 ureg_scalar(wpostrans
, 2),
4213 ureg_scalar(wpostrans
, 3));
4216 /* Use wpos_temp as position input from here on:
4218 t
->inputs
[t
->inputMapping
[FRAG_ATTRIB_WPOS
]] = ureg_src(wpos_temp
);
4223 * Emit fragment position/ooordinate code.
4226 emit_wpos(struct st_context
*st
,
4227 struct st_translate
*t
,
4228 const struct gl_program
*program
,
4229 struct ureg_program
*ureg
)
4231 const struct gl_fragment_program
*fp
=
4232 (const struct gl_fragment_program
*) program
;
4233 struct pipe_screen
*pscreen
= st
->pipe
->screen
;
4234 boolean invert
= FALSE
;
4236 if (fp
->OriginUpperLeft
) {
4237 /* Fragment shader wants origin in upper-left */
4238 if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT
)) {
4239 /* the driver supports upper-left origin */
4241 else if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT
)) {
4242 /* the driver supports lower-left origin, need to invert Y */
4243 ureg_property_fs_coord_origin(ureg
, TGSI_FS_COORD_ORIGIN_LOWER_LEFT
);
4250 /* Fragment shader wants origin in lower-left */
4251 if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT
))
4252 /* the driver supports lower-left origin */
4253 ureg_property_fs_coord_origin(ureg
, TGSI_FS_COORD_ORIGIN_LOWER_LEFT
);
4254 else if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT
))
4255 /* the driver supports upper-left origin, need to invert Y */
4261 if (fp
->PixelCenterInteger
) {
4262 /* Fragment shader wants pixel center integer */
4263 if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER
))
4264 /* the driver supports pixel center integer */
4265 ureg_property_fs_coord_pixel_center(ureg
, TGSI_FS_COORD_PIXEL_CENTER_INTEGER
);
4266 else if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER
))
4267 /* the driver supports pixel center half integer, need to bias X,Y */
4268 emit_adjusted_wpos(t
, program
, 0.5f
, invert
? 0.5f
: -0.5f
);
4273 /* Fragment shader wants pixel center half integer */
4274 if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER
)) {
4275 /* the driver supports pixel center half integer */
4277 else if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER
)) {
4278 /* the driver supports pixel center integer, need to bias X,Y */
4279 ureg_property_fs_coord_pixel_center(ureg
, TGSI_FS_COORD_PIXEL_CENTER_INTEGER
);
4280 emit_adjusted_wpos(t
, program
, 0.5f
, invert
? -0.5f
: 0.5f
);
4286 /* we invert after adjustment so that we avoid the MOV to temporary,
4287 * and reuse the adjustment ADD instead */
4288 emit_wpos_inversion(t
, program
, invert
);
4292 * OpenGL's fragment gl_FrontFace input is 1 for front-facing, 0 for back.
4293 * TGSI uses +1 for front, -1 for back.
4294 * This function converts the TGSI value to the GL value. Simply clamping/
4295 * saturating the value to [0,1] does the job.
4298 emit_face_var(struct st_translate
*t
)
4300 struct ureg_program
*ureg
= t
->ureg
;
4301 struct ureg_dst face_temp
= ureg_DECL_temporary(ureg
);
4302 struct ureg_src face_input
= t
->inputs
[t
->inputMapping
[FRAG_ATTRIB_FACE
]];
4304 /* MOV_SAT face_temp, input[face] */
4305 face_temp
= ureg_saturate(face_temp
);
4306 ureg_MOV(ureg
, face_temp
, face_input
);
4308 /* Use face_temp as face input from here on: */
4309 t
->inputs
[t
->inputMapping
[FRAG_ATTRIB_FACE
]] = ureg_src(face_temp
);
4313 emit_edgeflags(struct st_translate
*t
)
4315 struct ureg_program
*ureg
= t
->ureg
;
4316 struct ureg_dst edge_dst
= t
->outputs
[t
->outputMapping
[VERT_RESULT_EDGE
]];
4317 struct ureg_src edge_src
= t
->inputs
[t
->inputMapping
[VERT_ATTRIB_EDGEFLAG
]];
4319 ureg_MOV(ureg
, edge_dst
, edge_src
);
4323 * Translate intermediate IR (glsl_to_tgsi_instruction) to TGSI format.
4324 * \param program the program to translate
4325 * \param numInputs number of input registers used
4326 * \param inputMapping maps Mesa fragment program inputs to TGSI generic
4328 * \param inputSemanticName the TGSI_SEMANTIC flag for each input
4329 * \param inputSemanticIndex the semantic index (ex: which texcoord) for
4331 * \param interpMode the TGSI_INTERPOLATE_LINEAR/PERSP mode for each input
4332 * \param numOutputs number of output registers used
4333 * \param outputMapping maps Mesa fragment program outputs to TGSI
4335 * \param outputSemanticName the TGSI_SEMANTIC flag for each output
4336 * \param outputSemanticIndex the semantic index (ex: which texcoord) for
4339 * \return PIPE_OK or PIPE_ERROR_OUT_OF_MEMORY
4341 extern "C" enum pipe_error
4342 st_translate_program(
4343 struct gl_context
*ctx
,
4345 struct ureg_program
*ureg
,
4346 glsl_to_tgsi_visitor
*program
,
4347 const struct gl_program
*proginfo
,
4349 const GLuint inputMapping
[],
4350 const ubyte inputSemanticName
[],
4351 const ubyte inputSemanticIndex
[],
4352 const GLuint interpMode
[],
4354 const GLuint outputMapping
[],
4355 const ubyte outputSemanticName
[],
4356 const ubyte outputSemanticIndex
[],
4357 boolean passthrough_edgeflags
)
4359 struct st_translate translate
, *t
;
4361 enum pipe_error ret
= PIPE_OK
;
4363 assert(numInputs
<= Elements(t
->inputs
));
4364 assert(numOutputs
<= Elements(t
->outputs
));
4367 memset(t
, 0, sizeof *t
);
4369 t
->procType
= procType
;
4370 t
->inputMapping
= inputMapping
;
4371 t
->outputMapping
= outputMapping
;
4373 t
->pointSizeOutIndex
= -1;
4374 t
->prevInstWrotePointSize
= GL_FALSE
;
4377 * Declare input attributes.
4379 if (procType
== TGSI_PROCESSOR_FRAGMENT
) {
4380 for (i
= 0; i
< numInputs
; i
++) {
4381 t
->inputs
[i
] = ureg_DECL_fs_input(ureg
,
4382 inputSemanticName
[i
],
4383 inputSemanticIndex
[i
],
4387 if (proginfo
->InputsRead
& FRAG_BIT_WPOS
) {
4388 /* Must do this after setting up t->inputs, and before
4389 * emitting constant references, below:
4391 emit_wpos(st_context(ctx
), t
, proginfo
, ureg
);
4394 if (proginfo
->InputsRead
& FRAG_BIT_FACE
)
4398 * Declare output attributes.
4400 for (i
= 0; i
< numOutputs
; i
++) {
4401 switch (outputSemanticName
[i
]) {
4402 case TGSI_SEMANTIC_POSITION
:
4403 t
->outputs
[i
] = ureg_DECL_output(ureg
,
4404 TGSI_SEMANTIC_POSITION
, /* Z/Depth */
4405 outputSemanticIndex
[i
]);
4406 t
->outputs
[i
] = ureg_writemask(t
->outputs
[i
], TGSI_WRITEMASK_Z
);
4408 case TGSI_SEMANTIC_STENCIL
:
4409 t
->outputs
[i
] = ureg_DECL_output(ureg
,
4410 TGSI_SEMANTIC_STENCIL
, /* Stencil */
4411 outputSemanticIndex
[i
]);
4412 t
->outputs
[i
] = ureg_writemask(t
->outputs
[i
], TGSI_WRITEMASK_Y
);
4414 case TGSI_SEMANTIC_COLOR
:
4415 t
->outputs
[i
] = ureg_DECL_output(ureg
,
4416 TGSI_SEMANTIC_COLOR
,
4417 outputSemanticIndex
[i
]);
4420 assert(!"fragment shader outputs must be POSITION/STENCIL/COLOR");
4421 return PIPE_ERROR_BAD_INPUT
;
4425 else if (procType
== TGSI_PROCESSOR_GEOMETRY
) {
4426 for (i
= 0; i
< numInputs
; i
++) {
4427 t
->inputs
[i
] = ureg_DECL_gs_input(ureg
,
4429 inputSemanticName
[i
],
4430 inputSemanticIndex
[i
]);
4433 for (i
= 0; i
< numOutputs
; i
++) {
4434 t
->outputs
[i
] = ureg_DECL_output(ureg
,
4435 outputSemanticName
[i
],
4436 outputSemanticIndex
[i
]);
4440 assert(procType
== TGSI_PROCESSOR_VERTEX
);
4442 for (i
= 0; i
< numInputs
; i
++) {
4443 t
->inputs
[i
] = ureg_DECL_vs_input(ureg
, i
);
4446 for (i
= 0; i
< numOutputs
; i
++) {
4447 t
->outputs
[i
] = ureg_DECL_output(ureg
,
4448 outputSemanticName
[i
],
4449 outputSemanticIndex
[i
]);
4450 if ((outputSemanticName
[i
] == TGSI_SEMANTIC_PSIZE
) && proginfo
->Id
) {
4451 /* Writing to the point size result register requires special
4452 * handling to implement clamping.
4454 static const gl_state_index pointSizeClampState
[STATE_LENGTH
]
4455 = { STATE_INTERNAL
, STATE_POINT_SIZE_IMPL_CLAMP
, (gl_state_index
)0, (gl_state_index
)0, (gl_state_index
)0 };
4456 /* XXX: note we are modifying the incoming shader here! Need to
4457 * do this before emitting the constant decls below, or this
4460 unsigned pointSizeClampConst
=
4461 _mesa_add_state_reference(proginfo
->Parameters
,
4462 pointSizeClampState
);
4463 struct ureg_dst psizregtemp
= ureg_DECL_temporary(ureg
);
4464 t
->pointSizeConst
= ureg_DECL_constant(ureg
, pointSizeClampConst
);
4465 t
->pointSizeResult
= t
->outputs
[i
];
4466 t
->pointSizeOutIndex
= i
;
4467 t
->outputs
[i
] = psizregtemp
;
4470 if (passthrough_edgeflags
)
4474 /* Declare address register.
4476 if (program
->num_address_regs
> 0) {
4477 assert(program
->num_address_regs
== 1);
4478 t
->address
[0] = ureg_DECL_address(ureg
);
4481 /* Declare misc input registers
4484 GLbitfield sysInputs
= proginfo
->SystemValuesRead
;
4485 unsigned numSys
= 0;
4486 for (i
= 0; sysInputs
; i
++) {
4487 if (sysInputs
& (1 << i
)) {
4488 unsigned semName
= mesa_sysval_to_semantic
[i
];
4489 t
->systemValues
[i
] = ureg_DECL_system_value(ureg
, numSys
, semName
, 0);
4491 sysInputs
&= ~(1 << i
);
4496 if (program
->indirect_addr_temps
) {
4497 /* If temps are accessed with indirect addressing, declare temporaries
4498 * in sequential order. Else, we declare them on demand elsewhere.
4499 * (Note: the number of temporaries is equal to program->next_temp)
4501 for (i
= 0; i
< (unsigned)program
->next_temp
; i
++) {
4502 /* XXX use TGSI_FILE_TEMPORARY_ARRAY when it's supported by ureg */
4503 t
->temps
[i
] = ureg_DECL_temporary(t
->ureg
);
4507 /* Emit constants and uniforms. TGSI uses a single index space for these,
4508 * so we put all the translated regs in t->constants.
4510 if (proginfo
->Parameters
) {
4511 t
->constants
= (struct ureg_src
*)CALLOC(proginfo
->Parameters
->NumParameters
* sizeof(t
->constants
[0]));
4512 if (t
->constants
== NULL
) {
4513 ret
= PIPE_ERROR_OUT_OF_MEMORY
;
4517 for (i
= 0; i
< proginfo
->Parameters
->NumParameters
; i
++) {
4518 switch (proginfo
->Parameters
->Parameters
[i
].Type
) {
4519 case PROGRAM_ENV_PARAM
:
4520 case PROGRAM_LOCAL_PARAM
:
4521 case PROGRAM_STATE_VAR
:
4522 case PROGRAM_NAMED_PARAM
:
4523 case PROGRAM_UNIFORM
:
4524 t
->constants
[i
] = ureg_DECL_constant(ureg
, i
);
4527 /* Emit immediates for PROGRAM_CONSTANT only when there's no indirect
4528 * addressing of the const buffer.
4529 * FIXME: Be smarter and recognize param arrays:
4530 * indirect addressing is only valid within the referenced
4533 case PROGRAM_CONSTANT
:
4534 if (program
->indirect_addr_consts
)
4535 t
->constants
[i
] = ureg_DECL_constant(ureg
, i
);
4537 t
->constants
[i
] = emit_immediate(t
,
4538 proginfo
->Parameters
->ParameterValues
[i
],
4539 proginfo
->Parameters
->Parameters
[i
].DataType
,
4548 /* Emit immediate values.
4550 t
->immediates
= (struct ureg_src
*)CALLOC(program
->num_immediates
* sizeof(struct ureg_src
));
4551 if (t
->immediates
== NULL
) {
4552 ret
= PIPE_ERROR_OUT_OF_MEMORY
;
4556 foreach_iter(exec_list_iterator
, iter
, program
->immediates
) {
4557 immediate_storage
*imm
= (immediate_storage
*)iter
.get();
4558 t
->immediates
[i
++] = emit_immediate(t
, imm
->values
, imm
->type
, imm
->size
);
4561 /* texture samplers */
4562 for (i
= 0; i
< ctx
->Const
.MaxTextureImageUnits
; i
++) {
4563 if (program
->samplers_used
& (1 << i
)) {
4564 t
->samplers
[i
] = ureg_DECL_sampler(ureg
, i
);
4568 /* Emit each instruction in turn:
4570 foreach_iter(exec_list_iterator
, iter
, program
->instructions
) {
4571 set_insn_start(t
, ureg_get_instruction_number(ureg
));
4572 compile_tgsi_instruction(t
, (glsl_to_tgsi_instruction
*)iter
.get());
4574 if (t
->prevInstWrotePointSize
&& proginfo
->Id
) {
4575 /* The previous instruction wrote to the (fake) vertex point size
4576 * result register. Now we need to clamp that value to the min/max
4577 * point size range, putting the result into the real point size
4579 * Note that we can't do this easily at the end of program due to
4580 * possible early return.
4582 set_insn_start(t
, ureg_get_instruction_number(ureg
));
4584 ureg_writemask(t
->outputs
[t
->pointSizeOutIndex
], WRITEMASK_X
),
4585 ureg_src(t
->outputs
[t
->pointSizeOutIndex
]),
4586 ureg_swizzle(t
->pointSizeConst
, 1,1,1,1));
4587 ureg_MIN(t
->ureg
, ureg_writemask(t
->pointSizeResult
, WRITEMASK_X
),
4588 ureg_src(t
->outputs
[t
->pointSizeOutIndex
]),
4589 ureg_swizzle(t
->pointSizeConst
, 2,2,2,2));
4591 t
->prevInstWrotePointSize
= GL_FALSE
;
4594 /* Fix up all emitted labels:
4596 for (i
= 0; i
< t
->labels_count
; i
++) {
4597 ureg_fixup_label(ureg
, t
->labels
[i
].token
,
4598 t
->insn
[t
->labels
[i
].branch_target
]);
4605 FREE(t
->immediates
);
4608 debug_printf("%s: translate error flag set\n", __FUNCTION__
);
4613 /* ----------------------------- End TGSI code ------------------------------ */
4616 * Convert a shader's GLSL IR into a Mesa gl_program, although without
4617 * generating Mesa IR.
4619 static struct gl_program
*
4620 get_mesa_program(struct gl_context
*ctx
,
4621 struct gl_shader_program
*shader_program
,
4622 struct gl_shader
*shader
)
4624 glsl_to_tgsi_visitor
* v
= new glsl_to_tgsi_visitor();
4625 struct gl_program
*prog
;
4627 const char *target_string
;
4629 struct gl_shader_compiler_options
*options
=
4630 &ctx
->ShaderCompilerOptions
[_mesa_shader_type_to_index(shader
->Type
)];
4632 switch (shader
->Type
) {
4633 case GL_VERTEX_SHADER
:
4634 target
= GL_VERTEX_PROGRAM_ARB
;
4635 target_string
= "vertex";
4637 case GL_FRAGMENT_SHADER
:
4638 target
= GL_FRAGMENT_PROGRAM_ARB
;
4639 target_string
= "fragment";
4641 case GL_GEOMETRY_SHADER
:
4642 target
= GL_GEOMETRY_PROGRAM_NV
;
4643 target_string
= "geometry";
4646 assert(!"should not be reached");
4650 validate_ir_tree(shader
->ir
);
4652 prog
= ctx
->Driver
.NewProgram(ctx
, target
, shader_program
->Name
);
4655 prog
->Parameters
= _mesa_new_parameter_list();
4656 prog
->Varying
= _mesa_new_parameter_list();
4657 prog
->Attributes
= _mesa_new_parameter_list();
4660 v
->shader_program
= shader_program
;
4661 v
->options
= options
;
4662 v
->glsl_version
= ctx
->Const
.GLSLVersion
;
4664 add_uniforms_to_parameters_list(shader_program
, shader
, prog
);
4666 /* Emit intermediate IR for main(). */
4667 visit_exec_list(shader
->ir
, v
);
4669 /* Now emit bodies for any functions that were used. */
4671 progress
= GL_FALSE
;
4673 foreach_iter(exec_list_iterator
, iter
, v
->function_signatures
) {
4674 function_entry
*entry
= (function_entry
*)iter
.get();
4676 if (!entry
->bgn_inst
) {
4677 v
->current_function
= entry
;
4679 entry
->bgn_inst
= v
->emit(NULL
, TGSI_OPCODE_BGNSUB
);
4680 entry
->bgn_inst
->function
= entry
;
4682 visit_exec_list(&entry
->sig
->body
, v
);
4684 glsl_to_tgsi_instruction
*last
;
4685 last
= (glsl_to_tgsi_instruction
*)v
->instructions
.get_tail();
4686 if (last
->op
!= TGSI_OPCODE_RET
)
4687 v
->emit(NULL
, TGSI_OPCODE_RET
);
4689 glsl_to_tgsi_instruction
*end
;
4690 end
= v
->emit(NULL
, TGSI_OPCODE_ENDSUB
);
4691 end
->function
= entry
;
4699 /* Print out some information (for debugging purposes) used by the
4700 * optimization passes. */
4701 for (i
=0; i
< v
->next_temp
; i
++) {
4702 int fr
= v
->get_first_temp_read(i
);
4703 int fw
= v
->get_first_temp_write(i
);
4704 int lr
= v
->get_last_temp_read(i
);
4705 int lw
= v
->get_last_temp_write(i
);
4707 printf("Temp %d: FR=%3d FW=%3d LR=%3d LW=%3d\n", i
, fr
, fw
, lr
, lw
);
4712 /* Remove reads to output registers, and to varyings in vertex shaders. */
4713 v
->remove_output_reads(PROGRAM_OUTPUT
);
4714 if (target
== GL_VERTEX_PROGRAM_ARB
)
4715 v
->remove_output_reads(PROGRAM_VARYING
);
4717 /* Perform optimizations on the instructions in the glsl_to_tgsi_visitor. */
4719 v
->copy_propagate();
4720 while (v
->eliminate_dead_code_advanced());
4722 /* FIXME: These passes to optimize temporary registers don't work when there
4723 * is indirect addressing of the temporary register space. We need proper
4724 * array support so that we don't have to give up these passes in every
4725 * shader that uses arrays.
4727 if (!v
->indirect_addr_temps
) {
4728 v
->eliminate_dead_code();
4729 v
->merge_registers();
4730 v
->renumber_registers();
4733 /* Write the END instruction. */
4734 v
->emit(NULL
, TGSI_OPCODE_END
);
4736 if (ctx
->Shader
.Flags
& GLSL_DUMP
) {
4738 printf("GLSL IR for linked %s program %d:\n", target_string
,
4739 shader_program
->Name
);
4740 _mesa_print_ir(shader
->ir
, NULL
);
4745 prog
->Instructions
= NULL
;
4746 prog
->NumInstructions
= 0;
4748 do_set_program_inouts(shader
->ir
, prog
);
4749 count_resources(v
, prog
);
4751 check_resources(ctx
, shader_program
, v
, prog
);
4753 _mesa_reference_program(ctx
, &shader
->Program
, prog
);
4755 struct st_vertex_program
*stvp
;
4756 struct st_fragment_program
*stfp
;
4757 struct st_geometry_program
*stgp
;
4759 switch (shader
->Type
) {
4760 case GL_VERTEX_SHADER
:
4761 stvp
= (struct st_vertex_program
*)prog
;
4762 stvp
->glsl_to_tgsi
= v
;
4764 case GL_FRAGMENT_SHADER
:
4765 stfp
= (struct st_fragment_program
*)prog
;
4766 stfp
->glsl_to_tgsi
= v
;
4768 case GL_GEOMETRY_SHADER
:
4769 stgp
= (struct st_geometry_program
*)prog
;
4770 stgp
->glsl_to_tgsi
= v
;
4773 assert(!"should not be reached");
4783 st_new_shader(struct gl_context
*ctx
, GLuint name
, GLuint type
)
4785 struct gl_shader
*shader
;
4786 assert(type
== GL_FRAGMENT_SHADER
|| type
== GL_VERTEX_SHADER
||
4787 type
== GL_GEOMETRY_SHADER_ARB
);
4788 shader
= rzalloc(NULL
, struct gl_shader
);
4790 shader
->Type
= type
;
4791 shader
->Name
= name
;
4792 _mesa_init_shader(ctx
, shader
);
4797 struct gl_shader_program
*
4798 st_new_shader_program(struct gl_context
*ctx
, GLuint name
)
4800 struct gl_shader_program
*shProg
;
4801 shProg
= rzalloc(NULL
, struct gl_shader_program
);
4803 shProg
->Name
= name
;
4804 _mesa_init_shader_program(ctx
, shProg
);
4811 * Called via ctx->Driver.LinkShader()
4812 * This actually involves converting GLSL IR into an intermediate TGSI-like IR
4813 * with code lowering and other optimizations.
4816 st_link_shader(struct gl_context
*ctx
, struct gl_shader_program
*prog
)
4818 assert(prog
->LinkStatus
);
4820 for (unsigned i
= 0; i
< MESA_SHADER_TYPES
; i
++) {
4821 if (prog
->_LinkedShaders
[i
] == NULL
)
4825 exec_list
*ir
= prog
->_LinkedShaders
[i
]->ir
;
4826 const struct gl_shader_compiler_options
*options
=
4827 &ctx
->ShaderCompilerOptions
[_mesa_shader_type_to_index(prog
->_LinkedShaders
[i
]->Type
)];
4833 do_mat_op_to_vec(ir
);
4834 lower_instructions(ir
, (MOD_TO_FRACT
| DIV_TO_MUL_RCP
| EXP_TO_EXP2
4836 | ((options
->EmitNoPow
) ? POW_TO_EXP2
: 0)));
4838 progress
= do_lower_jumps(ir
, true, true, options
->EmitNoMainReturn
, options
->EmitNoCont
, options
->EmitNoLoops
) || progress
;
4840 progress
= do_common_optimization(ir
, true, options
->MaxUnrollIterations
) || progress
;
4842 progress
= lower_quadop_vector(ir
, false) || progress
;
4844 if (options
->EmitNoIfs
) {
4845 progress
= lower_discard(ir
) || progress
;
4846 progress
= lower_if_to_cond_assign(ir
) || progress
;
4849 if (options
->EmitNoNoise
)
4850 progress
= lower_noise(ir
) || progress
;
4852 /* If there are forms of indirect addressing that the driver
4853 * cannot handle, perform the lowering pass.
4855 if (options
->EmitNoIndirectInput
|| options
->EmitNoIndirectOutput
4856 || options
->EmitNoIndirectTemp
|| options
->EmitNoIndirectUniform
)
4858 lower_variable_index_to_cond_assign(ir
,
4859 options
->EmitNoIndirectInput
,
4860 options
->EmitNoIndirectOutput
,
4861 options
->EmitNoIndirectTemp
,
4862 options
->EmitNoIndirectUniform
)
4865 progress
= do_vec_index_to_cond_assign(ir
) || progress
;
4868 validate_ir_tree(ir
);
4871 for (unsigned i
= 0; i
< MESA_SHADER_TYPES
; i
++) {
4872 struct gl_program
*linked_prog
;
4874 if (prog
->_LinkedShaders
[i
] == NULL
)
4877 linked_prog
= get_mesa_program(ctx
, prog
, prog
->_LinkedShaders
[i
]);
4882 switch (prog
->_LinkedShaders
[i
]->Type
) {
4883 case GL_VERTEX_SHADER
:
4884 _mesa_reference_vertprog(ctx
, &prog
->VertexProgram
,
4885 (struct gl_vertex_program
*)linked_prog
);
4886 ok
= ctx
->Driver
.ProgramStringNotify(ctx
, GL_VERTEX_PROGRAM_ARB
,
4889 case GL_FRAGMENT_SHADER
:
4890 _mesa_reference_fragprog(ctx
, &prog
->FragmentProgram
,
4891 (struct gl_fragment_program
*)linked_prog
);
4892 ok
= ctx
->Driver
.ProgramStringNotify(ctx
, GL_FRAGMENT_PROGRAM_ARB
,
4895 case GL_GEOMETRY_SHADER
:
4896 _mesa_reference_geomprog(ctx
, &prog
->GeometryProgram
,
4897 (struct gl_geometry_program
*)linked_prog
);
4898 ok
= ctx
->Driver
.ProgramStringNotify(ctx
, GL_GEOMETRY_PROGRAM_NV
,
4907 _mesa_reference_program(ctx
, &linked_prog
, NULL
);
4915 * Link a GLSL shader program. Called via glLinkProgram().
4918 st_glsl_link_shader(struct gl_context
*ctx
, struct gl_shader_program
*prog
)
4922 _mesa_clear_shader_program_data(ctx
, prog
);
4924 prog
->LinkStatus
= GL_TRUE
;
4926 for (i
= 0; i
< prog
->NumShaders
; i
++) {
4927 if (!prog
->Shaders
[i
]->CompileStatus
) {
4928 fail_link(prog
, "linking with uncompiled shader");
4929 prog
->LinkStatus
= GL_FALSE
;
4933 prog
->Varying
= _mesa_new_parameter_list();
4934 _mesa_reference_vertprog(ctx
, &prog
->VertexProgram
, NULL
);
4935 _mesa_reference_fragprog(ctx
, &prog
->FragmentProgram
, NULL
);
4936 _mesa_reference_geomprog(ctx
, &prog
->GeometryProgram
, NULL
);
4938 if (prog
->LinkStatus
) {
4939 link_shaders(ctx
, prog
);
4942 if (prog
->LinkStatus
) {
4943 if (!ctx
->Driver
.LinkShader(ctx
, prog
)) {
4944 prog
->LinkStatus
= GL_FALSE
;
4948 set_uniform_initializers(ctx
, prog
);
4950 if (ctx
->Shader
.Flags
& GLSL_DUMP
) {
4951 if (!prog
->LinkStatus
) {
4952 printf("GLSL shader program %d failed to link\n", prog
->Name
);
4955 if (prog
->InfoLog
&& prog
->InfoLog
[0] != 0) {
4956 printf("GLSL shader program %d info log:\n", prog
->Name
);
4957 printf("%s\n", prog
->InfoLog
);