1 /**************************************************************************
3 * Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
34 #include "pipe/p_compiler.h"
35 #include "pipe/p_context.h"
36 #include "pipe/p_screen.h"
37 #include "pipe/p_shader_tokens.h"
38 #include "pipe/p_state.h"
39 #include "tgsi/tgsi_ureg.h"
40 #include "st_mesa_to_tgsi.h"
41 #include "st_context.h"
42 #include "program/prog_instruction.h"
43 #include "program/prog_parameter.h"
44 #include "util/u_debug.h"
45 #include "util/u_math.h"
46 #include "util/u_memory.h"
49 #define PROGRAM_ANY_CONST ((1 << PROGRAM_LOCAL_PARAM) | \
50 (1 << PROGRAM_ENV_PARAM) | \
51 (1 << PROGRAM_STATE_VAR) | \
52 (1 << PROGRAM_NAMED_PARAM) | \
53 (1 << PROGRAM_CONSTANT) | \
54 (1 << PROGRAM_UNIFORM))
58 unsigned branch_target
;
64 * Intermediate state used during shader translation.
67 struct ureg_program
*ureg
;
69 struct ureg_dst temps
[MAX_PROGRAM_TEMPS
];
70 struct ureg_src
*constants
;
71 struct ureg_dst outputs
[PIPE_MAX_SHADER_OUTPUTS
];
72 struct ureg_src inputs
[PIPE_MAX_SHADER_INPUTS
];
73 struct ureg_dst address
[1];
74 struct ureg_src samplers
[PIPE_MAX_SAMPLERS
];
75 struct ureg_src systemValues
[SYSTEM_VALUE_MAX
];
77 /* Extra info for handling point size clamping in vertex shader */
78 struct ureg_dst pointSizeResult
; /**< Actual point size output register */
79 struct ureg_src pointSizeConst
; /**< Point size range constant register */
80 GLint pointSizeOutIndex
; /**< Temp point size output register */
81 GLboolean prevInstWrotePointSize
;
83 const GLuint
*inputMapping
;
84 const GLuint
*outputMapping
;
86 /* For every instruction that contains a label (eg CALL), keep
87 * details so that we can go back afterwards and emit the correct
88 * tgsi instruction number for each label.
92 unsigned labels_count
;
94 /* Keep a record of the tgsi instruction number that each mesa
95 * instruction starts at, will be used to fix up labels after
102 unsigned procType
; /**< TGSI_PROCESSOR_VERTEX/FRAGMENT */
108 /** Map Mesa's SYSTEM_VALUE_x to TGSI_SEMANTIC_x */
109 static unsigned mesa_sysval_to_semantic
[SYSTEM_VALUE_MAX
] = {
111 TGSI_SEMANTIC_INSTANCEID
116 * Make note of a branch to a label in the TGSI code.
117 * After we've emitted all instructions, we'll go over the list
118 * of labels built here and patch the TGSI code with the actual
119 * location of each label.
121 static unsigned *get_label( struct st_translate
*t
,
122 unsigned branch_target
)
126 if (t
->labels_count
+ 1 >= t
->labels_size
) {
127 unsigned old_size
= t
->labels_size
;
128 t
->labels_size
= 1 << (util_logbase2(t
->labels_size
) + 1);
129 t
->labels
= REALLOC( t
->labels
,
130 old_size
* sizeof t
->labels
[0],
131 t
->labels_size
* sizeof t
->labels
[0] );
132 if (t
->labels
== NULL
) {
133 static unsigned dummy
;
139 i
= t
->labels_count
++;
140 t
->labels
[i
].branch_target
= branch_target
;
141 return &t
->labels
[i
].token
;
146 * Called prior to emitting the TGSI code for each Mesa instruction.
147 * Allocate additional space for instructions if needed.
148 * Update the insn[] array so the next Mesa instruction points to
149 * the next TGSI instruction.
151 static void set_insn_start( struct st_translate
*t
,
154 if (t
->insn_count
+ 1 >= t
->insn_size
) {
155 unsigned old_size
= t
->insn_size
;
156 t
->insn_size
= 1 << (util_logbase2(t
->insn_size
) + 1);
157 t
->insn
= REALLOC( t
->insn
,
158 old_size
* sizeof t
->insn
[0],
159 t
->insn_size
* sizeof t
->insn
[0] );
160 if (t
->insn
== NULL
) {
166 t
->insn
[t
->insn_count
++] = start
;
171 * Map a Mesa dst register to a TGSI ureg_dst register.
173 static struct ureg_dst
174 dst_register( struct st_translate
*t
,
175 gl_register_file file
,
179 case PROGRAM_UNDEFINED
:
180 return ureg_dst_undef();
182 case PROGRAM_TEMPORARY
:
183 if (ureg_dst_is_undef(t
->temps
[index
]))
184 t
->temps
[index
] = ureg_DECL_temporary( t
->ureg
);
186 return t
->temps
[index
];
189 if (t
->procType
== TGSI_PROCESSOR_VERTEX
&& index
== VERT_RESULT_PSIZ
)
190 t
->prevInstWrotePointSize
= GL_TRUE
;
192 if (t
->procType
== TGSI_PROCESSOR_VERTEX
)
193 assert(index
< VERT_RESULT_MAX
);
194 else if (t
->procType
== TGSI_PROCESSOR_FRAGMENT
)
195 assert(index
< FRAG_RESULT_MAX
);
197 assert(index
< GEOM_RESULT_MAX
);
199 assert(t
->outputMapping
[index
] < Elements(t
->outputs
));
201 return t
->outputs
[t
->outputMapping
[index
]];
203 case PROGRAM_ADDRESS
:
204 return t
->address
[index
];
208 return ureg_dst_undef();
214 * Map a Mesa src register to a TGSI ureg_src register.
216 static struct ureg_src
217 src_register( struct st_translate
*t
,
218 gl_register_file file
,
222 case PROGRAM_UNDEFINED
:
223 return ureg_src_undef();
225 case PROGRAM_TEMPORARY
:
227 if (ureg_dst_is_undef(t
->temps
[index
]))
228 t
->temps
[index
] = ureg_DECL_temporary( t
->ureg
);
229 assert(index
< Elements(t
->temps
));
230 return ureg_src(t
->temps
[index
]);
232 case PROGRAM_NAMED_PARAM
:
233 case PROGRAM_ENV_PARAM
:
234 case PROGRAM_LOCAL_PARAM
:
235 case PROGRAM_UNIFORM
:
237 return t
->constants
[index
];
238 case PROGRAM_STATE_VAR
:
239 case PROGRAM_CONSTANT
: /* ie, immediate */
241 return ureg_DECL_constant( t
->ureg
, 0 );
243 return t
->constants
[index
];
246 assert(t
->inputMapping
[index
] < Elements(t
->inputs
));
247 return t
->inputs
[t
->inputMapping
[index
]];
250 assert(t
->outputMapping
[index
] < Elements(t
->outputs
));
251 return ureg_src(t
->outputs
[t
->outputMapping
[index
]]); /* not needed? */
253 case PROGRAM_ADDRESS
:
254 return ureg_src(t
->address
[index
]);
256 case PROGRAM_SYSTEM_VALUE
:
257 assert(index
< Elements(t
->systemValues
));
258 return t
->systemValues
[index
];
262 return ureg_src_undef();
268 * Map mesa texture target to TGSI texture target.
271 translate_texture_target( GLuint textarget
,
275 switch( textarget
) {
276 case TEXTURE_1D_INDEX
: return TGSI_TEXTURE_SHADOW1D
;
277 case TEXTURE_2D_INDEX
: return TGSI_TEXTURE_SHADOW2D
;
278 case TEXTURE_RECT_INDEX
: return TGSI_TEXTURE_SHADOWRECT
;
283 switch( textarget
) {
284 case TEXTURE_1D_INDEX
: return TGSI_TEXTURE_1D
;
285 case TEXTURE_2D_INDEX
: return TGSI_TEXTURE_2D
;
286 case TEXTURE_3D_INDEX
: return TGSI_TEXTURE_3D
;
287 case TEXTURE_CUBE_INDEX
: return TGSI_TEXTURE_CUBE
;
288 case TEXTURE_RECT_INDEX
: return TGSI_TEXTURE_RECT
;
291 return TGSI_TEXTURE_1D
;
297 * Create a TGSI ureg_dst register from a Mesa dest register.
299 static struct ureg_dst
300 translate_dst( struct st_translate
*t
,
301 const struct prog_dst_register
*DstReg
,
304 struct ureg_dst dst
= dst_register( t
,
308 dst
= ureg_writemask( dst
,
312 dst
= ureg_saturate( dst
);
315 dst
= ureg_dst_indirect( dst
, ureg_src(t
->address
[0]) );
322 * Create a TGSI ureg_src register from a Mesa src register.
324 static struct ureg_src
325 translate_src( struct st_translate
*t
,
326 const struct prog_src_register
*SrcReg
)
328 struct ureg_src src
= src_register( t
, SrcReg
->File
, SrcReg
->Index
);
330 if (t
->procType
== TGSI_PROCESSOR_GEOMETRY
&& SrcReg
->HasIndex2
) {
331 src
= src_register( t
, SrcReg
->File
, SrcReg
->Index2
);
332 if (SrcReg
->RelAddr2
)
333 src
= ureg_src_dimension_indirect( src
, ureg_src(t
->address
[0]),
336 src
= ureg_src_dimension( src
, SrcReg
->Index
);
339 src
= ureg_swizzle( src
,
340 GET_SWZ( SrcReg
->Swizzle
, 0 ) & 0x3,
341 GET_SWZ( SrcReg
->Swizzle
, 1 ) & 0x3,
342 GET_SWZ( SrcReg
->Swizzle
, 2 ) & 0x3,
343 GET_SWZ( SrcReg
->Swizzle
, 3 ) & 0x3);
345 if (SrcReg
->Negate
== NEGATE_XYZW
)
346 src
= ureg_negate(src
);
351 if (SrcReg
->RelAddr
) {
352 src
= ureg_src_indirect( src
, ureg_src(t
->address
[0]));
353 if (SrcReg
->File
!= PROGRAM_INPUT
&&
354 SrcReg
->File
!= PROGRAM_OUTPUT
) {
355 /* If SrcReg->Index was negative, it was set to zero in
356 * src_register(). Reassign it now. But don't do this
357 * for input/output regs since they get remapped while
358 * const buffers don't.
360 src
.Index
= SrcReg
->Index
;
368 static struct ureg_src
swizzle_4v( struct ureg_src src
,
369 const unsigned *swz
)
371 return ureg_swizzle( src
, swz
[0], swz
[1], swz
[2], swz
[3] );
376 * Translate a SWZ instruction into a MOV, MUL or MAD instruction. EG:
382 * MAD dst {1,-1,0,0}, src.xyxx, {0,0,1,0}
384 static void emit_swz( struct st_translate
*t
,
386 const struct prog_src_register
*SrcReg
)
388 struct ureg_program
*ureg
= t
->ureg
;
389 struct ureg_src src
= src_register( t
, SrcReg
->File
, SrcReg
->Index
);
391 unsigned negate_mask
= SrcReg
->Negate
;
393 unsigned one_mask
= ((GET_SWZ(SrcReg
->Swizzle
, 0) == SWIZZLE_ONE
) << 0 |
394 (GET_SWZ(SrcReg
->Swizzle
, 1) == SWIZZLE_ONE
) << 1 |
395 (GET_SWZ(SrcReg
->Swizzle
, 2) == SWIZZLE_ONE
) << 2 |
396 (GET_SWZ(SrcReg
->Swizzle
, 3) == SWIZZLE_ONE
) << 3);
398 unsigned zero_mask
= ((GET_SWZ(SrcReg
->Swizzle
, 0) == SWIZZLE_ZERO
) << 0 |
399 (GET_SWZ(SrcReg
->Swizzle
, 1) == SWIZZLE_ZERO
) << 1 |
400 (GET_SWZ(SrcReg
->Swizzle
, 2) == SWIZZLE_ZERO
) << 2 |
401 (GET_SWZ(SrcReg
->Swizzle
, 3) == SWIZZLE_ZERO
) << 3);
403 unsigned negative_one_mask
= one_mask
& negate_mask
;
404 unsigned positive_one_mask
= one_mask
& ~negate_mask
;
408 unsigned mul_swizzle
[4] = {0,0,0,0};
409 unsigned add_swizzle
[4] = {0,0,0,0};
410 unsigned src_swizzle
[4] = {0,0,0,0};
411 boolean need_add
= FALSE
;
412 boolean need_mul
= FALSE
;
414 if (dst
.WriteMask
== 0)
417 /* Is this just a MOV?
419 if (zero_mask
== 0 &&
421 (negate_mask
== 0 || negate_mask
== TGSI_WRITEMASK_XYZW
))
423 ureg_MOV( ureg
, dst
, translate_src( t
, SrcReg
));
429 #define IMM_NEG_ONE 2
431 imm
= ureg_imm3f( ureg
, 0, 1, -1 );
433 for (i
= 0; i
< 4; i
++) {
434 unsigned bit
= 1 << i
;
436 if (dst
.WriteMask
& bit
) {
437 if (positive_one_mask
& bit
) {
438 mul_swizzle
[i
] = IMM_ZERO
;
439 add_swizzle
[i
] = IMM_ONE
;
442 else if (negative_one_mask
& bit
) {
443 mul_swizzle
[i
] = IMM_ZERO
;
444 add_swizzle
[i
] = IMM_NEG_ONE
;
447 else if (zero_mask
& bit
) {
448 mul_swizzle
[i
] = IMM_ZERO
;
449 add_swizzle
[i
] = IMM_ZERO
;
453 add_swizzle
[i
] = IMM_ZERO
;
454 src_swizzle
[i
] = GET_SWZ(SrcReg
->Swizzle
, i
);
456 if (negate_mask
& bit
) {
457 mul_swizzle
[i
] = IMM_NEG_ONE
;
460 mul_swizzle
[i
] = IMM_ONE
;
466 if (need_mul
&& need_add
) {
469 swizzle_4v( src
, src_swizzle
),
470 swizzle_4v( imm
, mul_swizzle
),
471 swizzle_4v( imm
, add_swizzle
) );
476 swizzle_4v( src
, src_swizzle
),
477 swizzle_4v( imm
, mul_swizzle
) );
482 swizzle_4v( imm
, add_swizzle
) );
495 * Negate the value of DDY to match GL semantics where (0,0) is the
496 * lower-left corner of the window.
497 * Note that the GL_ARB_fragment_coord_conventions extension will
498 * effect this someday.
500 static void emit_ddy( struct st_translate
*t
,
502 const struct prog_src_register
*SrcReg
)
504 struct ureg_program
*ureg
= t
->ureg
;
505 struct ureg_src src
= translate_src( t
, SrcReg
);
506 src
= ureg_negate( src
);
507 ureg_DDY( ureg
, dst
, src
);
513 translate_opcode( unsigned op
)
517 return TGSI_OPCODE_ARL
;
519 return TGSI_OPCODE_ABS
;
521 return TGSI_OPCODE_ADD
;
523 return TGSI_OPCODE_BGNLOOP
;
525 return TGSI_OPCODE_BGNSUB
;
527 return TGSI_OPCODE_BRA
;
529 return TGSI_OPCODE_BRK
;
531 return TGSI_OPCODE_CAL
;
533 return TGSI_OPCODE_CMP
;
535 return TGSI_OPCODE_CONT
;
537 return TGSI_OPCODE_COS
;
539 return TGSI_OPCODE_DDX
;
541 return TGSI_OPCODE_DDY
;
543 return TGSI_OPCODE_DP2
;
545 return TGSI_OPCODE_DP2A
;
547 return TGSI_OPCODE_DP3
;
549 return TGSI_OPCODE_DP4
;
551 return TGSI_OPCODE_DPH
;
553 return TGSI_OPCODE_DST
;
555 return TGSI_OPCODE_ELSE
;
556 case OPCODE_EMIT_VERTEX
:
557 return TGSI_OPCODE_EMIT
;
558 case OPCODE_END_PRIMITIVE
:
559 return TGSI_OPCODE_ENDPRIM
;
561 return TGSI_OPCODE_ENDIF
;
563 return TGSI_OPCODE_ENDLOOP
;
565 return TGSI_OPCODE_ENDSUB
;
567 return TGSI_OPCODE_EX2
;
569 return TGSI_OPCODE_EXP
;
571 return TGSI_OPCODE_FLR
;
573 return TGSI_OPCODE_FRC
;
575 return TGSI_OPCODE_IF
;
577 return TGSI_OPCODE_TRUNC
;
579 return TGSI_OPCODE_KIL
;
581 return TGSI_OPCODE_KILP
;
583 return TGSI_OPCODE_LG2
;
585 return TGSI_OPCODE_LOG
;
587 return TGSI_OPCODE_LIT
;
589 return TGSI_OPCODE_LRP
;
591 return TGSI_OPCODE_MAD
;
593 return TGSI_OPCODE_MAX
;
595 return TGSI_OPCODE_MIN
;
597 return TGSI_OPCODE_MOV
;
599 return TGSI_OPCODE_MUL
;
601 return TGSI_OPCODE_NOP
;
603 return TGSI_OPCODE_NRM
;
605 return TGSI_OPCODE_NRM4
;
607 return TGSI_OPCODE_POW
;
609 return TGSI_OPCODE_RCP
;
611 return TGSI_OPCODE_RET
;
613 return TGSI_OPCODE_RSQ
;
615 return TGSI_OPCODE_SCS
;
617 return TGSI_OPCODE_SEQ
;
619 return TGSI_OPCODE_SGE
;
621 return TGSI_OPCODE_SGT
;
623 return TGSI_OPCODE_SIN
;
625 return TGSI_OPCODE_SLE
;
627 return TGSI_OPCODE_SLT
;
629 return TGSI_OPCODE_SNE
;
631 return TGSI_OPCODE_SSG
;
633 return TGSI_OPCODE_SUB
;
635 return TGSI_OPCODE_TEX
;
637 return TGSI_OPCODE_TXB
;
639 return TGSI_OPCODE_TXD
;
641 return TGSI_OPCODE_TXL
;
643 return TGSI_OPCODE_TXP
;
645 return TGSI_OPCODE_XPD
;
647 return TGSI_OPCODE_END
;
650 return TGSI_OPCODE_NOP
;
657 struct st_translate
*t
,
658 const struct prog_instruction
*inst
)
660 struct ureg_program
*ureg
= t
->ureg
;
662 struct ureg_dst dst
[1];
663 struct ureg_src src
[4];
667 num_dst
= _mesa_num_inst_dst_regs( inst
->Opcode
);
668 num_src
= _mesa_num_inst_src_regs( inst
->Opcode
);
671 dst
[0] = translate_dst( t
,
673 inst
->SaturateMode
);
675 for (i
= 0; i
< num_src
; i
++)
676 src
[i
] = translate_src( t
, &inst
->SrcReg
[i
] );
678 switch( inst
->Opcode
) {
680 emit_swz( t
, dst
[0], &inst
->SrcReg
[0] );
688 debug_assert(num_dst
== 0);
689 ureg_label_insn( ureg
,
690 translate_opcode( inst
->Opcode
),
692 get_label( t
, inst
->BranchTarget
));
700 src
[num_src
++] = t
->samplers
[inst
->TexSrcUnit
];
702 translate_opcode( inst
->Opcode
),
704 translate_texture_target( inst
->TexSrcTarget
,
710 dst
[0] = ureg_writemask(dst
[0], TGSI_WRITEMASK_XY
);
712 translate_opcode( inst
->Opcode
),
718 dst
[0] = ureg_writemask(dst
[0], TGSI_WRITEMASK_XYZ
);
720 translate_opcode( inst
->Opcode
),
729 /* At some point, a motivated person could add a better
730 * implementation of noise. Currently not even the nvidia
731 * binary drivers do anything more than this. In any case, the
732 * place to do this is in the GL state tracker, not the poor
735 ureg_MOV( ureg
, dst
[0], ureg_imm1f(ureg
, 0.5) );
739 emit_ddy( t
, dst
[0], &inst
->SrcReg
[0] );
744 translate_opcode( inst
->Opcode
),
753 * Emit the TGSI instructions to adjust the WPOS pixel center convention
756 emit_adjusted_wpos( struct st_translate
*t
,
757 const struct gl_program
*program
, GLfloat value
)
759 struct ureg_program
*ureg
= t
->ureg
;
760 struct ureg_dst wpos_temp
= ureg_DECL_temporary(ureg
);
761 struct ureg_src wpos_input
= t
->inputs
[t
->inputMapping
[FRAG_ATTRIB_WPOS
]];
763 /* Note that we bias X and Y and pass Z and W through unchanged.
764 * The shader might also use gl_FragCoord.w and .z.
766 ureg_ADD(ureg
, wpos_temp
, wpos_input
,
767 ureg_imm4f(ureg
, value
, value
, 0.0f
, 0.0f
));
769 t
->inputs
[t
->inputMapping
[FRAG_ATTRIB_WPOS
]] = ureg_src(wpos_temp
);
774 * Emit the TGSI instructions for inverting the WPOS y coordinate.
777 emit_inverted_wpos( struct st_translate
*t
,
778 const struct gl_program
*program
)
780 struct ureg_program
*ureg
= t
->ureg
;
782 /* Fragment program uses fragment position input.
783 * Need to replace instances of INPUT[WPOS] with temp T
784 * where T = INPUT[WPOS] by y is inverted.
786 static const gl_state_index winSizeState
[STATE_LENGTH
]
787 = { STATE_INTERNAL
, STATE_FB_SIZE
, 0, 0, 0 };
789 /* XXX: note we are modifying the incoming shader here! Need to
790 * do this before emitting the constant decls below, or this
793 unsigned winHeightConst
= _mesa_add_state_reference(program
->Parameters
,
796 struct ureg_src winsize
= ureg_DECL_constant( ureg
, winHeightConst
);
797 struct ureg_dst wpos_temp
;
798 struct ureg_src wpos_input
= t
->inputs
[t
->inputMapping
[FRAG_ATTRIB_WPOS
]];
800 /* MOV wpos_temp, input[wpos]
802 if (wpos_input
.File
== TGSI_FILE_TEMPORARY
)
803 wpos_temp
= ureg_dst(wpos_input
);
805 wpos_temp
= ureg_DECL_temporary( ureg
);
806 ureg_MOV( ureg
, wpos_temp
, wpos_input
);
809 /* SUB wpos_temp.y, winsize_const, wpos_input
812 ureg_writemask(wpos_temp
, TGSI_WRITEMASK_Y
),
816 /* Use wpos_temp as position input from here on:
818 t
->inputs
[t
->inputMapping
[FRAG_ATTRIB_WPOS
]] = ureg_src(wpos_temp
);
823 * Emit fragment position/ooordinate code.
826 emit_wpos(struct st_context
*st
,
827 struct st_translate
*t
,
828 const struct gl_program
*program
,
829 struct ureg_program
*ureg
)
831 const struct gl_fragment_program
*fp
=
832 (const struct gl_fragment_program
*) program
;
833 struct pipe_screen
*pscreen
= st
->pipe
->screen
;
834 boolean invert
= FALSE
;
836 if (fp
->OriginUpperLeft
) {
837 if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT
)) {
839 else if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT
)) {
840 ureg_property_fs_coord_origin(ureg
, TGSI_FS_COORD_ORIGIN_LOWER_LEFT
);
847 if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT
))
848 ureg_property_fs_coord_origin(ureg
, TGSI_FS_COORD_ORIGIN_LOWER_LEFT
);
849 else if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT
))
855 if (fp
->PixelCenterInteger
) {
856 if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER
))
857 ureg_property_fs_coord_pixel_center(ureg
, TGSI_FS_COORD_PIXEL_CENTER_INTEGER
);
858 else if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER
))
859 emit_adjusted_wpos(t
, program
, invert
? 0.5f
: -0.5f
);
864 if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER
)) {
866 else if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER
)) {
867 ureg_property_fs_coord_pixel_center(ureg
, TGSI_FS_COORD_PIXEL_CENTER_INTEGER
);
868 emit_adjusted_wpos(t
, program
, invert
? -0.5f
: 0.5f
);
874 /* we invert after adjustment so that we avoid the MOV to temporary,
875 * and reuse the adjustment ADD instead */
877 emit_inverted_wpos(t
, program
);
882 * OpenGL's fragment gl_FrontFace input is 1 for front-facing, 0 for back.
883 * TGSI uses +1 for front, -1 for back.
884 * This function converts the TGSI value to the GL value. Simply clamping/
885 * saturating the value to [0,1] does the job.
888 emit_face_var( struct st_translate
*t
,
889 const struct gl_program
*program
)
891 struct ureg_program
*ureg
= t
->ureg
;
892 struct ureg_dst face_temp
= ureg_DECL_temporary( ureg
);
893 struct ureg_src face_input
= t
->inputs
[t
->inputMapping
[FRAG_ATTRIB_FACE
]];
895 /* MOV_SAT face_temp, input[face]
897 face_temp
= ureg_saturate( face_temp
);
898 ureg_MOV( ureg
, face_temp
, face_input
);
900 /* Use face_temp as face input from here on:
902 t
->inputs
[t
->inputMapping
[FRAG_ATTRIB_FACE
]] = ureg_src(face_temp
);
907 emit_edgeflags( struct st_translate
*t
,
908 const struct gl_program
*program
)
910 struct ureg_program
*ureg
= t
->ureg
;
911 struct ureg_dst edge_dst
= t
->outputs
[t
->outputMapping
[VERT_RESULT_EDGE
]];
912 struct ureg_src edge_src
= t
->inputs
[t
->inputMapping
[VERT_ATTRIB_EDGEFLAG
]];
914 ureg_MOV( ureg
, edge_dst
, edge_src
);
919 * Translate Mesa program to TGSI format.
920 * \param program the program to translate
921 * \param numInputs number of input registers used
922 * \param inputMapping maps Mesa fragment program inputs to TGSI generic
924 * \param inputSemanticName the TGSI_SEMANTIC flag for each input
925 * \param inputSemanticIndex the semantic index (ex: which texcoord) for
927 * \param interpMode the TGSI_INTERPOLATE_LINEAR/PERSP mode for each input
928 * \param numOutputs number of output registers used
929 * \param outputMapping maps Mesa fragment program outputs to TGSI
931 * \param outputSemanticName the TGSI_SEMANTIC flag for each output
932 * \param outputSemanticIndex the semantic index (ex: which texcoord) for
935 * \return PIPE_OK or PIPE_ERROR_OUT_OF_MEMORY
938 st_translate_mesa_program(
939 struct gl_context
*ctx
,
941 struct ureg_program
*ureg
,
942 const struct gl_program
*program
,
944 const GLuint inputMapping
[],
945 const ubyte inputSemanticName
[],
946 const ubyte inputSemanticIndex
[],
947 const GLuint interpMode
[],
949 const GLuint outputMapping
[],
950 const ubyte outputSemanticName
[],
951 const ubyte outputSemanticIndex
[],
952 boolean passthrough_edgeflags
)
954 struct st_translate translate
, *t
;
956 enum pipe_error ret
= PIPE_OK
;
958 assert(numInputs
<= Elements(t
->inputs
));
959 assert(numOutputs
<= Elements(t
->outputs
));
962 memset(t
, 0, sizeof *t
);
964 t
->procType
= procType
;
965 t
->inputMapping
= inputMapping
;
966 t
->outputMapping
= outputMapping
;
968 t
->pointSizeOutIndex
= -1;
969 t
->prevInstWrotePointSize
= GL_FALSE
;
971 /*_mesa_print_program(program);*/
974 * Declare input attributes.
976 if (procType
== TGSI_PROCESSOR_FRAGMENT
) {
977 for (i
= 0; i
< numInputs
; i
++) {
978 if (program
->InputFlags
[0] & PROG_PARAM_BIT_CYL_WRAP
) {
979 t
->inputs
[i
] = ureg_DECL_fs_input_cyl(ureg
,
980 inputSemanticName
[i
],
981 inputSemanticIndex
[i
],
983 TGSI_CYLINDRICAL_WRAP_X
);
986 t
->inputs
[i
] = ureg_DECL_fs_input(ureg
,
987 inputSemanticName
[i
],
988 inputSemanticIndex
[i
],
993 if (program
->InputsRead
& FRAG_BIT_WPOS
) {
994 /* Must do this after setting up t->inputs, and before
995 * emitting constant references, below:
997 emit_wpos(st_context(ctx
), t
, program
, ureg
);
1000 if (program
->InputsRead
& FRAG_BIT_FACE
) {
1001 emit_face_var( t
, program
);
1005 * Declare output attributes.
1007 for (i
= 0; i
< numOutputs
; i
++) {
1008 switch (outputSemanticName
[i
]) {
1009 case TGSI_SEMANTIC_POSITION
:
1010 t
->outputs
[i
] = ureg_DECL_output( ureg
,
1011 TGSI_SEMANTIC_POSITION
, /* Z / Depth */
1012 outputSemanticIndex
[i
] );
1014 t
->outputs
[i
] = ureg_writemask( t
->outputs
[i
],
1017 case TGSI_SEMANTIC_STENCIL
:
1018 t
->outputs
[i
] = ureg_DECL_output( ureg
,
1019 TGSI_SEMANTIC_STENCIL
, /* Stencil */
1020 outputSemanticIndex
[i
] );
1021 t
->outputs
[i
] = ureg_writemask( t
->outputs
[i
],
1024 case TGSI_SEMANTIC_COLOR
:
1025 t
->outputs
[i
] = ureg_DECL_output( ureg
,
1026 TGSI_SEMANTIC_COLOR
,
1027 outputSemanticIndex
[i
] );
1035 else if (procType
== TGSI_PROCESSOR_GEOMETRY
) {
1036 for (i
= 0; i
< numInputs
; i
++) {
1037 t
->inputs
[i
] = ureg_DECL_gs_input(ureg
,
1039 inputSemanticName
[i
],
1040 inputSemanticIndex
[i
]);
1043 for (i
= 0; i
< numOutputs
; i
++) {
1044 t
->outputs
[i
] = ureg_DECL_output( ureg
,
1045 outputSemanticName
[i
],
1046 outputSemanticIndex
[i
] );
1050 assert(procType
== TGSI_PROCESSOR_VERTEX
);
1052 for (i
= 0; i
< numInputs
; i
++) {
1053 t
->inputs
[i
] = ureg_DECL_vs_input(ureg
, i
);
1056 for (i
= 0; i
< numOutputs
; i
++) {
1057 t
->outputs
[i
] = ureg_DECL_output( ureg
,
1058 outputSemanticName
[i
],
1059 outputSemanticIndex
[i
] );
1060 if ((outputSemanticName
[i
] == TGSI_SEMANTIC_PSIZE
) && program
->Id
) {
1061 /* Writing to the point size result register requires special
1062 * handling to implement clamping.
1064 static const gl_state_index pointSizeClampState
[STATE_LENGTH
]
1065 = { STATE_INTERNAL
, STATE_POINT_SIZE_IMPL_CLAMP
, 0, 0, 0 };
1066 /* XXX: note we are modifying the incoming shader here! Need to
1067 * do this before emitting the constant decls below, or this
1070 unsigned pointSizeClampConst
=
1071 _mesa_add_state_reference(program
->Parameters
,
1072 pointSizeClampState
);
1073 struct ureg_dst psizregtemp
= ureg_DECL_temporary( ureg
);
1074 t
->pointSizeConst
= ureg_DECL_constant( ureg
, pointSizeClampConst
);
1075 t
->pointSizeResult
= t
->outputs
[i
];
1076 t
->pointSizeOutIndex
= i
;
1077 t
->outputs
[i
] = psizregtemp
;
1080 if (passthrough_edgeflags
)
1081 emit_edgeflags( t
, program
);
1084 /* Declare address register.
1086 if (program
->NumAddressRegs
> 0) {
1087 debug_assert( program
->NumAddressRegs
== 1 );
1088 t
->address
[0] = ureg_DECL_address( ureg
);
1091 /* Declare misc input registers
1094 GLbitfield sysInputs
= program
->SystemValuesRead
;
1095 unsigned numSys
= 0;
1096 for (i
= 0; sysInputs
; i
++) {
1097 if (sysInputs
& (1 << i
)) {
1098 unsigned semName
= mesa_sysval_to_semantic
[i
];
1099 t
->systemValues
[i
] = ureg_DECL_system_value(ureg
, numSys
, semName
, 0);
1101 sysInputs
&= ~(1 << i
);
1106 if (program
->IndirectRegisterFiles
& (1 << PROGRAM_TEMPORARY
)) {
1107 /* If temps are accessed with indirect addressing, declare temporaries
1108 * in sequential order. Else, we declare them on demand elsewhere.
1110 for (i
= 0; i
< program
->NumTemporaries
; i
++) {
1111 /* XXX use TGSI_FILE_TEMPORARY_ARRAY when it's supported by ureg */
1112 t
->temps
[i
] = ureg_DECL_temporary( t
->ureg
);
1116 /* Emit constants and immediates. Mesa uses a single index space
1117 * for these, so we put all the translated regs in t->constants.
1119 if (program
->Parameters
) {
1120 t
->constants
= CALLOC( program
->Parameters
->NumParameters
,
1121 sizeof t
->constants
[0] );
1122 if (t
->constants
== NULL
) {
1123 ret
= PIPE_ERROR_OUT_OF_MEMORY
;
1127 for (i
= 0; i
< program
->Parameters
->NumParameters
; i
++) {
1128 switch (program
->Parameters
->Parameters
[i
].Type
) {
1129 case PROGRAM_ENV_PARAM
:
1130 case PROGRAM_LOCAL_PARAM
:
1131 case PROGRAM_STATE_VAR
:
1132 case PROGRAM_NAMED_PARAM
:
1133 case PROGRAM_UNIFORM
:
1134 t
->constants
[i
] = ureg_DECL_constant( ureg
, i
);
1137 /* Emit immediates only when there's no indirect addressing of
1139 * FIXME: Be smarter and recognize param arrays:
1140 * indirect addressing is only valid within the referenced
1143 case PROGRAM_CONSTANT
:
1144 if (program
->IndirectRegisterFiles
& PROGRAM_ANY_CONST
)
1145 t
->constants
[i
] = ureg_DECL_constant( ureg
, i
);
1148 ureg_DECL_immediate( ureg
,
1149 program
->Parameters
->ParameterValues
[i
],
1158 /* texture samplers */
1159 for (i
= 0; i
< ctx
->Const
.MaxTextureImageUnits
; i
++) {
1160 if (program
->SamplersUsed
& (1 << i
)) {
1161 t
->samplers
[i
] = ureg_DECL_sampler( ureg
, i
);
1165 /* Emit each instruction in turn:
1167 for (i
= 0; i
< program
->NumInstructions
; i
++) {
1168 set_insn_start( t
, ureg_get_instruction_number( ureg
));
1169 compile_instruction( t
, &program
->Instructions
[i
] );
1171 if (t
->prevInstWrotePointSize
&& program
->Id
) {
1172 /* The previous instruction wrote to the (fake) vertex point size
1173 * result register. Now we need to clamp that value to the min/max
1174 * point size range, putting the result into the real point size
1176 * Note that we can't do this easily at the end of program due to
1177 * possible early return.
1179 set_insn_start( t
, ureg_get_instruction_number( ureg
));
1181 ureg_writemask(t
->outputs
[t
->pointSizeOutIndex
], WRITEMASK_X
),
1182 ureg_src(t
->outputs
[t
->pointSizeOutIndex
]),
1183 ureg_swizzle(t
->pointSizeConst
, 1,1,1,1));
1184 ureg_MIN( t
->ureg
, ureg_writemask(t
->pointSizeResult
, WRITEMASK_X
),
1185 ureg_src(t
->outputs
[t
->pointSizeOutIndex
]),
1186 ureg_swizzle(t
->pointSizeConst
, 2,2,2,2));
1188 t
->prevInstWrotePointSize
= GL_FALSE
;
1191 /* Fix up all emitted labels:
1193 for (i
= 0; i
< t
->labels_count
; i
++) {
1194 ureg_fixup_label( ureg
,
1196 t
->insn
[t
->labels
[i
].branch_target
] );
1205 debug_printf("%s: translate error flag set\n", __FUNCTION__
);
1213 * Tokens cannot be free with free otherwise the builtin gallium
1214 * malloc debugging will get confused.
1217 st_free_tokens(const struct tgsi_token
*tokens
)
1219 FREE((void *)tokens
);