1 /**************************************************************************
3 * Copyright 2007-2008 VMware, Inc.
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 VMWARE 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"
47 #include "st_glsl_to_tgsi.h" /* for _mesa_sysval_to_semantic */
50 #define PROGRAM_ANY_CONST ((1 << PROGRAM_STATE_VAR) | \
51 (1 << PROGRAM_CONSTANT) | \
52 (1 << PROGRAM_UNIFORM))
55 * Intermediate state used during shader translation.
58 struct ureg_program
*ureg
;
60 struct ureg_dst temps
[MAX_PROGRAM_TEMPS
];
61 struct ureg_src
*constants
;
62 struct ureg_dst outputs
[PIPE_MAX_SHADER_OUTPUTS
];
63 struct ureg_src inputs
[PIPE_MAX_SHADER_INPUTS
];
64 struct ureg_dst address
[1];
65 struct ureg_src samplers
[PIPE_MAX_SAMPLERS
];
66 struct ureg_src systemValues
[SYSTEM_VALUE_MAX
];
68 const GLuint
*inputMapping
;
69 const GLuint
*outputMapping
;
71 unsigned procType
; /**< PIPE_SHADER_VERTEX/FRAGMENT */
76 * Map a Mesa dst register to a TGSI ureg_dst register.
78 static struct ureg_dst
79 dst_register( struct st_translate
*t
,
80 gl_register_file file
,
84 case PROGRAM_UNDEFINED
:
85 return ureg_dst_undef();
87 case PROGRAM_TEMPORARY
:
88 if (ureg_dst_is_undef(t
->temps
[index
]))
89 t
->temps
[index
] = ureg_DECL_temporary( t
->ureg
);
91 return t
->temps
[index
];
94 if (t
->procType
== PIPE_SHADER_VERTEX
)
95 assert(index
< VARYING_SLOT_MAX
);
96 else if (t
->procType
== PIPE_SHADER_FRAGMENT
)
97 assert(index
< FRAG_RESULT_MAX
);
99 assert(index
< VARYING_SLOT_MAX
);
101 assert(t
->outputMapping
[index
] < ARRAY_SIZE(t
->outputs
));
103 return t
->outputs
[t
->outputMapping
[index
]];
105 case PROGRAM_ADDRESS
:
106 return t
->address
[index
];
110 return ureg_dst_undef();
116 * Map a Mesa src register to a TGSI ureg_src register.
118 static struct ureg_src
119 src_register( struct st_translate
*t
,
120 gl_register_file file
,
124 case PROGRAM_UNDEFINED
:
125 return ureg_src_undef();
127 case PROGRAM_TEMPORARY
:
129 assert(index
< ARRAY_SIZE(t
->temps
));
130 if (ureg_dst_is_undef(t
->temps
[index
]))
131 t
->temps
[index
] = ureg_DECL_temporary( t
->ureg
);
132 return ureg_src(t
->temps
[index
]);
134 case PROGRAM_UNIFORM
:
136 return t
->constants
[index
];
137 case PROGRAM_STATE_VAR
:
138 case PROGRAM_CONSTANT
: /* ie, immediate */
140 return ureg_DECL_constant( t
->ureg
, 0 );
142 return t
->constants
[index
];
145 assert(t
->inputMapping
[index
] < ARRAY_SIZE(t
->inputs
));
146 return t
->inputs
[t
->inputMapping
[index
]];
149 assert(t
->outputMapping
[index
] < ARRAY_SIZE(t
->outputs
));
150 return ureg_src(t
->outputs
[t
->outputMapping
[index
]]); /* not needed? */
152 case PROGRAM_ADDRESS
:
153 return ureg_src(t
->address
[index
]);
155 case PROGRAM_SYSTEM_VALUE
:
156 assert(index
< ARRAY_SIZE(t
->systemValues
));
157 return t
->systemValues
[index
];
161 return ureg_src_undef();
167 * Map mesa texture target to TGSI texture target.
170 st_translate_texture_target(GLuint textarget
, GLboolean shadow
)
174 case TEXTURE_1D_INDEX
:
175 return TGSI_TEXTURE_SHADOW1D
;
176 case TEXTURE_2D_INDEX
:
177 return TGSI_TEXTURE_SHADOW2D
;
178 case TEXTURE_RECT_INDEX
:
179 return TGSI_TEXTURE_SHADOWRECT
;
180 case TEXTURE_1D_ARRAY_INDEX
:
181 return TGSI_TEXTURE_SHADOW1D_ARRAY
;
182 case TEXTURE_2D_ARRAY_INDEX
:
183 return TGSI_TEXTURE_SHADOW2D_ARRAY
;
184 case TEXTURE_CUBE_INDEX
:
185 return TGSI_TEXTURE_SHADOWCUBE
;
186 case TEXTURE_CUBE_ARRAY_INDEX
:
187 return TGSI_TEXTURE_SHADOWCUBE_ARRAY
;
194 case TEXTURE_2D_MULTISAMPLE_INDEX
:
195 return TGSI_TEXTURE_2D_MSAA
;
196 case TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX
:
197 return TGSI_TEXTURE_2D_ARRAY_MSAA
;
198 case TEXTURE_BUFFER_INDEX
:
199 return TGSI_TEXTURE_BUFFER
;
200 case TEXTURE_1D_INDEX
:
201 return TGSI_TEXTURE_1D
;
202 case TEXTURE_2D_INDEX
:
203 return TGSI_TEXTURE_2D
;
204 case TEXTURE_3D_INDEX
:
205 return TGSI_TEXTURE_3D
;
206 case TEXTURE_CUBE_INDEX
:
207 return TGSI_TEXTURE_CUBE
;
208 case TEXTURE_CUBE_ARRAY_INDEX
:
209 return TGSI_TEXTURE_CUBE_ARRAY
;
210 case TEXTURE_RECT_INDEX
:
211 return TGSI_TEXTURE_RECT
;
212 case TEXTURE_1D_ARRAY_INDEX
:
213 return TGSI_TEXTURE_1D_ARRAY
;
214 case TEXTURE_2D_ARRAY_INDEX
:
215 return TGSI_TEXTURE_2D_ARRAY
;
216 case TEXTURE_EXTERNAL_INDEX
:
217 return TGSI_TEXTURE_2D
;
219 debug_assert(!"unexpected texture target index");
220 return TGSI_TEXTURE_1D
;
226 * Translate a (1 << TEXTURE_x_INDEX) bit into a TGSI_TEXTURE_x enum.
229 translate_texture_index(GLbitfield texBit
, bool shadow
)
231 int index
= ffs(texBit
);
233 assert(index
- 1 < NUM_TEXTURE_TARGETS
);
234 return st_translate_texture_target(index
- 1, shadow
);
239 * Create a TGSI ureg_dst register from a Mesa dest register.
241 static struct ureg_dst
242 translate_dst( struct st_translate
*t
,
243 const struct prog_dst_register
*DstReg
,
246 struct ureg_dst dst
= dst_register( t
,
250 dst
= ureg_writemask( dst
,
254 dst
= ureg_saturate( dst
);
257 dst
= ureg_dst_indirect( dst
, ureg_src(t
->address
[0]) );
264 * Create a TGSI ureg_src register from a Mesa src register.
266 static struct ureg_src
267 translate_src( struct st_translate
*t
,
268 const struct prog_src_register
*SrcReg
)
270 struct ureg_src src
= src_register( t
, SrcReg
->File
, SrcReg
->Index
);
272 src
= ureg_swizzle( src
,
273 GET_SWZ( SrcReg
->Swizzle
, 0 ) & 0x3,
274 GET_SWZ( SrcReg
->Swizzle
, 1 ) & 0x3,
275 GET_SWZ( SrcReg
->Swizzle
, 2 ) & 0x3,
276 GET_SWZ( SrcReg
->Swizzle
, 3 ) & 0x3);
278 if (SrcReg
->Negate
== NEGATE_XYZW
)
279 src
= ureg_negate(src
);
281 if (SrcReg
->RelAddr
) {
282 src
= ureg_src_indirect( src
, ureg_src(t
->address
[0]));
283 if (SrcReg
->File
!= PROGRAM_INPUT
&&
284 SrcReg
->File
!= PROGRAM_OUTPUT
) {
285 /* If SrcReg->Index was negative, it was set to zero in
286 * src_register(). Reassign it now. But don't do this
287 * for input/output regs since they get remapped while
288 * const buffers don't.
290 src
.Index
= SrcReg
->Index
;
298 static struct ureg_src
swizzle_4v( struct ureg_src src
,
299 const unsigned *swz
)
301 return ureg_swizzle( src
, swz
[0], swz
[1], swz
[2], swz
[3] );
306 * Translate a SWZ instruction into a MOV, MUL or MAD instruction. EG:
312 * MAD dst {1,-1,0,0}, src.xyxx, {0,0,1,0}
314 static void emit_swz( struct st_translate
*t
,
316 const struct prog_src_register
*SrcReg
)
318 struct ureg_program
*ureg
= t
->ureg
;
319 struct ureg_src src
= src_register( t
, SrcReg
->File
, SrcReg
->Index
);
321 unsigned negate_mask
= SrcReg
->Negate
;
323 unsigned one_mask
= ((GET_SWZ(SrcReg
->Swizzle
, 0) == SWIZZLE_ONE
) << 0 |
324 (GET_SWZ(SrcReg
->Swizzle
, 1) == SWIZZLE_ONE
) << 1 |
325 (GET_SWZ(SrcReg
->Swizzle
, 2) == SWIZZLE_ONE
) << 2 |
326 (GET_SWZ(SrcReg
->Swizzle
, 3) == SWIZZLE_ONE
) << 3);
328 unsigned zero_mask
= ((GET_SWZ(SrcReg
->Swizzle
, 0) == SWIZZLE_ZERO
) << 0 |
329 (GET_SWZ(SrcReg
->Swizzle
, 1) == SWIZZLE_ZERO
) << 1 |
330 (GET_SWZ(SrcReg
->Swizzle
, 2) == SWIZZLE_ZERO
) << 2 |
331 (GET_SWZ(SrcReg
->Swizzle
, 3) == SWIZZLE_ZERO
) << 3);
333 unsigned negative_one_mask
= one_mask
& negate_mask
;
334 unsigned positive_one_mask
= one_mask
& ~negate_mask
;
338 unsigned mul_swizzle
[4] = {0,0,0,0};
339 unsigned add_swizzle
[4] = {0,0,0,0};
340 unsigned src_swizzle
[4] = {0,0,0,0};
341 boolean need_add
= FALSE
;
342 boolean need_mul
= FALSE
;
344 if (dst
.WriteMask
== 0)
347 /* Is this just a MOV?
349 if (zero_mask
== 0 &&
351 (negate_mask
== 0 || negate_mask
== TGSI_WRITEMASK_XYZW
))
353 ureg_MOV( ureg
, dst
, translate_src( t
, SrcReg
));
359 #define IMM_NEG_ONE 2
361 imm
= ureg_imm3f( ureg
, 0, 1, -1 );
363 for (i
= 0; i
< 4; i
++) {
364 unsigned bit
= 1 << i
;
366 if (dst
.WriteMask
& bit
) {
367 if (positive_one_mask
& bit
) {
368 mul_swizzle
[i
] = IMM_ZERO
;
369 add_swizzle
[i
] = IMM_ONE
;
372 else if (negative_one_mask
& bit
) {
373 mul_swizzle
[i
] = IMM_ZERO
;
374 add_swizzle
[i
] = IMM_NEG_ONE
;
377 else if (zero_mask
& bit
) {
378 mul_swizzle
[i
] = IMM_ZERO
;
379 add_swizzle
[i
] = IMM_ZERO
;
383 add_swizzle
[i
] = IMM_ZERO
;
384 src_swizzle
[i
] = GET_SWZ(SrcReg
->Swizzle
, i
);
386 if (negate_mask
& bit
) {
387 mul_swizzle
[i
] = IMM_NEG_ONE
;
390 mul_swizzle
[i
] = IMM_ONE
;
396 if (need_mul
&& need_add
) {
399 swizzle_4v( src
, src_swizzle
),
400 swizzle_4v( imm
, mul_swizzle
),
401 swizzle_4v( imm
, add_swizzle
) );
406 swizzle_4v( src
, src_swizzle
),
407 swizzle_4v( imm
, mul_swizzle
) );
412 swizzle_4v( imm
, add_swizzle
) );
425 translate_opcode( unsigned op
)
429 return TGSI_OPCODE_ARL
;
431 return TGSI_OPCODE_ABS
;
433 return TGSI_OPCODE_ADD
;
435 return TGSI_OPCODE_CMP
;
437 return TGSI_OPCODE_COS
;
439 return TGSI_OPCODE_DP3
;
441 return TGSI_OPCODE_DP4
;
443 return TGSI_OPCODE_DPH
;
445 return TGSI_OPCODE_DST
;
447 return TGSI_OPCODE_EX2
;
449 return TGSI_OPCODE_EXP
;
451 return TGSI_OPCODE_FLR
;
453 return TGSI_OPCODE_FRC
;
455 return TGSI_OPCODE_KILL_IF
;
457 return TGSI_OPCODE_LG2
;
459 return TGSI_OPCODE_LOG
;
461 return TGSI_OPCODE_LIT
;
463 return TGSI_OPCODE_LRP
;
465 return TGSI_OPCODE_MAD
;
467 return TGSI_OPCODE_MAX
;
469 return TGSI_OPCODE_MIN
;
471 return TGSI_OPCODE_MOV
;
473 return TGSI_OPCODE_MUL
;
475 return TGSI_OPCODE_POW
;
477 return TGSI_OPCODE_RCP
;
479 return TGSI_OPCODE_SCS
;
481 return TGSI_OPCODE_SGE
;
483 return TGSI_OPCODE_SIN
;
485 return TGSI_OPCODE_SLT
;
487 return TGSI_OPCODE_SUB
;
489 return TGSI_OPCODE_TEX
;
491 return TGSI_OPCODE_TXB
;
493 return TGSI_OPCODE_TXP
;
495 return TGSI_OPCODE_XPD
;
497 return TGSI_OPCODE_END
;
500 return TGSI_OPCODE_NOP
;
507 struct gl_context
*ctx
,
508 struct st_translate
*t
,
509 const struct prog_instruction
*inst
)
511 struct ureg_program
*ureg
= t
->ureg
;
513 struct ureg_dst dst
[1] = { { 0 } };
514 struct ureg_src src
[4];
518 num_dst
= _mesa_num_inst_dst_regs( inst
->Opcode
);
519 num_src
= _mesa_num_inst_src_regs( inst
->Opcode
);
522 dst
[0] = translate_dst( t
,
526 for (i
= 0; i
< num_src
; i
++)
527 src
[i
] = translate_src( t
, &inst
->SrcReg
[i
] );
529 switch( inst
->Opcode
) {
531 emit_swz( t
, dst
[0], &inst
->SrcReg
[0] );
537 src
[num_src
++] = t
->samplers
[inst
->TexSrcUnit
];
539 translate_opcode( inst
->Opcode
),
541 st_translate_texture_target( inst
->TexSrcTarget
,
548 dst
[0] = ureg_writemask(dst
[0], TGSI_WRITEMASK_XY
);
550 translate_opcode( inst
->Opcode
),
556 dst
[0] = ureg_writemask(dst
[0], TGSI_WRITEMASK_XYZ
);
558 translate_opcode( inst
->Opcode
),
564 ureg_RSQ( ureg
, dst
[0], ureg_abs(src
[0]) );
569 translate_opcode( inst
->Opcode
),
578 * Emit the TGSI instructions for inverting and adjusting WPOS.
579 * This code is unavoidable because it also depends on whether
580 * a FBO is bound (STATE_FB_WPOS_Y_TRANSFORM).
583 emit_wpos_adjustment(struct gl_context
*ctx
,
584 struct st_translate
*t
,
585 const struct gl_program
*program
,
587 GLfloat adjX
, GLfloat adjY
[2])
589 struct ureg_program
*ureg
= t
->ureg
;
591 /* Fragment program uses fragment position input.
592 * Need to replace instances of INPUT[WPOS] with temp T
593 * where T = INPUT[WPOS] by y is inverted.
595 static const gl_state_index wposTransformState
[STATE_LENGTH
]
596 = { STATE_INTERNAL
, STATE_FB_WPOS_Y_TRANSFORM
, 0, 0, 0 };
598 /* XXX: note we are modifying the incoming shader here! Need to
599 * do this before emitting the constant decls below, or this
602 unsigned wposTransConst
= _mesa_add_state_reference(program
->Parameters
,
605 struct ureg_src wpostrans
= ureg_DECL_constant( ureg
, wposTransConst
);
606 struct ureg_dst wpos_temp
= ureg_DECL_temporary( ureg
);
607 struct ureg_src
*wpos
=
608 ctx
->Const
.GLSLFragCoordIsSysVal
?
609 &t
->systemValues
[SYSTEM_VALUE_FRAG_COORD
] :
610 &t
->inputs
[t
->inputMapping
[VARYING_SLOT_POS
]];
611 struct ureg_src wpos_input
= *wpos
;
613 /* First, apply the coordinate shift: */
614 if (adjX
|| adjY
[0] || adjY
[1]) {
615 if (adjY
[0] != adjY
[1]) {
616 /* Adjust the y coordinate by adjY[1] or adjY[0] respectively
617 * depending on whether inversion is actually going to be applied
618 * or not, which is determined by testing against the inversion
619 * state variable used below, which will be either +1 or -1.
621 struct ureg_dst adj_temp
= ureg_DECL_temporary(ureg
);
623 ureg_CMP(ureg
, adj_temp
,
624 ureg_scalar(wpostrans
, invert
? 2 : 0),
625 ureg_imm4f(ureg
, adjX
, adjY
[0], 0.0f
, 0.0f
),
626 ureg_imm4f(ureg
, adjX
, adjY
[1], 0.0f
, 0.0f
));
627 ureg_ADD(ureg
, wpos_temp
, wpos_input
, ureg_src(adj_temp
));
629 ureg_ADD(ureg
, wpos_temp
, wpos_input
,
630 ureg_imm4f(ureg
, adjX
, adjY
[0], 0.0f
, 0.0f
));
632 wpos_input
= ureg_src(wpos_temp
);
634 /* MOV wpos_temp, input[wpos]
636 ureg_MOV( ureg
, wpos_temp
, wpos_input
);
639 /* Now the conditional y flip: STATE_FB_WPOS_Y_TRANSFORM.xy/zw will be
640 * inversion/identity, or the other way around if we're drawing to an FBO.
643 /* MAD wpos_temp.y, wpos_input, wpostrans.xxxx, wpostrans.yyyy
646 ureg_writemask(wpos_temp
, TGSI_WRITEMASK_Y
),
648 ureg_scalar(wpostrans
, 0),
649 ureg_scalar(wpostrans
, 1));
651 /* MAD wpos_temp.y, wpos_input, wpostrans.zzzz, wpostrans.wwww
654 ureg_writemask(wpos_temp
, TGSI_WRITEMASK_Y
),
656 ureg_scalar(wpostrans
, 2),
657 ureg_scalar(wpostrans
, 3));
660 /* Use wpos_temp as position input from here on:
662 *wpos
= ureg_src(wpos_temp
);
667 * Emit fragment position/coordinate code.
670 emit_wpos(struct st_context
*st
,
671 struct st_translate
*t
,
672 const struct gl_program
*program
,
673 struct ureg_program
*ureg
)
675 struct pipe_screen
*pscreen
= st
->pipe
->screen
;
677 GLfloat adjY
[2] = { 0.0f
, 0.0f
};
678 boolean invert
= FALSE
;
680 /* Query the pixel center conventions supported by the pipe driver and set
681 * adjX, adjY to help out if it cannot handle the requested one internally.
683 * The bias of the y-coordinate depends on whether y-inversion takes place
684 * (adjY[1]) or not (adjY[0]), which is in turn dependent on whether we are
685 * drawing to an FBO (causes additional inversion), and whether the pipe
686 * driver origin and the requested origin differ (the latter condition is
687 * stored in the 'invert' variable).
689 * For height = 100 (i = integer, h = half-integer, l = lower, u = upper):
696 * l,i -> u,i: ( 0.0 + 1.0) * -1 + 100 = 99
697 * l,h -> u,h: ( 0.5 + 0.0) * -1 + 100 = 99.5
698 * u,i -> l,i: (99.0 + 1.0) * -1 + 100 = 0
699 * u,h -> l,h: (99.5 + 0.0) * -1 + 100 = 0.5
701 * inversion and center shift:
702 * l,i -> u,h: ( 0.0 + 0.5) * -1 + 100 = 99.5
703 * l,h -> u,i: ( 0.5 + 0.5) * -1 + 100 = 99
704 * u,i -> l,h: (99.0 + 0.5) * -1 + 100 = 0.5
705 * u,h -> l,i: (99.5 + 0.5) * -1 + 100 = 0
707 if (program
->OriginUpperLeft
) {
708 /* Fragment shader wants origin in upper-left */
709 if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT
)) {
710 /* the driver supports upper-left origin */
712 else if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT
)) {
713 /* the driver supports lower-left origin, need to invert Y */
714 ureg_property(ureg
, TGSI_PROPERTY_FS_COORD_ORIGIN
,
715 TGSI_FS_COORD_ORIGIN_LOWER_LEFT
);
722 /* Fragment shader wants origin in lower-left */
723 if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT
))
724 /* the driver supports lower-left origin */
725 ureg_property(ureg
, TGSI_PROPERTY_FS_COORD_ORIGIN
,
726 TGSI_FS_COORD_ORIGIN_LOWER_LEFT
);
727 else if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT
))
728 /* the driver supports upper-left origin, need to invert Y */
734 if (program
->PixelCenterInteger
) {
735 /* Fragment shader wants pixel center integer */
736 if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER
)) {
737 /* the driver supports pixel center integer */
739 ureg_property(ureg
, TGSI_PROPERTY_FS_COORD_PIXEL_CENTER
,
740 TGSI_FS_COORD_PIXEL_CENTER_INTEGER
);
742 else if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER
)) {
743 /* the driver supports pixel center half integer, need to bias X,Y */
752 /* Fragment shader wants pixel center half integer */
753 if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER
)) {
754 /* the driver supports pixel center half integer */
756 else if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER
)) {
757 /* the driver supports pixel center integer, need to bias X,Y */
758 adjX
= adjY
[0] = adjY
[1] = 0.5f
;
759 ureg_property(ureg
, TGSI_PROPERTY_FS_COORD_PIXEL_CENTER
,
760 TGSI_FS_COORD_PIXEL_CENTER_INTEGER
);
766 /* we invert after adjustment so that we avoid the MOV to temporary,
767 * and reuse the adjustment ADD instead */
768 emit_wpos_adjustment(st
->ctx
, t
, program
, invert
, adjX
, adjY
);
773 * Translate Mesa program to TGSI format.
774 * \param program the program to translate
775 * \param numInputs number of input registers used
776 * \param inputMapping maps Mesa fragment program inputs to TGSI generic
778 * \param inputSemanticName the TGSI_SEMANTIC flag for each input
779 * \param inputSemanticIndex the semantic index (ex: which texcoord) for
781 * \param interpMode the TGSI_INTERPOLATE_LINEAR/PERSP mode for each input
782 * \param numOutputs number of output registers used
783 * \param outputMapping maps Mesa fragment program outputs to TGSI
785 * \param outputSemanticName the TGSI_SEMANTIC flag for each output
786 * \param outputSemanticIndex the semantic index (ex: which texcoord) for
789 * \return PIPE_OK or PIPE_ERROR_OUT_OF_MEMORY
792 st_translate_mesa_program(
793 struct gl_context
*ctx
,
795 struct ureg_program
*ureg
,
796 const struct gl_program
*program
,
798 const GLuint inputMapping
[],
799 const ubyte inputSemanticName
[],
800 const ubyte inputSemanticIndex
[],
801 const GLuint interpMode
[],
803 const GLuint outputMapping
[],
804 const ubyte outputSemanticName
[],
805 const ubyte outputSemanticIndex
[])
807 struct st_translate translate
, *t
;
809 enum pipe_error ret
= PIPE_OK
;
811 assert(numInputs
<= ARRAY_SIZE(t
->inputs
));
812 assert(numOutputs
<= ARRAY_SIZE(t
->outputs
));
815 memset(t
, 0, sizeof *t
);
817 t
->procType
= procType
;
818 t
->inputMapping
= inputMapping
;
819 t
->outputMapping
= outputMapping
;
822 /*_mesa_print_program(program);*/
825 * Declare input attributes.
827 if (procType
== PIPE_SHADER_FRAGMENT
) {
828 for (i
= 0; i
< numInputs
; i
++) {
829 t
->inputs
[i
] = ureg_DECL_fs_input(ureg
,
830 inputSemanticName
[i
],
831 inputSemanticIndex
[i
],
835 if (program
->info
.inputs_read
& VARYING_BIT_POS
) {
836 /* Must do this after setting up t->inputs, and before
837 * emitting constant references, below:
839 emit_wpos(st_context(ctx
), t
, program
, ureg
);
843 * Declare output attributes.
845 for (i
= 0; i
< numOutputs
; i
++) {
846 switch (outputSemanticName
[i
]) {
847 case TGSI_SEMANTIC_POSITION
:
848 t
->outputs
[i
] = ureg_DECL_output( ureg
,
849 TGSI_SEMANTIC_POSITION
, /* Z / Depth */
850 outputSemanticIndex
[i
] );
852 t
->outputs
[i
] = ureg_writemask( t
->outputs
[i
],
855 case TGSI_SEMANTIC_STENCIL
:
856 t
->outputs
[i
] = ureg_DECL_output( ureg
,
857 TGSI_SEMANTIC_STENCIL
, /* Stencil */
858 outputSemanticIndex
[i
] );
859 t
->outputs
[i
] = ureg_writemask( t
->outputs
[i
],
862 case TGSI_SEMANTIC_COLOR
:
863 t
->outputs
[i
] = ureg_DECL_output( ureg
,
865 outputSemanticIndex
[i
] );
873 else if (procType
== PIPE_SHADER_GEOMETRY
) {
874 for (i
= 0; i
< numInputs
; i
++) {
875 t
->inputs
[i
] = ureg_DECL_input(ureg
,
876 inputSemanticName
[i
],
877 inputSemanticIndex
[i
], 0, 1);
880 for (i
= 0; i
< numOutputs
; i
++) {
881 t
->outputs
[i
] = ureg_DECL_output( ureg
,
882 outputSemanticName
[i
],
883 outputSemanticIndex
[i
] );
887 assert(procType
== PIPE_SHADER_VERTEX
);
889 for (i
= 0; i
< numInputs
; i
++) {
890 t
->inputs
[i
] = ureg_DECL_vs_input(ureg
, i
);
893 for (i
= 0; i
< numOutputs
; i
++) {
894 t
->outputs
[i
] = ureg_DECL_output( ureg
,
895 outputSemanticName
[i
],
896 outputSemanticIndex
[i
] );
897 if (outputSemanticName
[i
] == TGSI_SEMANTIC_FOG
) {
898 /* force register to contain a fog coordinate in the form (F, 0, 0, 1). */
900 ureg_writemask(t
->outputs
[i
], TGSI_WRITEMASK_YZW
),
901 ureg_imm4f(ureg
, 0.0f
, 0.0f
, 0.0f
, 1.0f
));
902 t
->outputs
[i
] = ureg_writemask(t
->outputs
[i
], TGSI_WRITEMASK_X
);
907 /* Declare address register.
909 if (program
->NumAddressRegs
> 0) {
910 debug_assert( program
->NumAddressRegs
== 1 );
911 t
->address
[0] = ureg_DECL_address( ureg
);
914 /* Declare misc input registers
917 GLbitfield sysInputs
= program
->SystemValuesRead
;
919 for (i
= 0; sysInputs
; i
++) {
920 if (sysInputs
& (1 << i
)) {
921 unsigned semName
= _mesa_sysval_to_semantic(i
);
923 t
->systemValues
[i
] = ureg_DECL_system_value(ureg
, semName
, 0);
925 if (semName
== TGSI_SEMANTIC_INSTANCEID
||
926 semName
== TGSI_SEMANTIC_VERTEXID
) {
927 /* From Gallium perspective, these system values are always
928 * integer, and require native integer support. However, if
929 * native integer is supported on the vertex stage but not the
930 * pixel stage (e.g, i915g + draw), Mesa will generate IR that
931 * assumes these system values are floats. To resolve the
932 * inconsistency, we insert a U2F.
934 struct st_context
*st
= st_context(ctx
);
935 struct pipe_screen
*pscreen
= st
->pipe
->screen
;
936 assert(procType
== PIPE_SHADER_VERTEX
);
937 assert(pscreen
->get_shader_param(pscreen
, PIPE_SHADER_VERTEX
, PIPE_SHADER_CAP_INTEGERS
));
938 (void) pscreen
; /* silence non-debug build warnings */
939 if (!ctx
->Const
.NativeIntegers
) {
940 struct ureg_dst temp
= ureg_DECL_local_temporary(t
->ureg
);
941 ureg_U2F( t
->ureg
, ureg_writemask(temp
, TGSI_WRITEMASK_X
), t
->systemValues
[i
]);
942 t
->systemValues
[i
] = ureg_scalar(ureg_src(temp
), 0);
946 if (procType
== PIPE_SHADER_FRAGMENT
&&
947 semName
== TGSI_SEMANTIC_POSITION
)
948 emit_wpos(st_context(ctx
), t
, program
, ureg
);
950 sysInputs
&= ~(1 << i
);
955 if (program
->IndirectRegisterFiles
& (1 << PROGRAM_TEMPORARY
)) {
956 /* If temps are accessed with indirect addressing, declare temporaries
957 * in sequential order. Else, we declare them on demand elsewhere.
959 for (i
= 0; i
< program
->NumTemporaries
; i
++) {
960 /* XXX use TGSI_FILE_TEMPORARY_ARRAY when it's supported by ureg */
961 t
->temps
[i
] = ureg_DECL_temporary( t
->ureg
);
965 /* Emit constants and immediates. Mesa uses a single index space
966 * for these, so we put all the translated regs in t->constants.
968 if (program
->Parameters
) {
969 t
->constants
= calloc( program
->Parameters
->NumParameters
,
970 sizeof t
->constants
[0] );
971 if (t
->constants
== NULL
) {
972 ret
= PIPE_ERROR_OUT_OF_MEMORY
;
976 for (i
= 0; i
< program
->Parameters
->NumParameters
; i
++) {
977 switch (program
->Parameters
->Parameters
[i
].Type
) {
978 case PROGRAM_STATE_VAR
:
979 case PROGRAM_UNIFORM
:
980 t
->constants
[i
] = ureg_DECL_constant( ureg
, i
);
983 /* Emit immediates only when there's no indirect addressing of
985 * FIXME: Be smarter and recognize param arrays:
986 * indirect addressing is only valid within the referenced
989 case PROGRAM_CONSTANT
:
990 if (program
->IndirectRegisterFiles
& PROGRAM_ANY_CONST
)
991 t
->constants
[i
] = ureg_DECL_constant( ureg
, i
);
994 ureg_DECL_immediate( ureg
,
995 (const float*) program
->Parameters
->ParameterValues
[i
],
1004 /* texture samplers */
1005 for (i
= 0; i
< ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
; i
++) {
1006 if (program
->SamplersUsed
& (1u << i
)) {
1008 translate_texture_index(program
->TexturesUsed
[i
],
1009 !!(program
->ShadowSamplers
& (1 << i
)));
1010 t
->samplers
[i
] = ureg_DECL_sampler( ureg
, i
);
1011 ureg_DECL_sampler_view(ureg
, i
, target
,
1012 TGSI_RETURN_TYPE_FLOAT
,
1013 TGSI_RETURN_TYPE_FLOAT
,
1014 TGSI_RETURN_TYPE_FLOAT
,
1015 TGSI_RETURN_TYPE_FLOAT
);
1020 /* Emit each instruction in turn:
1022 for (i
= 0; i
< program
->NumInstructions
; i
++)
1023 compile_instruction(ctx
, t
, &program
->Instructions
[i
]);