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 "tgsi/tgsi_from_mesa.h"
41 #include "st_mesa_to_tgsi.h"
42 #include "st_context.h"
43 #include "program/prog_instruction.h"
44 #include "program/prog_parameter.h"
45 #include "util/u_debug.h"
46 #include "util/u_math.h"
47 #include "util/u_memory.h"
48 #include "st_glsl_to_tgsi.h" /* for _mesa_sysval_to_semantic */
51 #define PROGRAM_ANY_CONST ((1 << PROGRAM_STATE_VAR) | \
52 (1 << PROGRAM_CONSTANT) | \
53 (1 << PROGRAM_UNIFORM))
56 * Intermediate state used during shader translation.
59 struct ureg_program
*ureg
;
61 struct ureg_dst temps
[MAX_PROGRAM_TEMPS
];
62 struct ureg_src
*constants
;
63 struct ureg_dst outputs
[PIPE_MAX_SHADER_OUTPUTS
];
64 struct ureg_src inputs
[PIPE_MAX_SHADER_INPUTS
];
65 struct ureg_dst address
[1];
66 struct ureg_src samplers
[PIPE_MAX_SAMPLERS
];
67 struct ureg_src systemValues
[SYSTEM_VALUE_MAX
];
69 const ubyte
*inputMapping
;
70 const ubyte
*outputMapping
;
72 unsigned procType
; /**< PIPE_SHADER_VERTEX/FRAGMENT */
77 * Map a Mesa dst register to a TGSI ureg_dst register.
79 static struct ureg_dst
80 dst_register(struct st_translate
*t
, gl_register_file file
, GLuint index
)
83 case PROGRAM_UNDEFINED
:
84 return ureg_dst_undef();
86 case PROGRAM_TEMPORARY
:
87 if (ureg_dst_is_undef(t
->temps
[index
]))
88 t
->temps
[index
] = ureg_DECL_temporary(t
->ureg
);
90 return t
->temps
[index
];
93 if (t
->procType
== PIPE_SHADER_VERTEX
)
94 assert(index
< VARYING_SLOT_MAX
);
95 else if (t
->procType
== PIPE_SHADER_FRAGMENT
)
96 assert(index
< FRAG_RESULT_MAX
);
98 assert(index
< VARYING_SLOT_MAX
);
100 assert(t
->outputMapping
[index
] < ARRAY_SIZE(t
->outputs
));
102 return t
->outputs
[t
->outputMapping
[index
]];
104 case PROGRAM_ADDRESS
:
105 return t
->address
[index
];
109 return ureg_dst_undef();
115 * Map a Mesa src register to a TGSI ureg_src register.
117 static struct ureg_src
118 src_register(struct st_translate
*t
,
119 gl_register_file file
,
123 case PROGRAM_UNDEFINED
:
124 return ureg_src_undef();
126 case PROGRAM_TEMPORARY
:
128 assert(index
< ARRAY_SIZE(t
->temps
));
129 if (ureg_dst_is_undef(t
->temps
[index
]))
130 t
->temps
[index
] = ureg_DECL_temporary(t
->ureg
);
131 return ureg_src(t
->temps
[index
]);
133 case PROGRAM_UNIFORM
:
135 return t
->constants
[index
];
136 case PROGRAM_STATE_VAR
:
137 case PROGRAM_CONSTANT
: /* ie, immediate */
139 return ureg_DECL_constant(t
->ureg
, 0);
141 return t
->constants
[index
];
144 if (t
->inputMapping
[index
] < ARRAY_SIZE(t
->inputs
))
145 return t
->inputs
[t
->inputMapping
[index
]];
147 assert(t
->procType
== PIPE_SHADER_VERTEX
);
148 return ureg_DECL_constant(t
->ureg
, 0);
152 assert(t
->outputMapping
[index
] < ARRAY_SIZE(t
->outputs
));
153 return ureg_src(t
->outputs
[t
->outputMapping
[index
]]); /* not needed? */
155 case PROGRAM_ADDRESS
:
156 return ureg_src(t
->address
[index
]);
158 case PROGRAM_SYSTEM_VALUE
:
159 assert(index
< ARRAY_SIZE(t
->systemValues
));
160 return t
->systemValues
[index
];
164 return ureg_src_undef();
170 * Map mesa texture target to TGSI texture target.
172 enum tgsi_texture_type
173 st_translate_texture_target(gl_texture_index textarget
, GLboolean shadow
)
177 case TEXTURE_1D_INDEX
:
178 return TGSI_TEXTURE_SHADOW1D
;
179 case TEXTURE_2D_INDEX
:
180 return TGSI_TEXTURE_SHADOW2D
;
181 case TEXTURE_RECT_INDEX
:
182 return TGSI_TEXTURE_SHADOWRECT
;
183 case TEXTURE_1D_ARRAY_INDEX
:
184 return TGSI_TEXTURE_SHADOW1D_ARRAY
;
185 case TEXTURE_2D_ARRAY_INDEX
:
186 return TGSI_TEXTURE_SHADOW2D_ARRAY
;
187 case TEXTURE_CUBE_INDEX
:
188 return TGSI_TEXTURE_SHADOWCUBE
;
189 case TEXTURE_CUBE_ARRAY_INDEX
:
190 return TGSI_TEXTURE_SHADOWCUBE_ARRAY
;
197 case TEXTURE_2D_MULTISAMPLE_INDEX
:
198 return TGSI_TEXTURE_2D_MSAA
;
199 case TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX
:
200 return TGSI_TEXTURE_2D_ARRAY_MSAA
;
201 case TEXTURE_BUFFER_INDEX
:
202 return TGSI_TEXTURE_BUFFER
;
203 case TEXTURE_1D_INDEX
:
204 return TGSI_TEXTURE_1D
;
205 case TEXTURE_2D_INDEX
:
206 return TGSI_TEXTURE_2D
;
207 case TEXTURE_3D_INDEX
:
208 return TGSI_TEXTURE_3D
;
209 case TEXTURE_CUBE_INDEX
:
210 return TGSI_TEXTURE_CUBE
;
211 case TEXTURE_CUBE_ARRAY_INDEX
:
212 return TGSI_TEXTURE_CUBE_ARRAY
;
213 case TEXTURE_RECT_INDEX
:
214 return TGSI_TEXTURE_RECT
;
215 case TEXTURE_1D_ARRAY_INDEX
:
216 return TGSI_TEXTURE_1D_ARRAY
;
217 case TEXTURE_2D_ARRAY_INDEX
:
218 return TGSI_TEXTURE_2D_ARRAY
;
219 case TEXTURE_EXTERNAL_INDEX
:
220 return TGSI_TEXTURE_2D
;
222 debug_assert(!"unexpected texture target index");
223 return TGSI_TEXTURE_1D
;
229 * Map GLSL base type to TGSI return type.
231 enum tgsi_return_type
232 st_translate_texture_type(enum glsl_base_type type
)
236 return TGSI_RETURN_TYPE_SINT
;
238 return TGSI_RETURN_TYPE_UINT
;
239 case GLSL_TYPE_FLOAT
:
240 return TGSI_RETURN_TYPE_FLOAT
;
242 assert(!"unexpected texture type");
243 return TGSI_RETURN_TYPE_UNKNOWN
;
249 * Translate a (1 << TEXTURE_x_INDEX) bit into a TGSI_TEXTURE_x enum.
252 translate_texture_index(GLbitfield texBit
, bool shadow
)
254 int index
= ffs(texBit
);
256 assert(index
- 1 < NUM_TEXTURE_TARGETS
);
257 return st_translate_texture_target(index
- 1, shadow
);
262 * Create a TGSI ureg_dst register from a Mesa dest register.
264 static struct ureg_dst
265 translate_dst(struct st_translate
*t
,
266 const struct prog_dst_register
*DstReg
,
269 struct ureg_dst dst
= dst_register(t
, DstReg
->File
, DstReg
->Index
);
271 dst
= ureg_writemask(dst
, DstReg
->WriteMask
);
274 dst
= ureg_saturate(dst
);
277 dst
= ureg_dst_indirect(dst
, ureg_src(t
->address
[0]));
284 * Create a TGSI ureg_src register from a Mesa src register.
286 static struct ureg_src
287 translate_src(struct st_translate
*t
,
288 const struct prog_src_register
*SrcReg
)
290 struct ureg_src src
= src_register(t
, SrcReg
->File
, SrcReg
->Index
);
292 src
= ureg_swizzle(src
,
293 GET_SWZ(SrcReg
->Swizzle
, 0) & 0x3,
294 GET_SWZ(SrcReg
->Swizzle
, 1) & 0x3,
295 GET_SWZ(SrcReg
->Swizzle
, 2) & 0x3,
296 GET_SWZ(SrcReg
->Swizzle
, 3) & 0x3);
298 if (SrcReg
->Negate
== NEGATE_XYZW
)
299 src
= ureg_negate(src
);
301 if (SrcReg
->RelAddr
) {
302 src
= ureg_src_indirect(src
, ureg_src(t
->address
[0]));
303 if (SrcReg
->File
!= PROGRAM_INPUT
&&
304 SrcReg
->File
!= PROGRAM_OUTPUT
) {
305 /* If SrcReg->Index was negative, it was set to zero in
306 * src_register(). Reassign it now. But don't do this
307 * for input/output regs since they get remapped while
308 * const buffers don't.
310 src
.Index
= SrcReg
->Index
;
318 static struct ureg_src
319 swizzle_4v(struct ureg_src src
, const unsigned *swz
)
321 return ureg_swizzle(src
, swz
[0], swz
[1], swz
[2], swz
[3]);
326 * Translate a SWZ instruction into a MOV, MUL or MAD instruction. EG:
332 * MAD dst {1,-1,0,0}, src.xyxx, {0,0,1,0}
335 emit_swz(struct st_translate
*t
,
337 const struct prog_src_register
*SrcReg
)
339 struct ureg_program
*ureg
= t
->ureg
;
340 struct ureg_src src
= src_register(t
, SrcReg
->File
, SrcReg
->Index
);
342 unsigned negate_mask
= SrcReg
->Negate
;
344 unsigned one_mask
= ((GET_SWZ(SrcReg
->Swizzle
, 0) == SWIZZLE_ONE
) << 0 |
345 (GET_SWZ(SrcReg
->Swizzle
, 1) == SWIZZLE_ONE
) << 1 |
346 (GET_SWZ(SrcReg
->Swizzle
, 2) == SWIZZLE_ONE
) << 2 |
347 (GET_SWZ(SrcReg
->Swizzle
, 3) == SWIZZLE_ONE
) << 3);
349 unsigned zero_mask
= ((GET_SWZ(SrcReg
->Swizzle
, 0) == SWIZZLE_ZERO
) << 0 |
350 (GET_SWZ(SrcReg
->Swizzle
, 1) == SWIZZLE_ZERO
) << 1 |
351 (GET_SWZ(SrcReg
->Swizzle
, 2) == SWIZZLE_ZERO
) << 2 |
352 (GET_SWZ(SrcReg
->Swizzle
, 3) == SWIZZLE_ZERO
) << 3);
354 unsigned negative_one_mask
= one_mask
& negate_mask
;
355 unsigned positive_one_mask
= one_mask
& ~negate_mask
;
359 unsigned mul_swizzle
[4] = {0,0,0,0};
360 unsigned add_swizzle
[4] = {0,0,0,0};
361 unsigned src_swizzle
[4] = {0,0,0,0};
362 boolean need_add
= FALSE
;
363 boolean need_mul
= FALSE
;
365 if (dst
.WriteMask
== 0)
368 /* Is this just a MOV?
370 if (zero_mask
== 0 &&
372 (negate_mask
== 0 || negate_mask
== TGSI_WRITEMASK_XYZW
)) {
373 ureg_MOV(ureg
, dst
, translate_src(t
, SrcReg
));
379 #define IMM_NEG_ONE 2
381 imm
= ureg_imm3f(ureg
, 0, 1, -1);
383 for (i
= 0; i
< 4; i
++) {
384 unsigned bit
= 1 << i
;
386 if (dst
.WriteMask
& bit
) {
387 if (positive_one_mask
& bit
) {
388 mul_swizzle
[i
] = IMM_ZERO
;
389 add_swizzle
[i
] = IMM_ONE
;
392 else if (negative_one_mask
& bit
) {
393 mul_swizzle
[i
] = IMM_ZERO
;
394 add_swizzle
[i
] = IMM_NEG_ONE
;
397 else if (zero_mask
& bit
) {
398 mul_swizzle
[i
] = IMM_ZERO
;
399 add_swizzle
[i
] = IMM_ZERO
;
403 add_swizzle
[i
] = IMM_ZERO
;
404 src_swizzle
[i
] = GET_SWZ(SrcReg
->Swizzle
, i
);
406 if (negate_mask
& bit
) {
407 mul_swizzle
[i
] = IMM_NEG_ONE
;
410 mul_swizzle
[i
] = IMM_ONE
;
416 if (need_mul
&& need_add
) {
419 swizzle_4v(src
, src_swizzle
),
420 swizzle_4v(imm
, mul_swizzle
),
421 swizzle_4v(imm
, add_swizzle
));
426 swizzle_4v(src
, src_swizzle
),
427 swizzle_4v(imm
, mul_swizzle
));
432 swizzle_4v(imm
, add_swizzle
));
445 translate_opcode(unsigned op
)
449 return TGSI_OPCODE_ARL
;
451 return TGSI_OPCODE_ADD
;
453 return TGSI_OPCODE_CMP
;
455 return TGSI_OPCODE_COS
;
457 return TGSI_OPCODE_DP3
;
459 return TGSI_OPCODE_DP4
;
461 return TGSI_OPCODE_DST
;
463 return TGSI_OPCODE_EX2
;
465 return TGSI_OPCODE_EXP
;
467 return TGSI_OPCODE_FLR
;
469 return TGSI_OPCODE_FRC
;
471 return TGSI_OPCODE_KILL_IF
;
473 return TGSI_OPCODE_LG2
;
475 return TGSI_OPCODE_LOG
;
477 return TGSI_OPCODE_LIT
;
479 return TGSI_OPCODE_LRP
;
481 return TGSI_OPCODE_MAD
;
483 return TGSI_OPCODE_MAX
;
485 return TGSI_OPCODE_MIN
;
487 return TGSI_OPCODE_MOV
;
489 return TGSI_OPCODE_MUL
;
491 return TGSI_OPCODE_POW
;
493 return TGSI_OPCODE_RCP
;
495 return TGSI_OPCODE_SGE
;
497 return TGSI_OPCODE_SIN
;
499 return TGSI_OPCODE_SLT
;
501 return TGSI_OPCODE_TEX
;
503 return TGSI_OPCODE_TXB
;
505 return TGSI_OPCODE_TXP
;
507 return TGSI_OPCODE_END
;
510 return TGSI_OPCODE_NOP
;
516 compile_instruction(struct gl_context
*ctx
,
517 struct st_translate
*t
,
518 const struct prog_instruction
*inst
)
520 struct ureg_program
*ureg
= t
->ureg
;
522 struct ureg_dst dst
[1] = { { 0 } };
523 struct ureg_src src
[4];
527 num_dst
= _mesa_num_inst_dst_regs(inst
->Opcode
);
528 num_src
= _mesa_num_inst_src_regs(inst
->Opcode
);
531 dst
[0] = translate_dst(t
, &inst
->DstReg
, inst
->Saturate
);
533 for (i
= 0; i
< num_src
; i
++)
534 src
[i
] = translate_src(t
, &inst
->SrcReg
[i
]);
536 switch(inst
->Opcode
) {
538 emit_swz(t
, dst
[0], &inst
->SrcReg
[0]);
544 src
[num_src
++] = t
->samplers
[inst
->TexSrcUnit
];
546 translate_opcode(inst
->Opcode
),
548 st_translate_texture_target(inst
->TexSrcTarget
,
550 TGSI_RETURN_TYPE_FLOAT
,
556 ureg_COS(ureg
, ureg_writemask(dst
[0], TGSI_WRITEMASK_X
),
557 ureg_scalar(src
[0], TGSI_SWIZZLE_X
));
558 ureg_SIN(ureg
, ureg_writemask(dst
[0], TGSI_WRITEMASK_Y
),
559 ureg_scalar(src
[0], TGSI_SWIZZLE_X
));
563 struct ureg_dst tmp
= ureg_DECL_temporary(ureg
);
565 ureg_MUL(ureg
, ureg_writemask(tmp
, TGSI_WRITEMASK_XYZ
),
566 ureg_swizzle(src
[0], TGSI_SWIZZLE_Y
, TGSI_SWIZZLE_Z
,
568 ureg_swizzle(src
[1], TGSI_SWIZZLE_Z
, TGSI_SWIZZLE_X
,
570 ureg_MAD(ureg
, ureg_writemask(dst
[0], TGSI_WRITEMASK_XYZ
),
571 ureg_swizzle(src
[0], TGSI_SWIZZLE_Z
, TGSI_SWIZZLE_X
,
573 ureg_negate(ureg_swizzle(src
[1], TGSI_SWIZZLE_Y
,
574 TGSI_SWIZZLE_Z
, TGSI_SWIZZLE_X
, 0)),
580 ureg_RSQ(ureg
, dst
[0], ureg_abs(src
[0]));
584 ureg_MOV(ureg
, dst
[0], ureg_abs(src
[0]));
588 ureg_ADD(ureg
, dst
[0], src
[0], ureg_negate(src
[1]));
592 struct ureg_dst temp
= ureg_DECL_temporary(ureg
);
594 /* DPH = DP4(src0, src1) where src0.w = 1. */
595 ureg_MOV(ureg
, ureg_writemask(temp
, TGSI_WRITEMASK_XYZ
), src
[0]);
596 ureg_MOV(ureg
, ureg_writemask(temp
, TGSI_WRITEMASK_W
),
597 ureg_imm1f(ureg
, 1));
598 ureg_DP4(ureg
, dst
[0], ureg_src(temp
), src
[1]);
604 translate_opcode(inst
->Opcode
),
613 * Emit the TGSI instructions for inverting and adjusting WPOS.
614 * This code is unavoidable because it also depends on whether
615 * a FBO is bound (STATE_FB_WPOS_Y_TRANSFORM).
618 emit_wpos_adjustment(struct gl_context
*ctx
,
619 struct st_translate
*t
,
620 const struct gl_program
*program
,
622 GLfloat adjX
, GLfloat adjY
[2])
624 struct ureg_program
*ureg
= t
->ureg
;
626 /* Fragment program uses fragment position input.
627 * Need to replace instances of INPUT[WPOS] with temp T
628 * where T = INPUT[WPOS] by y is inverted.
630 static const gl_state_index16 wposTransformState
[STATE_LENGTH
]
631 = { STATE_INTERNAL
, STATE_FB_WPOS_Y_TRANSFORM
, 0, 0, 0 };
633 /* XXX: note we are modifying the incoming shader here! Need to
634 * do this before emitting the constant decls below, or this
637 unsigned wposTransConst
= _mesa_add_state_reference(program
->Parameters
,
640 struct ureg_src wpostrans
= ureg_DECL_constant(ureg
, wposTransConst
);
641 struct ureg_dst wpos_temp
= ureg_DECL_temporary(ureg
);
642 struct ureg_src
*wpos
=
643 ctx
->Const
.GLSLFragCoordIsSysVal
?
644 &t
->systemValues
[SYSTEM_VALUE_FRAG_COORD
] :
645 &t
->inputs
[t
->inputMapping
[VARYING_SLOT_POS
]];
646 struct ureg_src wpos_input
= *wpos
;
648 /* First, apply the coordinate shift: */
649 if (adjX
|| adjY
[0] || adjY
[1]) {
650 if (adjY
[0] != adjY
[1]) {
651 /* Adjust the y coordinate by adjY[1] or adjY[0] respectively
652 * depending on whether inversion is actually going to be applied
653 * or not, which is determined by testing against the inversion
654 * state variable used below, which will be either +1 or -1.
656 struct ureg_dst adj_temp
= ureg_DECL_temporary(ureg
);
658 ureg_CMP(ureg
, adj_temp
,
659 ureg_scalar(wpostrans
, invert
? 2 : 0),
660 ureg_imm4f(ureg
, adjX
, adjY
[0], 0.0f
, 0.0f
),
661 ureg_imm4f(ureg
, adjX
, adjY
[1], 0.0f
, 0.0f
));
662 ureg_ADD(ureg
, wpos_temp
, wpos_input
, ureg_src(adj_temp
));
664 ureg_ADD(ureg
, wpos_temp
, wpos_input
,
665 ureg_imm4f(ureg
, adjX
, adjY
[0], 0.0f
, 0.0f
));
667 wpos_input
= ureg_src(wpos_temp
);
669 /* MOV wpos_temp, input[wpos]
671 ureg_MOV(ureg
, wpos_temp
, wpos_input
);
674 /* Now the conditional y flip: STATE_FB_WPOS_Y_TRANSFORM.xy/zw will be
675 * inversion/identity, or the other way around if we're drawing to an FBO.
678 /* MAD wpos_temp.y, wpos_input, wpostrans.xxxx, wpostrans.yyyy
681 ureg_writemask(wpos_temp
, TGSI_WRITEMASK_Y
),
683 ureg_scalar(wpostrans
, 0),
684 ureg_scalar(wpostrans
, 1));
686 /* MAD wpos_temp.y, wpos_input, wpostrans.zzzz, wpostrans.wwww
689 ureg_writemask(wpos_temp
, TGSI_WRITEMASK_Y
),
691 ureg_scalar(wpostrans
, 2),
692 ureg_scalar(wpostrans
, 3));
695 /* Use wpos_temp as position input from here on:
697 *wpos
= ureg_src(wpos_temp
);
702 * Emit fragment position/coordinate code.
705 emit_wpos(struct st_context
*st
,
706 struct st_translate
*t
,
707 const struct gl_program
*program
,
708 struct ureg_program
*ureg
)
710 struct pipe_screen
*pscreen
= st
->pipe
->screen
;
712 GLfloat adjY
[2] = { 0.0f
, 0.0f
};
713 boolean invert
= FALSE
;
715 /* Query the pixel center conventions supported by the pipe driver and set
716 * adjX, adjY to help out if it cannot handle the requested one internally.
718 * The bias of the y-coordinate depends on whether y-inversion takes place
719 * (adjY[1]) or not (adjY[0]), which is in turn dependent on whether we are
720 * drawing to an FBO (causes additional inversion), and whether the pipe
721 * driver origin and the requested origin differ (the latter condition is
722 * stored in the 'invert' variable).
724 * For height = 100 (i = integer, h = half-integer, l = lower, u = upper):
731 * l,i -> u,i: ( 0.0 + 1.0) * -1 + 100 = 99
732 * l,h -> u,h: ( 0.5 + 0.0) * -1 + 100 = 99.5
733 * u,i -> l,i: (99.0 + 1.0) * -1 + 100 = 0
734 * u,h -> l,h: (99.5 + 0.0) * -1 + 100 = 0.5
736 * inversion and center shift:
737 * l,i -> u,h: ( 0.0 + 0.5) * -1 + 100 = 99.5
738 * l,h -> u,i: ( 0.5 + 0.5) * -1 + 100 = 99
739 * u,i -> l,h: (99.0 + 0.5) * -1 + 100 = 0.5
740 * u,h -> l,i: (99.5 + 0.5) * -1 + 100 = 0
742 if (program
->info
.fs
.origin_upper_left
) {
743 /* Fragment shader wants origin in upper-left */
744 if (pscreen
->get_param(pscreen
,
745 PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT
)) {
746 /* the driver supports upper-left origin */
748 else if (pscreen
->get_param(pscreen
,
749 PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT
)) {
750 /* the driver supports lower-left origin, need to invert Y */
751 ureg_property(ureg
, TGSI_PROPERTY_FS_COORD_ORIGIN
,
752 TGSI_FS_COORD_ORIGIN_LOWER_LEFT
);
759 /* Fragment shader wants origin in lower-left */
760 if (pscreen
->get_param(pscreen
, PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT
))
761 /* the driver supports lower-left origin */
762 ureg_property(ureg
, TGSI_PROPERTY_FS_COORD_ORIGIN
,
763 TGSI_FS_COORD_ORIGIN_LOWER_LEFT
);
764 else if (pscreen
->get_param(pscreen
,
765 PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT
))
766 /* the driver supports upper-left origin, need to invert Y */
772 if (program
->info
.fs
.pixel_center_integer
) {
773 /* Fragment shader wants pixel center integer */
774 if (pscreen
->get_param(pscreen
,
775 PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER
)) {
776 /* the driver supports pixel center integer */
778 ureg_property(ureg
, TGSI_PROPERTY_FS_COORD_PIXEL_CENTER
,
779 TGSI_FS_COORD_PIXEL_CENTER_INTEGER
);
781 else if (pscreen
->get_param(pscreen
,
782 PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER
)) {
783 /* the driver supports pixel center half integer, need to bias X,Y */
792 /* Fragment shader wants pixel center half integer */
793 if (pscreen
->get_param(pscreen
,
794 PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER
)) {
795 /* the driver supports pixel center half integer */
797 else if (pscreen
->get_param(pscreen
,
798 PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER
)) {
799 /* the driver supports pixel center integer, need to bias X,Y */
800 adjX
= adjY
[0] = adjY
[1] = 0.5f
;
801 ureg_property(ureg
, TGSI_PROPERTY_FS_COORD_PIXEL_CENTER
,
802 TGSI_FS_COORD_PIXEL_CENTER_INTEGER
);
808 /* we invert after adjustment so that we avoid the MOV to temporary,
809 * and reuse the adjustment ADD instead */
810 emit_wpos_adjustment(st
->ctx
, t
, program
, invert
, adjX
, adjY
);
815 * Translate Mesa program to TGSI format.
816 * \param program the program to translate
817 * \param numInputs number of input registers used
818 * \param inputMapping maps Mesa fragment program inputs to TGSI generic
820 * \param inputSemanticName the TGSI_SEMANTIC flag for each input
821 * \param inputSemanticIndex the semantic index (ex: which texcoord) for
823 * \param interpMode the TGSI_INTERPOLATE_LINEAR/PERSP mode for each input
824 * \param numOutputs number of output registers used
825 * \param outputMapping maps Mesa fragment program outputs to TGSI
827 * \param outputSemanticName the TGSI_SEMANTIC flag for each output
828 * \param outputSemanticIndex the semantic index (ex: which texcoord) for
831 * \return PIPE_OK or PIPE_ERROR_OUT_OF_MEMORY
834 st_translate_mesa_program(struct gl_context
*ctx
,
836 struct ureg_program
*ureg
,
837 const struct gl_program
*program
,
839 const ubyte inputMapping
[],
840 const ubyte inputSemanticName
[],
841 const ubyte inputSemanticIndex
[],
842 const ubyte interpMode
[],
844 const ubyte outputMapping
[],
845 const ubyte outputSemanticName
[],
846 const ubyte outputSemanticIndex
[])
848 struct st_translate translate
, *t
;
850 enum pipe_error ret
= PIPE_OK
;
852 assert(numInputs
<= ARRAY_SIZE(t
->inputs
));
853 assert(numOutputs
<= ARRAY_SIZE(t
->outputs
));
856 memset(t
, 0, sizeof *t
);
858 t
->procType
= procType
;
859 t
->inputMapping
= inputMapping
;
860 t
->outputMapping
= outputMapping
;
863 /*_mesa_print_program(program);*/
866 * Declare input attributes.
868 if (procType
== PIPE_SHADER_FRAGMENT
) {
869 for (i
= 0; i
< numInputs
; i
++) {
870 t
->inputs
[i
] = ureg_DECL_fs_input(ureg
,
871 inputSemanticName
[i
],
872 inputSemanticIndex
[i
],
876 if (program
->info
.inputs_read
& VARYING_BIT_POS
) {
877 /* Must do this after setting up t->inputs, and before
878 * emitting constant references, below:
880 emit_wpos(st_context(ctx
), t
, program
, ureg
);
884 * Declare output attributes.
886 for (i
= 0; i
< numOutputs
; i
++) {
887 switch (outputSemanticName
[i
]) {
888 case TGSI_SEMANTIC_POSITION
:
889 t
->outputs
[i
] = ureg_DECL_output(ureg
,
890 TGSI_SEMANTIC_POSITION
, /* Z / Depth */
891 outputSemanticIndex
[i
]);
893 t
->outputs
[i
] = ureg_writemask(t
->outputs
[i
],
896 case TGSI_SEMANTIC_STENCIL
:
897 t
->outputs
[i
] = ureg_DECL_output(ureg
,
898 TGSI_SEMANTIC_STENCIL
, /* Stencil */
899 outputSemanticIndex
[i
]);
900 t
->outputs
[i
] = ureg_writemask(t
->outputs
[i
],
903 case TGSI_SEMANTIC_COLOR
:
904 t
->outputs
[i
] = ureg_DECL_output(ureg
,
906 outputSemanticIndex
[i
]);
914 else if (procType
== PIPE_SHADER_GEOMETRY
) {
915 for (i
= 0; i
< numInputs
; i
++) {
916 t
->inputs
[i
] = ureg_DECL_input(ureg
,
917 inputSemanticName
[i
],
918 inputSemanticIndex
[i
], 0, 1);
921 for (i
= 0; i
< numOutputs
; i
++) {
922 t
->outputs
[i
] = ureg_DECL_output(ureg
,
923 outputSemanticName
[i
],
924 outputSemanticIndex
[i
]);
928 assert(procType
== PIPE_SHADER_VERTEX
);
930 for (i
= 0; i
< numInputs
; i
++) {
931 t
->inputs
[i
] = ureg_DECL_vs_input(ureg
, i
);
934 for (i
= 0; i
< numOutputs
; i
++) {
935 t
->outputs
[i
] = ureg_DECL_output(ureg
,
936 outputSemanticName
[i
],
937 outputSemanticIndex
[i
]);
938 if (outputSemanticName
[i
] == TGSI_SEMANTIC_FOG
) {
939 /* force register to contain a fog coordinate in the
943 ureg_writemask(t
->outputs
[i
], TGSI_WRITEMASK_YZW
),
944 ureg_imm4f(ureg
, 0.0f
, 0.0f
, 0.0f
, 1.0f
));
945 t
->outputs
[i
] = ureg_writemask(t
->outputs
[i
], TGSI_WRITEMASK_X
);
950 /* Declare address register.
952 if (program
->arb
.NumAddressRegs
> 0) {
953 debug_assert(program
->arb
.NumAddressRegs
== 1);
954 t
->address
[0] = ureg_DECL_address(ureg
);
957 /* Declare misc input registers
959 GLbitfield64 sysInputs
= program
->info
.system_values_read
;
960 for (i
= 0; sysInputs
; i
++) {
961 if (sysInputs
& (1ull << i
)) {
962 unsigned semName
= tgsi_get_sysval_semantic(i
);
964 t
->systemValues
[i
] = ureg_DECL_system_value(ureg
, semName
, 0);
966 if (semName
== TGSI_SEMANTIC_INSTANCEID
||
967 semName
== TGSI_SEMANTIC_VERTEXID
) {
968 /* From Gallium perspective, these system values are always
969 * integer, and require native integer support. However, if
970 * native integer is supported on the vertex stage but not the
971 * pixel stage (e.g, i915g + draw), Mesa will generate IR that
972 * assumes these system values are floats. To resolve the
973 * inconsistency, we insert a U2F.
975 struct st_context
*st
= st_context(ctx
);
976 struct pipe_screen
*pscreen
= st
->pipe
->screen
;
977 assert(procType
== PIPE_SHADER_VERTEX
);
978 assert(pscreen
->get_shader_param(pscreen
, PIPE_SHADER_VERTEX
,
979 PIPE_SHADER_CAP_INTEGERS
));
980 (void) pscreen
; /* silence non-debug build warnings */
981 if (!ctx
->Const
.NativeIntegers
) {
982 struct ureg_dst temp
= ureg_DECL_local_temporary(t
->ureg
);
983 ureg_U2F(t
->ureg
, ureg_writemask(temp
, TGSI_WRITEMASK_X
),
985 t
->systemValues
[i
] = ureg_scalar(ureg_src(temp
), 0);
989 if (procType
== PIPE_SHADER_FRAGMENT
&&
990 semName
== TGSI_SEMANTIC_POSITION
)
991 emit_wpos(st_context(ctx
), t
, program
, ureg
);
993 sysInputs
&= ~(1ull << i
);
997 if (program
->arb
.IndirectRegisterFiles
& (1 << PROGRAM_TEMPORARY
)) {
998 /* If temps are accessed with indirect addressing, declare temporaries
999 * in sequential order. Else, we declare them on demand elsewhere.
1001 for (i
= 0; i
< program
->arb
.NumTemporaries
; i
++) {
1002 /* XXX use TGSI_FILE_TEMPORARY_ARRAY when it's supported by ureg */
1003 t
->temps
[i
] = ureg_DECL_temporary(t
->ureg
);
1007 /* Emit constants and immediates. Mesa uses a single index space
1008 * for these, so we put all the translated regs in t->constants.
1010 if (program
->Parameters
) {
1011 t
->constants
= calloc(program
->Parameters
->NumParameters
,
1012 sizeof t
->constants
[0]);
1013 if (t
->constants
== NULL
) {
1014 ret
= PIPE_ERROR_OUT_OF_MEMORY
;
1018 for (i
= 0; i
< program
->Parameters
->NumParameters
; i
++) {
1019 unsigned pvo
= program
->Parameters
->ParameterValueOffset
[i
];
1021 switch (program
->Parameters
->Parameters
[i
].Type
) {
1022 case PROGRAM_STATE_VAR
:
1023 case PROGRAM_UNIFORM
:
1024 t
->constants
[i
] = ureg_DECL_constant(ureg
, i
);
1027 /* Emit immediates only when there's no indirect addressing of
1029 * FIXME: Be smarter and recognize param arrays:
1030 * indirect addressing is only valid within the referenced
1033 case PROGRAM_CONSTANT
:
1034 if (program
->arb
.IndirectRegisterFiles
& PROGRAM_ANY_CONST
)
1035 t
->constants
[i
] = ureg_DECL_constant( ureg
, i
);
1038 ureg_DECL_immediate(ureg
,
1040 program
->Parameters
->ParameterValues
+ pvo
,
1049 /* texture samplers */
1051 i
< ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
; i
++) {
1052 if (program
->SamplersUsed
& (1u << i
)) {
1054 translate_texture_index(program
->TexturesUsed
[i
],
1055 !!(program
->ShadowSamplers
& (1 << i
)));
1056 t
->samplers
[i
] = ureg_DECL_sampler(ureg
, i
);
1057 ureg_DECL_sampler_view(ureg
, i
, target
,
1058 TGSI_RETURN_TYPE_FLOAT
,
1059 TGSI_RETURN_TYPE_FLOAT
,
1060 TGSI_RETURN_TYPE_FLOAT
,
1061 TGSI_RETURN_TYPE_FLOAT
);
1066 /* Emit each instruction in turn:
1068 for (i
= 0; i
< program
->arb
.NumInstructions
; i
++)
1069 compile_instruction(ctx
, t
, &program
->arb
.Instructions
[i
]);