1 /**************************************************************************
3 * Copyright 2007 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 **************************************************************************/
32 #include "i915_context.h"
34 #include "i915_debug_private.h"
36 #include "pipe/p_shader_tokens.h"
37 #include "util/u_math.h"
38 #include "util/u_memory.h"
39 #include "util/u_string.h"
40 #include "tgsi/tgsi_parse.h"
41 #include "tgsi/tgsi_dump.h"
43 #include "draw/draw_vertex.h"
46 #define M_PI 3.14159265358979323846
50 * Simple pass-through fragment shader to use when we don't have
51 * a real shader (or it fails to compile for some reason).
53 static unsigned passthrough_decl
[] =
55 _3DSTATE_PIXEL_SHADER_PROGRAM
| ((2*3)-1),
57 /* declare input color:
60 (REG_TYPE_T
<< D0_TYPE_SHIFT
) |
61 (T_DIFFUSE
<< D0_NR_SHIFT
) |
67 static unsigned passthrough_program
[] =
69 /* move to output color:
72 (REG_TYPE_OC
<< A0_DEST_TYPE_SHIFT
) |
74 (REG_TYPE_T
<< A0_SRC0_TYPE_SHIFT
) |
75 (T_DIFFUSE
<< A0_SRC0_NR_SHIFT
)),
76 0x01230000, /* .xyzw */
81 /* 1, -1/3!, 1/5!, -1/7! */
82 static const float scs_sin_constants
[4] = { 1.0,
84 1.0f
/ (5 * 4 * 3 * 2 * 1),
85 -1.0f
/ (7 * 6 * 5 * 4 * 3 * 2 * 1)
88 /* 1, -1/2!, 1/4!, -1/6! */
89 static const float scs_cos_constants
[4] = { 1.0,
91 1.0f
/ (4 * 3 * 2 * 1),
92 -1.0f
/ (6 * 5 * 4 * 3 * 2 * 1)
95 /* 2*pi, -(2*pi)^3/3!, (2*pi)^5/5!, -(2*pi)^7/7! */
96 static const float sin_constants
[4] = { 2.0 * M_PI
,
97 -8.0f
* M_PI
* M_PI
* M_PI
/ (3 * 2 * 1),
98 32.0f
* M_PI
* M_PI
* M_PI
* M_PI
* M_PI
/ (5 * 4 * 3 * 2 * 1),
99 -128.0f
* M_PI
* M_PI
* M_PI
* M_PI
* M_PI
* M_PI
* M_PI
/ (7 * 6 * 5 * 4 * 3 * 2 * 1)
102 /* 1, -(2*pi)^2/2!, (2*pi)^4/4!, -(2*pi)^6/6! */
103 static const float cos_constants
[4] = { 1.0,
104 -4.0f
* M_PI
* M_PI
/ (2 * 1),
105 16.0f
* M_PI
* M_PI
* M_PI
* M_PI
/ (4 * 3 * 2 * 1),
106 -64.0f
* M_PI
* M_PI
* M_PI
* M_PI
* M_PI
* M_PI
/ (6 * 5 * 4 * 3 * 2 * 1)
112 * component-wise negation of ureg
115 negate(int reg
, int x
, int y
, int z
, int w
)
117 /* Another neat thing about the UREG representation */
118 return reg
^ (((x
& 1) << UREG_CHANNEL_X_NEGATE_SHIFT
) |
119 ((y
& 1) << UREG_CHANNEL_Y_NEGATE_SHIFT
) |
120 ((z
& 1) << UREG_CHANNEL_Z_NEGATE_SHIFT
) |
121 ((w
& 1) << UREG_CHANNEL_W_NEGATE_SHIFT
));
126 * In the event of a translation failure, we'll generate a simple color
127 * pass-through program.
130 i915_use_passthrough_shader(struct i915_fragment_shader
*fs
)
132 fs
->program
= (uint
*) MALLOC(sizeof(passthrough_program
));
133 fs
->decl
= (uint
*) MALLOC(sizeof(passthrough_decl
));
135 memcpy(fs
->program
, passthrough_program
, sizeof(passthrough_program
));
136 memcpy(fs
->decl
, passthrough_decl
, sizeof(passthrough_decl
));
137 fs
->program_len
= Elements(passthrough_program
);
138 fs
->decl_len
= Elements(passthrough_decl
);
140 fs
->num_constants
= 0;
145 i915_program_error(struct i915_fp_compile
*p
, const char *msg
, ...)
150 debug_printf("i915_program_error: ");
151 va_start( args
, msg
);
152 util_vsnprintf( buffer
, sizeof(buffer
), msg
, args
);
154 debug_printf("%s", buffer
);
160 static uint
get_mapping(struct i915_fragment_shader
* fs
, int unit
)
163 for (i
= 0; i
< I915_TEX_UNITS
; i
++)
165 if (fs
->generic_mapping
[i
] == -1) {
166 fs
->generic_mapping
[i
] = unit
;
169 if (fs
->generic_mapping
[i
] == unit
)
172 debug_printf("Exceeded max generics\n");
177 * Construct a ureg for the given source register. Will emit
178 * constants, apply swizzling and negation as needed.
181 src_vector(struct i915_fp_compile
*p
,
182 const struct i915_full_src_register
*source
,
183 struct i915_fragment_shader
*fs
)
185 uint index
= source
->Register
.Index
;
186 uint src
= 0, sem_name
, sem_ind
;
188 switch (source
->Register
.File
) {
189 case TGSI_FILE_TEMPORARY
:
190 if (source
->Register
.Index
>= I915_MAX_TEMPORARY
) {
191 i915_program_error(p
, "Exceeded max temporary reg");
194 src
= UREG(REG_TYPE_R
, index
);
196 case TGSI_FILE_INPUT
:
197 /* XXX: Packing COL1, FOGC into a single attribute works for
198 * texenv programs, but will fail for real fragment programs
199 * that use these attributes and expect them to be a full 4
200 * components wide. Could use a texcoord to pass these
201 * attributes if necessary, but that won't work in the general
204 * We also use a texture coordinate to pass wpos when possible.
207 sem_name
= p
->shader
->info
.input_semantic_name
[index
];
208 sem_ind
= p
->shader
->info
.input_semantic_index
[index
];
211 case TGSI_SEMANTIC_POSITION
:
214 int real_tex_unit
= get_mapping(fs
, I915_SEMANTIC_POS
);
215 src
= i915_emit_decl(p
, REG_TYPE_T
, T_TEX0
+ real_tex_unit
, D0_CHANNEL_ALL
);
218 case TGSI_SEMANTIC_COLOR
:
220 src
= i915_emit_decl(p
, REG_TYPE_T
, T_DIFFUSE
, D0_CHANNEL_ALL
);
223 /* secondary color */
224 assert(sem_ind
== 1);
225 src
= i915_emit_decl(p
, REG_TYPE_T
, T_SPECULAR
, D0_CHANNEL_XYZ
);
226 src
= swizzle(src
, X
, Y
, Z
, ONE
);
229 case TGSI_SEMANTIC_FOG
:
230 src
= i915_emit_decl(p
, REG_TYPE_T
, T_FOG_W
, D0_CHANNEL_W
);
231 src
= swizzle(src
, W
, W
, W
, W
);
233 case TGSI_SEMANTIC_GENERIC
:
235 int real_tex_unit
= get_mapping(fs
, sem_ind
);
236 src
= i915_emit_decl(p
, REG_TYPE_T
, T_TEX0
+ real_tex_unit
, D0_CHANNEL_ALL
);
239 case TGSI_SEMANTIC_FACE
:
241 /* for back/front faces */
242 int real_tex_unit
= get_mapping(fs
, I915_SEMANTIC_FACE
);
243 src
= i915_emit_decl(p
, REG_TYPE_T
, T_TEX0
+ real_tex_unit
, D0_CHANNEL_X
);
247 i915_program_error(p
, "Bad source->Index");
252 case TGSI_FILE_IMMEDIATE
:
253 assert(index
< p
->num_immediates
);
254 index
= p
->immediates_map
[index
];
256 case TGSI_FILE_CONSTANT
:
257 src
= UREG(REG_TYPE_CONST
, index
);
261 i915_program_error(p
, "Bad source->File");
266 source
->Register
.SwizzleX
,
267 source
->Register
.SwizzleY
,
268 source
->Register
.SwizzleZ
,
269 source
->Register
.SwizzleW
);
271 /* There's both negate-all-components and per-component negation.
272 * Try to handle both here.
275 int n
= source
->Register
.Negate
;
276 src
= negate(src
, n
, n
, n
, n
);
281 /* XXX assertions disabled to allow arbfplight.c to run */
282 /* XXX enable these assertions, or fix things */
283 assert(!source
->Register
.Absolute
);
285 if (source
->Register
.Absolute
)
286 debug_printf("Unhandled absolute value\n");
293 * Construct a ureg for a destination register.
296 get_result_vector(struct i915_fp_compile
*p
,
297 const struct i915_full_dst_register
*dest
)
299 switch (dest
->Register
.File
) {
300 case TGSI_FILE_OUTPUT
:
302 uint sem_name
= p
->shader
->info
.output_semantic_name
[dest
->Register
.Index
];
304 case TGSI_SEMANTIC_POSITION
:
305 return UREG(REG_TYPE_OD
, 0);
306 case TGSI_SEMANTIC_COLOR
:
307 return UREG(REG_TYPE_OC
, 0);
309 i915_program_error(p
, "Bad inst->DstReg.Index/semantics");
313 case TGSI_FILE_TEMPORARY
:
314 return UREG(REG_TYPE_R
, dest
->Register
.Index
);
316 i915_program_error(p
, "Bad inst->DstReg.File");
323 * Compute flags for saturation and writemask.
326 get_result_flags(const struct i915_full_instruction
*inst
)
329 = inst
->Dst
[0].Register
.WriteMask
;
332 if (inst
->Instruction
.Saturate
== TGSI_SAT_ZERO_ONE
)
333 flags
|= A0_DEST_SATURATE
;
335 if (writeMask
& TGSI_WRITEMASK_X
)
336 flags
|= A0_DEST_CHANNEL_X
;
337 if (writeMask
& TGSI_WRITEMASK_Y
)
338 flags
|= A0_DEST_CHANNEL_Y
;
339 if (writeMask
& TGSI_WRITEMASK_Z
)
340 flags
|= A0_DEST_CHANNEL_Z
;
341 if (writeMask
& TGSI_WRITEMASK_W
)
342 flags
|= A0_DEST_CHANNEL_W
;
349 * Convert TGSI_TEXTURE_x token to DO_SAMPLE_TYPE_x token
352 translate_tex_src_target(struct i915_fp_compile
*p
, uint tex
)
355 case TGSI_TEXTURE_SHADOW1D
:
357 case TGSI_TEXTURE_1D
:
358 return D0_SAMPLE_TYPE_2D
;
360 case TGSI_TEXTURE_SHADOW2D
:
362 case TGSI_TEXTURE_2D
:
363 return D0_SAMPLE_TYPE_2D
;
365 case TGSI_TEXTURE_SHADOWRECT
:
367 case TGSI_TEXTURE_RECT
:
368 return D0_SAMPLE_TYPE_2D
;
370 case TGSI_TEXTURE_3D
:
371 return D0_SAMPLE_TYPE_VOLUME
;
373 case TGSI_TEXTURE_CUBE
:
374 return D0_SAMPLE_TYPE_CUBE
;
377 i915_program_error(p
, "TexSrc type");
383 * Return the number of coords needed to access a given TGSI_TEXTURE_*
386 i915_num_coords(uint tex
)
389 case TGSI_TEXTURE_SHADOW1D
:
390 case TGSI_TEXTURE_1D
:
393 case TGSI_TEXTURE_SHADOW2D
:
394 case TGSI_TEXTURE_2D
:
395 case TGSI_TEXTURE_SHADOWRECT
:
396 case TGSI_TEXTURE_RECT
:
399 case TGSI_TEXTURE_3D
:
400 case TGSI_TEXTURE_CUBE
:
404 debug_printf("Unknown texture target for num coords");
411 * Generate texel lookup instruction.
414 emit_tex(struct i915_fp_compile
*p
,
415 const struct i915_full_instruction
*inst
,
417 struct i915_fragment_shader
* fs
)
419 uint texture
= inst
->Texture
.Texture
;
420 uint unit
= inst
->Src
[1].Register
.Index
;
421 uint tex
= translate_tex_src_target( p
, texture
);
422 uint sampler
= i915_emit_decl(p
, REG_TYPE_S
, unit
, tex
);
423 uint coord
= src_vector( p
, &inst
->Src
[0], fs
);
426 get_result_vector( p
, &inst
->Dst
[0] ),
427 get_result_flags( inst
),
431 i915_num_coords(texture
) );
436 * Generate a simple arithmetic instruction
437 * \param opcode the i915 opcode
438 * \param numArgs the number of input/src arguments
441 emit_simple_arith(struct i915_fp_compile
*p
,
442 const struct i915_full_instruction
*inst
,
443 uint opcode
, uint numArgs
,
444 struct i915_fragment_shader
*fs
)
446 uint arg1
, arg2
, arg3
;
448 assert(numArgs
<= 3);
450 arg1
= (numArgs
< 1) ? 0 : src_vector( p
, &inst
->Src
[0], fs
);
451 arg2
= (numArgs
< 2) ? 0 : src_vector( p
, &inst
->Src
[1], fs
);
452 arg3
= (numArgs
< 3) ? 0 : src_vector( p
, &inst
->Src
[2], fs
);
456 get_result_vector( p
, &inst
->Dst
[0]),
457 get_result_flags( inst
), 0,
464 /** As above, but swap the first two src regs */
466 emit_simple_arith_swap2(struct i915_fp_compile
*p
,
467 const struct i915_full_instruction
*inst
,
468 uint opcode
, uint numArgs
,
469 struct i915_fragment_shader
*fs
)
471 struct i915_full_instruction inst2
;
473 assert(numArgs
== 2);
475 /* transpose first two registers */
477 inst2
.Src
[0] = inst
->Src
[1];
478 inst2
.Src
[1] = inst
->Src
[0];
480 emit_simple_arith(p
, &inst2
, opcode
, numArgs
, fs
);
484 * Translate TGSI instruction to i915 instruction.
488 * DDX, DDY -- return 0
489 * SIN, COS -- could use another taylor step?
490 * LIT -- results seem a little different to sw mesa
491 * LOG -- different to mesa on negative numbers, but this is conformant.
494 i915_translate_instruction(struct i915_fp_compile
*p
,
495 const struct i915_full_instruction
*inst
,
496 struct i915_fragment_shader
*fs
)
499 uint src0
, src1
, src2
, flags
;
502 switch (inst
->Instruction
.Opcode
) {
503 case TGSI_OPCODE_ABS
:
504 src0
= src_vector(p
, &inst
->Src
[0], fs
);
507 get_result_vector(p
, &inst
->Dst
[0]),
508 get_result_flags(inst
), 0,
509 src0
, negate(src0
, 1, 1, 1, 1), 0);
512 case TGSI_OPCODE_ADD
:
513 emit_simple_arith(p
, inst
, A0_ADD
, 2, fs
);
516 case TGSI_OPCODE_CEIL
:
517 src0
= src_vector(p
, &inst
->Src
[0], fs
);
518 tmp
= i915_get_utemp(p
);
519 flags
= get_result_flags(inst
);
523 flags
& A0_DEST_CHANNEL_ALL
, 0,
524 negate(src0
, 1, 1, 1, 1), 0, 0);
527 get_result_vector(p
, &inst
->Dst
[0]),
529 negate(tmp
, 1, 1, 1, 1), 0, 0);
532 case TGSI_OPCODE_CMP
:
533 src0
= src_vector(p
, &inst
->Src
[0], fs
);
534 src1
= src_vector(p
, &inst
->Src
[1], fs
);
535 src2
= src_vector(p
, &inst
->Src
[2], fs
);
536 i915_emit_arith(p
, A0_CMP
,
537 get_result_vector(p
, &inst
->Dst
[0]),
538 get_result_flags(inst
),
539 0, src0
, src2
, src1
); /* NOTE: order of src2, src1 */
542 case TGSI_OPCODE_COS
:
543 src0
= src_vector(p
, &inst
->Src
[0], fs
);
544 tmp
= i915_get_utemp(p
);
548 tmp
, A0_DEST_CHANNEL_X
, 0,
549 src0
, i915_emit_const1f(p
, 1.0f
/ (float) (M_PI
* 2.0)), 0);
551 i915_emit_arith(p
, A0_MOD
, tmp
, A0_DEST_CHANNEL_X
, 0, tmp
, 0, 0);
554 * t0.xy = MUL x.xx11, x.x111 ; x^2, x, 1, 1
555 * t0 = MUL t0.xyxy t0.xx11 ; x^4, x^3, x^2, 1
556 * t0 = MUL t0.xxz1 t0.z111 ; x^6 x^4 x^2 1
557 * result = DP4 t0, cos_constants
561 tmp
, A0_DEST_CHANNEL_XY
, 0,
562 swizzle(tmp
, X
, X
, ONE
, ONE
),
563 swizzle(tmp
, X
, ONE
, ONE
, ONE
), 0);
567 tmp
, A0_DEST_CHANNEL_XYZ
, 0,
568 swizzle(tmp
, X
, Y
, X
, ONE
),
569 swizzle(tmp
, X
, X
, ONE
, ONE
), 0);
573 tmp
, A0_DEST_CHANNEL_XYZ
, 0,
574 swizzle(tmp
, X
, X
, Z
, ONE
),
575 swizzle(tmp
, Z
, ONE
, ONE
, ONE
), 0);
579 get_result_vector(p
, &inst
->Dst
[0]),
580 get_result_flags(inst
), 0,
581 swizzle(tmp
, ONE
, Z
, Y
, X
),
582 i915_emit_const4fv(p
, cos_constants
), 0);
585 case TGSI_OPCODE_DDX
:
586 case TGSI_OPCODE_DDY
:
587 /* XXX We just output 0 here */
588 debug_printf("Punting DDX/DDX\n");
589 src0
= get_result_vector(p
, &inst
->Dst
[0]);
592 get_result_vector(p
, &inst
->Dst
[0]),
593 get_result_flags(inst
), 0,
594 swizzle(src0
, ZERO
, ZERO
, ZERO
, ZERO
), 0, 0);
597 case TGSI_OPCODE_DP2
:
598 src0
= src_vector(p
, &inst
->Src
[0], fs
);
599 src1
= src_vector(p
, &inst
->Src
[1], fs
);
603 get_result_vector(p
, &inst
->Dst
[0]),
604 get_result_flags(inst
), 0,
605 swizzle(src0
, X
, Y
, ZERO
, ZERO
), src1
, 0);
608 case TGSI_OPCODE_DP3
:
609 emit_simple_arith(p
, inst
, A0_DP3
, 2, fs
);
612 case TGSI_OPCODE_DP4
:
613 emit_simple_arith(p
, inst
, A0_DP4
, 2, fs
);
616 case TGSI_OPCODE_DPH
:
617 src0
= src_vector(p
, &inst
->Src
[0], fs
);
618 src1
= src_vector(p
, &inst
->Src
[1], fs
);
622 get_result_vector(p
, &inst
->Dst
[0]),
623 get_result_flags(inst
), 0,
624 swizzle(src0
, X
, Y
, Z
, ONE
), src1
, 0);
627 case TGSI_OPCODE_DST
:
628 src0
= src_vector(p
, &inst
->Src
[0], fs
);
629 src1
= src_vector(p
, &inst
->Src
[1], fs
);
631 /* result[0] = 1 * 1;
632 * result[1] = a[1] * b[1];
633 * result[2] = a[2] * 1;
634 * result[3] = 1 * b[3];
638 get_result_vector(p
, &inst
->Dst
[0]),
639 get_result_flags(inst
), 0,
640 swizzle(src0
, ONE
, Y
, Z
, ONE
),
641 swizzle(src1
, ONE
, Y
, ONE
, W
), 0);
644 case TGSI_OPCODE_END
:
648 case TGSI_OPCODE_EX2
:
649 src0
= src_vector(p
, &inst
->Src
[0], fs
);
653 get_result_vector(p
, &inst
->Dst
[0]),
654 get_result_flags(inst
), 0,
655 swizzle(src0
, X
, X
, X
, X
), 0, 0);
658 case TGSI_OPCODE_FLR
:
659 emit_simple_arith(p
, inst
, A0_FLR
, 1, fs
);
662 case TGSI_OPCODE_FRC
:
663 emit_simple_arith(p
, inst
, A0_FRC
, 1, fs
);
666 case TGSI_OPCODE_KILL_IF
:
667 /* kill if src[0].x < 0 || src[0].y < 0 ... */
668 src0
= src_vector(p
, &inst
->Src
[0], fs
);
669 tmp
= i915_get_utemp(p
);
672 tmp
, /* dest reg: a dummy reg */
673 A0_DEST_CHANNEL_ALL
, /* dest writemask */
676 T0_TEXKILL
, /* opcode */
680 case TGSI_OPCODE_KILL
:
681 /* unconditional kill */
682 tmp
= i915_get_utemp(p
);
685 tmp
, /* dest reg: a dummy reg */
686 A0_DEST_CHANNEL_ALL
, /* dest writemask */
688 negate(swizzle(0, ONE
, ONE
, ONE
, ONE
), 1, 1, 1, 1), /* coord */
689 T0_TEXKILL
, /* opcode */
693 case TGSI_OPCODE_LG2
:
694 src0
= src_vector(p
, &inst
->Src
[0], fs
);
698 get_result_vector(p
, &inst
->Dst
[0]),
699 get_result_flags(inst
), 0,
700 swizzle(src0
, X
, X
, X
, X
), 0, 0);
703 case TGSI_OPCODE_LIT
:
704 src0
= src_vector(p
, &inst
->Src
[0], fs
);
705 tmp
= i915_get_utemp(p
);
707 /* tmp = max( a.xyzw, a.00zw )
708 * XXX: Clamp tmp.w to -128..128
710 * tmp.y = tmp.w * tmp.y
712 * result = cmp (a.11-x1, a.1x01, a.1xy1 )
714 i915_emit_arith(p
, A0_MAX
, tmp
, A0_DEST_CHANNEL_ALL
, 0,
715 src0
, swizzle(src0
, ZERO
, ZERO
, Z
, W
), 0);
717 i915_emit_arith(p
, A0_LOG
, tmp
, A0_DEST_CHANNEL_Y
, 0,
718 swizzle(tmp
, Y
, Y
, Y
, Y
), 0, 0);
720 i915_emit_arith(p
, A0_MUL
, tmp
, A0_DEST_CHANNEL_Y
, 0,
721 swizzle(tmp
, ZERO
, Y
, ZERO
, ZERO
),
722 swizzle(tmp
, ZERO
, W
, ZERO
, ZERO
), 0);
724 i915_emit_arith(p
, A0_EXP
, tmp
, A0_DEST_CHANNEL_Y
, 0,
725 swizzle(tmp
, Y
, Y
, Y
, Y
), 0, 0);
727 i915_emit_arith(p
, A0_CMP
,
728 get_result_vector(p
, &inst
->Dst
[0]),
729 get_result_flags(inst
), 0,
730 negate(swizzle(tmp
, ONE
, ONE
, X
, ONE
), 0, 0, 1, 0),
731 swizzle(tmp
, ONE
, X
, ZERO
, ONE
),
732 swizzle(tmp
, ONE
, X
, Y
, ONE
));
736 case TGSI_OPCODE_LRP
:
737 src0
= src_vector(p
, &inst
->Src
[0], fs
);
738 src1
= src_vector(p
, &inst
->Src
[1], fs
);
739 src2
= src_vector(p
, &inst
->Src
[2], fs
);
740 flags
= get_result_flags(inst
);
741 tmp
= i915_get_utemp(p
);
748 * result = (-c)*a + tmp
750 i915_emit_arith(p
, A0_MAD
, tmp
,
751 flags
& A0_DEST_CHANNEL_ALL
, 0, src1
, src0
, src2
);
753 i915_emit_arith(p
, A0_MAD
,
754 get_result_vector(p
, &inst
->Dst
[0]),
755 flags
, 0, negate(src2
, 1, 1, 1, 1), src0
, tmp
);
758 case TGSI_OPCODE_MAD
:
759 emit_simple_arith(p
, inst
, A0_MAD
, 3, fs
);
762 case TGSI_OPCODE_MAX
:
763 emit_simple_arith(p
, inst
, A0_MAX
, 2, fs
);
766 case TGSI_OPCODE_MIN
:
767 src0
= src_vector(p
, &inst
->Src
[0], fs
);
768 src1
= src_vector(p
, &inst
->Src
[1], fs
);
769 tmp
= i915_get_utemp(p
);
770 flags
= get_result_flags(inst
);
774 tmp
, flags
& A0_DEST_CHANNEL_ALL
, 0,
775 negate(src0
, 1, 1, 1, 1),
776 negate(src1
, 1, 1, 1, 1), 0);
780 get_result_vector(p
, &inst
->Dst
[0]),
781 flags
, 0, negate(tmp
, 1, 1, 1, 1), 0, 0);
784 case TGSI_OPCODE_MOV
:
785 emit_simple_arith(p
, inst
, A0_MOV
, 1, fs
);
788 case TGSI_OPCODE_MUL
:
789 emit_simple_arith(p
, inst
, A0_MUL
, 2, fs
);
792 case TGSI_OPCODE_NOP
:
795 case TGSI_OPCODE_POW
:
796 src0
= src_vector(p
, &inst
->Src
[0], fs
);
797 src1
= src_vector(p
, &inst
->Src
[1], fs
);
798 tmp
= i915_get_utemp(p
);
799 flags
= get_result_flags(inst
);
801 /* XXX: masking on intermediate values, here and elsewhere.
805 tmp
, A0_DEST_CHANNEL_X
, 0,
806 swizzle(src0
, X
, X
, X
, X
), 0, 0);
808 i915_emit_arith(p
, A0_MUL
, tmp
, A0_DEST_CHANNEL_X
, 0, tmp
, src1
, 0);
812 get_result_vector(p
, &inst
->Dst
[0]),
813 flags
, 0, swizzle(tmp
, X
, X
, X
, X
), 0, 0);
816 case TGSI_OPCODE_RET
:
820 case TGSI_OPCODE_RCP
:
821 src0
= src_vector(p
, &inst
->Src
[0], fs
);
825 get_result_vector(p
, &inst
->Dst
[0]),
826 get_result_flags(inst
), 0,
827 swizzle(src0
, X
, X
, X
, X
), 0, 0);
830 case TGSI_OPCODE_RSQ
:
831 src0
= src_vector(p
, &inst
->Src
[0], fs
);
835 get_result_vector(p
, &inst
->Dst
[0]),
836 get_result_flags(inst
), 0,
837 swizzle(src0
, X
, X
, X
, X
), 0, 0);
840 case TGSI_OPCODE_SCS
:
841 src0
= src_vector(p
, &inst
->Src
[0], fs
);
842 tmp
= i915_get_utemp(p
);
845 * t0.xy = MUL x.xx11, x.x1111 ; x^2, x, 1, 1
846 * t0 = MUL t0.xyxy t0.xx11 ; x^4, x^3, x^2, x
847 * t1 = MUL t0.xyyw t0.yz11 ; x^7 x^5 x^3 x
848 * scs.x = DP4 t1, scs_sin_constants
849 * t1 = MUL t0.xxz1 t0.z111 ; x^6 x^4 x^2 1
850 * scs.y = DP4 t1, scs_cos_constants
854 tmp
, A0_DEST_CHANNEL_XY
, 0,
855 swizzle(src0
, X
, X
, ONE
, ONE
),
856 swizzle(src0
, X
, ONE
, ONE
, ONE
), 0);
860 tmp
, A0_DEST_CHANNEL_ALL
, 0,
861 swizzle(tmp
, X
, Y
, X
, Y
),
862 swizzle(tmp
, X
, X
, ONE
, ONE
), 0);
864 writemask
= inst
->Dst
[0].Register
.WriteMask
;
866 if (writemask
& TGSI_WRITEMASK_Y
) {
869 if (writemask
& TGSI_WRITEMASK_X
)
870 tmp1
= i915_get_utemp(p
);
876 tmp1
, A0_DEST_CHANNEL_ALL
, 0,
877 swizzle(tmp
, X
, Y
, Y
, W
),
878 swizzle(tmp
, X
, Z
, ONE
, ONE
), 0);
882 get_result_vector(p
, &inst
->Dst
[0]),
883 A0_DEST_CHANNEL_Y
, 0,
884 swizzle(tmp1
, W
, Z
, Y
, X
),
885 i915_emit_const4fv(p
, scs_sin_constants
), 0);
888 if (writemask
& TGSI_WRITEMASK_X
) {
891 tmp
, A0_DEST_CHANNEL_XYZ
, 0,
892 swizzle(tmp
, X
, X
, Z
, ONE
),
893 swizzle(tmp
, Z
, ONE
, ONE
, ONE
), 0);
897 get_result_vector(p
, &inst
->Dst
[0]),
898 A0_DEST_CHANNEL_X
, 0,
899 swizzle(tmp
, ONE
, Z
, Y
, X
),
900 i915_emit_const4fv(p
, scs_cos_constants
), 0);
904 case TGSI_OPCODE_SEQ
:
905 /* if we're both >= and <= then we're == */
906 src0
= src_vector(p
, &inst
->Src
[0], fs
);
907 src1
= src_vector(p
, &inst
->Src
[1], fs
);
908 tmp
= i915_get_utemp(p
);
912 tmp
, A0_DEST_CHANNEL_ALL
, 0,
918 get_result_vector(p
, &inst
->Dst
[0]),
919 A0_DEST_CHANNEL_ALL
, 0,
925 get_result_vector(p
, &inst
->Dst
[0]),
926 A0_DEST_CHANNEL_ALL
, 0,
927 get_result_vector(p
, &inst
->Dst
[0]),
932 case TGSI_OPCODE_SGE
:
933 emit_simple_arith(p
, inst
, A0_SGE
, 2, fs
);
936 case TGSI_OPCODE_SIN
:
937 src0
= src_vector(p
, &inst
->Src
[0], fs
);
938 tmp
= i915_get_utemp(p
);
942 tmp
, A0_DEST_CHANNEL_X
, 0,
943 src0
, i915_emit_const1f(p
, 1.0f
/ (float) (M_PI
* 2.0)), 0);
945 i915_emit_arith(p
, A0_MOD
, tmp
, A0_DEST_CHANNEL_X
, 0, tmp
, 0, 0);
948 * t0.xy = MUL x.xx11, x.x1111 ; x^2, x, 1, 1
949 * t0 = MUL t0.xyxy t0.xx11 ; x^4, x^3, x^2, x
950 * t1 = MUL t0.xyyw t0.yz11 ; x^7 x^5 x^3 x
951 * result = DP4 t1.wzyx, sin_constants
955 tmp
, A0_DEST_CHANNEL_XY
, 0,
956 swizzle(tmp
, X
, X
, ONE
, ONE
),
957 swizzle(tmp
, X
, ONE
, ONE
, ONE
), 0);
961 tmp
, A0_DEST_CHANNEL_ALL
, 0,
962 swizzle(tmp
, X
, Y
, X
, Y
),
963 swizzle(tmp
, X
, X
, ONE
, ONE
), 0);
967 tmp
, A0_DEST_CHANNEL_ALL
, 0,
968 swizzle(tmp
, X
, Y
, Y
, W
),
969 swizzle(tmp
, X
, Z
, ONE
, ONE
), 0);
973 get_result_vector(p
, &inst
->Dst
[0]),
974 get_result_flags(inst
), 0,
975 swizzle(tmp
, W
, Z
, Y
, X
),
976 i915_emit_const4fv(p
, sin_constants
), 0);
979 case TGSI_OPCODE_SLE
:
980 /* like SGE, but swap reg0, reg1 */
981 emit_simple_arith_swap2(p
, inst
, A0_SGE
, 2, fs
);
984 case TGSI_OPCODE_SLT
:
985 emit_simple_arith(p
, inst
, A0_SLT
, 2, fs
);
988 case TGSI_OPCODE_SGT
:
989 /* like SLT, but swap reg0, reg1 */
990 emit_simple_arith_swap2(p
, inst
, A0_SLT
, 2, fs
);
993 case TGSI_OPCODE_SNE
:
994 /* if we're < or > then we're != */
995 src0
= src_vector(p
, &inst
->Src
[0], fs
);
996 src1
= src_vector(p
, &inst
->Src
[1], fs
);
997 tmp
= i915_get_utemp(p
);
1002 A0_DEST_CHANNEL_ALL
, 0,
1008 get_result_vector(p
, &inst
->Dst
[0]),
1009 A0_DEST_CHANNEL_ALL
, 0,
1015 get_result_vector(p
, &inst
->Dst
[0]),
1016 A0_DEST_CHANNEL_ALL
, 0,
1017 get_result_vector(p
, &inst
->Dst
[0]),
1021 case TGSI_OPCODE_SSG
:
1022 /* compute (src>0) - (src<0) */
1023 src0
= src_vector(p
, &inst
->Src
[0], fs
);
1024 tmp
= i915_get_utemp(p
);
1029 A0_DEST_CHANNEL_ALL
, 0,
1031 swizzle(src0
, ZERO
, ZERO
, ZERO
, ZERO
), 0);
1035 get_result_vector(p
, &inst
->Dst
[0]),
1036 A0_DEST_CHANNEL_ALL
, 0,
1037 swizzle(src0
, ZERO
, ZERO
, ZERO
, ZERO
),
1042 get_result_vector(p
, &inst
->Dst
[0]),
1043 A0_DEST_CHANNEL_ALL
, 0,
1044 get_result_vector(p
, &inst
->Dst
[0]),
1045 negate(tmp
, 1, 1, 1, 1), 0);
1048 case TGSI_OPCODE_SUB
:
1049 src0
= src_vector(p
, &inst
->Src
[0], fs
);
1050 src1
= src_vector(p
, &inst
->Src
[1], fs
);
1054 get_result_vector(p
, &inst
->Dst
[0]),
1055 get_result_flags(inst
), 0,
1056 src0
, negate(src1
, 1, 1, 1, 1), 0);
1059 case TGSI_OPCODE_TEX
:
1060 emit_tex(p
, inst
, T0_TEXLD
, fs
);
1063 case TGSI_OPCODE_TRUNC
:
1064 emit_simple_arith(p
, inst
, A0_TRC
, 1, fs
);
1067 case TGSI_OPCODE_TXB
:
1068 emit_tex(p
, inst
, T0_TEXLDB
, fs
);
1071 case TGSI_OPCODE_TXP
:
1072 emit_tex(p
, inst
, T0_TEXLDP
, fs
);
1075 case TGSI_OPCODE_XPD
:
1077 * result.x = src0.y * src1.z - src0.z * src1.y;
1078 * result.y = src0.z * src1.x - src0.x * src1.z;
1079 * result.z = src0.x * src1.y - src0.y * src1.x;
1082 src0
= src_vector(p
, &inst
->Src
[0], fs
);
1083 src1
= src_vector(p
, &inst
->Src
[1], fs
);
1084 tmp
= i915_get_utemp(p
);
1088 tmp
, A0_DEST_CHANNEL_ALL
, 0,
1089 swizzle(src0
, Z
, X
, Y
, ONE
),
1090 swizzle(src1
, Y
, Z
, X
, ONE
), 0);
1094 get_result_vector(p
, &inst
->Dst
[0]),
1095 get_result_flags(inst
), 0,
1096 swizzle(src0
, Y
, Z
, X
, ONE
),
1097 swizzle(src1
, Z
, X
, Y
, ONE
),
1098 negate(tmp
, 1, 1, 1, 0));
1102 i915_program_error(p
, "bad opcode %d", inst
->Instruction
.Opcode
);
1107 i915_release_utemps(p
);
1111 static void i915_translate_token(struct i915_fp_compile
*p
,
1112 const union i915_full_token
*token
,
1113 struct i915_fragment_shader
*fs
)
1115 struct i915_fragment_shader
*ifs
= p
->shader
;
1116 switch( token
->Token
.Type
) {
1117 case TGSI_TOKEN_TYPE_PROPERTY
:
1119 * We only support one cbuf, but we still need to ignore the property
1120 * correctly so we don't hit the assert at the end of the switch case.
1122 assert(token
->FullProperty
.Property
.PropertyName
==
1123 TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS
);
1126 case TGSI_TOKEN_TYPE_DECLARATION
:
1127 if (token
->FullDeclaration
.Declaration
.File
1128 == TGSI_FILE_CONSTANT
) {
1130 for (i
= token
->FullDeclaration
.Range
.First
;
1131 i
<= MIN2(token
->FullDeclaration
.Range
.Last
, I915_MAX_CONSTANT
- 1);
1133 assert(ifs
->constant_flags
[i
] == 0x0);
1134 ifs
->constant_flags
[i
] = I915_CONSTFLAG_USER
;
1135 ifs
->num_constants
= MAX2(ifs
->num_constants
, i
+ 1);
1138 else if (token
->FullDeclaration
.Declaration
.File
1139 == TGSI_FILE_TEMPORARY
) {
1141 for (i
= token
->FullDeclaration
.Range
.First
;
1142 i
<= token
->FullDeclaration
.Range
.Last
;
1144 if (i
>= I915_MAX_TEMPORARY
)
1145 debug_printf("Too many temps (%d)\n",i
);
1147 /* XXX just use shader->info->file_mask[TGSI_FILE_TEMPORARY] */
1148 p
->temp_flag
|= (1 << i
); /* mark temp as used */
1153 case TGSI_TOKEN_TYPE_IMMEDIATE
:
1155 const struct tgsi_full_immediate
*imm
1156 = &token
->FullImmediate
;
1157 const uint pos
= p
->num_immediates
++;
1159 assert( imm
->Immediate
.NrTokens
<= 4 + 1 );
1160 for (j
= 0; j
< imm
->Immediate
.NrTokens
- 1; j
++) {
1161 p
->immediates
[pos
][j
] = imm
->u
[j
].Float
;
1166 case TGSI_TOKEN_TYPE_INSTRUCTION
:
1167 if (p
->first_instruction
) {
1168 /* resolve location of immediates */
1170 for (i
= 0; i
< p
->num_immediates
; i
++) {
1171 /* find constant slot for this immediate */
1172 for (j
= 0; j
< I915_MAX_CONSTANT
; j
++) {
1173 if (ifs
->constant_flags
[j
] == 0x0) {
1174 memcpy(ifs
->constants
[j
],
1177 /*printf("immediate %d maps to const %d\n", i, j);*/
1178 ifs
->constant_flags
[j
] = 0xf; /* all four comps used */
1179 p
->immediates_map
[i
] = j
;
1180 ifs
->num_constants
= MAX2(ifs
->num_constants
, j
+ 1);
1186 p
->first_instruction
= FALSE
;
1189 i915_translate_instruction(p
, &token
->FullInstruction
, fs
);
1199 * Translate TGSI fragment shader into i915 hardware instructions.
1200 * \param p the translation state
1201 * \param tokens the TGSI token array
1204 i915_translate_instructions(struct i915_fp_compile
*p
,
1205 const struct i915_token_list
*tokens
,
1206 struct i915_fragment_shader
*fs
)
1209 for(i
= 0; i
<tokens
->NumTokens
; i
++) {
1210 i915_translate_token(p
, &tokens
->Tokens
[i
], fs
);
1215 static struct i915_fp_compile
*
1216 i915_init_compile(struct i915_context
*i915
,
1217 struct i915_fragment_shader
*ifs
)
1219 struct i915_fp_compile
*p
= CALLOC_STRUCT(i915_fp_compile
);
1224 /* Put new constants at end of const buffer, growing downward.
1225 * The problem is we don't know how many user-defined constants might
1226 * be specified with pipe->set_constant_buffer().
1227 * Should pre-scan the user's program to determine the highest-numbered
1228 * constant referenced.
1230 ifs
->num_constants
= 0;
1231 memset(ifs
->constant_flags
, 0, sizeof(ifs
->constant_flags
));
1233 memset(&p
->register_phases
, 0, sizeof(p
->register_phases
));
1235 for (i
= 0; i
< I915_TEX_UNITS
; i
++)
1236 ifs
->generic_mapping
[i
] = -1;
1238 p
->first_instruction
= TRUE
;
1240 p
->nr_tex_indirect
= 1; /* correct? */
1243 p
->nr_decl_insn
= 0;
1245 p
->csr
= p
->program
;
1246 p
->decl
= p
->declarations
;
1249 p
->temp_flag
= ~0x0 << I915_MAX_TEMPORARY
;
1250 p
->utemp_flag
= ~0x7;
1252 /* initialize the first program word */
1253 *(p
->decl
++) = _3DSTATE_PIXEL_SHADER_PROGRAM
;
1259 /* Copy compile results to the fragment program struct and destroy the
1260 * compilation context.
1263 i915_fini_compile(struct i915_context
*i915
, struct i915_fp_compile
*p
)
1265 struct i915_fragment_shader
*ifs
= p
->shader
;
1266 unsigned long program_size
= (unsigned long) (p
->csr
- p
->program
);
1267 unsigned long decl_size
= (unsigned long) (p
->decl
- p
->declarations
);
1269 if (p
->nr_tex_indirect
> I915_MAX_TEX_INDIRECT
)
1270 debug_printf("Exceeded max nr indirect texture lookups\n");
1272 if (p
->nr_tex_insn
> I915_MAX_TEX_INSN
)
1273 i915_program_error(p
, "Exceeded max TEX instructions");
1275 if (p
->nr_alu_insn
> I915_MAX_ALU_INSN
)
1276 i915_program_error(p
, "Exceeded max ALU instructions");
1278 if (p
->nr_decl_insn
> I915_MAX_DECL_INSN
)
1279 i915_program_error(p
, "Exceeded max DECL instructions");
1282 p
->NumNativeInstructions
= 0;
1283 p
->NumNativeAluInstructions
= 0;
1284 p
->NumNativeTexInstructions
= 0;
1285 p
->NumNativeTexIndirections
= 0;
1287 i915_use_passthrough_shader(ifs
);
1290 p
->NumNativeInstructions
1291 = p
->nr_alu_insn
+ p
->nr_tex_insn
+ p
->nr_decl_insn
;
1292 p
->NumNativeAluInstructions
= p
->nr_alu_insn
;
1293 p
->NumNativeTexInstructions
= p
->nr_tex_insn
;
1294 p
->NumNativeTexIndirections
= p
->nr_tex_indirect
;
1296 /* patch in the program length */
1297 p
->declarations
[0] |= program_size
+ decl_size
- 2;
1299 /* Copy compilation results to fragment program struct:
1302 assert(!ifs
->program
);
1305 = (uint
*) MALLOC(decl_size
* sizeof(uint
));
1307 = (uint
*) MALLOC(program_size
* sizeof(uint
));
1310 ifs
->decl_len
= decl_size
;
1314 decl_size
* sizeof(uint
));
1318 ifs
->program_len
= program_size
;
1320 memcpy(ifs
->program
,
1322 program_size
* sizeof(uint
));
1326 /* Release the compilation struct:
1336 * Rather than trying to intercept and jiggle depth writes during
1337 * emit, just move the value into its correct position at the end of
1341 i915_fixup_depth_write(struct i915_fp_compile
*p
)
1343 /* XXX assuming pos/depth is always in output[0] */
1344 if (p
->shader
->info
.output_semantic_name
[0] == TGSI_SEMANTIC_POSITION
) {
1345 const uint depth
= UREG(REG_TYPE_OD
, 0);
1348 A0_MOV
, /* opcode */
1349 depth
, /* dest reg */
1350 A0_DEST_CHANNEL_W
, /* write mask */
1352 swizzle(depth
, X
, Y
, Z
, Z
), /* src0 */
1353 0, 0 /* src1, src2 */);
1359 i915_translate_fragment_program( struct i915_context
*i915
,
1360 struct i915_fragment_shader
*fs
)
1362 struct i915_fp_compile
*p
;
1363 const struct tgsi_token
*tokens
= fs
->state
.tokens
;
1364 struct i915_token_list
* i_tokens
;
1367 tgsi_dump(tokens
, 0);
1370 /* hw doesn't seem to like empty frag programs, even when the depth write
1371 * fixup gets emitted below - may that one is fishy, too? */
1372 if (fs
->info
.num_instructions
== 1) {
1373 i915_use_passthrough_shader(fs
);
1378 p
= i915_init_compile(i915
, fs
);
1380 i_tokens
= i915_optimize(tokens
);
1381 i915_translate_instructions(p
, i_tokens
, fs
);
1382 i915_fixup_depth_write(p
);
1384 i915_fini_compile(i915
, p
);
1385 i915_optimize_free(i_tokens
);
1388 i915_disassemble_program(NULL
, fs
->program
, fs
->program_len
);