2 Copyright (C) Intel Corp. 2006. All Rights Reserved.
3 Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
4 develop this 3D driver.
6 Permission is hereby granted, free of charge, to any person obtaining
7 a 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, sublicense, 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
16 portions of the Software.
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **********************************************************************/
29 * Keith Whitwell <keith@tungstengraphics.com>
33 #include "main/glheader.h"
34 #include "main/macros.h"
35 #include "main/enums.h"
36 #include "brw_context.h"
40 #include "program/prog_parameter.h"
41 #include "program/prog_print.h"
42 #include "program/prog_statevars.h"
45 /** An invalid texture target */
46 #define TEX_TARGET_NONE NUM_TEXTURE_TARGETS
48 /** An invalid texture unit */
49 #define TEX_UNIT_NONE BRW_MAX_TEX_UNIT
51 #define FIRST_INTERNAL_TEMP MAX_NV_FRAGMENT_PROGRAM_TEMPS
59 static const char *wm_opcode_strings
[] = {
72 static const char *wm_file_strings
[] = {
78 /***********************************************************************
82 static struct prog_src_register
src_reg(GLuint file
, GLuint idx
)
84 struct prog_src_register reg
;
87 reg
.Swizzle
= SWIZZLE_NOOP
;
89 reg
.Negate
= NEGATE_NONE
;
97 static struct prog_src_register
src_reg_from_dst(struct prog_dst_register dst
)
99 return src_reg(dst
.File
, dst
.Index
);
102 static struct prog_src_register
src_undef( void )
104 return src_reg(PROGRAM_UNDEFINED
, 0);
107 static bool src_is_undef(struct prog_src_register src
)
109 return src
.File
== PROGRAM_UNDEFINED
;
112 static struct prog_src_register
src_swizzle( struct prog_src_register reg
, int x
, int y
, int z
, int w
)
114 reg
.Swizzle
= MAKE_SWIZZLE4(x
,y
,z
,w
);
118 static struct prog_src_register
src_swizzle1( struct prog_src_register reg
, int x
)
120 return src_swizzle(reg
, x
, x
, x
, x
);
123 static struct prog_src_register
src_swizzle4( struct prog_src_register reg
, uint swizzle
)
125 reg
.Swizzle
= swizzle
;
130 /***********************************************************************
134 static struct prog_dst_register
dst_reg(GLuint file
, GLuint idx
)
136 struct prog_dst_register reg
;
139 reg
.WriteMask
= WRITEMASK_XYZW
;
141 reg
.CondMask
= COND_TR
;
147 static struct prog_dst_register
dst_mask( struct prog_dst_register reg
, int mask
)
149 reg
.WriteMask
&= mask
;
153 static struct prog_dst_register
dst_undef( void )
155 return dst_reg(PROGRAM_UNDEFINED
, 0);
160 static struct prog_dst_register
get_temp( struct brw_wm_compile
*c
)
162 int bit
= _mesa_ffs( ~c
->fp_temp
);
165 printf("%s: out of temporaries\n", __FILE__
);
169 c
->fp_temp
|= 1<<(bit
-1);
170 return dst_reg(PROGRAM_TEMPORARY
, FIRST_INTERNAL_TEMP
+(bit
-1));
174 static void release_temp( struct brw_wm_compile
*c
, struct prog_dst_register temp
)
176 c
->fp_temp
&= ~(1 << (temp
.Index
- FIRST_INTERNAL_TEMP
));
180 /***********************************************************************
184 static struct prog_instruction
*get_fp_inst(struct brw_wm_compile
*c
)
186 assert(c
->nr_fp_insns
< BRW_WM_MAX_INSN
);
187 memset(&c
->prog_instructions
[c
->nr_fp_insns
], 0,
188 sizeof(*c
->prog_instructions
));
189 return &c
->prog_instructions
[c
->nr_fp_insns
++];
192 static struct prog_instruction
*emit_insn(struct brw_wm_compile
*c
,
193 const struct prog_instruction
*inst0
)
195 struct prog_instruction
*inst
= get_fp_inst(c
);
200 static struct prog_instruction
* emit_tex_op(struct brw_wm_compile
*c
,
202 struct prog_dst_register dest
,
205 GLuint tex_src_target
,
207 struct prog_src_register src0
,
208 struct prog_src_register src1
,
209 struct prog_src_register src2
)
211 struct prog_instruction
*inst
= get_fp_inst(c
);
213 assert(tex_src_unit
< BRW_MAX_TEX_UNIT
||
214 tex_src_unit
== TEX_UNIT_NONE
);
215 assert(tex_src_target
< NUM_TEXTURE_TARGETS
||
216 tex_src_target
== TEX_TARGET_NONE
);
218 memset(inst
, 0, sizeof(*inst
));
222 inst
->SaturateMode
= saturate
;
223 inst
->TexSrcUnit
= tex_src_unit
;
224 inst
->TexSrcTarget
= tex_src_target
;
225 inst
->TexShadow
= tex_shadow
;
226 inst
->SrcReg
[0] = src0
;
227 inst
->SrcReg
[1] = src1
;
228 inst
->SrcReg
[2] = src2
;
233 static struct prog_instruction
* emit_op(struct brw_wm_compile
*c
,
235 struct prog_dst_register dest
,
237 struct prog_src_register src0
,
238 struct prog_src_register src1
,
239 struct prog_src_register src2
)
241 return emit_tex_op(c
, op
, dest
, saturate
,
242 TEX_UNIT_NONE
, TEX_TARGET_NONE
, 0, /* unit, tgt, shadow */
247 /* Many Mesa opcodes produce the same value across all the result channels.
248 * We'd rather not have to support that splatting in the opcode implementations,
249 * and brw_wm_pass*.c wants to optimize them out by shuffling references around
250 * anyway. We can easily get both by emitting the opcode to one channel, and
251 * then MOVing it to the others, which brw_wm_pass*.c already understands.
253 static struct prog_instruction
*emit_scalar_insn(struct brw_wm_compile
*c
,
254 const struct prog_instruction
*inst0
)
256 struct prog_instruction
*inst
;
257 unsigned int dst_chan
;
258 unsigned int other_channel_mask
;
260 if (inst0
->DstReg
.WriteMask
== 0)
263 dst_chan
= _mesa_ffs(inst0
->DstReg
.WriteMask
) - 1;
264 inst
= get_fp_inst(c
);
266 inst
->DstReg
.WriteMask
= 1 << dst_chan
;
268 other_channel_mask
= inst0
->DstReg
.WriteMask
& ~(1 << dst_chan
);
269 if (other_channel_mask
!= 0) {
272 dst_mask(inst0
->DstReg
, other_channel_mask
),
274 src_swizzle1(src_reg_from_dst(inst0
->DstReg
), dst_chan
),
282 /***********************************************************************
283 * Special instructions for interpolation and other tasks
286 static struct prog_src_register
get_pixel_xy( struct brw_wm_compile
*c
)
288 if (src_is_undef(c
->pixel_xy
)) {
289 struct prog_dst_register pixel_xy
= get_temp(c
);
290 struct prog_src_register payload_r0_depth
= src_reg(PROGRAM_PAYLOAD
, PAYLOAD_DEPTH
);
293 /* Emit the out calculations, and hold onto the results. Use
294 * two instructions as a temporary is required.
296 /* pixel_xy.xy = PIXELXY payload[0];
300 dst_mask(pixel_xy
, WRITEMASK_XY
),
306 c
->pixel_xy
= src_reg_from_dst(pixel_xy
);
312 static struct prog_src_register
get_delta_xy( struct brw_wm_compile
*c
)
314 if (src_is_undef(c
->delta_xy
)) {
315 struct prog_dst_register delta_xy
= get_temp(c
);
316 struct prog_src_register pixel_xy
= get_pixel_xy(c
);
317 struct prog_src_register payload_r0_depth
= src_reg(PROGRAM_PAYLOAD
, PAYLOAD_DEPTH
);
319 /* deltas.xy = DELTAXY pixel_xy, payload[0]
323 dst_mask(delta_xy
, WRITEMASK_XY
),
329 c
->delta_xy
= src_reg_from_dst(delta_xy
);
335 static struct prog_src_register
get_pixel_w( struct brw_wm_compile
*c
)
337 /* This is called for producing 1/w in pre-gen6 interp. for gen6,
338 * the interp opcodes don't use this argument. But to keep the
339 * nr_args = 3 expectations of pinterp happy, just stuff delta_xy
342 if (c
->func
.brw
->intel
.gen
>= 6)
345 if (src_is_undef(c
->pixel_w
)) {
346 struct prog_dst_register pixel_w
= get_temp(c
);
347 struct prog_src_register deltas
= get_delta_xy(c
);
348 struct prog_src_register interp_wpos
= src_reg(PROGRAM_PAYLOAD
, FRAG_ATTRIB_WPOS
);
350 /* deltas.xyw = DELTAS2 deltas.xy, payload.interp_wpos.x
354 dst_mask(pixel_w
, WRITEMASK_W
),
361 c
->pixel_w
= src_reg_from_dst(pixel_w
);
367 static void emit_interp( struct brw_wm_compile
*c
,
370 struct prog_dst_register dst
= dst_reg(PROGRAM_INPUT
, idx
);
371 struct prog_src_register interp
= src_reg(PROGRAM_PAYLOAD
, idx
);
372 struct prog_src_register deltas
;
374 deltas
= get_delta_xy(c
);
376 /* Need to use PINTERP on attributes which have been
377 * multiplied by 1/W in the SF program, and LINTERP on those
381 case FRAG_ATTRIB_WPOS
:
382 /* Have to treat wpos.xy specially:
386 dst_mask(dst
, WRITEMASK_XY
),
392 dst
= dst_mask(dst
, WRITEMASK_ZW
);
394 /* PROGRAM_INPUT.attr.xyzw = INTERP payload.interp[attr].x, deltas.xyw
404 case FRAG_ATTRIB_COL0
:
405 case FRAG_ATTRIB_COL1
:
406 if (c
->key
.flat_shade
) {
416 /* perspective-corrected color interpolation */
426 case FRAG_ATTRIB_FOGC
:
427 /* Interpolate the fog coordinate */
430 dst_mask(dst
, WRITEMASK_X
),
438 dst_mask(dst
, WRITEMASK_YZW
),
449 case FRAG_ATTRIB_FACE
:
452 dst_mask(dst
, WRITEMASK_X
),
459 case FRAG_ATTRIB_PNTC
:
460 /* XXX review/test this case */
463 dst_mask(dst
, WRITEMASK_XY
),
471 dst_mask(dst
, WRITEMASK_ZW
),
493 c
->fp_interp_emitted
|= 1<<idx
;
496 /***********************************************************************
497 * Hacks to extend the program parameter and constant lists.
500 /* Add the fog parameters to the parameter list of the original
501 * program, rather than creating a new list. Doesn't really do any
502 * harm and it's not as if the parameter handling isn't a big hack
505 static struct prog_src_register
search_or_add_param5(struct brw_wm_compile
*c
,
512 struct gl_program_parameter_list
*paramList
= c
->fp
->program
.Base
.Parameters
;
513 gl_state_index tokens
[STATE_LENGTH
];
521 idx
= _mesa_add_state_reference( paramList
, tokens
);
523 return src_reg(PROGRAM_STATE_VAR
, idx
);
527 static struct prog_src_register
search_or_add_const4f( struct brw_wm_compile
*c
,
533 struct gl_program_parameter_list
*paramList
= c
->fp
->program
.Base
.Parameters
;
534 gl_constant_value values
[4];
537 struct prog_src_register reg
;
544 idx
= _mesa_add_unnamed_constant( paramList
, values
, 4, &swizzle
);
545 reg
= src_reg(PROGRAM_STATE_VAR
, idx
);
546 reg
.Swizzle
= swizzle
;
553 /***********************************************************************
554 * Expand various instructions here to simpler forms.
556 static void precalc_dst( struct brw_wm_compile
*c
,
557 const struct prog_instruction
*inst
)
559 struct prog_src_register src0
= inst
->SrcReg
[0];
560 struct prog_src_register src1
= inst
->SrcReg
[1];
561 struct prog_dst_register dst
= inst
->DstReg
;
562 struct prog_dst_register temp
= get_temp(c
);
564 if (dst
.WriteMask
& WRITEMASK_Y
) {
565 /* dst.y = mul src0.y, src1.y
569 dst_mask(temp
, WRITEMASK_Y
),
576 if (dst
.WriteMask
& WRITEMASK_XZ
) {
577 struct prog_instruction
*swz
;
578 GLuint z
= GET_SWZ(src0
.Swizzle
, Z
);
580 /* dst.xz = swz src0.1zzz
584 dst_mask(temp
, WRITEMASK_XZ
),
586 src_swizzle(src0
, SWIZZLE_ONE
, z
, z
, z
),
589 /* Avoid letting negation flag of src0 affect our 1 constant. */
590 swz
->SrcReg
[0].Negate
&= ~NEGATE_X
;
592 if (dst
.WriteMask
& WRITEMASK_W
) {
593 /* dst.w = mov src1.w
597 dst_mask(temp
, WRITEMASK_W
),
604 /* This will get optimized out in general, but it ensures that we
605 * don't overwrite src operands in our channel-wise splitting
606 * above. See piglit fp-dst-aliasing-[12].
612 src_reg_from_dst(temp
),
616 release_temp(c
, temp
);
620 static void precalc_lit( struct brw_wm_compile
*c
,
621 const struct prog_instruction
*inst
)
623 struct prog_src_register src0
= inst
->SrcReg
[0];
624 struct prog_dst_register dst
= inst
->DstReg
;
626 if (dst
.WriteMask
& WRITEMASK_YZ
) {
629 dst_mask(dst
, WRITEMASK_YZ
),
636 if (dst
.WriteMask
& WRITEMASK_XW
) {
637 struct prog_instruction
*swz
;
639 /* dst.xw = swz src0.1111
643 dst_mask(dst
, WRITEMASK_XW
),
645 src_swizzle1(src0
, SWIZZLE_ONE
),
648 /* Avoid letting the negation flag of src0 affect our 1 constant. */
649 swz
->SrcReg
[0].Negate
= NEGATE_NONE
;
655 * Some TEX instructions require extra code, cube map coordinate
656 * normalization, or coordinate scaling for RECT textures, etc.
657 * This function emits those extra instructions and the TEX
658 * instruction itself.
660 static void precalc_tex( struct brw_wm_compile
*c
,
661 const struct prog_instruction
*inst
)
663 struct brw_compile
*p
= &c
->func
;
664 struct intel_context
*intel
= &p
->brw
->intel
;
665 struct prog_src_register coord
;
666 struct prog_dst_register tmpcoord
= { 0 };
667 const GLuint unit
= c
->fp
->program
.Base
.SamplerUnits
[inst
->TexSrcUnit
];
669 assert(unit
< BRW_MAX_TEX_UNIT
);
671 if (inst
->TexSrcTarget
== TEXTURE_CUBE_INDEX
) {
672 struct prog_instruction
*out
;
673 struct prog_dst_register tmp0
= get_temp(c
);
674 struct prog_src_register tmp0src
= src_reg_from_dst(tmp0
);
675 struct prog_dst_register tmp1
= get_temp(c
);
676 struct prog_src_register tmp1src
= src_reg_from_dst(tmp1
);
677 struct prog_src_register src0
= inst
->SrcReg
[0];
679 /* find longest component of coord vector and normalize it */
680 tmpcoord
= get_temp(c
);
681 coord
= src_reg_from_dst(tmpcoord
);
683 /* tmpcoord = src0 (i.e.: coord = src0) */
684 out
= emit_op(c
, OPCODE_MOV
,
690 out
->SrcReg
[0].Negate
= NEGATE_NONE
;
691 out
->SrcReg
[0].Abs
= 1;
693 /* tmp0 = MAX(coord.X, coord.Y) */
694 emit_op(c
, OPCODE_MAX
,
697 src_swizzle1(coord
, X
),
698 src_swizzle1(coord
, Y
),
701 /* tmp1 = MAX(tmp0, coord.Z) */
702 emit_op(c
, OPCODE_MAX
,
706 src_swizzle1(coord
, Z
),
709 /* tmp0 = 1 / tmp1 */
710 emit_op(c
, OPCODE_RCP
,
711 dst_mask(tmp0
, WRITEMASK_X
),
717 /* tmpCoord = src0 * tmp0 */
718 emit_op(c
, OPCODE_MUL
,
722 src_swizzle1(tmp0src
, SWIZZLE_X
),
725 release_temp(c
, tmp0
);
726 release_temp(c
, tmp1
);
728 else if (intel
->gen
< 6 && inst
->TexSrcTarget
== TEXTURE_RECT_INDEX
) {
729 struct prog_src_register scale
=
730 search_or_add_param5( c
,
736 tmpcoord
= get_temp(c
);
738 /* coord.xy = MUL inst->SrcReg[0], { 1/width, 1/height }
752 coord
= src_reg_from_dst(tmpcoord
);
755 coord
= inst
->SrcReg
[0];
758 /* Need to emit YUV texture conversions by hand. Probably need to
759 * do this here - the alternative is in brw_wm_emit.c, but the
760 * conversion requires allocating a temporary variable which we
761 * don't have the facility to do that late in the compilation.
763 if (c
->key
.yuvtex_mask
& (1 << unit
)) {
764 /* convert ycbcr to RGBA */
765 bool swap_uv
= c
->key
.yuvtex_swap_mask
& (1<<unit
);
768 CONST C0 = { -.5, -.0625, -.5, 1.164 }
769 CONST C1 = { 1.596, -0.813, 2.018, -.391 }
771 UYV.xyz = ADD UYV, C0
772 UYV.y = MUL UYV.y, C0.w
774 RGB.xyz = MAD UYV.zzx, C1, UYV.y
776 RGB.xyz = MAD UYV.xxz, C1, UYV.y
777 RGB.y = MAD UYV.z, C1.w, RGB.y
779 struct prog_dst_register dst
= inst
->DstReg
;
780 struct prog_dst_register tmp
= get_temp(c
);
781 struct prog_src_register tmpsrc
= src_reg_from_dst(tmp
);
782 struct prog_src_register C0
= search_or_add_const4f( c
, -.5, -.0625, -.5, 1.164 );
783 struct prog_src_register C1
= search_or_add_const4f( c
, 1.596, -0.813, 2.018, -.391 );
798 /* tmp.xyz = ADD TMP, C0
802 dst_mask(tmp
, WRITEMASK_XYZ
),
808 /* YUV.y = MUL YUV.y, C0.w
813 dst_mask(tmp
, WRITEMASK_Y
),
821 * RGB.xyz = MAD YUV.zzx, C1, YUV.y
823 * RGB.xyz = MAD YUV.xxz, C1, YUV.y
828 dst_mask(dst
, WRITEMASK_XYZ
),
830 swap_uv
?src_swizzle(tmpsrc
, Z
,Z
,X
,X
):src_swizzle(tmpsrc
, X
,X
,Z
,Z
),
832 src_swizzle1(tmpsrc
, Y
));
834 /* RGB.y = MAD YUV.z, C1.w, RGB.y
838 dst_mask(dst
, WRITEMASK_Y
),
840 src_swizzle1(tmpsrc
, Z
),
842 src_swizzle1(src_reg_from_dst(dst
), Y
));
844 release_temp(c
, tmp
);
847 /* ordinary RGBA tex instruction */
860 /* For GL_EXT_texture_swizzle: */
861 if (c
->key
.tex_swizzles
[unit
] != SWIZZLE_NOOP
) {
862 /* swizzle the result of the TEX instruction */
863 struct prog_src_register tmpsrc
= src_reg_from_dst(inst
->DstReg
);
864 emit_op(c
, OPCODE_SWZ
,
866 SATURATE_OFF
, /* saturate already done above */
867 src_swizzle4(tmpsrc
, c
->key
.tex_swizzles
[unit
]),
872 if ((inst
->TexSrcTarget
== TEXTURE_RECT_INDEX
) ||
873 (inst
->TexSrcTarget
== TEXTURE_CUBE_INDEX
))
874 release_temp(c
, tmpcoord
);
879 * Check if the given TXP instruction really needs the divide-by-W step.
882 projtex(struct brw_wm_compile
*c
, const struct prog_instruction
*inst
)
884 const struct prog_src_register src
= inst
->SrcReg
[0];
887 assert(inst
->Opcode
== OPCODE_TXP
);
889 /* Only try to detect the simplest cases. Could detect (later)
890 * cases where we are trying to emit code like RCP {1.0}, MUL x,
893 * More complex cases than this typically only arise from
894 * user-provided fragment programs anyway:
896 if (inst
->TexSrcTarget
== TEXTURE_CUBE_INDEX
)
897 retVal
= false; /* ut2004 gun rendering !?! */
898 else if (src
.File
== PROGRAM_INPUT
&&
899 GET_SWZ(src
.Swizzle
, W
) == W
&&
900 (c
->key
.proj_attrib_mask
& (1 << src
.Index
)) == 0)
912 static void precalc_txp( struct brw_wm_compile
*c
,
913 const struct prog_instruction
*inst
)
915 struct prog_src_register src0
= inst
->SrcReg
[0];
917 if (projtex(c
, inst
)) {
918 struct prog_dst_register tmp
= get_temp(c
);
919 struct prog_instruction tmp_inst
;
921 /* tmp0.w = RCP inst.arg[0][3]
925 dst_mask(tmp
, WRITEMASK_W
),
927 src_swizzle1(src0
, GET_SWZ(src0
.Swizzle
, W
)),
931 /* tmp0.xyz = MUL inst.arg[0], tmp0.wwww
935 dst_mask(tmp
, WRITEMASK_XYZ
),
938 src_swizzle1(src_reg_from_dst(tmp
), W
),
941 /* dst = precalc(TEX tmp0)
944 tmp_inst
.SrcReg
[0] = src_reg_from_dst(tmp
);
945 precalc_tex(c
, &tmp_inst
);
947 release_temp(c
, tmp
);
951 /* dst = precalc(TEX src0)
953 precalc_tex(c
, inst
);
959 static void emit_render_target_writes( struct brw_wm_compile
*c
)
961 struct prog_src_register payload_r0_depth
= src_reg(PROGRAM_PAYLOAD
, PAYLOAD_DEPTH
);
962 struct prog_src_register outdepth
= src_reg(PROGRAM_OUTPUT
, FRAG_RESULT_DEPTH
);
963 struct prog_src_register outcolor
;
966 struct prog_instruction
*inst
= NULL
;
968 /* The inst->Aux field is used for FB write target and the EOT marker */
970 for (i
= 0; i
< c
->key
.nr_color_regions
; i
++) {
971 if (c
->fp
->program
.Base
.OutputsWritten
& (1 << FRAG_RESULT_COLOR
)) {
972 outcolor
= src_reg(PROGRAM_OUTPUT
, FRAG_RESULT_COLOR
);
974 outcolor
= src_reg(PROGRAM_OUTPUT
, FRAG_RESULT_DATA0
+ i
);
976 inst
= emit_op(c
, WM_FB_WRITE
, dst_mask(dst_undef(), 0),
977 0, outcolor
, payload_r0_depth
, outdepth
);
978 inst
->Aux
= INST_AUX_TARGET(i
);
981 /* Mark the last FB write as final, or emit a dummy write if we had
982 * no render targets bound.
984 if (c
->key
.nr_color_regions
!= 0) {
985 inst
->Aux
|= INST_AUX_EOT
;
987 inst
= emit_op(c
, WM_FB_WRITE
, dst_mask(dst_undef(), 0),
988 0, src_reg(PROGRAM_OUTPUT
, FRAG_RESULT_COLOR
),
989 payload_r0_depth
, outdepth
);
990 inst
->Aux
= INST_AUX_TARGET(0) | INST_AUX_EOT
;
997 /***********************************************************************
998 * Emit INTERP instructions ahead of first use of each attrib.
1001 static void validate_src_regs( struct brw_wm_compile
*c
,
1002 const struct prog_instruction
*inst
)
1004 GLuint nr_args
= brw_wm_nr_args( inst
->Opcode
);
1007 for (i
= 0; i
< nr_args
; i
++) {
1008 if (inst
->SrcReg
[i
].File
== PROGRAM_INPUT
) {
1009 GLuint idx
= inst
->SrcReg
[i
].Index
;
1010 if (!(c
->fp_interp_emitted
& (1<<idx
))) {
1011 emit_interp(c
, idx
);
1017 static void print_insns( const struct prog_instruction
*insn
,
1021 for (i
= 0; i
< nr
; i
++, insn
++) {
1023 if (insn
->Opcode
< MAX_OPCODE
)
1024 _mesa_fprint_instruction_opt(stdout
, insn
, 0, PROG_PRINT_DEBUG
, NULL
);
1025 else if (insn
->Opcode
< MAX_WM_OPCODE
) {
1026 GLuint idx
= insn
->Opcode
- MAX_OPCODE
;
1028 _mesa_fprint_alu_instruction(stdout
, insn
, wm_opcode_strings
[idx
],
1029 3, PROG_PRINT_DEBUG
, NULL
);
1032 printf("965 Opcode %d\n", insn
->Opcode
);
1038 * Initial pass for fragment program code generation.
1039 * This function is used by both the GLSL and non-GLSL paths.
1041 void brw_wm_pass_fp( struct brw_wm_compile
*c
)
1043 struct intel_context
*intel
= &c
->func
.brw
->intel
;
1044 struct brw_fragment_program
*fp
= c
->fp
;
1047 if (unlikely(INTEL_DEBUG
& DEBUG_WM
)) {
1048 printf("pre-fp:\n");
1049 _mesa_fprint_program_opt(stdout
, &fp
->program
.Base
, PROG_PRINT_DEBUG
,
1054 c
->pixel_xy
= src_undef();
1055 if (intel
->gen
>= 6) {
1056 /* The interpolation deltas come in as the perspective pixel
1057 * location barycentric params.
1059 c
->delta_xy
= src_reg(PROGRAM_PAYLOAD
, PAYLOAD_DEPTH
);
1061 c
->delta_xy
= src_undef();
1063 c
->pixel_w
= src_undef();
1066 /* Emit preamble instructions. This is where special instructions such as
1067 * WM_CINTERP, WM_LINTERP, WM_PINTERP and WM_WPOSXY are emitted to
1068 * compute shader inputs from varying vars.
1070 for (insn
= 0; insn
< fp
->program
.Base
.NumInstructions
; insn
++) {
1071 const struct prog_instruction
*inst
= &fp
->program
.Base
.Instructions
[insn
];
1072 validate_src_regs(c
, inst
);
1075 /* Loop over all instructions doing assorted simplifications and
1078 for (insn
= 0; insn
< fp
->program
.Base
.NumInstructions
; insn
++) {
1079 const struct prog_instruction
*inst
= &fp
->program
.Base
.Instructions
[insn
];
1080 struct prog_instruction
*out
;
1082 /* Check for INPUT values, emit INTERP instructions where
1086 switch (inst
->Opcode
) {
1088 out
= emit_insn(c
, inst
);
1089 out
->Opcode
= OPCODE_MOV
;
1093 out
= emit_insn(c
, inst
);
1094 out
->Opcode
= OPCODE_MOV
;
1095 out
->SrcReg
[0].Negate
= NEGATE_NONE
;
1096 out
->SrcReg
[0].Abs
= 1;
1100 out
= emit_insn(c
, inst
);
1101 out
->Opcode
= OPCODE_ADD
;
1102 out
->SrcReg
[1].Negate
^= NEGATE_XYZW
;
1106 out
= emit_insn(c
, inst
);
1107 /* This should probably be done in the parser.
1109 out
->DstReg
.WriteMask
&= WRITEMASK_XY
;
1113 precalc_dst(c
, inst
);
1117 precalc_lit(c
, inst
);
1121 out
= emit_scalar_insn(c
, inst
);
1122 out
->SrcReg
[0].Abs
= true;
1126 precalc_tex(c
, inst
);
1130 precalc_txp(c
, inst
);
1134 out
= emit_insn(c
, inst
);
1135 out
->TexSrcUnit
= fp
->program
.Base
.SamplerUnits
[inst
->TexSrcUnit
];
1136 assert(out
->TexSrcUnit
< BRW_MAX_TEX_UNIT
);
1140 out
= emit_insn(c
, inst
);
1141 /* This should probably be done in the parser.
1143 out
->DstReg
.WriteMask
&= WRITEMASK_XYZ
;
1147 out
= emit_insn(c
, inst
);
1148 /* This should probably be done in the parser.
1150 out
->DstReg
.WriteMask
= 0;
1153 emit_render_target_writes(c
);
1158 if (brw_wm_is_scalar_result(inst
->Opcode
))
1159 emit_scalar_insn(c
, inst
);
1166 if (unlikely(INTEL_DEBUG
& DEBUG_WM
)) {
1167 printf("pass_fp:\n");
1168 print_insns( c
->prog_instructions
, c
->nr_fp_insns
);