2 Copyright (C) Intel Corp. 2006. All Rights Reserved.
3 Intel funded Tungsten Graphics 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 <keithw@vmware.com>
33 #include "brw_context.h"
34 #include "brw_defines.h"
37 #include "util/ralloc.h"
39 /***********************************************************************
40 * Internal helper for constructing instructions
43 static void guess_execution_size(struct brw_compile
*p
,
47 const struct brw_context
*brw
= p
->brw
;
49 if (reg
.width
== BRW_WIDTH_8
&& p
->compressed
) {
50 brw_inst_set_exec_size(brw
, insn
, BRW_EXECUTE_16
);
52 /* Register width definitions are compatible with BRW_EXECUTE_* enums. */
53 brw_inst_set_exec_size(brw
, insn
, reg
.width
);
59 * Prior to Sandybridge, the SEND instruction accepted non-MRF source
60 * registers, implicitly moving the operand to a message register.
62 * On Sandybridge, this is no longer the case. This function performs the
63 * explicit move; it should be called before emitting a SEND instruction.
66 gen6_resolve_implied_move(struct brw_compile
*p
,
70 struct brw_context
*brw
= p
->brw
;
74 if (src
->file
== BRW_MESSAGE_REGISTER_FILE
)
77 if (src
->file
!= BRW_ARCHITECTURE_REGISTER_FILE
|| src
->nr
!= BRW_ARF_NULL
) {
78 brw_push_insn_state(p
);
79 brw_set_default_mask_control(p
, BRW_MASK_DISABLE
);
80 brw_set_default_compression_control(p
, BRW_COMPRESSION_NONE
);
81 brw_MOV(p
, retype(brw_message_reg(msg_reg_nr
), BRW_REGISTER_TYPE_UD
),
82 retype(*src
, BRW_REGISTER_TYPE_UD
));
83 brw_pop_insn_state(p
);
85 *src
= brw_message_reg(msg_reg_nr
);
89 gen7_convert_mrf_to_grf(struct brw_compile
*p
, struct brw_reg
*reg
)
91 /* From the Ivybridge PRM, Volume 4 Part 3, page 218 ("send"):
92 * "The send with EOT should use register space R112-R127 for <src>. This is
93 * to enable loading of a new thread into the same slot while the message
94 * with EOT for current thread is pending dispatch."
96 * Since we're pretending to have 16 MRFs anyway, we may as well use the
97 * registers required for messages with EOT.
99 struct brw_context
*brw
= p
->brw
;
100 if (brw
->gen
>= 7 && reg
->file
== BRW_MESSAGE_REGISTER_FILE
) {
101 reg
->file
= BRW_GENERAL_REGISTER_FILE
;
102 reg
->nr
+= GEN7_MRF_HACK_START
;
107 * Convert a brw_reg_type enumeration value into the hardware representation.
109 * The hardware encoding may depend on whether the value is an immediate.
112 brw_reg_type_to_hw_type(const struct brw_context
*brw
,
113 enum brw_reg_type type
, unsigned file
)
115 if (file
== BRW_IMMEDIATE_VALUE
) {
116 const static int imm_hw_types
[] = {
117 [BRW_REGISTER_TYPE_UD
] = BRW_HW_REG_TYPE_UD
,
118 [BRW_REGISTER_TYPE_D
] = BRW_HW_REG_TYPE_D
,
119 [BRW_REGISTER_TYPE_UW
] = BRW_HW_REG_TYPE_UW
,
120 [BRW_REGISTER_TYPE_W
] = BRW_HW_REG_TYPE_W
,
121 [BRW_REGISTER_TYPE_F
] = BRW_HW_REG_TYPE_F
,
122 [BRW_REGISTER_TYPE_UB
] = -1,
123 [BRW_REGISTER_TYPE_B
] = -1,
124 [BRW_REGISTER_TYPE_UV
] = BRW_HW_REG_IMM_TYPE_UV
,
125 [BRW_REGISTER_TYPE_VF
] = BRW_HW_REG_IMM_TYPE_VF
,
126 [BRW_REGISTER_TYPE_V
] = BRW_HW_REG_IMM_TYPE_V
,
127 [BRW_REGISTER_TYPE_DF
] = GEN8_HW_REG_IMM_TYPE_DF
,
128 [BRW_REGISTER_TYPE_HF
] = GEN8_HW_REG_IMM_TYPE_HF
,
129 [BRW_REGISTER_TYPE_UQ
] = GEN8_HW_REG_TYPE_UQ
,
130 [BRW_REGISTER_TYPE_Q
] = GEN8_HW_REG_TYPE_Q
,
132 assert(type
< ARRAY_SIZE(imm_hw_types
));
133 assert(imm_hw_types
[type
] != -1);
134 assert(brw
->gen
>= 8 || type
< BRW_REGISTER_TYPE_DF
);
135 return imm_hw_types
[type
];
137 /* Non-immediate registers */
138 const static int hw_types
[] = {
139 [BRW_REGISTER_TYPE_UD
] = BRW_HW_REG_TYPE_UD
,
140 [BRW_REGISTER_TYPE_D
] = BRW_HW_REG_TYPE_D
,
141 [BRW_REGISTER_TYPE_UW
] = BRW_HW_REG_TYPE_UW
,
142 [BRW_REGISTER_TYPE_W
] = BRW_HW_REG_TYPE_W
,
143 [BRW_REGISTER_TYPE_UB
] = BRW_HW_REG_NON_IMM_TYPE_UB
,
144 [BRW_REGISTER_TYPE_B
] = BRW_HW_REG_NON_IMM_TYPE_B
,
145 [BRW_REGISTER_TYPE_F
] = BRW_HW_REG_TYPE_F
,
146 [BRW_REGISTER_TYPE_UV
] = -1,
147 [BRW_REGISTER_TYPE_VF
] = -1,
148 [BRW_REGISTER_TYPE_V
] = -1,
149 [BRW_REGISTER_TYPE_DF
] = GEN7_HW_REG_NON_IMM_TYPE_DF
,
150 [BRW_REGISTER_TYPE_HF
] = GEN8_HW_REG_NON_IMM_TYPE_HF
,
151 [BRW_REGISTER_TYPE_UQ
] = GEN8_HW_REG_TYPE_UQ
,
152 [BRW_REGISTER_TYPE_Q
] = GEN8_HW_REG_TYPE_Q
,
154 assert(type
< ARRAY_SIZE(hw_types
));
155 assert(hw_types
[type
] != -1);
156 assert(brw
->gen
>= 7 || type
< BRW_REGISTER_TYPE_DF
);
157 assert(brw
->gen
>= 8 || type
< BRW_REGISTER_TYPE_HF
);
158 return hw_types
[type
];
163 brw_set_dest(struct brw_compile
*p
, brw_inst
*inst
, struct brw_reg dest
)
165 const struct brw_context
*brw
= p
->brw
;
167 if (dest
.file
!= BRW_ARCHITECTURE_REGISTER_FILE
&&
168 dest
.file
!= BRW_MESSAGE_REGISTER_FILE
)
169 assert(dest
.nr
< 128);
171 gen7_convert_mrf_to_grf(p
, &dest
);
173 brw_inst_set_dst_reg_file(brw
, inst
, dest
.file
);
174 brw_inst_set_dst_reg_type(brw
, inst
, brw_reg_type_to_hw_type(brw
, dest
.type
,
176 brw_inst_set_dst_address_mode(brw
, inst
, dest
.address_mode
);
178 if (dest
.address_mode
== BRW_ADDRESS_DIRECT
) {
179 brw_inst_set_dst_da_reg_nr(brw
, inst
, dest
.nr
);
181 if (brw_inst_access_mode(brw
, inst
) == BRW_ALIGN_1
) {
182 brw_inst_set_dst_da1_subreg_nr(brw
, inst
, dest
.subnr
);
183 if (dest
.hstride
== BRW_HORIZONTAL_STRIDE_0
)
184 dest
.hstride
= BRW_HORIZONTAL_STRIDE_1
;
185 brw_inst_set_dst_hstride(brw
, inst
, dest
.hstride
);
187 brw_inst_set_dst_da16_subreg_nr(brw
, inst
, dest
.subnr
/ 16);
188 brw_inst_set_da16_writemask(brw
, inst
, dest
.dw1
.bits
.writemask
);
189 if (dest
.file
== BRW_GENERAL_REGISTER_FILE
||
190 dest
.file
== BRW_MESSAGE_REGISTER_FILE
) {
191 assert(dest
.dw1
.bits
.writemask
!= 0);
193 /* From the Ivybridge PRM, Vol 4, Part 3, Section 5.2.4.1:
194 * Although Dst.HorzStride is a don't care for Align16, HW needs
195 * this to be programmed as "01".
197 brw_inst_set_dst_hstride(brw
, inst
, 1);
200 brw_inst_set_dst_ia_subreg_nr(brw
, inst
, dest
.subnr
);
202 /* These are different sizes in align1 vs align16:
204 if (brw_inst_access_mode(brw
, inst
) == BRW_ALIGN_1
) {
205 brw_inst_set_dst_ia1_addr_imm(brw
, inst
,
206 dest
.dw1
.bits
.indirect_offset
);
207 if (dest
.hstride
== BRW_HORIZONTAL_STRIDE_0
)
208 dest
.hstride
= BRW_HORIZONTAL_STRIDE_1
;
209 brw_inst_set_dst_hstride(brw
, inst
, dest
.hstride
);
211 brw_inst_set_dst_ia16_addr_imm(brw
, inst
,
212 dest
.dw1
.bits
.indirect_offset
);
213 /* even ignored in da16, still need to set as '01' */
214 brw_inst_set_dst_hstride(brw
, inst
, 1);
218 /* NEW: Set the execution size based on dest.width and
219 * inst->compression_control:
221 guess_execution_size(p
, inst
, dest
);
224 extern int reg_type_size
[];
227 validate_reg(const struct brw_context
*brw
, brw_inst
*inst
, struct brw_reg reg
)
229 int hstride_for_reg
[] = {0, 1, 2, 4};
230 int vstride_for_reg
[] = {0, 1, 2, 4, 8, 16, 32, 64, 128, 256};
231 int width_for_reg
[] = {1, 2, 4, 8, 16};
232 int execsize_for_reg
[] = {1, 2, 4, 8, 16};
233 int width
, hstride
, vstride
, execsize
;
235 if (reg
.file
== BRW_IMMEDIATE_VALUE
) {
236 /* 3.3.6: Region Parameters. Restriction: Immediate vectors
237 * mean the destination has to be 128-bit aligned and the
238 * destination horiz stride has to be a word.
240 if (reg
.type
== BRW_REGISTER_TYPE_V
) {
241 assert(hstride_for_reg
[brw_inst_dst_hstride(brw
, inst
)] *
242 reg_type_size
[brw_inst_dst_reg_type(brw
, inst
)] == 2);
248 if (reg
.file
== BRW_ARCHITECTURE_REGISTER_FILE
&&
249 reg
.file
== BRW_ARF_NULL
)
252 assert(reg
.hstride
>= 0 && reg
.hstride
< Elements(hstride_for_reg
));
253 hstride
= hstride_for_reg
[reg
.hstride
];
255 if (reg
.vstride
== 0xf) {
258 assert(reg
.vstride
>= 0 && reg
.vstride
< Elements(vstride_for_reg
));
259 vstride
= vstride_for_reg
[reg
.vstride
];
262 assert(reg
.width
>= 0 && reg
.width
< Elements(width_for_reg
));
263 width
= width_for_reg
[reg
.width
];
265 assert(brw_inst_exec_size(brw
, inst
) >= 0 &&
266 brw_inst_exec_size(brw
, inst
) < Elements(execsize_for_reg
));
267 execsize
= execsize_for_reg
[brw_inst_exec_size(brw
, inst
)];
269 /* Restrictions from 3.3.10: Register Region Restrictions. */
271 assert(execsize
>= width
);
274 if (execsize
== width
&& hstride
!= 0) {
275 assert(vstride
== -1 || vstride
== width
* hstride
);
279 if (execsize
== width
&& hstride
== 0) {
280 /* no restriction on vstride. */
285 assert(hstride
== 0);
289 if (execsize
== 1 && width
== 1) {
290 assert(hstride
== 0);
291 assert(vstride
== 0);
295 if (vstride
== 0 && hstride
== 0) {
299 /* 10. Check destination issues. */
303 is_compactable_immediate(unsigned imm
)
305 /* We get the low 12 bits as-is. */
308 /* We get one bit replicated through the top 20 bits. */
309 return imm
== 0 || imm
== 0xfffff000;
313 brw_set_src0(struct brw_compile
*p
, brw_inst
*inst
, struct brw_reg reg
)
315 struct brw_context
*brw
= p
->brw
;
317 if (reg
.file
!= BRW_ARCHITECTURE_REGISTER_FILE
)
318 assert(reg
.nr
< 128);
320 gen7_convert_mrf_to_grf(p
, ®
);
322 if (brw
->gen
>= 6 && (brw_inst_opcode(brw
, inst
) == BRW_OPCODE_SEND
||
323 brw_inst_opcode(brw
, inst
) == BRW_OPCODE_SENDC
)) {
324 /* Any source modifiers or regions will be ignored, since this just
325 * identifies the MRF/GRF to start reading the message contents from.
326 * Check for some likely failures.
330 assert(reg
.address_mode
== BRW_ADDRESS_DIRECT
);
333 validate_reg(brw
, inst
, reg
);
335 brw_inst_set_src0_reg_file(brw
, inst
, reg
.file
);
336 brw_inst_set_src0_reg_type(brw
, inst
,
337 brw_reg_type_to_hw_type(brw
, reg
.type
, reg
.file
));
338 brw_inst_set_src0_abs(brw
, inst
, reg
.abs
);
339 brw_inst_set_src0_negate(brw
, inst
, reg
.negate
);
340 brw_inst_set_src0_address_mode(brw
, inst
, reg
.address_mode
);
342 if (reg
.file
== BRW_IMMEDIATE_VALUE
) {
343 brw_inst_set_imm_ud(brw
, inst
, reg
.dw1
.ud
);
345 /* The Bspec's section titled "Non-present Operands" claims that if src0
346 * is an immediate that src1's type must be the same as that of src0.
348 * The SNB+ DataTypeIndex instruction compaction tables contain mappings
349 * that do not follow this rule. E.g., from the IVB/HSW table:
351 * DataTypeIndex 18-Bit Mapping Mapped Meaning
352 * 3 001000001011111101 r:f | i:vf | a:ud | <1> | dir |
354 * And from the SNB table:
356 * DataTypeIndex 18-Bit Mapping Mapped Meaning
357 * 8 001000000111101100 a:w | i:w | a:ud | <1> | dir |
359 * Neither of these cause warnings from the simulator when used,
360 * compacted or otherwise. In fact, all compaction mappings that have an
361 * immediate in src0 use a:ud for src1.
363 * The GM45 instruction compaction tables do not contain mapped meanings
364 * so it's not clear whether it has the restriction. We'll assume it was
365 * lifted on SNB. (FINISHME: decode the GM45 tables and check.)
367 brw_inst_set_src1_reg_file(brw
, inst
, BRW_ARCHITECTURE_REGISTER_FILE
);
369 brw_inst_set_src1_reg_type(brw
, inst
,
370 brw_inst_src0_reg_type(brw
, inst
));
372 brw_inst_set_src1_reg_type(brw
, inst
, BRW_HW_REG_TYPE_UD
);
375 /* Compacted instructions only have 12-bits (plus 1 for the other 20)
376 * for immediate values. Presumably the hardware engineers realized
377 * that the only useful floating-point value that could be represented
378 * in this format is 0.0, which can also be represented as a VF-typed
379 * immediate, so they gave us the previously mentioned mapping on IVB+.
381 * Strangely, we do have a mapping for imm:f in src1, so we don't need
384 * If we see a 0.0:F, change the type to VF so that it can be compacted.
386 if (brw_inst_imm_ud(brw
, inst
) == 0x0 &&
387 brw_inst_src0_reg_type(brw
, inst
) == BRW_HW_REG_TYPE_F
) {
388 brw_inst_set_src0_reg_type(brw
, inst
, BRW_HW_REG_IMM_TYPE_VF
);
391 /* There are no mappings for dst:d | i:d, so if the immediate is suitable
392 * set the types to :UD so the instruction can be compacted.
394 if (is_compactable_immediate(brw_inst_imm_ud(brw
, inst
)) &&
395 brw_inst_cond_modifier(brw
, inst
) == BRW_CONDITIONAL_NONE
&&
396 brw_inst_src0_reg_type(brw
, inst
) == BRW_HW_REG_TYPE_D
&&
397 brw_inst_dst_reg_type(brw
, inst
) == BRW_HW_REG_TYPE_D
) {
398 brw_inst_set_src0_reg_type(brw
, inst
, BRW_HW_REG_TYPE_UD
);
399 brw_inst_set_dst_reg_type(brw
, inst
, BRW_HW_REG_TYPE_UD
);
402 if (reg
.address_mode
== BRW_ADDRESS_DIRECT
) {
403 brw_inst_set_src0_da_reg_nr(brw
, inst
, reg
.nr
);
404 if (brw_inst_access_mode(brw
, inst
) == BRW_ALIGN_1
) {
405 brw_inst_set_src0_da1_subreg_nr(brw
, inst
, reg
.subnr
);
407 brw_inst_set_src0_da16_subreg_nr(brw
, inst
, reg
.subnr
/ 16);
410 brw_inst_set_src0_ia_subreg_nr(brw
, inst
, reg
.subnr
);
412 if (brw_inst_access_mode(brw
, inst
) == BRW_ALIGN_1
) {
413 brw_inst_set_src0_ia1_addr_imm(brw
, inst
, reg
.dw1
.bits
.indirect_offset
);
415 brw_inst_set_src0_ia_subreg_nr(brw
, inst
, reg
.dw1
.bits
.indirect_offset
);
419 if (brw_inst_access_mode(brw
, inst
) == BRW_ALIGN_1
) {
420 if (reg
.width
== BRW_WIDTH_1
&&
421 brw_inst_exec_size(brw
, inst
) == BRW_EXECUTE_1
) {
422 brw_inst_set_src0_hstride(brw
, inst
, BRW_HORIZONTAL_STRIDE_0
);
423 brw_inst_set_src0_width(brw
, inst
, BRW_WIDTH_1
);
424 brw_inst_set_src0_vstride(brw
, inst
, BRW_VERTICAL_STRIDE_0
);
426 brw_inst_set_src0_hstride(brw
, inst
, reg
.hstride
);
427 brw_inst_set_src0_width(brw
, inst
, reg
.width
);
428 brw_inst_set_src0_vstride(brw
, inst
, reg
.vstride
);
431 brw_inst_set_src0_da16_swiz_x(brw
, inst
,
432 BRW_GET_SWZ(reg
.dw1
.bits
.swizzle
, BRW_CHANNEL_X
));
433 brw_inst_set_src0_da16_swiz_y(brw
, inst
,
434 BRW_GET_SWZ(reg
.dw1
.bits
.swizzle
, BRW_CHANNEL_Y
));
435 brw_inst_set_src0_da16_swiz_z(brw
, inst
,
436 BRW_GET_SWZ(reg
.dw1
.bits
.swizzle
, BRW_CHANNEL_Z
));
437 brw_inst_set_src0_da16_swiz_w(brw
, inst
,
438 BRW_GET_SWZ(reg
.dw1
.bits
.swizzle
, BRW_CHANNEL_W
));
440 /* This is an oddity of the fact we're using the same
441 * descriptions for registers in align_16 as align_1:
443 if (reg
.vstride
== BRW_VERTICAL_STRIDE_8
)
444 brw_inst_set_src0_vstride(brw
, inst
, BRW_VERTICAL_STRIDE_4
);
446 brw_inst_set_src0_vstride(brw
, inst
, reg
.vstride
);
453 brw_set_src1(struct brw_compile
*p
, brw_inst
*inst
, struct brw_reg reg
)
455 const struct brw_context
*brw
= p
->brw
;
456 assert(reg
.file
!= BRW_MESSAGE_REGISTER_FILE
);
458 if (reg
.file
!= BRW_ARCHITECTURE_REGISTER_FILE
)
459 assert(reg
.nr
< 128);
461 gen7_convert_mrf_to_grf(p
, ®
);
463 validate_reg(brw
, inst
, reg
);
465 brw_inst_set_src1_reg_file(brw
, inst
, reg
.file
);
466 brw_inst_set_src1_reg_type(brw
, inst
,
467 brw_reg_type_to_hw_type(brw
, reg
.type
, reg
.file
));
468 brw_inst_set_src1_abs(brw
, inst
, reg
.abs
);
469 brw_inst_set_src1_negate(brw
, inst
, reg
.negate
);
471 /* Only src1 can be immediate in two-argument instructions.
473 assert(brw_inst_src0_reg_file(brw
, inst
) != BRW_IMMEDIATE_VALUE
);
475 if (reg
.file
== BRW_IMMEDIATE_VALUE
) {
476 brw_inst_set_imm_ud(brw
, inst
, reg
.dw1
.ud
);
478 /* This is a hardware restriction, which may or may not be lifted
481 assert (reg
.address_mode
== BRW_ADDRESS_DIRECT
);
482 /* assert (reg.file == BRW_GENERAL_REGISTER_FILE); */
484 brw_inst_set_src1_da_reg_nr(brw
, inst
, reg
.nr
);
485 if (brw_inst_access_mode(brw
, inst
) == BRW_ALIGN_1
) {
486 brw_inst_set_src1_da1_subreg_nr(brw
, inst
, reg
.subnr
);
488 brw_inst_set_src1_da16_subreg_nr(brw
, inst
, reg
.subnr
/ 16);
491 if (brw_inst_access_mode(brw
, inst
) == BRW_ALIGN_1
) {
492 if (reg
.width
== BRW_WIDTH_1
&&
493 brw_inst_exec_size(brw
, inst
) == BRW_EXECUTE_1
) {
494 brw_inst_set_src1_hstride(brw
, inst
, BRW_HORIZONTAL_STRIDE_0
);
495 brw_inst_set_src1_width(brw
, inst
, BRW_WIDTH_1
);
496 brw_inst_set_src1_vstride(brw
, inst
, BRW_VERTICAL_STRIDE_0
);
498 brw_inst_set_src1_hstride(brw
, inst
, reg
.hstride
);
499 brw_inst_set_src1_width(brw
, inst
, reg
.width
);
500 brw_inst_set_src1_vstride(brw
, inst
, reg
.vstride
);
503 brw_inst_set_src1_da16_swiz_x(brw
, inst
,
504 BRW_GET_SWZ(reg
.dw1
.bits
.swizzle
, BRW_CHANNEL_X
));
505 brw_inst_set_src1_da16_swiz_y(brw
, inst
,
506 BRW_GET_SWZ(reg
.dw1
.bits
.swizzle
, BRW_CHANNEL_Y
));
507 brw_inst_set_src1_da16_swiz_z(brw
, inst
,
508 BRW_GET_SWZ(reg
.dw1
.bits
.swizzle
, BRW_CHANNEL_Z
));
509 brw_inst_set_src1_da16_swiz_w(brw
, inst
,
510 BRW_GET_SWZ(reg
.dw1
.bits
.swizzle
, BRW_CHANNEL_W
));
512 /* This is an oddity of the fact we're using the same
513 * descriptions for registers in align_16 as align_1:
515 if (reg
.vstride
== BRW_VERTICAL_STRIDE_8
)
516 brw_inst_set_src1_vstride(brw
, inst
, BRW_VERTICAL_STRIDE_4
);
518 brw_inst_set_src1_vstride(brw
, inst
, reg
.vstride
);
524 * Set the Message Descriptor and Extended Message Descriptor fields
527 * \note This zeroes out the Function Control bits, so it must be called
528 * \b before filling out any message-specific data. Callers can
529 * choose not to fill in irrelevant bits; they will be zero.
532 brw_set_message_descriptor(struct brw_compile
*p
,
534 enum brw_message_target sfid
,
536 unsigned response_length
,
540 struct brw_context
*brw
= p
->brw
;
542 brw_set_src1(p
, inst
, brw_imm_d(0));
543 brw_inst_set_sfid(brw
, inst
, sfid
);
544 brw_inst_set_mlen(brw
, inst
, msg_length
);
545 brw_inst_set_rlen(brw
, inst
, response_length
);
546 brw_inst_set_eot(brw
, inst
, end_of_thread
);
549 brw_inst_set_header_present(brw
, inst
, header_present
);
553 static void brw_set_math_message( struct brw_compile
*p
,
556 unsigned integer_type
,
560 struct brw_context
*brw
= p
->brw
;
562 unsigned response_length
;
564 /* Infer message length from the function */
566 case BRW_MATH_FUNCTION_POW
:
567 case BRW_MATH_FUNCTION_INT_DIV_QUOTIENT
:
568 case BRW_MATH_FUNCTION_INT_DIV_REMAINDER
:
569 case BRW_MATH_FUNCTION_INT_DIV_QUOTIENT_AND_REMAINDER
:
577 /* Infer response length from the function */
579 case BRW_MATH_FUNCTION_SINCOS
:
580 case BRW_MATH_FUNCTION_INT_DIV_QUOTIENT_AND_REMAINDER
:
589 brw_set_message_descriptor(p
, inst
, BRW_SFID_MATH
,
590 msg_length
, response_length
, false, false);
591 brw_inst_set_math_msg_function(brw
, inst
, function
);
592 brw_inst_set_math_msg_signed_int(brw
, inst
, integer_type
);
593 brw_inst_set_math_msg_precision(brw
, inst
, low_precision
);
594 brw_inst_set_math_msg_saturate(brw
, inst
, brw_inst_saturate(brw
, inst
));
595 brw_inst_set_math_msg_data_type(brw
, inst
, dataType
);
596 brw_inst_set_saturate(brw
, inst
, 0);
600 static void brw_set_ff_sync_message(struct brw_compile
*p
,
603 unsigned response_length
,
606 const struct brw_context
*brw
= p
->brw
;
608 brw_set_message_descriptor(p
, insn
, BRW_SFID_URB
,
609 1, response_length
, true, end_of_thread
);
610 brw_inst_set_urb_opcode(brw
, insn
, 1); /* FF_SYNC */
611 brw_inst_set_urb_allocate(brw
, insn
, allocate
);
612 /* The following fields are not used by FF_SYNC: */
613 brw_inst_set_urb_global_offset(brw
, insn
, 0);
614 brw_inst_set_urb_swizzle_control(brw
, insn
, 0);
615 brw_inst_set_urb_used(brw
, insn
, 0);
616 brw_inst_set_urb_complete(brw
, insn
, 0);
619 static void brw_set_urb_message( struct brw_compile
*p
,
621 enum brw_urb_write_flags flags
,
623 unsigned response_length
,
625 unsigned swizzle_control
)
627 struct brw_context
*brw
= p
->brw
;
629 assert(brw
->gen
< 7 || swizzle_control
!= BRW_URB_SWIZZLE_TRANSPOSE
);
630 assert(brw
->gen
< 7 || !(flags
& BRW_URB_WRITE_ALLOCATE
));
631 assert(brw
->gen
>= 7 || !(flags
& BRW_URB_WRITE_PER_SLOT_OFFSET
));
633 brw_set_message_descriptor(p
, insn
, BRW_SFID_URB
,
634 msg_length
, response_length
, true,
635 flags
& BRW_URB_WRITE_EOT
);
637 if (flags
& BRW_URB_WRITE_OWORD
) {
638 assert(msg_length
== 2); /* header + one OWORD of data */
639 brw_inst_set_urb_opcode(brw
, insn
, BRW_URB_OPCODE_WRITE_OWORD
);
641 brw_inst_set_urb_opcode(brw
, insn
, BRW_URB_OPCODE_WRITE_HWORD
);
644 brw_inst_set_urb_global_offset(brw
, insn
, offset
);
645 brw_inst_set_urb_swizzle_control(brw
, insn
, swizzle_control
);
648 brw_inst_set_urb_complete(brw
, insn
, !!(flags
& BRW_URB_WRITE_COMPLETE
));
652 brw_inst_set_urb_allocate(brw
, insn
, !!(flags
& BRW_URB_WRITE_ALLOCATE
));
653 brw_inst_set_urb_used(brw
, insn
, !(flags
& BRW_URB_WRITE_UNUSED
));
655 brw_inst_set_urb_per_slot_offset(brw
, insn
,
656 !!(flags
& BRW_URB_WRITE_PER_SLOT_OFFSET
));
661 brw_set_dp_write_message(struct brw_compile
*p
,
663 unsigned binding_table_index
,
664 unsigned msg_control
,
668 unsigned last_render_target
,
669 unsigned response_length
,
670 unsigned end_of_thread
,
671 unsigned send_commit_msg
)
673 struct brw_context
*brw
= p
->brw
;
677 /* Use the Render Cache for RT writes; otherwise use the Data Cache */
678 if (msg_type
== GEN6_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_WRITE
)
679 sfid
= GEN6_SFID_DATAPORT_RENDER_CACHE
;
681 sfid
= GEN7_SFID_DATAPORT_DATA_CACHE
;
682 } else if (brw
->gen
== 6) {
683 /* Use the render cache for all write messages. */
684 sfid
= GEN6_SFID_DATAPORT_RENDER_CACHE
;
686 sfid
= BRW_SFID_DATAPORT_WRITE
;
689 brw_set_message_descriptor(p
, insn
, sfid
, msg_length
, response_length
,
690 header_present
, end_of_thread
);
692 brw_inst_set_binding_table_index(brw
, insn
, binding_table_index
);
693 brw_inst_set_dp_write_msg_type(brw
, insn
, msg_type
);
694 brw_inst_set_dp_write_msg_control(brw
, insn
, msg_control
);
695 brw_inst_set_rt_last(brw
, insn
, last_render_target
);
697 brw_inst_set_dp_write_commit(brw
, insn
, send_commit_msg
);
702 brw_set_dp_read_message(struct brw_compile
*p
,
704 unsigned binding_table_index
,
705 unsigned msg_control
,
707 unsigned target_cache
,
710 unsigned response_length
)
712 struct brw_context
*brw
= p
->brw
;
716 sfid
= GEN7_SFID_DATAPORT_DATA_CACHE
;
717 } else if (brw
->gen
== 6) {
718 if (target_cache
== BRW_DATAPORT_READ_TARGET_RENDER_CACHE
)
719 sfid
= GEN6_SFID_DATAPORT_RENDER_CACHE
;
721 sfid
= GEN6_SFID_DATAPORT_SAMPLER_CACHE
;
723 sfid
= BRW_SFID_DATAPORT_READ
;
726 brw_set_message_descriptor(p
, insn
, sfid
, msg_length
, response_length
,
727 header_present
, false);
729 brw_inst_set_binding_table_index(brw
, insn
, binding_table_index
);
730 brw_inst_set_dp_read_msg_type(brw
, insn
, msg_type
);
731 brw_inst_set_dp_read_msg_control(brw
, insn
, msg_control
);
733 brw_inst_set_dp_read_target_cache(brw
, insn
, target_cache
);
737 brw_set_sampler_message(struct brw_compile
*p
,
739 unsigned binding_table_index
,
742 unsigned response_length
,
744 unsigned header_present
,
746 unsigned return_format
)
748 struct brw_context
*brw
= p
->brw
;
750 brw_set_message_descriptor(p
, inst
, BRW_SFID_SAMPLER
, msg_length
,
751 response_length
, header_present
, false);
753 brw_inst_set_binding_table_index(brw
, inst
, binding_table_index
);
754 brw_inst_set_sampler(brw
, inst
, sampler
);
755 brw_inst_set_sampler_msg_type(brw
, inst
, msg_type
);
757 brw_inst_set_sampler_simd_mode(brw
, inst
, simd_mode
);
758 } else if (brw
->gen
== 4 && !brw
->is_g4x
) {
759 brw_inst_set_sampler_return_format(brw
, inst
, return_format
);
764 gen7_set_dp_scratch_message(struct brw_compile
*p
,
768 bool invalidate_after_read
,
770 unsigned addr_offset
,
775 const struct brw_context
*brw
= p
->brw
;
776 assert(num_regs
== 1 || num_regs
== 2 || num_regs
== 4 ||
777 (brw
->gen
>= 8 && num_regs
== 8));
778 brw_set_message_descriptor(p
, inst
, GEN7_SFID_DATAPORT_DATA_CACHE
,
779 mlen
, rlen
, header_present
, false);
780 brw_inst_set_dp_category(brw
, inst
, 1); /* Scratch Block Read/Write msgs */
781 brw_inst_set_scratch_read_write(brw
, inst
, write
);
782 brw_inst_set_scratch_type(brw
, inst
, dword
);
783 brw_inst_set_scratch_invalidate_after_read(brw
, inst
, invalidate_after_read
);
784 brw_inst_set_scratch_block_size(brw
, inst
, ffs(num_regs
) - 1);
785 brw_inst_set_scratch_addr_offset(brw
, inst
, addr_offset
);
788 #define next_insn brw_next_insn
790 brw_next_insn(struct brw_compile
*p
, unsigned opcode
)
792 const struct brw_context
*brw
= p
->brw
;
795 if (p
->nr_insn
+ 1 > p
->store_size
) {
797 p
->store
= reralloc(p
->mem_ctx
, p
->store
, brw_inst
, p
->store_size
);
800 p
->next_insn_offset
+= 16;
801 insn
= &p
->store
[p
->nr_insn
++];
802 memcpy(insn
, p
->current
, sizeof(*insn
));
804 brw_inst_set_opcode(brw
, insn
, opcode
);
809 brw_alu1(struct brw_compile
*p
, unsigned opcode
,
810 struct brw_reg dest
, struct brw_reg src
)
812 brw_inst
*insn
= next_insn(p
, opcode
);
813 brw_set_dest(p
, insn
, dest
);
814 brw_set_src0(p
, insn
, src
);
819 brw_alu2(struct brw_compile
*p
, unsigned opcode
,
820 struct brw_reg dest
, struct brw_reg src0
, struct brw_reg src1
)
822 brw_inst
*insn
= next_insn(p
, opcode
);
823 brw_set_dest(p
, insn
, dest
);
824 brw_set_src0(p
, insn
, src0
);
825 brw_set_src1(p
, insn
, src1
);
830 get_3src_subreg_nr(struct brw_reg reg
)
832 if (reg
.vstride
== BRW_VERTICAL_STRIDE_0
) {
833 assert(brw_is_single_value_swizzle(reg
.dw1
.bits
.swizzle
));
834 return reg
.subnr
/ 4 + BRW_GET_SWZ(reg
.dw1
.bits
.swizzle
, 0);
836 return reg
.subnr
/ 4;
841 brw_alu3(struct brw_compile
*p
, unsigned opcode
, struct brw_reg dest
,
842 struct brw_reg src0
, struct brw_reg src1
, struct brw_reg src2
)
844 struct brw_context
*brw
= p
->brw
;
845 brw_inst
*inst
= next_insn(p
, opcode
);
847 gen7_convert_mrf_to_grf(p
, &dest
);
849 assert(brw_inst_access_mode(brw
, inst
) == BRW_ALIGN_16
);
851 assert(dest
.file
== BRW_GENERAL_REGISTER_FILE
||
852 dest
.file
== BRW_MESSAGE_REGISTER_FILE
);
853 assert(dest
.nr
< 128);
854 assert(dest
.address_mode
== BRW_ADDRESS_DIRECT
);
855 assert(dest
.type
== BRW_REGISTER_TYPE_F
||
856 dest
.type
== BRW_REGISTER_TYPE_D
||
857 dest
.type
== BRW_REGISTER_TYPE_UD
);
859 brw_inst_set_3src_dst_reg_file(brw
, inst
,
860 dest
.file
== BRW_MESSAGE_REGISTER_FILE
);
862 brw_inst_set_3src_dst_reg_nr(brw
, inst
, dest
.nr
);
863 brw_inst_set_3src_dst_subreg_nr(brw
, inst
, dest
.subnr
/ 16);
864 brw_inst_set_3src_dst_writemask(brw
, inst
, dest
.dw1
.bits
.writemask
);
865 guess_execution_size(p
, inst
, dest
);
867 assert(src0
.file
== BRW_GENERAL_REGISTER_FILE
);
868 assert(src0
.address_mode
== BRW_ADDRESS_DIRECT
);
869 assert(src0
.nr
< 128);
870 brw_inst_set_3src_src0_swizzle(brw
, inst
, src0
.dw1
.bits
.swizzle
);
871 brw_inst_set_3src_src0_subreg_nr(brw
, inst
, get_3src_subreg_nr(src0
));
872 brw_inst_set_3src_src0_reg_nr(brw
, inst
, src0
.nr
);
873 brw_inst_set_3src_src0_abs(brw
, inst
, src0
.abs
);
874 brw_inst_set_3src_src0_negate(brw
, inst
, src0
.negate
);
875 brw_inst_set_3src_src0_rep_ctrl(brw
, inst
,
876 src0
.vstride
== BRW_VERTICAL_STRIDE_0
);
878 assert(src1
.file
== BRW_GENERAL_REGISTER_FILE
);
879 assert(src1
.address_mode
== BRW_ADDRESS_DIRECT
);
880 assert(src1
.nr
< 128);
881 brw_inst_set_3src_src1_swizzle(brw
, inst
, src1
.dw1
.bits
.swizzle
);
882 brw_inst_set_3src_src1_subreg_nr(brw
, inst
, get_3src_subreg_nr(src1
));
883 brw_inst_set_3src_src1_reg_nr(brw
, inst
, src1
.nr
);
884 brw_inst_set_3src_src1_abs(brw
, inst
, src1
.abs
);
885 brw_inst_set_3src_src1_negate(brw
, inst
, src1
.negate
);
886 brw_inst_set_3src_src1_rep_ctrl(brw
, inst
,
887 src1
.vstride
== BRW_VERTICAL_STRIDE_0
);
889 assert(src2
.file
== BRW_GENERAL_REGISTER_FILE
);
890 assert(src2
.address_mode
== BRW_ADDRESS_DIRECT
);
891 assert(src2
.nr
< 128);
892 brw_inst_set_3src_src2_swizzle(brw
, inst
, src2
.dw1
.bits
.swizzle
);
893 brw_inst_set_3src_src2_subreg_nr(brw
, inst
, get_3src_subreg_nr(src2
));
894 brw_inst_set_3src_src2_reg_nr(brw
, inst
, src2
.nr
);
895 brw_inst_set_3src_src2_abs(brw
, inst
, src2
.abs
);
896 brw_inst_set_3src_src2_negate(brw
, inst
, src2
.negate
);
897 brw_inst_set_3src_src2_rep_ctrl(brw
, inst
,
898 src2
.vstride
== BRW_VERTICAL_STRIDE_0
);
901 /* Set both the source and destination types based on dest.type,
902 * ignoring the source register types. The MAD and LRP emitters ensure
903 * that all four types are float. The BFE and BFI2 emitters, however,
904 * may send us mixed D and UD types and want us to ignore that and use
905 * the destination type.
908 case BRW_REGISTER_TYPE_F
:
909 brw_inst_set_3src_src_type(brw
, inst
, BRW_3SRC_TYPE_F
);
910 brw_inst_set_3src_dst_type(brw
, inst
, BRW_3SRC_TYPE_F
);
912 case BRW_REGISTER_TYPE_D
:
913 brw_inst_set_3src_src_type(brw
, inst
, BRW_3SRC_TYPE_D
);
914 brw_inst_set_3src_dst_type(brw
, inst
, BRW_3SRC_TYPE_D
);
916 case BRW_REGISTER_TYPE_UD
:
917 brw_inst_set_3src_src_type(brw
, inst
, BRW_3SRC_TYPE_UD
);
918 brw_inst_set_3src_dst_type(brw
, inst
, BRW_3SRC_TYPE_UD
);
927 /***********************************************************************
928 * Convenience routines.
931 brw_inst *brw_##OP(struct brw_compile *p, \
932 struct brw_reg dest, \
933 struct brw_reg src0) \
935 return brw_alu1(p, BRW_OPCODE_##OP, dest, src0); \
939 brw_inst *brw_##OP(struct brw_compile *p, \
940 struct brw_reg dest, \
941 struct brw_reg src0, \
942 struct brw_reg src1) \
944 return brw_alu2(p, BRW_OPCODE_##OP, dest, src0, src1); \
948 brw_inst *brw_##OP(struct brw_compile *p, \
949 struct brw_reg dest, \
950 struct brw_reg src0, \
951 struct brw_reg src1, \
952 struct brw_reg src2) \
954 return brw_alu3(p, BRW_OPCODE_##OP, dest, src0, src1, src2); \
958 brw_inst *brw_##OP(struct brw_compile *p, \
959 struct brw_reg dest, \
960 struct brw_reg src0, \
961 struct brw_reg src1, \
962 struct brw_reg src2) \
964 assert(dest.type == BRW_REGISTER_TYPE_F); \
965 assert(src0.type == BRW_REGISTER_TYPE_F); \
966 assert(src1.type == BRW_REGISTER_TYPE_F); \
967 assert(src2.type == BRW_REGISTER_TYPE_F); \
968 return brw_alu3(p, BRW_OPCODE_##OP, dest, src0, src1, src2); \
971 /* Rounding operations (other than RNDD) require two instructions - the first
972 * stores a rounded value (possibly the wrong way) in the dest register, but
973 * also sets a per-channel "increment bit" in the flag register. A predicated
974 * add of 1.0 fixes dest to contain the desired result.
976 * Sandybridge and later appear to round correctly without an ADD.
979 void brw_##OP(struct brw_compile *p, \
980 struct brw_reg dest, \
981 struct brw_reg src) \
983 struct brw_context *brw = p->brw; \
984 brw_inst *rnd, *add; \
985 rnd = next_insn(p, BRW_OPCODE_##OP); \
986 brw_set_dest(p, rnd, dest); \
987 brw_set_src0(p, rnd, src); \
989 if (brw->gen < 6) { \
990 /* turn on round-increments */ \
991 brw_inst_set_cond_modifier(brw, rnd, BRW_CONDITIONAL_R); \
992 add = brw_ADD(p, dest, dest, brw_imm_f(1.0f)); \
993 brw_inst_set_pred_control(brw, add, BRW_PREDICATE_NORMAL); \
1037 brw_ADD(struct brw_compile
*p
, struct brw_reg dest
,
1038 struct brw_reg src0
, struct brw_reg src1
)
1041 if (src0
.type
== BRW_REGISTER_TYPE_F
||
1042 (src0
.file
== BRW_IMMEDIATE_VALUE
&&
1043 src0
.type
== BRW_REGISTER_TYPE_VF
)) {
1044 assert(src1
.type
!= BRW_REGISTER_TYPE_UD
);
1045 assert(src1
.type
!= BRW_REGISTER_TYPE_D
);
1048 if (src1
.type
== BRW_REGISTER_TYPE_F
||
1049 (src1
.file
== BRW_IMMEDIATE_VALUE
&&
1050 src1
.type
== BRW_REGISTER_TYPE_VF
)) {
1051 assert(src0
.type
!= BRW_REGISTER_TYPE_UD
);
1052 assert(src0
.type
!= BRW_REGISTER_TYPE_D
);
1055 return brw_alu2(p
, BRW_OPCODE_ADD
, dest
, src0
, src1
);
1059 brw_AVG(struct brw_compile
*p
, struct brw_reg dest
,
1060 struct brw_reg src0
, struct brw_reg src1
)
1062 assert(dest
.type
== src0
.type
);
1063 assert(src0
.type
== src1
.type
);
1064 switch (src0
.type
) {
1065 case BRW_REGISTER_TYPE_B
:
1066 case BRW_REGISTER_TYPE_UB
:
1067 case BRW_REGISTER_TYPE_W
:
1068 case BRW_REGISTER_TYPE_UW
:
1069 case BRW_REGISTER_TYPE_D
:
1070 case BRW_REGISTER_TYPE_UD
:
1073 unreachable("Bad type for brw_AVG");
1076 return brw_alu2(p
, BRW_OPCODE_AVG
, dest
, src0
, src1
);
1080 brw_MUL(struct brw_compile
*p
, struct brw_reg dest
,
1081 struct brw_reg src0
, struct brw_reg src1
)
1084 if (src0
.type
== BRW_REGISTER_TYPE_D
||
1085 src0
.type
== BRW_REGISTER_TYPE_UD
||
1086 src1
.type
== BRW_REGISTER_TYPE_D
||
1087 src1
.type
== BRW_REGISTER_TYPE_UD
) {
1088 assert(dest
.type
!= BRW_REGISTER_TYPE_F
);
1091 if (src0
.type
== BRW_REGISTER_TYPE_F
||
1092 (src0
.file
== BRW_IMMEDIATE_VALUE
&&
1093 src0
.type
== BRW_REGISTER_TYPE_VF
)) {
1094 assert(src1
.type
!= BRW_REGISTER_TYPE_UD
);
1095 assert(src1
.type
!= BRW_REGISTER_TYPE_D
);
1098 if (src1
.type
== BRW_REGISTER_TYPE_F
||
1099 (src1
.file
== BRW_IMMEDIATE_VALUE
&&
1100 src1
.type
== BRW_REGISTER_TYPE_VF
)) {
1101 assert(src0
.type
!= BRW_REGISTER_TYPE_UD
);
1102 assert(src0
.type
!= BRW_REGISTER_TYPE_D
);
1105 assert(src0
.file
!= BRW_ARCHITECTURE_REGISTER_FILE
||
1106 src0
.nr
!= BRW_ARF_ACCUMULATOR
);
1107 assert(src1
.file
!= BRW_ARCHITECTURE_REGISTER_FILE
||
1108 src1
.nr
!= BRW_ARF_ACCUMULATOR
);
1110 return brw_alu2(p
, BRW_OPCODE_MUL
, dest
, src0
, src1
);
1114 void brw_NOP(struct brw_compile
*p
)
1116 brw_inst
*insn
= next_insn(p
, BRW_OPCODE_NOP
);
1117 brw_set_dest(p
, insn
, retype(brw_vec4_grf(0,0), BRW_REGISTER_TYPE_UD
));
1118 brw_set_src0(p
, insn
, retype(brw_vec4_grf(0,0), BRW_REGISTER_TYPE_UD
));
1119 brw_set_src1(p
, insn
, brw_imm_ud(0x0));
1126 /***********************************************************************
1127 * Comparisons, if/else/endif
1131 brw_JMPI(struct brw_compile
*p
, struct brw_reg index
,
1132 unsigned predicate_control
)
1134 const struct brw_context
*brw
= p
->brw
;
1135 struct brw_reg ip
= brw_ip_reg();
1136 brw_inst
*inst
= brw_alu2(p
, BRW_OPCODE_JMPI
, ip
, ip
, index
);
1138 brw_inst_set_exec_size(brw
, inst
, BRW_EXECUTE_2
);
1139 brw_inst_set_qtr_control(brw
, inst
, BRW_COMPRESSION_NONE
);
1140 brw_inst_set_mask_control(brw
, inst
, BRW_MASK_DISABLE
);
1141 brw_inst_set_pred_control(brw
, inst
, predicate_control
);
1147 push_if_stack(struct brw_compile
*p
, brw_inst
*inst
)
1149 p
->if_stack
[p
->if_stack_depth
] = inst
- p
->store
;
1151 p
->if_stack_depth
++;
1152 if (p
->if_stack_array_size
<= p
->if_stack_depth
) {
1153 p
->if_stack_array_size
*= 2;
1154 p
->if_stack
= reralloc(p
->mem_ctx
, p
->if_stack
, int,
1155 p
->if_stack_array_size
);
1160 pop_if_stack(struct brw_compile
*p
)
1162 p
->if_stack_depth
--;
1163 return &p
->store
[p
->if_stack
[p
->if_stack_depth
]];
1167 push_loop_stack(struct brw_compile
*p
, brw_inst
*inst
)
1169 if (p
->loop_stack_array_size
< p
->loop_stack_depth
) {
1170 p
->loop_stack_array_size
*= 2;
1171 p
->loop_stack
= reralloc(p
->mem_ctx
, p
->loop_stack
, int,
1172 p
->loop_stack_array_size
);
1173 p
->if_depth_in_loop
= reralloc(p
->mem_ctx
, p
->if_depth_in_loop
, int,
1174 p
->loop_stack_array_size
);
1177 p
->loop_stack
[p
->loop_stack_depth
] = inst
- p
->store
;
1178 p
->loop_stack_depth
++;
1179 p
->if_depth_in_loop
[p
->loop_stack_depth
] = 0;
1183 get_inner_do_insn(struct brw_compile
*p
)
1185 return &p
->store
[p
->loop_stack
[p
->loop_stack_depth
- 1]];
1188 /* EU takes the value from the flag register and pushes it onto some
1189 * sort of a stack (presumably merging with any flag value already on
1190 * the stack). Within an if block, the flags at the top of the stack
1191 * control execution on each channel of the unit, eg. on each of the
1192 * 16 pixel values in our wm programs.
1194 * When the matching 'else' instruction is reached (presumably by
1195 * countdown of the instruction count patched in by our ELSE/ENDIF
1196 * functions), the relevent flags are inverted.
1198 * When the matching 'endif' instruction is reached, the flags are
1199 * popped off. If the stack is now empty, normal execution resumes.
1202 brw_IF(struct brw_compile
*p
, unsigned execute_size
)
1204 struct brw_context
*brw
= p
->brw
;
1207 insn
= next_insn(p
, BRW_OPCODE_IF
);
1209 /* Override the defaults for this instruction:
1212 brw_set_dest(p
, insn
, brw_ip_reg());
1213 brw_set_src0(p
, insn
, brw_ip_reg());
1214 brw_set_src1(p
, insn
, brw_imm_d(0x0));
1215 } else if (brw
->gen
== 6) {
1216 brw_set_dest(p
, insn
, brw_imm_w(0));
1217 brw_inst_set_gen6_jump_count(brw
, insn
, 0);
1218 brw_set_src0(p
, insn
, vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_D
)));
1219 brw_set_src1(p
, insn
, vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_D
)));
1221 brw_set_dest(p
, insn
, vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_D
)));
1222 brw_set_src0(p
, insn
, vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_D
)));
1223 brw_set_src1(p
, insn
, brw_imm_ud(0));
1224 brw_inst_set_jip(brw
, insn
, 0);
1225 brw_inst_set_uip(brw
, insn
, 0);
1228 brw_inst_set_exec_size(brw
, insn
, execute_size
);
1229 brw_inst_set_qtr_control(brw
, insn
, BRW_COMPRESSION_NONE
);
1230 brw_inst_set_pred_control(brw
, insn
, BRW_PREDICATE_NORMAL
);
1231 brw_inst_set_mask_control(brw
, insn
, BRW_MASK_ENABLE
);
1232 if (!p
->single_program_flow
&& brw
->gen
< 6)
1233 brw_inst_set_thread_control(brw
, insn
, BRW_THREAD_SWITCH
);
1235 push_if_stack(p
, insn
);
1236 p
->if_depth_in_loop
[p
->loop_stack_depth
]++;
1240 /* This function is only used for gen6-style IF instructions with an
1241 * embedded comparison (conditional modifier). It is not used on gen7.
1244 gen6_IF(struct brw_compile
*p
, enum brw_conditional_mod conditional
,
1245 struct brw_reg src0
, struct brw_reg src1
)
1247 const struct brw_context
*brw
= p
->brw
;
1250 insn
= next_insn(p
, BRW_OPCODE_IF
);
1252 brw_set_dest(p
, insn
, brw_imm_w(0));
1253 brw_inst_set_exec_size(brw
, insn
, p
->compressed
? BRW_EXECUTE_16
1255 brw_inst_set_gen6_jump_count(brw
, insn
, 0);
1256 brw_set_src0(p
, insn
, src0
);
1257 brw_set_src1(p
, insn
, src1
);
1259 assert(brw_inst_qtr_control(brw
, insn
) == BRW_COMPRESSION_NONE
);
1260 assert(brw_inst_pred_control(brw
, insn
) == BRW_PREDICATE_NONE
);
1261 brw_inst_set_cond_modifier(brw
, insn
, conditional
);
1263 push_if_stack(p
, insn
);
1268 * In single-program-flow (SPF) mode, convert IF and ELSE into ADDs.
1271 convert_IF_ELSE_to_ADD(struct brw_compile
*p
,
1272 brw_inst
*if_inst
, brw_inst
*else_inst
)
1274 const struct brw_context
*brw
= p
->brw
;
1276 /* The next instruction (where the ENDIF would be, if it existed) */
1277 brw_inst
*next_inst
= &p
->store
[p
->nr_insn
];
1279 assert(p
->single_program_flow
);
1280 assert(if_inst
!= NULL
&& brw_inst_opcode(brw
, if_inst
) == BRW_OPCODE_IF
);
1281 assert(else_inst
== NULL
|| brw_inst_opcode(brw
, else_inst
) == BRW_OPCODE_ELSE
);
1282 assert(brw_inst_exec_size(brw
, if_inst
) == BRW_EXECUTE_1
);
1284 /* Convert IF to an ADD instruction that moves the instruction pointer
1285 * to the first instruction of the ELSE block. If there is no ELSE
1286 * block, point to where ENDIF would be. Reverse the predicate.
1288 * There's no need to execute an ENDIF since we don't need to do any
1289 * stack operations, and if we're currently executing, we just want to
1290 * continue normally.
1292 brw_inst_set_opcode(brw
, if_inst
, BRW_OPCODE_ADD
);
1293 brw_inst_set_pred_inv(brw
, if_inst
, true);
1295 if (else_inst
!= NULL
) {
1296 /* Convert ELSE to an ADD instruction that points where the ENDIF
1299 brw_inst_set_opcode(brw
, else_inst
, BRW_OPCODE_ADD
);
1301 brw_inst_set_imm_ud(brw
, if_inst
, (else_inst
- if_inst
+ 1) * 16);
1302 brw_inst_set_imm_ud(brw
, else_inst
, (next_inst
- else_inst
) * 16);
1304 brw_inst_set_imm_ud(brw
, if_inst
, (next_inst
- if_inst
) * 16);
1309 * Patch IF and ELSE instructions with appropriate jump targets.
1312 patch_IF_ELSE(struct brw_compile
*p
,
1313 brw_inst
*if_inst
, brw_inst
*else_inst
, brw_inst
*endif_inst
)
1315 struct brw_context
*brw
= p
->brw
;
1317 /* We shouldn't be patching IF and ELSE instructions in single program flow
1318 * mode when gen < 6, because in single program flow mode on those
1319 * platforms, we convert flow control instructions to conditional ADDs that
1320 * operate on IP (see brw_ENDIF).
1322 * However, on Gen6, writing to IP doesn't work in single program flow mode
1323 * (see the SandyBridge PRM, Volume 4 part 2, p79: "When SPF is ON, IP may
1324 * not be updated by non-flow control instructions."). And on later
1325 * platforms, there is no significant benefit to converting control flow
1326 * instructions to conditional ADDs. So we do patch IF and ELSE
1327 * instructions in single program flow mode on those platforms.
1330 assert(!p
->single_program_flow
);
1332 assert(if_inst
!= NULL
&& brw_inst_opcode(brw
, if_inst
) == BRW_OPCODE_IF
);
1333 assert(endif_inst
!= NULL
);
1334 assert(else_inst
== NULL
|| brw_inst_opcode(brw
, else_inst
) == BRW_OPCODE_ELSE
);
1336 unsigned br
= brw_jump_scale(brw
);
1338 assert(brw_inst_opcode(brw
, endif_inst
) == BRW_OPCODE_ENDIF
);
1339 brw_inst_set_exec_size(brw
, endif_inst
, brw_inst_exec_size(brw
, if_inst
));
1341 if (else_inst
== NULL
) {
1342 /* Patch IF -> ENDIF */
1344 /* Turn it into an IFF, which means no mask stack operations for
1345 * all-false and jumping past the ENDIF.
1347 brw_inst_set_opcode(brw
, if_inst
, BRW_OPCODE_IFF
);
1348 brw_inst_set_gen4_jump_count(brw
, if_inst
,
1349 br
* (endif_inst
- if_inst
+ 1));
1350 brw_inst_set_gen4_pop_count(brw
, if_inst
, 0);
1351 } else if (brw
->gen
== 6) {
1352 /* As of gen6, there is no IFF and IF must point to the ENDIF. */
1353 brw_inst_set_gen6_jump_count(brw
, if_inst
, br
*(endif_inst
- if_inst
));
1355 brw_inst_set_uip(brw
, if_inst
, br
* (endif_inst
- if_inst
));
1356 brw_inst_set_jip(brw
, if_inst
, br
* (endif_inst
- if_inst
));
1359 brw_inst_set_exec_size(brw
, else_inst
, brw_inst_exec_size(brw
, if_inst
));
1361 /* Patch IF -> ELSE */
1363 brw_inst_set_gen4_jump_count(brw
, if_inst
,
1364 br
* (else_inst
- if_inst
));
1365 brw_inst_set_gen4_pop_count(brw
, if_inst
, 0);
1366 } else if (brw
->gen
== 6) {
1367 brw_inst_set_gen6_jump_count(brw
, if_inst
,
1368 br
* (else_inst
- if_inst
+ 1));
1371 /* Patch ELSE -> ENDIF */
1373 /* BRW_OPCODE_ELSE pre-gen6 should point just past the
1376 brw_inst_set_gen4_jump_count(brw
, else_inst
,
1377 br
* (endif_inst
- else_inst
+ 1));
1378 brw_inst_set_gen4_pop_count(brw
, else_inst
, 1);
1379 } else if (brw
->gen
== 6) {
1380 /* BRW_OPCODE_ELSE on gen6 should point to the matching ENDIF. */
1381 brw_inst_set_gen6_jump_count(brw
, else_inst
,
1382 br
* (endif_inst
- else_inst
));
1384 /* The IF instruction's JIP should point just past the ELSE */
1385 brw_inst_set_jip(brw
, if_inst
, br
* (else_inst
- if_inst
+ 1));
1386 /* The IF instruction's UIP and ELSE's JIP should point to ENDIF */
1387 brw_inst_set_uip(brw
, if_inst
, br
* (endif_inst
- if_inst
));
1388 brw_inst_set_jip(brw
, else_inst
, br
* (endif_inst
- else_inst
));
1389 if (brw
->gen
>= 8) {
1390 /* Since we don't set branch_ctrl, the ELSE's JIP and UIP both
1391 * should point to ENDIF.
1393 brw_inst_set_uip(brw
, else_inst
, br
* (endif_inst
- else_inst
));
1400 brw_ELSE(struct brw_compile
*p
)
1402 struct brw_context
*brw
= p
->brw
;
1405 insn
= next_insn(p
, BRW_OPCODE_ELSE
);
1408 brw_set_dest(p
, insn
, brw_ip_reg());
1409 brw_set_src0(p
, insn
, brw_ip_reg());
1410 brw_set_src1(p
, insn
, brw_imm_d(0x0));
1411 } else if (brw
->gen
== 6) {
1412 brw_set_dest(p
, insn
, brw_imm_w(0));
1413 brw_inst_set_gen6_jump_count(brw
, insn
, 0);
1414 brw_set_src0(p
, insn
, retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
1415 brw_set_src1(p
, insn
, retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
1417 brw_set_dest(p
, insn
, retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
1418 brw_set_src0(p
, insn
, retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
1419 brw_set_src1(p
, insn
, brw_imm_ud(0));
1420 brw_inst_set_jip(brw
, insn
, 0);
1421 brw_inst_set_uip(brw
, insn
, 0);
1424 brw_inst_set_qtr_control(brw
, insn
, BRW_COMPRESSION_NONE
);
1425 brw_inst_set_mask_control(brw
, insn
, BRW_MASK_ENABLE
);
1426 if (!p
->single_program_flow
&& brw
->gen
< 6)
1427 brw_inst_set_thread_control(brw
, insn
, BRW_THREAD_SWITCH
);
1429 push_if_stack(p
, insn
);
1433 brw_ENDIF(struct brw_compile
*p
)
1435 struct brw_context
*brw
= p
->brw
;
1436 brw_inst
*insn
= NULL
;
1437 brw_inst
*else_inst
= NULL
;
1438 brw_inst
*if_inst
= NULL
;
1440 bool emit_endif
= true;
1442 /* In single program flow mode, we can express IF and ELSE instructions
1443 * equivalently as ADD instructions that operate on IP. On platforms prior
1444 * to Gen6, flow control instructions cause an implied thread switch, so
1445 * this is a significant savings.
1447 * However, on Gen6, writing to IP doesn't work in single program flow mode
1448 * (see the SandyBridge PRM, Volume 4 part 2, p79: "When SPF is ON, IP may
1449 * not be updated by non-flow control instructions."). And on later
1450 * platforms, there is no significant benefit to converting control flow
1451 * instructions to conditional ADDs. So we only do this trick on Gen4 and
1454 if (brw
->gen
< 6 && p
->single_program_flow
)
1458 * A single next_insn() may change the base adress of instruction store
1459 * memory(p->store), so call it first before referencing the instruction
1460 * store pointer from an index
1463 insn
= next_insn(p
, BRW_OPCODE_ENDIF
);
1465 /* Pop the IF and (optional) ELSE instructions from the stack */
1466 p
->if_depth_in_loop
[p
->loop_stack_depth
]--;
1467 tmp
= pop_if_stack(p
);
1468 if (brw_inst_opcode(brw
, tmp
) == BRW_OPCODE_ELSE
) {
1470 tmp
= pop_if_stack(p
);
1475 /* ENDIF is useless; don't bother emitting it. */
1476 convert_IF_ELSE_to_ADD(p
, if_inst
, else_inst
);
1481 brw_set_dest(p
, insn
, retype(brw_vec4_grf(0,0), BRW_REGISTER_TYPE_UD
));
1482 brw_set_src0(p
, insn
, retype(brw_vec4_grf(0,0), BRW_REGISTER_TYPE_UD
));
1483 brw_set_src1(p
, insn
, brw_imm_d(0x0));
1484 } else if (brw
->gen
== 6) {
1485 brw_set_dest(p
, insn
, brw_imm_w(0));
1486 brw_set_src0(p
, insn
, retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
1487 brw_set_src1(p
, insn
, retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
1489 brw_set_dest(p
, insn
, retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
1490 brw_set_src0(p
, insn
, retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
1491 brw_set_src1(p
, insn
, brw_imm_ud(0));
1494 brw_inst_set_qtr_control(brw
, insn
, BRW_COMPRESSION_NONE
);
1495 brw_inst_set_mask_control(brw
, insn
, BRW_MASK_ENABLE
);
1497 brw_inst_set_thread_control(brw
, insn
, BRW_THREAD_SWITCH
);
1499 /* Also pop item off the stack in the endif instruction: */
1501 brw_inst_set_gen4_jump_count(brw
, insn
, 0);
1502 brw_inst_set_gen4_pop_count(brw
, insn
, 1);
1503 } else if (brw
->gen
== 6) {
1504 brw_inst_set_gen6_jump_count(brw
, insn
, 2);
1506 brw_inst_set_jip(brw
, insn
, 2);
1508 patch_IF_ELSE(p
, if_inst
, else_inst
, insn
);
1512 brw_BREAK(struct brw_compile
*p
)
1514 struct brw_context
*brw
= p
->brw
;
1517 insn
= next_insn(p
, BRW_OPCODE_BREAK
);
1518 if (brw
->gen
>= 6) {
1519 brw_set_dest(p
, insn
, retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
1520 brw_set_src0(p
, insn
, retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
1521 brw_set_src1(p
, insn
, brw_imm_d(0x0));
1523 brw_set_dest(p
, insn
, brw_ip_reg());
1524 brw_set_src0(p
, insn
, brw_ip_reg());
1525 brw_set_src1(p
, insn
, brw_imm_d(0x0));
1526 brw_inst_set_gen4_pop_count(brw
, insn
,
1527 p
->if_depth_in_loop
[p
->loop_stack_depth
]);
1529 brw_inst_set_qtr_control(brw
, insn
, BRW_COMPRESSION_NONE
);
1530 brw_inst_set_exec_size(brw
, insn
, p
->compressed
? BRW_EXECUTE_16
1537 brw_CONT(struct brw_compile
*p
)
1539 const struct brw_context
*brw
= p
->brw
;
1542 insn
= next_insn(p
, BRW_OPCODE_CONTINUE
);
1543 brw_set_dest(p
, insn
, brw_ip_reg());
1544 brw_set_src0(p
, insn
, brw_ip_reg());
1545 brw_set_src1(p
, insn
, brw_imm_d(0x0));
1548 brw_inst_set_gen4_pop_count(brw
, insn
,
1549 p
->if_depth_in_loop
[p
->loop_stack_depth
]);
1551 brw_inst_set_qtr_control(brw
, insn
, BRW_COMPRESSION_NONE
);
1552 brw_inst_set_exec_size(brw
, insn
, p
->compressed
? BRW_EXECUTE_16
1558 gen6_HALT(struct brw_compile
*p
)
1560 const struct brw_context
*brw
= p
->brw
;
1563 insn
= next_insn(p
, BRW_OPCODE_HALT
);
1564 brw_set_dest(p
, insn
, retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
1565 brw_set_src0(p
, insn
, retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
1566 brw_set_src1(p
, insn
, brw_imm_d(0x0)); /* UIP and JIP, updated later. */
1568 if (p
->compressed
) {
1569 brw_inst_set_exec_size(brw
, insn
, BRW_EXECUTE_16
);
1571 brw_inst_set_qtr_control(brw
, insn
, BRW_COMPRESSION_NONE
);
1572 brw_inst_set_exec_size(brw
, insn
, BRW_EXECUTE_8
);
1579 * The DO/WHILE is just an unterminated loop -- break or continue are
1580 * used for control within the loop. We have a few ways they can be
1583 * For uniform control flow, the WHILE is just a jump, so ADD ip, ip,
1584 * jip and no DO instruction.
1586 * For non-uniform control flow pre-gen6, there's a DO instruction to
1587 * push the mask, and a WHILE to jump back, and BREAK to get out and
1590 * For gen6, there's no more mask stack, so no need for DO. WHILE
1591 * just points back to the first instruction of the loop.
1594 brw_DO(struct brw_compile
*p
, unsigned execute_size
)
1596 struct brw_context
*brw
= p
->brw
;
1598 if (brw
->gen
>= 6 || p
->single_program_flow
) {
1599 push_loop_stack(p
, &p
->store
[p
->nr_insn
]);
1600 return &p
->store
[p
->nr_insn
];
1602 brw_inst
*insn
= next_insn(p
, BRW_OPCODE_DO
);
1604 push_loop_stack(p
, insn
);
1606 /* Override the defaults for this instruction:
1608 brw_set_dest(p
, insn
, brw_null_reg());
1609 brw_set_src0(p
, insn
, brw_null_reg());
1610 brw_set_src1(p
, insn
, brw_null_reg());
1612 brw_inst_set_qtr_control(brw
, insn
, BRW_COMPRESSION_NONE
);
1613 brw_inst_set_exec_size(brw
, insn
, execute_size
);
1614 brw_inst_set_pred_control(brw
, insn
, BRW_PREDICATE_NONE
);
1621 * For pre-gen6, we patch BREAK/CONT instructions to point at the WHILE
1624 * For gen6+, see brw_set_uip_jip(), which doesn't care so much about the loop
1625 * nesting, since it can always just point to the end of the block/current loop.
1628 brw_patch_break_cont(struct brw_compile
*p
, brw_inst
*while_inst
)
1630 struct brw_context
*brw
= p
->brw
;
1631 brw_inst
*do_inst
= get_inner_do_insn(p
);
1633 unsigned br
= brw_jump_scale(brw
);
1635 assert(brw
->gen
< 6);
1637 for (inst
= while_inst
- 1; inst
!= do_inst
; inst
--) {
1638 /* If the jump count is != 0, that means that this instruction has already
1639 * been patched because it's part of a loop inside of the one we're
1642 if (brw_inst_opcode(brw
, inst
) == BRW_OPCODE_BREAK
&&
1643 brw_inst_gen4_jump_count(brw
, inst
) == 0) {
1644 brw_inst_set_gen4_jump_count(brw
, inst
, br
*((while_inst
- inst
) + 1));
1645 } else if (brw_inst_opcode(brw
, inst
) == BRW_OPCODE_CONTINUE
&&
1646 brw_inst_gen4_jump_count(brw
, inst
) == 0) {
1647 brw_inst_set_gen4_jump_count(brw
, inst
, br
* (while_inst
- inst
));
1653 brw_WHILE(struct brw_compile
*p
)
1655 struct brw_context
*brw
= p
->brw
;
1656 brw_inst
*insn
, *do_insn
;
1657 unsigned br
= brw_jump_scale(brw
);
1659 if (brw
->gen
>= 7) {
1660 insn
= next_insn(p
, BRW_OPCODE_WHILE
);
1661 do_insn
= get_inner_do_insn(p
);
1663 brw_set_dest(p
, insn
, retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
1664 brw_set_src0(p
, insn
, retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
1665 brw_set_src1(p
, insn
, brw_imm_ud(0));
1666 brw_inst_set_jip(brw
, insn
, br
* (do_insn
- insn
));
1668 brw_inst_set_exec_size(brw
, insn
, p
->compressed
? BRW_EXECUTE_16
1670 } else if (brw
->gen
== 6) {
1671 insn
= next_insn(p
, BRW_OPCODE_WHILE
);
1672 do_insn
= get_inner_do_insn(p
);
1674 brw_set_dest(p
, insn
, brw_imm_w(0));
1675 brw_inst_set_gen6_jump_count(brw
, insn
, br
* (do_insn
- insn
));
1676 brw_set_src0(p
, insn
, retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
1677 brw_set_src1(p
, insn
, retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
1679 brw_inst_set_exec_size(brw
, insn
, p
->compressed
? BRW_EXECUTE_16
1682 if (p
->single_program_flow
) {
1683 insn
= next_insn(p
, BRW_OPCODE_ADD
);
1684 do_insn
= get_inner_do_insn(p
);
1686 brw_set_dest(p
, insn
, brw_ip_reg());
1687 brw_set_src0(p
, insn
, brw_ip_reg());
1688 brw_set_src1(p
, insn
, brw_imm_d((do_insn
- insn
) * 16));
1689 brw_inst_set_exec_size(brw
, insn
, BRW_EXECUTE_1
);
1691 insn
= next_insn(p
, BRW_OPCODE_WHILE
);
1692 do_insn
= get_inner_do_insn(p
);
1694 assert(brw_inst_opcode(brw
, do_insn
) == BRW_OPCODE_DO
);
1696 brw_set_dest(p
, insn
, brw_ip_reg());
1697 brw_set_src0(p
, insn
, brw_ip_reg());
1698 brw_set_src1(p
, insn
, brw_imm_d(0));
1700 brw_inst_set_exec_size(brw
, insn
, brw_inst_exec_size(brw
, do_insn
));
1701 brw_inst_set_gen4_jump_count(brw
, insn
, br
* (do_insn
- insn
+ 1));
1702 brw_inst_set_gen4_pop_count(brw
, insn
, 0);
1704 brw_patch_break_cont(p
, insn
);
1707 brw_inst_set_qtr_control(brw
, insn
, BRW_COMPRESSION_NONE
);
1709 p
->loop_stack_depth
--;
1716 void brw_land_fwd_jump(struct brw_compile
*p
, int jmp_insn_idx
)
1718 struct brw_context
*brw
= p
->brw
;
1719 brw_inst
*jmp_insn
= &p
->store
[jmp_insn_idx
];
1725 assert(brw_inst_opcode(brw
, jmp_insn
) == BRW_OPCODE_JMPI
);
1726 assert(brw_inst_src1_reg_file(brw
, jmp_insn
) == BRW_IMMEDIATE_VALUE
);
1728 brw_inst_set_gen4_jump_count(brw
, jmp_insn
,
1729 jmpi
* (p
->nr_insn
- jmp_insn_idx
- 1));
1732 /* To integrate with the above, it makes sense that the comparison
1733 * instruction should populate the flag register. It might be simpler
1734 * just to use the flag reg for most WM tasks?
1736 void brw_CMP(struct brw_compile
*p
,
1737 struct brw_reg dest
,
1738 unsigned conditional
,
1739 struct brw_reg src0
,
1740 struct brw_reg src1
)
1742 struct brw_context
*brw
= p
->brw
;
1743 brw_inst
*insn
= next_insn(p
, BRW_OPCODE_CMP
);
1745 if (brw
->gen
>= 8) {
1746 /* The CMP instruction appears to behave erratically for floating point
1747 * sources unless the destination type is also float. Overriding it to
1748 * match src0 makes it work in all cases.
1750 dest
.type
= src0
.type
;
1753 brw_inst_set_cond_modifier(brw
, insn
, conditional
);
1754 brw_set_dest(p
, insn
, dest
);
1755 brw_set_src0(p
, insn
, src0
);
1756 brw_set_src1(p
, insn
, src1
);
1758 /* Item WaCMPInstNullDstForcesThreadSwitch in the Haswell Bspec workarounds
1760 * "Any CMP instruction with a null destination must use a {switch}."
1762 * It also applies to other Gen7 platforms (IVB, BYT) even though it isn't
1763 * mentioned on their work-arounds pages.
1765 if (brw
->gen
== 7) {
1766 if (dest
.file
== BRW_ARCHITECTURE_REGISTER_FILE
&&
1767 dest
.nr
== BRW_ARF_NULL
) {
1768 brw_inst_set_thread_control(brw
, insn
, BRW_THREAD_SWITCH
);
1773 /***********************************************************************
1774 * Helpers for the various SEND message types:
1777 /** Extended math function, float[8].
1779 void gen4_math(struct brw_compile
*p
,
1780 struct brw_reg dest
,
1782 unsigned msg_reg_nr
,
1785 unsigned precision
)
1787 struct brw_context
*brw
= p
->brw
;
1788 brw_inst
*insn
= next_insn(p
, BRW_OPCODE_SEND
);
1790 assert(brw
->gen
< 6);
1792 /* Example code doesn't set predicate_control for send
1795 brw_inst_set_pred_control(brw
, insn
, 0);
1796 brw_inst_set_base_mrf(brw
, insn
, msg_reg_nr
);
1798 brw_set_dest(p
, insn
, dest
);
1799 brw_set_src0(p
, insn
, src
);
1800 brw_set_math_message(p
,
1803 src
.type
== BRW_REGISTER_TYPE_D
,
1808 void gen6_math(struct brw_compile
*p
,
1809 struct brw_reg dest
,
1811 struct brw_reg src0
,
1812 struct brw_reg src1
)
1814 struct brw_context
*brw
= p
->brw
;
1815 brw_inst
*insn
= next_insn(p
, BRW_OPCODE_MATH
);
1817 assert(brw
->gen
>= 6);
1819 assert(dest
.file
== BRW_GENERAL_REGISTER_FILE
||
1820 (brw
->gen
>= 7 && dest
.file
== BRW_MESSAGE_REGISTER_FILE
));
1821 assert(src0
.file
== BRW_GENERAL_REGISTER_FILE
||
1822 (brw
->gen
>= 8 && src0
.file
== BRW_IMMEDIATE_VALUE
));
1824 assert(dest
.hstride
== BRW_HORIZONTAL_STRIDE_1
);
1825 if (brw
->gen
== 6) {
1826 assert(src0
.hstride
== BRW_HORIZONTAL_STRIDE_1
);
1827 assert(src1
.hstride
== BRW_HORIZONTAL_STRIDE_1
);
1830 if (function
== BRW_MATH_FUNCTION_INT_DIV_QUOTIENT
||
1831 function
== BRW_MATH_FUNCTION_INT_DIV_REMAINDER
||
1832 function
== BRW_MATH_FUNCTION_INT_DIV_QUOTIENT_AND_REMAINDER
) {
1833 assert(src0
.type
!= BRW_REGISTER_TYPE_F
);
1834 assert(src1
.type
!= BRW_REGISTER_TYPE_F
);
1835 assert(src1
.file
== BRW_GENERAL_REGISTER_FILE
||
1836 (brw
->gen
>= 8 && src1
.file
== BRW_IMMEDIATE_VALUE
));
1838 assert(src0
.type
== BRW_REGISTER_TYPE_F
);
1839 assert(src1
.type
== BRW_REGISTER_TYPE_F
);
1840 if (function
== BRW_MATH_FUNCTION_POW
) {
1841 assert(src1
.file
== BRW_GENERAL_REGISTER_FILE
||
1842 (brw
->gen
>= 8 && src1
.file
== BRW_IMMEDIATE_VALUE
));
1844 assert(src1
.file
== BRW_ARCHITECTURE_REGISTER_FILE
&&
1845 src1
.nr
== BRW_ARF_NULL
);
1849 /* Source modifiers are ignored for extended math instructions on Gen6. */
1850 if (brw
->gen
== 6) {
1851 assert(!src0
.negate
);
1853 assert(!src1
.negate
);
1857 brw_inst_set_math_function(brw
, insn
, function
);
1859 brw_set_dest(p
, insn
, dest
);
1860 brw_set_src0(p
, insn
, src0
);
1861 brw_set_src1(p
, insn
, src1
);
1866 * Write a block of OWORDs (half a GRF each) from the scratch buffer,
1867 * using a constant offset per channel.
1869 * The offset must be aligned to oword size (16 bytes). Used for
1870 * register spilling.
1872 void brw_oword_block_write_scratch(struct brw_compile
*p
,
1877 struct brw_context
*brw
= p
->brw
;
1878 uint32_t msg_control
, msg_type
;
1884 mrf
= retype(mrf
, BRW_REGISTER_TYPE_UD
);
1886 if (num_regs
== 1) {
1887 msg_control
= BRW_DATAPORT_OWORD_BLOCK_2_OWORDS
;
1890 msg_control
= BRW_DATAPORT_OWORD_BLOCK_4_OWORDS
;
1894 /* Set up the message header. This is g0, with g0.2 filled with
1895 * the offset. We don't want to leave our offset around in g0 or
1896 * it'll screw up texture samples, so set it up inside the message
1900 brw_push_insn_state(p
);
1901 brw_set_default_mask_control(p
, BRW_MASK_DISABLE
);
1902 brw_set_default_compression_control(p
, BRW_COMPRESSION_NONE
);
1904 brw_MOV(p
, mrf
, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD
));
1906 /* set message header global offset field (reg 0, element 2) */
1908 retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE
,
1910 2), BRW_REGISTER_TYPE_UD
),
1911 brw_imm_ud(offset
));
1913 brw_pop_insn_state(p
);
1917 struct brw_reg dest
;
1918 brw_inst
*insn
= next_insn(p
, BRW_OPCODE_SEND
);
1919 int send_commit_msg
;
1920 struct brw_reg src_header
= retype(brw_vec8_grf(0, 0),
1921 BRW_REGISTER_TYPE_UW
);
1923 if (brw_inst_qtr_control(brw
, insn
) != BRW_COMPRESSION_NONE
) {
1924 brw_inst_set_qtr_control(brw
, insn
, BRW_COMPRESSION_NONE
);
1925 src_header
= vec16(src_header
);
1927 assert(brw_inst_pred_control(brw
, insn
) == BRW_PREDICATE_NONE
);
1929 brw_inst_set_base_mrf(brw
, insn
, mrf
.nr
);
1931 /* Until gen6, writes followed by reads from the same location
1932 * are not guaranteed to be ordered unless write_commit is set.
1933 * If set, then a no-op write is issued to the destination
1934 * register to set a dependency, and a read from the destination
1935 * can be used to ensure the ordering.
1937 * For gen6, only writes between different threads need ordering
1938 * protection. Our use of DP writes is all about register
1939 * spilling within a thread.
1941 if (brw
->gen
>= 6) {
1942 dest
= retype(vec16(brw_null_reg()), BRW_REGISTER_TYPE_UW
);
1943 send_commit_msg
= 0;
1946 send_commit_msg
= 1;
1949 brw_set_dest(p
, insn
, dest
);
1950 if (brw
->gen
>= 6) {
1951 brw_set_src0(p
, insn
, mrf
);
1953 brw_set_src0(p
, insn
, brw_null_reg());
1957 msg_type
= GEN6_DATAPORT_WRITE_MESSAGE_OWORD_BLOCK_WRITE
;
1959 msg_type
= BRW_DATAPORT_WRITE_MESSAGE_OWORD_BLOCK_WRITE
;
1961 brw_set_dp_write_message(p
,
1963 255, /* binding table index (255=stateless) */
1967 true, /* header_present */
1968 0, /* not a render target */
1969 send_commit_msg
, /* response_length */
1977 * Read a block of owords (half a GRF each) from the scratch buffer
1978 * using a constant index per channel.
1980 * Offset must be aligned to oword size (16 bytes). Used for register
1984 brw_oword_block_read_scratch(struct brw_compile
*p
,
1985 struct brw_reg dest
,
1990 struct brw_context
*brw
= p
->brw
;
1991 uint32_t msg_control
;
1997 mrf
= retype(mrf
, BRW_REGISTER_TYPE_UD
);
1998 dest
= retype(dest
, BRW_REGISTER_TYPE_UW
);
2000 if (num_regs
== 1) {
2001 msg_control
= BRW_DATAPORT_OWORD_BLOCK_2_OWORDS
;
2004 msg_control
= BRW_DATAPORT_OWORD_BLOCK_4_OWORDS
;
2009 brw_push_insn_state(p
);
2010 brw_set_default_compression_control(p
, BRW_COMPRESSION_NONE
);
2011 brw_set_default_mask_control(p
, BRW_MASK_DISABLE
);
2013 brw_MOV(p
, mrf
, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD
));
2015 /* set message header global offset field (reg 0, element 2) */
2017 retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE
,
2019 2), BRW_REGISTER_TYPE_UD
),
2020 brw_imm_ud(offset
));
2022 brw_pop_insn_state(p
);
2026 brw_inst
*insn
= next_insn(p
, BRW_OPCODE_SEND
);
2028 assert(brw_inst_pred_control(brw
, insn
) == 0);
2029 brw_inst_set_qtr_control(brw
, insn
, BRW_COMPRESSION_NONE
);
2031 brw_set_dest(p
, insn
, dest
); /* UW? */
2032 if (brw
->gen
>= 6) {
2033 brw_set_src0(p
, insn
, mrf
);
2035 brw_set_src0(p
, insn
, brw_null_reg());
2036 brw_inst_set_base_mrf(brw
, insn
, mrf
.nr
);
2039 brw_set_dp_read_message(p
,
2041 255, /* binding table index (255=stateless) */
2043 BRW_DATAPORT_READ_MESSAGE_OWORD_BLOCK_READ
, /* msg_type */
2044 BRW_DATAPORT_READ_TARGET_RENDER_CACHE
,
2046 true, /* header_present */
2052 gen7_block_read_scratch(struct brw_compile
*p
,
2053 struct brw_reg dest
,
2057 const struct brw_context
*brw
= p
->brw
;
2058 brw_inst
*insn
= next_insn(p
, BRW_OPCODE_SEND
);
2059 assert(brw_inst_pred_control(brw
, insn
) == BRW_PREDICATE_NONE
);
2061 brw_inst_set_qtr_control(brw
, insn
, BRW_COMPRESSION_NONE
);
2062 brw_set_dest(p
, insn
, retype(dest
, BRW_REGISTER_TYPE_UW
));
2064 /* The HW requires that the header is present; this is to get the g0.5
2067 brw_set_src0(p
, insn
, brw_vec8_grf(0, 0));
2069 /* According to the docs, offset is "A 12-bit HWord offset into the memory
2070 * Immediate Memory buffer as specified by binding table 0xFF." An HWORD
2071 * is 32 bytes, which happens to be the size of a register.
2074 assert(offset
< (1 << 12));
2076 gen7_set_dp_scratch_message(p
, insn
,
2077 false, /* scratch read */
2079 false, /* invalidate after read */
2082 1, /* mlen: just g0 */
2083 num_regs
, /* rlen */
2084 true); /* header present */
2088 * Read a float[4] vector from the data port Data Cache (const buffer).
2089 * Location (in buffer) should be a multiple of 16.
2090 * Used for fetching shader constants.
2092 void brw_oword_block_read(struct brw_compile
*p
,
2093 struct brw_reg dest
,
2096 uint32_t bind_table_index
)
2098 struct brw_context
*brw
= p
->brw
;
2100 /* On newer hardware, offset is in units of owords. */
2104 mrf
= retype(mrf
, BRW_REGISTER_TYPE_UD
);
2106 brw_push_insn_state(p
);
2107 brw_set_default_predicate_control(p
, BRW_PREDICATE_NONE
);
2108 brw_set_default_compression_control(p
, BRW_COMPRESSION_NONE
);
2109 brw_set_default_mask_control(p
, BRW_MASK_DISABLE
);
2111 brw_MOV(p
, mrf
, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD
));
2113 /* set message header global offset field (reg 0, element 2) */
2115 retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE
,
2117 2), BRW_REGISTER_TYPE_UD
),
2118 brw_imm_ud(offset
));
2120 brw_inst
*insn
= next_insn(p
, BRW_OPCODE_SEND
);
2122 /* cast dest to a uword[8] vector */
2123 dest
= retype(vec8(dest
), BRW_REGISTER_TYPE_UW
);
2125 brw_set_dest(p
, insn
, dest
);
2126 if (brw
->gen
>= 6) {
2127 brw_set_src0(p
, insn
, mrf
);
2129 brw_set_src0(p
, insn
, brw_null_reg());
2130 brw_inst_set_base_mrf(brw
, insn
, mrf
.nr
);
2133 brw_set_dp_read_message(p
,
2136 BRW_DATAPORT_OWORD_BLOCK_1_OWORDLOW
,
2137 BRW_DATAPORT_READ_MESSAGE_OWORD_BLOCK_READ
,
2138 BRW_DATAPORT_READ_TARGET_DATA_CACHE
,
2140 true, /* header_present */
2141 1); /* response_length (1 reg, 2 owords!) */
2143 brw_pop_insn_state(p
);
2147 void brw_fb_WRITE(struct brw_compile
*p
,
2149 unsigned msg_reg_nr
,
2150 struct brw_reg src0
,
2151 unsigned msg_control
,
2152 unsigned binding_table_index
,
2153 unsigned msg_length
,
2154 unsigned response_length
,
2156 bool header_present
)
2158 struct brw_context
*brw
= p
->brw
;
2161 struct brw_reg dest
;
2163 if (dispatch_width
== 16)
2164 dest
= retype(vec16(brw_null_reg()), BRW_REGISTER_TYPE_UW
);
2166 dest
= retype(vec8(brw_null_reg()), BRW_REGISTER_TYPE_UW
);
2168 if (brw
->gen
>= 6) {
2169 insn
= next_insn(p
, BRW_OPCODE_SENDC
);
2171 insn
= next_insn(p
, BRW_OPCODE_SEND
);
2173 brw_inst_set_qtr_control(brw
, insn
, BRW_COMPRESSION_NONE
);
2175 if (brw
->gen
>= 6) {
2176 /* headerless version, just submit color payload */
2177 src0
= brw_message_reg(msg_reg_nr
);
2179 msg_type
= GEN6_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_WRITE
;
2181 brw_inst_set_base_mrf(brw
, insn
, msg_reg_nr
);
2183 msg_type
= BRW_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_WRITE
;
2186 brw_set_dest(p
, insn
, dest
);
2187 brw_set_src0(p
, insn
, src0
);
2188 brw_set_dp_write_message(p
,
2190 binding_table_index
,
2195 eot
, /* last render target write */
2198 0 /* send_commit_msg */);
2203 * Texture sample instruction.
2204 * Note: the msg_type plus msg_length values determine exactly what kind
2205 * of sampling operation is performed. See volume 4, page 161 of docs.
2207 void brw_SAMPLE(struct brw_compile
*p
,
2208 struct brw_reg dest
,
2209 unsigned msg_reg_nr
,
2210 struct brw_reg src0
,
2211 unsigned binding_table_index
,
2214 unsigned response_length
,
2215 unsigned msg_length
,
2216 unsigned header_present
,
2218 unsigned return_format
)
2220 struct brw_context
*brw
= p
->brw
;
2223 if (msg_reg_nr
!= -1)
2224 gen6_resolve_implied_move(p
, &src0
, msg_reg_nr
);
2226 insn
= next_insn(p
, BRW_OPCODE_SEND
);
2227 brw_inst_set_pred_control(brw
, insn
, BRW_PREDICATE_NONE
); /* XXX */
2229 /* From the 965 PRM (volume 4, part 1, section 14.2.41):
2231 * "Instruction compression is not allowed for this instruction (that
2232 * is, send). The hardware behavior is undefined if this instruction is
2233 * set as compressed. However, compress control can be set to "SecHalf"
2234 * to affect the EMask generation."
2236 * No similar wording is found in later PRMs, but there are examples
2237 * utilizing send with SecHalf. More importantly, SIMD8 sampler messages
2238 * are allowed in SIMD16 mode and they could not work without SecHalf. For
2239 * these reasons, we allow BRW_COMPRESSION_2NDHALF here.
2241 if (brw_inst_qtr_control(brw
, insn
) != BRW_COMPRESSION_2NDHALF
)
2242 brw_inst_set_qtr_control(brw
, insn
, BRW_COMPRESSION_NONE
);
2245 brw_inst_set_base_mrf(brw
, insn
, msg_reg_nr
);
2247 brw_set_dest(p
, insn
, dest
);
2248 brw_set_src0(p
, insn
, src0
);
2249 brw_set_sampler_message(p
, insn
,
2250 binding_table_index
,
2260 /* All these variables are pretty confusing - we might be better off
2261 * using bitmasks and macros for this, in the old style. Or perhaps
2262 * just having the caller instantiate the fields in dword3 itself.
2264 void brw_urb_WRITE(struct brw_compile
*p
,
2265 struct brw_reg dest
,
2266 unsigned msg_reg_nr
,
2267 struct brw_reg src0
,
2268 enum brw_urb_write_flags flags
,
2269 unsigned msg_length
,
2270 unsigned response_length
,
2274 struct brw_context
*brw
= p
->brw
;
2277 gen6_resolve_implied_move(p
, &src0
, msg_reg_nr
);
2279 if (brw
->gen
>= 7 && !(flags
& BRW_URB_WRITE_USE_CHANNEL_MASKS
)) {
2280 /* Enable Channel Masks in the URB_WRITE_HWORD message header */
2281 brw_push_insn_state(p
);
2282 brw_set_default_access_mode(p
, BRW_ALIGN_1
);
2283 brw_set_default_mask_control(p
, BRW_MASK_DISABLE
);
2284 brw_OR(p
, retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE
, msg_reg_nr
, 5),
2285 BRW_REGISTER_TYPE_UD
),
2286 retype(brw_vec1_grf(0, 5), BRW_REGISTER_TYPE_UD
),
2287 brw_imm_ud(0xff00));
2288 brw_pop_insn_state(p
);
2291 insn
= next_insn(p
, BRW_OPCODE_SEND
);
2293 assert(msg_length
< BRW_MAX_MRF
);
2295 brw_set_dest(p
, insn
, dest
);
2296 brw_set_src0(p
, insn
, src0
);
2297 brw_set_src1(p
, insn
, brw_imm_d(0));
2300 brw_inst_set_base_mrf(brw
, insn
, msg_reg_nr
);
2302 brw_set_urb_message(p
,
2312 brw_find_next_block_end(struct brw_compile
*p
, int start_offset
)
2315 void *store
= p
->store
;
2316 const struct brw_context
*brw
= p
->brw
;
2318 for (offset
= next_offset(brw
, store
, start_offset
);
2319 offset
< p
->next_insn_offset
;
2320 offset
= next_offset(brw
, store
, offset
)) {
2321 brw_inst
*insn
= store
+ offset
;
2323 switch (brw_inst_opcode(brw
, insn
)) {
2324 case BRW_OPCODE_ENDIF
:
2325 case BRW_OPCODE_ELSE
:
2326 case BRW_OPCODE_WHILE
:
2327 case BRW_OPCODE_HALT
:
2335 /* There is no DO instruction on gen6, so to find the end of the loop
2336 * we have to see if the loop is jumping back before our start
2340 brw_find_loop_end(struct brw_compile
*p
, int start_offset
)
2342 struct brw_context
*brw
= p
->brw
;
2344 int scale
= 16 / brw_jump_scale(brw
);
2345 void *store
= p
->store
;
2347 assert(brw
->gen
>= 6);
2349 /* Always start after the instruction (such as a WHILE) we're trying to fix
2352 for (offset
= next_offset(brw
, store
, start_offset
);
2353 offset
< p
->next_insn_offset
;
2354 offset
= next_offset(brw
, store
, offset
)) {
2355 brw_inst
*insn
= store
+ offset
;
2357 if (brw_inst_opcode(brw
, insn
) == BRW_OPCODE_WHILE
) {
2358 int jip
= brw
->gen
== 6 ? brw_inst_gen6_jump_count(brw
, insn
)
2359 : brw_inst_jip(brw
, insn
);
2360 if (offset
+ jip
* scale
<= start_offset
)
2364 assert(!"not reached");
2365 return start_offset
;
2368 /* After program generation, go back and update the UIP and JIP of
2369 * BREAK, CONT, and HALT instructions to their correct locations.
2372 brw_set_uip_jip(struct brw_compile
*p
)
2374 struct brw_context
*brw
= p
->brw
;
2376 int br
= brw_jump_scale(brw
);
2377 int scale
= 16 / br
;
2378 void *store
= p
->store
;
2383 for (offset
= 0; offset
< p
->next_insn_offset
;
2384 offset
= next_offset(brw
, store
, offset
)) {
2385 brw_inst
*insn
= store
+ offset
;
2387 if (brw_inst_cmpt_control(brw
, insn
)) {
2388 /* Fixups for compacted BREAK/CONTINUE not supported yet. */
2389 assert(brw_inst_opcode(brw
, insn
) != BRW_OPCODE_BREAK
&&
2390 brw_inst_opcode(brw
, insn
) != BRW_OPCODE_CONTINUE
&&
2391 brw_inst_opcode(brw
, insn
) != BRW_OPCODE_HALT
);
2395 int block_end_offset
= brw_find_next_block_end(p
, offset
);
2396 switch (brw_inst_opcode(brw
, insn
)) {
2397 case BRW_OPCODE_BREAK
:
2398 assert(block_end_offset
!= 0);
2399 brw_inst_set_jip(brw
, insn
, (block_end_offset
- offset
) / scale
);
2400 /* Gen7 UIP points to WHILE; Gen6 points just after it */
2401 brw_inst_set_uip(brw
, insn
,
2402 (brw_find_loop_end(p
, offset
) - offset
+
2403 (brw
->gen
== 6 ? 16 : 0)) / scale
);
2405 case BRW_OPCODE_CONTINUE
:
2406 assert(block_end_offset
!= 0);
2407 brw_inst_set_jip(brw
, insn
, (block_end_offset
- offset
) / scale
);
2408 brw_inst_set_uip(brw
, insn
,
2409 (brw_find_loop_end(p
, offset
) - offset
) / scale
);
2411 assert(brw_inst_uip(brw
, insn
) != 0);
2412 assert(brw_inst_jip(brw
, insn
) != 0);
2415 case BRW_OPCODE_ENDIF
:
2416 if (block_end_offset
== 0)
2417 brw_inst_set_jip(brw
, insn
, 1 * br
);
2419 brw_inst_set_jip(brw
, insn
, (block_end_offset
- offset
) / scale
);
2422 case BRW_OPCODE_HALT
:
2423 /* From the Sandy Bridge PRM (volume 4, part 2, section 8.3.19):
2425 * "In case of the halt instruction not inside any conditional
2426 * code block, the value of <JIP> and <UIP> should be the
2427 * same. In case of the halt instruction inside conditional code
2428 * block, the <UIP> should be the end of the program, and the
2429 * <JIP> should be end of the most inner conditional code block."
2431 * The uip will have already been set by whoever set up the
2434 if (block_end_offset
== 0) {
2435 brw_inst_set_jip(brw
, insn
, brw_inst_uip(brw
, insn
));
2437 brw_inst_set_jip(brw
, insn
, (block_end_offset
- offset
) / scale
);
2439 assert(brw_inst_uip(brw
, insn
) != 0);
2440 assert(brw_inst_jip(brw
, insn
) != 0);
2446 void brw_ff_sync(struct brw_compile
*p
,
2447 struct brw_reg dest
,
2448 unsigned msg_reg_nr
,
2449 struct brw_reg src0
,
2451 unsigned response_length
,
2454 struct brw_context
*brw
= p
->brw
;
2457 gen6_resolve_implied_move(p
, &src0
, msg_reg_nr
);
2459 insn
= next_insn(p
, BRW_OPCODE_SEND
);
2460 brw_set_dest(p
, insn
, dest
);
2461 brw_set_src0(p
, insn
, src0
);
2462 brw_set_src1(p
, insn
, brw_imm_d(0));
2465 brw_inst_set_base_mrf(brw
, insn
, msg_reg_nr
);
2467 brw_set_ff_sync_message(p
,
2475 * Emit the SEND instruction necessary to generate stream output data on Gen6
2476 * (for transform feedback).
2478 * If send_commit_msg is true, this is the last piece of stream output data
2479 * from this thread, so send the data as a committed write. According to the
2480 * Sandy Bridge PRM (volume 2 part 1, section 4.5.1):
2482 * "Prior to End of Thread with a URB_WRITE, the kernel must ensure all
2483 * writes are complete by sending the final write as a committed write."
2486 brw_svb_write(struct brw_compile
*p
,
2487 struct brw_reg dest
,
2488 unsigned msg_reg_nr
,
2489 struct brw_reg src0
,
2490 unsigned binding_table_index
,
2491 bool send_commit_msg
)
2495 gen6_resolve_implied_move(p
, &src0
, msg_reg_nr
);
2497 insn
= next_insn(p
, BRW_OPCODE_SEND
);
2498 brw_set_dest(p
, insn
, dest
);
2499 brw_set_src0(p
, insn
, src0
);
2500 brw_set_src1(p
, insn
, brw_imm_d(0));
2501 brw_set_dp_write_message(p
, insn
,
2502 binding_table_index
,
2503 0, /* msg_control: ignored */
2504 GEN6_DATAPORT_WRITE_MESSAGE_STREAMED_VB_WRITE
,
2506 true, /* header_present */
2507 0, /* last_render_target: ignored */
2508 send_commit_msg
, /* response_length */
2509 0, /* end_of_thread */
2510 send_commit_msg
); /* send_commit_msg */
2514 brw_set_dp_untyped_atomic_message(struct brw_compile
*p
,
2517 unsigned bind_table_index
,
2518 unsigned msg_length
,
2519 unsigned response_length
,
2520 bool header_present
)
2522 const struct brw_context
*brw
= p
->brw
;
2524 unsigned msg_control
=
2525 atomic_op
| /* Atomic Operation Type: BRW_AOP_* */
2526 (response_length
? 1 << 5 : 0); /* Return data expected */
2528 if (brw
->gen
>= 8 || brw
->is_haswell
) {
2529 brw_set_message_descriptor(p
, insn
, HSW_SFID_DATAPORT_DATA_CACHE_1
,
2530 msg_length
, response_length
,
2531 header_present
, false);
2534 if (brw_inst_access_mode(brw
, insn
) == BRW_ALIGN_1
) {
2535 if (brw_inst_exec_size(brw
, insn
) != BRW_EXECUTE_16
)
2536 msg_control
|= 1 << 4; /* SIMD8 mode */
2538 brw_inst_set_dp_msg_type(brw
, insn
,
2539 HSW_DATAPORT_DC_PORT1_UNTYPED_ATOMIC_OP
);
2541 brw_inst_set_dp_msg_type(brw
, insn
,
2542 HSW_DATAPORT_DC_PORT1_UNTYPED_ATOMIC_OP_SIMD4X2
);
2545 brw_set_message_descriptor(p
, insn
, GEN7_SFID_DATAPORT_DATA_CACHE
,
2546 msg_length
, response_length
,
2547 header_present
, false);
2549 brw_inst_set_dp_msg_type(brw
, insn
, GEN7_DATAPORT_DC_UNTYPED_ATOMIC_OP
);
2551 if (brw_inst_exec_size(brw
, insn
) != BRW_EXECUTE_16
)
2552 msg_control
|= 1 << 4; /* SIMD8 mode */
2555 brw_inst_set_binding_table_index(brw
, insn
, bind_table_index
);
2556 brw_inst_set_dp_msg_control(brw
, insn
, msg_control
);
2560 brw_untyped_atomic(struct brw_compile
*p
,
2561 struct brw_reg dest
,
2564 unsigned bind_table_index
,
2565 unsigned msg_length
,
2566 unsigned response_length
) {
2567 const struct brw_context
*brw
= p
->brw
;
2568 brw_inst
*insn
= brw_next_insn(p
, BRW_OPCODE_SEND
);
2570 brw_set_dest(p
, insn
, retype(dest
, BRW_REGISTER_TYPE_UD
));
2571 brw_set_src0(p
, insn
, retype(mrf
, BRW_REGISTER_TYPE_UD
));
2572 brw_set_src1(p
, insn
, brw_imm_d(0));
2573 brw_set_dp_untyped_atomic_message(
2574 p
, insn
, atomic_op
, bind_table_index
, msg_length
, response_length
,
2575 brw_inst_access_mode(brw
, insn
) == BRW_ALIGN_1
);
2579 brw_set_dp_untyped_surface_read_message(struct brw_compile
*p
,
2581 unsigned bind_table_index
,
2582 unsigned msg_length
,
2583 unsigned response_length
,
2584 bool header_present
)
2586 const struct brw_context
*brw
= p
->brw
;
2587 const unsigned dispatch_width
=
2588 (brw_inst_exec_size(brw
, insn
) == BRW_EXECUTE_16
? 16 : 8);
2589 const unsigned num_channels
= response_length
/ (dispatch_width
/ 8);
2591 if (brw
->gen
>= 8 || brw
->is_haswell
) {
2592 brw_set_message_descriptor(p
, insn
, HSW_SFID_DATAPORT_DATA_CACHE_1
,
2593 msg_length
, response_length
,
2594 header_present
, false);
2596 brw_inst_set_dp_msg_type(brw
, insn
,
2597 HSW_DATAPORT_DC_PORT1_UNTYPED_SURFACE_READ
);
2599 brw_set_message_descriptor(p
, insn
, GEN7_SFID_DATAPORT_DATA_CACHE
,
2600 msg_length
, response_length
,
2601 header_present
, false);
2603 brw_inst_set_dp_msg_type(brw
, insn
,
2604 GEN7_DATAPORT_DC_UNTYPED_SURFACE_READ
);
2607 /* Set mask of 32-bit channels to drop. */
2608 unsigned msg_control
= (0xf & (0xf << num_channels
));
2610 if (brw_inst_access_mode(brw
, insn
) == BRW_ALIGN_1
) {
2611 if (dispatch_width
== 16)
2612 msg_control
|= 1 << 4; /* SIMD16 mode */
2614 msg_control
|= 2 << 4; /* SIMD8 mode */
2617 brw_inst_set_binding_table_index(brw
, insn
, bind_table_index
);
2618 brw_inst_set_dp_msg_control(brw
, insn
, msg_control
);
2622 brw_untyped_surface_read(struct brw_compile
*p
,
2623 struct brw_reg dest
,
2625 unsigned bind_table_index
,
2626 unsigned msg_length
,
2627 unsigned response_length
)
2629 const struct brw_context
*brw
= p
->brw
;
2630 brw_inst
*insn
= next_insn(p
, BRW_OPCODE_SEND
);
2632 brw_set_dest(p
, insn
, retype(dest
, BRW_REGISTER_TYPE_UD
));
2633 brw_set_src0(p
, insn
, retype(mrf
, BRW_REGISTER_TYPE_UD
));
2634 brw_set_dp_untyped_surface_read_message(
2635 p
, insn
, bind_table_index
, msg_length
, response_length
,
2636 brw_inst_access_mode(brw
, insn
) == BRW_ALIGN_1
);
2640 brw_pixel_interpolator_query(struct brw_compile
*p
,
2641 struct brw_reg dest
,
2646 unsigned msg_length
,
2647 unsigned response_length
)
2649 const struct brw_context
*brw
= p
->brw
;
2650 struct brw_inst
*insn
= next_insn(p
, BRW_OPCODE_SEND
);
2652 brw_set_dest(p
, insn
, dest
);
2653 brw_set_src0(p
, insn
, mrf
);
2654 brw_set_message_descriptor(p
, insn
, GEN7_SFID_PIXEL_INTERPOLATOR
,
2655 msg_length
, response_length
,
2656 false /* header is never present for PI */,
2659 brw_inst_set_pi_simd_mode(
2660 brw
, insn
, brw_inst_exec_size(brw
, insn
) == BRW_EXECUTE_16
);
2661 brw_inst_set_pi_slot_group(brw
, insn
, 0); /* zero unless 32/64px dispatch */
2662 brw_inst_set_pi_nopersp(brw
, insn
, noperspective
);
2663 brw_inst_set_pi_message_type(brw
, insn
, mode
);
2664 brw_inst_set_pi_message_data(brw
, insn
, data
);
2668 * This instruction is generated as a single-channel align1 instruction by
2669 * both the VS and FS stages when using INTEL_DEBUG=shader_time.
2671 * We can't use the typed atomic op in the FS because that has the execution
2672 * mask ANDed with the pixel mask, but we just want to write the one dword for
2675 * We don't use the SIMD4x2 atomic ops in the VS because want to just write
2676 * one u32. So we use the same untyped atomic write message as the pixel
2679 * The untyped atomic operation requires a BUFFER surface type with RAW
2680 * format, and is only accessible through the legacy DATA_CACHE dataport
2683 void brw_shader_time_add(struct brw_compile
*p
,
2684 struct brw_reg payload
,
2685 uint32_t surf_index
)
2687 assert(p
->brw
->gen
>= 7);
2689 brw_push_insn_state(p
);
2690 brw_set_default_access_mode(p
, BRW_ALIGN_1
);
2691 brw_set_default_mask_control(p
, BRW_MASK_DISABLE
);
2692 brw_inst
*send
= brw_next_insn(p
, BRW_OPCODE_SEND
);
2693 brw_pop_insn_state(p
);
2695 /* We use brw_vec1_reg and unmasked because we want to increment the given
2698 brw_set_dest(p
, send
, brw_vec1_reg(BRW_ARCHITECTURE_REGISTER_FILE
,
2700 brw_set_src0(p
, send
, brw_vec1_reg(payload
.file
,
2702 brw_set_dp_untyped_atomic_message(p
, send
, BRW_AOP_ADD
, surf_index
,
2703 2 /* message length */,
2704 0 /* response length */,
2705 false /* header present */);