Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 1 | /* |
| 2 | Copyright (C) Intel Corp. 2006. All Rights Reserved. |
| 3 | Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to |
| 4 | develop this 3D driver. |
| 5 | |
| 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: |
| 13 | |
| 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. |
| 17 | |
| 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. |
| 25 | |
| 26 | **********************************************************************/ |
| 27 | /* |
| 28 | * Authors: |
| 29 | * Keith Whitwell <keith@tungstengraphics.com> |
| 30 | */ |
| 31 | |
| 32 | #include <string.h> |
| 33 | |
| 34 | #include "brw_context.h" |
| 35 | #include "brw_defines.h" |
| 36 | #include "brw_eu.h" |
| 37 | |
| 38 | #include "ralloc.h" |
| 39 | |
| 40 | /*********************************************************************** |
| 41 | * Internal helper for constructing instructions |
| 42 | */ |
| 43 | |
| 44 | static void guess_execution_size(struct brw_compile *p, |
| 45 | struct brw_instruction *insn, |
| 46 | struct brw_reg reg) |
| 47 | { |
| 48 | if (reg.width == BRW_WIDTH_8 && p->compressed) |
| 49 | insn->header.execution_size = BRW_EXECUTE_16; |
| 50 | else |
| 51 | insn->header.execution_size = reg.width; /* note - definitions are compatible */ |
| 52 | } |
| 53 | |
| 54 | |
| 55 | /** |
| 56 | * Prior to Sandybridge, the SEND instruction accepted non-MRF source |
| 57 | * registers, implicitly moving the operand to a message register. |
| 58 | * |
| 59 | * On Sandybridge, this is no longer the case. This function performs the |
| 60 | * explicit move; it should be called before emitting a SEND instruction. |
| 61 | */ |
| 62 | void |
| 63 | gen6_resolve_implied_move(struct brw_compile *p, |
| 64 | struct brw_reg *src, |
| 65 | GLuint msg_reg_nr) |
| 66 | { |
| 67 | struct intel_context *intel = &p->brw->intel; |
| 68 | if (intel->gen < 6) |
| 69 | return; |
| 70 | |
| 71 | if (src->file == BRW_MESSAGE_REGISTER_FILE) |
| 72 | return; |
| 73 | |
| 74 | if (src->file != BRW_ARCHITECTURE_REGISTER_FILE || src->nr != BRW_ARF_NULL) { |
| 75 | brw_push_insn_state(p); |
| 76 | brw_set_mask_control(p, BRW_MASK_DISABLE); |
| 77 | brw_set_compression_control(p, BRW_COMPRESSION_NONE); |
| 78 | brw_MOV(p, retype(brw_message_reg(msg_reg_nr), BRW_REGISTER_TYPE_UD), |
| 79 | retype(*src, BRW_REGISTER_TYPE_UD)); |
| 80 | brw_pop_insn_state(p); |
| 81 | } |
| 82 | *src = brw_message_reg(msg_reg_nr); |
| 83 | } |
| 84 | |
| 85 | static void |
| 86 | gen7_convert_mrf_to_grf(struct brw_compile *p, struct brw_reg *reg) |
| 87 | { |
| 88 | /* From the BSpec / ISA Reference / send - [DevIVB+]: |
| 89 | * "The send with EOT should use register space R112-R127 for <src>. This is |
| 90 | * to enable loading of a new thread into the same slot while the message |
| 91 | * with EOT for current thread is pending dispatch." |
| 92 | * |
| 93 | * Since we're pretending to have 16 MRFs anyway, we may as well use the |
| 94 | * registers required for messages with EOT. |
| 95 | */ |
| 96 | struct intel_context *intel = &p->brw->intel; |
| 97 | if (intel->gen == 7 && reg->file == BRW_MESSAGE_REGISTER_FILE) { |
| 98 | reg->file = BRW_GENERAL_REGISTER_FILE; |
| 99 | reg->nr += GEN7_MRF_HACK_START; |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | |
| 104 | void |
| 105 | brw_set_dest(struct brw_compile *p, struct brw_instruction *insn, |
| 106 | struct brw_reg dest) |
| 107 | { |
| 108 | if (dest.file != BRW_ARCHITECTURE_REGISTER_FILE && |
| 109 | dest.file != BRW_MESSAGE_REGISTER_FILE) |
| 110 | assert(dest.nr < 128); |
| 111 | |
| 112 | gen7_convert_mrf_to_grf(p, &dest); |
| 113 | |
| 114 | insn->bits1.da1.dest_reg_file = dest.file; |
| 115 | insn->bits1.da1.dest_reg_type = dest.type; |
| 116 | insn->bits1.da1.dest_address_mode = dest.address_mode; |
| 117 | |
| 118 | if (dest.address_mode == BRW_ADDRESS_DIRECT) { |
| 119 | insn->bits1.da1.dest_reg_nr = dest.nr; |
| 120 | |
| 121 | if (insn->header.access_mode == BRW_ALIGN_1) { |
| 122 | insn->bits1.da1.dest_subreg_nr = dest.subnr; |
| 123 | if (dest.hstride == BRW_HORIZONTAL_STRIDE_0) |
| 124 | dest.hstride = BRW_HORIZONTAL_STRIDE_1; |
| 125 | insn->bits1.da1.dest_horiz_stride = dest.hstride; |
| 126 | } |
| 127 | else { |
| 128 | insn->bits1.da16.dest_subreg_nr = dest.subnr / 16; |
| 129 | insn->bits1.da16.dest_writemask = dest.dw1.bits.writemask; |
| 130 | /* even ignored in da16, still need to set as '01' */ |
| 131 | insn->bits1.da16.dest_horiz_stride = 1; |
| 132 | } |
| 133 | } |
| 134 | else { |
| 135 | insn->bits1.ia1.dest_subreg_nr = dest.subnr; |
| 136 | |
| 137 | /* These are different sizes in align1 vs align16: |
| 138 | */ |
| 139 | if (insn->header.access_mode == BRW_ALIGN_1) { |
| 140 | insn->bits1.ia1.dest_indirect_offset = dest.dw1.bits.indirect_offset; |
| 141 | if (dest.hstride == BRW_HORIZONTAL_STRIDE_0) |
| 142 | dest.hstride = BRW_HORIZONTAL_STRIDE_1; |
| 143 | insn->bits1.ia1.dest_horiz_stride = dest.hstride; |
| 144 | } |
| 145 | else { |
| 146 | insn->bits1.ia16.dest_indirect_offset = dest.dw1.bits.indirect_offset; |
| 147 | /* even ignored in da16, still need to set as '01' */ |
| 148 | insn->bits1.ia16.dest_horiz_stride = 1; |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | /* NEW: Set the execution size based on dest.width and |
| 153 | * insn->compression_control: |
| 154 | */ |
| 155 | guess_execution_size(p, insn, dest); |
| 156 | } |
| 157 | |
| 158 | extern int reg_type_size[]; |
| 159 | |
| 160 | static void |
| 161 | validate_reg(struct brw_instruction *insn, struct brw_reg reg) |
| 162 | { |
| 163 | int hstride_for_reg[] = {0, 1, 2, 4}; |
| 164 | int vstride_for_reg[] = {0, 1, 2, 4, 8, 16, 32, 64, 128, 256}; |
| 165 | int width_for_reg[] = {1, 2, 4, 8, 16}; |
Damien Lespiau | 6e83eb6 | 2013-01-25 15:12:12 +0000 | [diff] [blame] | 166 | int execsize_for_reg[] = {1, 2, 4, 8, 16, 32}; |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 167 | int width, hstride, vstride, execsize; |
| 168 | |
| 169 | if (reg.file == BRW_IMMEDIATE_VALUE) { |
| 170 | /* 3.3.6: Region Parameters. Restriction: Immediate vectors |
| 171 | * mean the destination has to be 128-bit aligned and the |
| 172 | * destination horiz stride has to be a word. |
| 173 | */ |
| 174 | if (reg.type == BRW_REGISTER_TYPE_V) { |
| 175 | assert(hstride_for_reg[insn->bits1.da1.dest_horiz_stride] * |
| 176 | reg_type_size[insn->bits1.da1.dest_reg_type] == 2); |
| 177 | } |
| 178 | |
| 179 | return; |
| 180 | } |
| 181 | |
| 182 | if (reg.file == BRW_ARCHITECTURE_REGISTER_FILE && |
| 183 | reg.file == BRW_ARF_NULL) |
| 184 | return; |
| 185 | |
| 186 | assert(reg.hstride >= 0 && reg.hstride < Elements(hstride_for_reg)); |
| 187 | hstride = hstride_for_reg[reg.hstride]; |
| 188 | |
| 189 | if (reg.vstride == 0xf) { |
| 190 | vstride = -1; |
| 191 | } else { |
| 192 | assert(reg.vstride >= 0 && reg.vstride < Elements(vstride_for_reg)); |
| 193 | vstride = vstride_for_reg[reg.vstride]; |
| 194 | } |
| 195 | |
| 196 | assert(reg.width >= 0 && reg.width < Elements(width_for_reg)); |
| 197 | width = width_for_reg[reg.width]; |
| 198 | |
| 199 | assert(insn->header.execution_size >= 0 && |
| 200 | insn->header.execution_size < Elements(execsize_for_reg)); |
| 201 | execsize = execsize_for_reg[insn->header.execution_size]; |
| 202 | |
| 203 | /* Restrictions from 3.3.10: Register Region Restrictions. */ |
| 204 | /* 3. */ |
| 205 | assert(execsize >= width); |
| 206 | |
Damien Lespiau | e7cca1a | 2013-01-27 02:06:22 +0000 | [diff] [blame] | 207 | /* FIXME: the assembler has a lot of code written that triggers the |
| 208 | * assertions commented it below. Let's paper over it (for now!) until we |
| 209 | * can re-validate the shaders with those little inconsistencies fixed. */ |
| 210 | |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 211 | /* 4. */ |
Damien Lespiau | e7cca1a | 2013-01-27 02:06:22 +0000 | [diff] [blame] | 212 | #if 0 |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 213 | if (execsize == width && hstride != 0) { |
| 214 | assert(vstride == -1 || vstride == width * hstride); |
| 215 | } |
Damien Lespiau | e7cca1a | 2013-01-27 02:06:22 +0000 | [diff] [blame] | 216 | #endif |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 217 | |
| 218 | /* 5. */ |
| 219 | if (execsize == width && hstride == 0) { |
| 220 | /* no restriction on vstride. */ |
| 221 | } |
| 222 | |
| 223 | /* 6. */ |
Damien Lespiau | e7cca1a | 2013-01-27 02:06:22 +0000 | [diff] [blame] | 224 | #if 0 |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 225 | if (width == 1) { |
| 226 | assert(hstride == 0); |
| 227 | } |
Damien Lespiau | e7cca1a | 2013-01-27 02:06:22 +0000 | [diff] [blame] | 228 | #endif |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 229 | |
| 230 | /* 7. */ |
Damien Lespiau | e7cca1a | 2013-01-27 02:06:22 +0000 | [diff] [blame] | 231 | #if 0 |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 232 | if (execsize == 1 && width == 1) { |
| 233 | assert(hstride == 0); |
| 234 | assert(vstride == 0); |
| 235 | } |
Damien Lespiau | e7cca1a | 2013-01-27 02:06:22 +0000 | [diff] [blame] | 236 | #endif |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 237 | |
| 238 | /* 8. */ |
| 239 | if (vstride == 0 && hstride == 0) { |
| 240 | assert(width == 1); |
| 241 | } |
| 242 | |
| 243 | /* 10. Check destination issues. */ |
| 244 | } |
| 245 | |
| 246 | void |
| 247 | brw_set_src0(struct brw_compile *p, struct brw_instruction *insn, |
| 248 | struct brw_reg reg) |
| 249 | { |
| 250 | struct brw_context *brw = p->brw; |
| 251 | struct intel_context *intel = &brw->intel; |
| 252 | |
Damien Lespiau | 103edcc | 2013-01-25 15:13:30 +0000 | [diff] [blame] | 253 | if (reg.file != BRW_ARCHITECTURE_REGISTER_FILE) |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 254 | assert(reg.nr < 128); |
| 255 | |
| 256 | gen7_convert_mrf_to_grf(p, ®); |
| 257 | |
| 258 | if (intel->gen >= 6 && (insn->header.opcode == BRW_OPCODE_SEND || |
| 259 | insn->header.opcode == BRW_OPCODE_SENDC)) { |
| 260 | /* Any source modifiers or regions will be ignored, since this just |
| 261 | * identifies the MRF/GRF to start reading the message contents from. |
| 262 | * Check for some likely failures. |
| 263 | */ |
| 264 | assert(!reg.negate); |
| 265 | assert(!reg.abs); |
| 266 | assert(reg.address_mode == BRW_ADDRESS_DIRECT); |
| 267 | } |
| 268 | |
| 269 | validate_reg(insn, reg); |
| 270 | |
| 271 | insn->bits1.da1.src0_reg_file = reg.file; |
| 272 | insn->bits1.da1.src0_reg_type = reg.type; |
| 273 | insn->bits2.da1.src0_abs = reg.abs; |
| 274 | insn->bits2.da1.src0_negate = reg.negate; |
| 275 | insn->bits2.da1.src0_address_mode = reg.address_mode; |
| 276 | |
| 277 | if (reg.file == BRW_IMMEDIATE_VALUE) { |
| 278 | insn->bits3.ud = reg.dw1.ud; |
| 279 | |
| 280 | /* Required to set some fields in src1 as well: |
| 281 | */ |
Damien Lespiau | e7cca1a | 2013-01-27 02:06:22 +0000 | [diff] [blame] | 282 | |
| 283 | /* FIXME: This looks quite wrong, tempering with src1. I did not find |
| 284 | * anything in the bspec that was hinting it woud be needed when setting |
| 285 | * src0. before removing this one needs to run piglit. |
| 286 | |
| 287 | insn->bits1.da1.src1_reg_file = 0; |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 288 | insn->bits1.da1.src1_reg_type = reg.type; |
Damien Lespiau | e7cca1a | 2013-01-27 02:06:22 +0000 | [diff] [blame] | 289 | */ |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 290 | } |
| 291 | else |
| 292 | { |
| 293 | if (reg.address_mode == BRW_ADDRESS_DIRECT) { |
| 294 | if (insn->header.access_mode == BRW_ALIGN_1) { |
| 295 | insn->bits2.da1.src0_subreg_nr = reg.subnr; |
| 296 | insn->bits2.da1.src0_reg_nr = reg.nr; |
| 297 | } |
| 298 | else { |
| 299 | insn->bits2.da16.src0_subreg_nr = reg.subnr / 16; |
| 300 | insn->bits2.da16.src0_reg_nr = reg.nr; |
| 301 | } |
| 302 | } |
| 303 | else { |
| 304 | insn->bits2.ia1.src0_subreg_nr = reg.subnr; |
| 305 | |
| 306 | if (insn->header.access_mode == BRW_ALIGN_1) { |
| 307 | insn->bits2.ia1.src0_indirect_offset = reg.dw1.bits.indirect_offset; |
| 308 | } |
| 309 | else { |
| 310 | insn->bits2.ia16.src0_subreg_nr = reg.dw1.bits.indirect_offset; |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | if (insn->header.access_mode == BRW_ALIGN_1) { |
Damien Lespiau | e7cca1a | 2013-01-27 02:06:22 +0000 | [diff] [blame] | 315 | |
| 316 | /* FIXME: While this is correct, if the assembler uses that code path |
| 317 | * the opcode generated are different and thus needs a validation |
| 318 | * pass. |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 319 | if (reg.width == BRW_WIDTH_1 && |
| 320 | insn->header.execution_size == BRW_EXECUTE_1) { |
| 321 | insn->bits2.da1.src0_horiz_stride = BRW_HORIZONTAL_STRIDE_0; |
| 322 | insn->bits2.da1.src0_width = BRW_WIDTH_1; |
| 323 | insn->bits2.da1.src0_vert_stride = BRW_VERTICAL_STRIDE_0; |
| 324 | } |
| 325 | else { |
Damien Lespiau | e7cca1a | 2013-01-27 02:06:22 +0000 | [diff] [blame] | 326 | */ |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 327 | insn->bits2.da1.src0_horiz_stride = reg.hstride; |
| 328 | insn->bits2.da1.src0_width = reg.width; |
| 329 | insn->bits2.da1.src0_vert_stride = reg.vstride; |
Damien Lespiau | e7cca1a | 2013-01-27 02:06:22 +0000 | [diff] [blame] | 330 | /* } */ |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 331 | } |
| 332 | else { |
| 333 | insn->bits2.da16.src0_swz_x = BRW_GET_SWZ(reg.dw1.bits.swizzle, BRW_CHANNEL_X); |
| 334 | insn->bits2.da16.src0_swz_y = BRW_GET_SWZ(reg.dw1.bits.swizzle, BRW_CHANNEL_Y); |
| 335 | insn->bits2.da16.src0_swz_z = BRW_GET_SWZ(reg.dw1.bits.swizzle, BRW_CHANNEL_Z); |
| 336 | insn->bits2.da16.src0_swz_w = BRW_GET_SWZ(reg.dw1.bits.swizzle, BRW_CHANNEL_W); |
| 337 | |
| 338 | /* This is an oddity of the fact we're using the same |
| 339 | * descriptions for registers in align_16 as align_1: |
| 340 | */ |
| 341 | if (reg.vstride == BRW_VERTICAL_STRIDE_8) |
| 342 | insn->bits2.da16.src0_vert_stride = BRW_VERTICAL_STRIDE_4; |
| 343 | else |
| 344 | insn->bits2.da16.src0_vert_stride = reg.vstride; |
| 345 | } |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | |
| 350 | void brw_set_src1(struct brw_compile *p, |
| 351 | struct brw_instruction *insn, |
| 352 | struct brw_reg reg) |
| 353 | { |
Damien Lespiau | d3a2a67 | 2013-01-28 15:27:59 +0000 | [diff] [blame] | 354 | struct brw_context *brw = p->brw; |
| 355 | struct intel_context *intel = &brw->intel; |
| 356 | |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 357 | assert(reg.file != BRW_MESSAGE_REGISTER_FILE); |
| 358 | |
Damien Lespiau | 103edcc | 2013-01-25 15:13:30 +0000 | [diff] [blame] | 359 | if (reg.file != BRW_ARCHITECTURE_REGISTER_FILE) |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 360 | assert(reg.nr < 128); |
| 361 | |
| 362 | gen7_convert_mrf_to_grf(p, ®); |
| 363 | |
| 364 | validate_reg(insn, reg); |
| 365 | |
| 366 | insn->bits1.da1.src1_reg_file = reg.file; |
| 367 | insn->bits1.da1.src1_reg_type = reg.type; |
| 368 | insn->bits3.da1.src1_abs = reg.abs; |
| 369 | insn->bits3.da1.src1_negate = reg.negate; |
Damien Lespiau | d3a2a67 | 2013-01-28 15:27:59 +0000 | [diff] [blame] | 370 | insn->bits3.da1.src1_address_mode = reg.address_mode; |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 371 | |
| 372 | /* Only src1 can be immediate in two-argument instructions. |
| 373 | */ |
| 374 | assert(insn->bits1.da1.src0_reg_file != BRW_IMMEDIATE_VALUE); |
| 375 | |
| 376 | if (reg.file == BRW_IMMEDIATE_VALUE) { |
| 377 | insn->bits3.ud = reg.dw1.ud; |
| 378 | } |
| 379 | else { |
Damien Lespiau | d3a2a67 | 2013-01-28 15:27:59 +0000 | [diff] [blame] | 380 | /* It's only BRW that does not support register-indirect addressing on |
| 381 | * src1 */ |
| 382 | assert (intel->gen >= 4 || reg.address_mode == BRW_ADDRESS_DIRECT); |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 383 | |
Damien Lespiau | d3a2a67 | 2013-01-28 15:27:59 +0000 | [diff] [blame] | 384 | if (reg.address_mode == BRW_ADDRESS_DIRECT) { |
| 385 | if (insn->header.access_mode == BRW_ALIGN_1) { |
| 386 | insn->bits3.da1.src1_subreg_nr = reg.subnr; |
| 387 | insn->bits3.da1.src1_reg_nr = reg.nr; |
| 388 | } |
| 389 | else { |
| 390 | insn->bits3.da16.src1_subreg_nr = reg.subnr / 16; |
| 391 | insn->bits3.da16.src1_reg_nr = reg.nr; |
| 392 | } |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 393 | } |
| 394 | else { |
Damien Lespiau | d3a2a67 | 2013-01-28 15:27:59 +0000 | [diff] [blame] | 395 | insn->bits3.ia1.src1_subreg_nr = reg.subnr; |
| 396 | |
| 397 | if (insn->header.access_mode == BRW_ALIGN_1) |
| 398 | insn->bits3.ia1.src1_indirect_offset = reg.dw1.bits.indirect_offset; |
| 399 | else |
| 400 | insn->bits3.ia16.src1_indirect_offset = reg.dw1.bits.indirect_offset / 16; |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 401 | } |
| 402 | |
| 403 | if (insn->header.access_mode == BRW_ALIGN_1) { |
Damien Lespiau | d3a2a67 | 2013-01-28 15:27:59 +0000 | [diff] [blame] | 404 | /* FIXME: While this is correct, if the assembler uses that code path |
| 405 | * the opcode generated are different and thus needs a validation |
| 406 | * pass. |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 407 | if (reg.width == BRW_WIDTH_1 && |
| 408 | insn->header.execution_size == BRW_EXECUTE_1) { |
| 409 | insn->bits3.da1.src1_horiz_stride = BRW_HORIZONTAL_STRIDE_0; |
| 410 | insn->bits3.da1.src1_width = BRW_WIDTH_1; |
| 411 | insn->bits3.da1.src1_vert_stride = BRW_VERTICAL_STRIDE_0; |
| 412 | } |
Damien Lespiau | d3a2a67 | 2013-01-28 15:27:59 +0000 | [diff] [blame] | 413 | else { */ |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 414 | insn->bits3.da1.src1_horiz_stride = reg.hstride; |
| 415 | insn->bits3.da1.src1_width = reg.width; |
| 416 | insn->bits3.da1.src1_vert_stride = reg.vstride; |
Damien Lespiau | d3a2a67 | 2013-01-28 15:27:59 +0000 | [diff] [blame] | 417 | /* } */ |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 418 | } |
| 419 | else { |
| 420 | insn->bits3.da16.src1_swz_x = BRW_GET_SWZ(reg.dw1.bits.swizzle, BRW_CHANNEL_X); |
| 421 | insn->bits3.da16.src1_swz_y = BRW_GET_SWZ(reg.dw1.bits.swizzle, BRW_CHANNEL_Y); |
| 422 | insn->bits3.da16.src1_swz_z = BRW_GET_SWZ(reg.dw1.bits.swizzle, BRW_CHANNEL_Z); |
| 423 | insn->bits3.da16.src1_swz_w = BRW_GET_SWZ(reg.dw1.bits.swizzle, BRW_CHANNEL_W); |
| 424 | |
| 425 | /* This is an oddity of the fact we're using the same |
| 426 | * descriptions for registers in align_16 as align_1: |
| 427 | */ |
| 428 | if (reg.vstride == BRW_VERTICAL_STRIDE_8) |
| 429 | insn->bits3.da16.src1_vert_stride = BRW_VERTICAL_STRIDE_4; |
| 430 | else |
| 431 | insn->bits3.da16.src1_vert_stride = reg.vstride; |
| 432 | } |
| 433 | } |
| 434 | } |
| 435 | |
| 436 | /** |
| 437 | * Set the Message Descriptor and Extended Message Descriptor fields |
| 438 | * for SEND messages. |
| 439 | * |
| 440 | * \note This zeroes out the Function Control bits, so it must be called |
| 441 | * \b before filling out any message-specific data. Callers can |
| 442 | * choose not to fill in irrelevant bits; they will be zero. |
| 443 | */ |
| 444 | static void |
| 445 | brw_set_message_descriptor(struct brw_compile *p, |
| 446 | struct brw_instruction *inst, |
| 447 | enum brw_message_target sfid, |
| 448 | unsigned msg_length, |
| 449 | unsigned response_length, |
| 450 | bool header_present, |
| 451 | bool end_of_thread) |
| 452 | { |
| 453 | struct intel_context *intel = &p->brw->intel; |
| 454 | |
| 455 | brw_set_src1(p, inst, brw_imm_d(0)); |
| 456 | |
| 457 | if (intel->gen >= 5) { |
| 458 | inst->bits3.generic_gen5.header_present = header_present; |
| 459 | inst->bits3.generic_gen5.response_length = response_length; |
| 460 | inst->bits3.generic_gen5.msg_length = msg_length; |
| 461 | inst->bits3.generic_gen5.end_of_thread = end_of_thread; |
| 462 | |
| 463 | if (intel->gen >= 6) { |
| 464 | /* On Gen6+ Message target/SFID goes in bits 27:24 of the header */ |
| 465 | inst->header.destreg__conditionalmod = sfid; |
| 466 | } else { |
| 467 | /* Set Extended Message Descriptor (ex_desc) */ |
| 468 | inst->bits2.send_gen5.sfid = sfid; |
| 469 | inst->bits2.send_gen5.end_of_thread = end_of_thread; |
| 470 | } |
| 471 | } else { |
| 472 | inst->bits3.generic.response_length = response_length; |
| 473 | inst->bits3.generic.msg_length = msg_length; |
| 474 | inst->bits3.generic.msg_target = sfid; |
| 475 | inst->bits3.generic.end_of_thread = end_of_thread; |
| 476 | } |
| 477 | } |
| 478 | |
| 479 | static void brw_set_math_message( struct brw_compile *p, |
| 480 | struct brw_instruction *insn, |
| 481 | GLuint function, |
| 482 | GLuint integer_type, |
| 483 | bool low_precision, |
| 484 | GLuint dataType ) |
| 485 | { |
| 486 | struct brw_context *brw = p->brw; |
| 487 | struct intel_context *intel = &brw->intel; |
| 488 | unsigned msg_length; |
| 489 | unsigned response_length; |
| 490 | |
| 491 | /* Infer message length from the function */ |
| 492 | switch (function) { |
| 493 | case BRW_MATH_FUNCTION_POW: |
| 494 | case BRW_MATH_FUNCTION_INT_DIV_QUOTIENT: |
| 495 | case BRW_MATH_FUNCTION_INT_DIV_REMAINDER: |
| 496 | case BRW_MATH_FUNCTION_INT_DIV_QUOTIENT_AND_REMAINDER: |
| 497 | msg_length = 2; |
| 498 | break; |
| 499 | default: |
| 500 | msg_length = 1; |
| 501 | break; |
| 502 | } |
| 503 | |
| 504 | /* Infer response length from the function */ |
| 505 | switch (function) { |
| 506 | case BRW_MATH_FUNCTION_SINCOS: |
| 507 | case BRW_MATH_FUNCTION_INT_DIV_QUOTIENT_AND_REMAINDER: |
| 508 | response_length = 2; |
| 509 | break; |
| 510 | default: |
| 511 | response_length = 1; |
| 512 | break; |
| 513 | } |
| 514 | |
| 515 | |
| 516 | brw_set_message_descriptor(p, insn, BRW_SFID_MATH, |
| 517 | msg_length, response_length, false, false); |
| 518 | if (intel->gen == 5) { |
| 519 | insn->bits3.math_gen5.function = function; |
| 520 | insn->bits3.math_gen5.int_type = integer_type; |
| 521 | insn->bits3.math_gen5.precision = low_precision; |
| 522 | insn->bits3.math_gen5.saturate = insn->header.saturate; |
| 523 | insn->bits3.math_gen5.data_type = dataType; |
| 524 | insn->bits3.math_gen5.snapshot = 0; |
| 525 | } else { |
| 526 | insn->bits3.math.function = function; |
| 527 | insn->bits3.math.int_type = integer_type; |
| 528 | insn->bits3.math.precision = low_precision; |
| 529 | insn->bits3.math.saturate = insn->header.saturate; |
| 530 | insn->bits3.math.data_type = dataType; |
| 531 | } |
| 532 | insn->header.saturate = 0; |
| 533 | } |
| 534 | |
| 535 | |
| 536 | static void brw_set_ff_sync_message(struct brw_compile *p, |
| 537 | struct brw_instruction *insn, |
| 538 | bool allocate, |
| 539 | GLuint response_length, |
| 540 | bool end_of_thread) |
| 541 | { |
| 542 | brw_set_message_descriptor(p, insn, BRW_SFID_URB, |
| 543 | 1, response_length, true, end_of_thread); |
| 544 | insn->bits3.urb_gen5.opcode = 1; /* FF_SYNC */ |
| 545 | insn->bits3.urb_gen5.offset = 0; /* Not used by FF_SYNC */ |
| 546 | insn->bits3.urb_gen5.swizzle_control = 0; /* Not used by FF_SYNC */ |
| 547 | insn->bits3.urb_gen5.allocate = allocate; |
| 548 | insn->bits3.urb_gen5.used = 0; /* Not used by FF_SYNC */ |
| 549 | insn->bits3.urb_gen5.complete = 0; /* Not used by FF_SYNC */ |
| 550 | } |
| 551 | |
| 552 | static void brw_set_urb_message( struct brw_compile *p, |
| 553 | struct brw_instruction *insn, |
| 554 | bool allocate, |
| 555 | bool used, |
| 556 | GLuint msg_length, |
| 557 | GLuint response_length, |
| 558 | bool end_of_thread, |
| 559 | bool complete, |
| 560 | GLuint offset, |
| 561 | GLuint swizzle_control ) |
| 562 | { |
| 563 | struct brw_context *brw = p->brw; |
| 564 | struct intel_context *intel = &brw->intel; |
| 565 | |
| 566 | brw_set_message_descriptor(p, insn, BRW_SFID_URB, |
| 567 | msg_length, response_length, true, end_of_thread); |
| 568 | if (intel->gen == 7) { |
| 569 | insn->bits3.urb_gen7.opcode = 0; /* URB_WRITE_HWORD */ |
| 570 | insn->bits3.urb_gen7.offset = offset; |
| 571 | assert(swizzle_control != BRW_URB_SWIZZLE_TRANSPOSE); |
| 572 | insn->bits3.urb_gen7.swizzle_control = swizzle_control; |
| 573 | /* per_slot_offset = 0 makes it ignore offsets in message header */ |
| 574 | insn->bits3.urb_gen7.per_slot_offset = 0; |
| 575 | insn->bits3.urb_gen7.complete = complete; |
| 576 | } else if (intel->gen >= 5) { |
| 577 | insn->bits3.urb_gen5.opcode = 0; /* URB_WRITE */ |
| 578 | insn->bits3.urb_gen5.offset = offset; |
| 579 | insn->bits3.urb_gen5.swizzle_control = swizzle_control; |
| 580 | insn->bits3.urb_gen5.allocate = allocate; |
| 581 | insn->bits3.urb_gen5.used = used; /* ? */ |
| 582 | insn->bits3.urb_gen5.complete = complete; |
| 583 | } else { |
| 584 | insn->bits3.urb.opcode = 0; /* ? */ |
| 585 | insn->bits3.urb.offset = offset; |
| 586 | insn->bits3.urb.swizzle_control = swizzle_control; |
| 587 | insn->bits3.urb.allocate = allocate; |
| 588 | insn->bits3.urb.used = used; /* ? */ |
| 589 | insn->bits3.urb.complete = complete; |
| 590 | } |
| 591 | } |
| 592 | |
| 593 | void |
| 594 | brw_set_dp_write_message(struct brw_compile *p, |
| 595 | struct brw_instruction *insn, |
| 596 | GLuint binding_table_index, |
| 597 | GLuint msg_control, |
| 598 | GLuint msg_type, |
| 599 | GLuint msg_length, |
| 600 | bool header_present, |
| 601 | GLuint last_render_target, |
| 602 | GLuint response_length, |
| 603 | GLuint end_of_thread, |
| 604 | GLuint send_commit_msg) |
| 605 | { |
| 606 | struct brw_context *brw = p->brw; |
| 607 | struct intel_context *intel = &brw->intel; |
| 608 | unsigned sfid; |
| 609 | |
| 610 | if (intel->gen >= 7) { |
| 611 | /* Use the Render Cache for RT writes; otherwise use the Data Cache */ |
| 612 | if (msg_type == GEN6_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_WRITE) |
| 613 | sfid = GEN6_SFID_DATAPORT_RENDER_CACHE; |
| 614 | else |
| 615 | sfid = GEN7_SFID_DATAPORT_DATA_CACHE; |
| 616 | } else if (intel->gen == 6) { |
| 617 | /* Use the render cache for all write messages. */ |
| 618 | sfid = GEN6_SFID_DATAPORT_RENDER_CACHE; |
| 619 | } else { |
| 620 | sfid = BRW_SFID_DATAPORT_WRITE; |
| 621 | } |
| 622 | |
| 623 | brw_set_message_descriptor(p, insn, sfid, msg_length, response_length, |
| 624 | header_present, end_of_thread); |
| 625 | |
| 626 | if (intel->gen >= 7) { |
| 627 | insn->bits3.gen7_dp.binding_table_index = binding_table_index; |
| 628 | insn->bits3.gen7_dp.msg_control = msg_control | |
| 629 | last_render_target << 6; |
| 630 | insn->bits3.gen7_dp.msg_type = msg_type; |
| 631 | } else if (intel->gen == 6) { |
| 632 | insn->bits3.gen6_dp.binding_table_index = binding_table_index; |
| 633 | insn->bits3.gen6_dp.msg_control = msg_control | |
| 634 | last_render_target << 5; |
| 635 | insn->bits3.gen6_dp.msg_type = msg_type; |
| 636 | insn->bits3.gen6_dp.send_commit_msg = send_commit_msg; |
| 637 | } else if (intel->gen == 5) { |
| 638 | insn->bits3.dp_write_gen5.binding_table_index = binding_table_index; |
| 639 | insn->bits3.dp_write_gen5.msg_control = msg_control; |
| 640 | insn->bits3.dp_write_gen5.last_render_target = last_render_target; |
| 641 | insn->bits3.dp_write_gen5.msg_type = msg_type; |
| 642 | insn->bits3.dp_write_gen5.send_commit_msg = send_commit_msg; |
| 643 | } else { |
| 644 | insn->bits3.dp_write.binding_table_index = binding_table_index; |
| 645 | insn->bits3.dp_write.msg_control = msg_control; |
| 646 | insn->bits3.dp_write.last_render_target = last_render_target; |
| 647 | insn->bits3.dp_write.msg_type = msg_type; |
| 648 | insn->bits3.dp_write.send_commit_msg = send_commit_msg; |
| 649 | } |
| 650 | } |
| 651 | |
| 652 | void |
| 653 | brw_set_dp_read_message(struct brw_compile *p, |
| 654 | struct brw_instruction *insn, |
| 655 | GLuint binding_table_index, |
| 656 | GLuint msg_control, |
| 657 | GLuint msg_type, |
| 658 | GLuint target_cache, |
| 659 | GLuint msg_length, |
| 660 | bool header_present, |
| 661 | GLuint response_length) |
| 662 | { |
| 663 | struct brw_context *brw = p->brw; |
| 664 | struct intel_context *intel = &brw->intel; |
| 665 | unsigned sfid; |
| 666 | |
| 667 | if (intel->gen >= 7) { |
| 668 | sfid = GEN7_SFID_DATAPORT_DATA_CACHE; |
| 669 | } else if (intel->gen == 6) { |
| 670 | if (target_cache == BRW_DATAPORT_READ_TARGET_RENDER_CACHE) |
| 671 | sfid = GEN6_SFID_DATAPORT_RENDER_CACHE; |
| 672 | else |
| 673 | sfid = GEN6_SFID_DATAPORT_SAMPLER_CACHE; |
| 674 | } else { |
| 675 | sfid = BRW_SFID_DATAPORT_READ; |
| 676 | } |
| 677 | |
| 678 | brw_set_message_descriptor(p, insn, sfid, msg_length, response_length, |
| 679 | header_present, false); |
| 680 | |
| 681 | if (intel->gen >= 7) { |
| 682 | insn->bits3.gen7_dp.binding_table_index = binding_table_index; |
| 683 | insn->bits3.gen7_dp.msg_control = msg_control; |
| 684 | insn->bits3.gen7_dp.msg_type = msg_type; |
| 685 | } else if (intel->gen == 6) { |
| 686 | insn->bits3.gen6_dp.binding_table_index = binding_table_index; |
| 687 | insn->bits3.gen6_dp.msg_control = msg_control; |
| 688 | insn->bits3.gen6_dp.msg_type = msg_type; |
| 689 | insn->bits3.gen6_dp.send_commit_msg = 0; |
| 690 | } else if (intel->gen == 5) { |
| 691 | insn->bits3.dp_read_gen5.binding_table_index = binding_table_index; |
| 692 | insn->bits3.dp_read_gen5.msg_control = msg_control; |
| 693 | insn->bits3.dp_read_gen5.msg_type = msg_type; |
| 694 | insn->bits3.dp_read_gen5.target_cache = target_cache; |
| 695 | } else if (intel->is_g4x) { |
| 696 | insn->bits3.dp_read_g4x.binding_table_index = binding_table_index; /*0:7*/ |
| 697 | insn->bits3.dp_read_g4x.msg_control = msg_control; /*8:10*/ |
| 698 | insn->bits3.dp_read_g4x.msg_type = msg_type; /*11:13*/ |
| 699 | insn->bits3.dp_read_g4x.target_cache = target_cache; /*14:15*/ |
| 700 | } else { |
| 701 | insn->bits3.dp_read.binding_table_index = binding_table_index; /*0:7*/ |
| 702 | insn->bits3.dp_read.msg_control = msg_control; /*8:11*/ |
| 703 | insn->bits3.dp_read.msg_type = msg_type; /*12:13*/ |
| 704 | insn->bits3.dp_read.target_cache = target_cache; /*14:15*/ |
| 705 | } |
| 706 | } |
| 707 | |
| 708 | void |
| 709 | brw_set_sampler_message(struct brw_compile *p, |
| 710 | struct brw_instruction *insn, |
| 711 | GLuint binding_table_index, |
| 712 | GLuint sampler, |
| 713 | GLuint msg_type, |
| 714 | GLuint response_length, |
| 715 | GLuint msg_length, |
| 716 | GLuint header_present, |
| 717 | GLuint simd_mode, |
| 718 | GLuint return_format) |
| 719 | { |
| 720 | struct brw_context *brw = p->brw; |
| 721 | struct intel_context *intel = &brw->intel; |
| 722 | |
| 723 | brw_set_message_descriptor(p, insn, BRW_SFID_SAMPLER, msg_length, |
| 724 | response_length, header_present, false); |
| 725 | |
| 726 | if (intel->gen >= 7) { |
| 727 | insn->bits3.sampler_gen7.binding_table_index = binding_table_index; |
| 728 | insn->bits3.sampler_gen7.sampler = sampler; |
| 729 | insn->bits3.sampler_gen7.msg_type = msg_type; |
| 730 | insn->bits3.sampler_gen7.simd_mode = simd_mode; |
| 731 | } else if (intel->gen >= 5) { |
| 732 | insn->bits3.sampler_gen5.binding_table_index = binding_table_index; |
| 733 | insn->bits3.sampler_gen5.sampler = sampler; |
| 734 | insn->bits3.sampler_gen5.msg_type = msg_type; |
| 735 | insn->bits3.sampler_gen5.simd_mode = simd_mode; |
| 736 | } else if (intel->is_g4x) { |
| 737 | insn->bits3.sampler_g4x.binding_table_index = binding_table_index; |
| 738 | insn->bits3.sampler_g4x.sampler = sampler; |
| 739 | insn->bits3.sampler_g4x.msg_type = msg_type; |
| 740 | } else { |
| 741 | insn->bits3.sampler.binding_table_index = binding_table_index; |
| 742 | insn->bits3.sampler.sampler = sampler; |
| 743 | insn->bits3.sampler.msg_type = msg_type; |
| 744 | insn->bits3.sampler.return_format = return_format; |
| 745 | } |
| 746 | } |
| 747 | |
| 748 | |
| 749 | #define next_insn brw_next_insn |
| 750 | struct brw_instruction * |
| 751 | brw_next_insn(struct brw_compile *p, GLuint opcode) |
| 752 | { |
| 753 | struct brw_instruction *insn; |
| 754 | |
| 755 | if (p->nr_insn + 1 > p->store_size) { |
| 756 | if (0) |
| 757 | printf("incresing the store size to %d\n", p->store_size << 1); |
| 758 | p->store_size <<= 1; |
| 759 | p->store = reralloc(p->mem_ctx, p->store, |
| 760 | struct brw_instruction, p->store_size); |
| 761 | if (!p->store) |
| 762 | assert(!"realloc eu store memeory failed"); |
| 763 | } |
| 764 | |
| 765 | p->next_insn_offset += 16; |
| 766 | insn = &p->store[p->nr_insn++]; |
| 767 | memcpy(insn, p->current, sizeof(*insn)); |
| 768 | |
| 769 | /* Reset this one-shot flag: |
| 770 | */ |
| 771 | |
| 772 | if (p->current->header.destreg__conditionalmod) { |
| 773 | p->current->header.destreg__conditionalmod = 0; |
| 774 | p->current->header.predicate_control = BRW_PREDICATE_NORMAL; |
| 775 | } |
| 776 | |
| 777 | insn->header.opcode = opcode; |
| 778 | return insn; |
| 779 | } |
| 780 | |
| 781 | static struct brw_instruction *brw_alu1( struct brw_compile *p, |
| 782 | GLuint opcode, |
| 783 | struct brw_reg dest, |
| 784 | struct brw_reg src ) |
| 785 | { |
| 786 | struct brw_instruction *insn = next_insn(p, opcode); |
| 787 | brw_set_dest(p, insn, dest); |
| 788 | brw_set_src0(p, insn, src); |
| 789 | return insn; |
| 790 | } |
| 791 | |
| 792 | static struct brw_instruction *brw_alu2(struct brw_compile *p, |
| 793 | GLuint opcode, |
| 794 | struct brw_reg dest, |
| 795 | struct brw_reg src0, |
| 796 | struct brw_reg src1 ) |
| 797 | { |
| 798 | struct brw_instruction *insn = next_insn(p, opcode); |
| 799 | brw_set_dest(p, insn, dest); |
| 800 | brw_set_src0(p, insn, src0); |
| 801 | brw_set_src1(p, insn, src1); |
| 802 | return insn; |
| 803 | } |
| 804 | |
| 805 | static int |
| 806 | get_3src_subreg_nr(struct brw_reg reg) |
| 807 | { |
| 808 | if (reg.vstride == BRW_VERTICAL_STRIDE_0) { |
| 809 | assert(brw_is_single_value_swizzle(reg.dw1.bits.swizzle)); |
| 810 | return reg.subnr / 4 + BRW_GET_SWZ(reg.dw1.bits.swizzle, 0); |
| 811 | } else { |
| 812 | return reg.subnr / 4; |
| 813 | } |
| 814 | } |
| 815 | |
Damien Lespiau | 67f3f94 | 2013-01-31 01:27:36 +0000 | [diff] [blame^] | 816 | static int get_3src_type(int type) |
| 817 | { |
| 818 | assert(type == BRW_REGISTER_TYPE_F || |
| 819 | type == BRW_REGISTER_TYPE_D || |
| 820 | type == BRW_REGISTER_TYPE_UD); |
| 821 | |
| 822 | switch(type) { |
| 823 | case BRW_REGISTER_TYPE_F: return BRW_REGISTER_3SRC_TYPE_F; |
| 824 | case BRW_REGISTER_TYPE_D: return BRW_REGISTER_3SRC_TYPE_D; |
| 825 | case BRW_REGISTER_TYPE_UD: return BRW_REGISTER_3SRC_TYPE_UD; |
| 826 | } |
| 827 | |
| 828 | return BRW_REGISTER_3SRC_TYPE_F; |
| 829 | } |
| 830 | |
Damien Lespiau | a2a6583 | 2013-01-31 00:53:46 +0000 | [diff] [blame] | 831 | void |
| 832 | brw_set_3src_dest(struct brw_compile *p, |
| 833 | struct brw_instruction *insn, |
| 834 | struct brw_reg dest) |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 835 | { |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 836 | gen7_convert_mrf_to_grf(p, &dest); |
| 837 | |
| 838 | assert(insn->header.access_mode == BRW_ALIGN_16); |
| 839 | |
| 840 | assert(dest.file == BRW_GENERAL_REGISTER_FILE || |
| 841 | dest.file == BRW_MESSAGE_REGISTER_FILE); |
| 842 | assert(dest.nr < 128); |
| 843 | assert(dest.address_mode == BRW_ADDRESS_DIRECT); |
Damien Lespiau | 67f3f94 | 2013-01-31 01:27:36 +0000 | [diff] [blame^] | 844 | insn->bits1.da3src.dest_reg_type = get_3src_type(dest.type); |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 845 | insn->bits1.da3src.dest_reg_file = (dest.file == BRW_MESSAGE_REGISTER_FILE); |
| 846 | insn->bits1.da3src.dest_reg_nr = dest.nr; |
| 847 | insn->bits1.da3src.dest_subreg_nr = dest.subnr / 16; |
| 848 | insn->bits1.da3src.dest_writemask = dest.dw1.bits.writemask; |
| 849 | guess_execution_size(p, insn, dest); |
Damien Lespiau | a2a6583 | 2013-01-31 00:53:46 +0000 | [diff] [blame] | 850 | } |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 851 | |
Damien Lespiau | a2a6583 | 2013-01-31 00:53:46 +0000 | [diff] [blame] | 852 | void |
| 853 | brw_set_3src_src0(struct brw_compile *p, |
| 854 | struct brw_instruction *insn, |
| 855 | struct brw_reg src0) |
| 856 | { |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 857 | assert(src0.file == BRW_GENERAL_REGISTER_FILE); |
| 858 | assert(src0.address_mode == BRW_ADDRESS_DIRECT); |
| 859 | assert(src0.nr < 128); |
Damien Lespiau | 67f3f94 | 2013-01-31 01:27:36 +0000 | [diff] [blame^] | 860 | insn->bits1.da3src.src_reg_type = get_3src_type(src0.type); |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 861 | insn->bits2.da3src.src0_swizzle = src0.dw1.bits.swizzle; |
| 862 | insn->bits2.da3src.src0_subreg_nr = get_3src_subreg_nr(src0); |
| 863 | insn->bits2.da3src.src0_reg_nr = src0.nr; |
| 864 | insn->bits1.da3src.src0_abs = src0.abs; |
| 865 | insn->bits1.da3src.src0_negate = src0.negate; |
| 866 | insn->bits2.da3src.src0_rep_ctrl = src0.vstride == BRW_VERTICAL_STRIDE_0; |
Damien Lespiau | a2a6583 | 2013-01-31 00:53:46 +0000 | [diff] [blame] | 867 | } |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 868 | |
Damien Lespiau | a2a6583 | 2013-01-31 00:53:46 +0000 | [diff] [blame] | 869 | void |
| 870 | brw_set_3src_src1(struct brw_compile *p, |
| 871 | struct brw_instruction *insn, |
| 872 | struct brw_reg src1) |
| 873 | { |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 874 | assert(src1.file == BRW_GENERAL_REGISTER_FILE); |
| 875 | assert(src1.address_mode == BRW_ADDRESS_DIRECT); |
| 876 | assert(src1.nr < 128); |
Damien Lespiau | 67f3f94 | 2013-01-31 01:27:36 +0000 | [diff] [blame^] | 877 | assert(src1.type == insn->bits1.da3src.src_reg_type); |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 878 | insn->bits2.da3src.src1_swizzle = src1.dw1.bits.swizzle; |
| 879 | insn->bits2.da3src.src1_subreg_nr_low = get_3src_subreg_nr(src1) & 0x3; |
| 880 | insn->bits3.da3src.src1_subreg_nr_high = get_3src_subreg_nr(src1) >> 2; |
| 881 | insn->bits2.da3src.src1_rep_ctrl = src1.vstride == BRW_VERTICAL_STRIDE_0; |
| 882 | insn->bits3.da3src.src1_reg_nr = src1.nr; |
| 883 | insn->bits1.da3src.src1_abs = src1.abs; |
| 884 | insn->bits1.da3src.src1_negate = src1.negate; |
Damien Lespiau | a2a6583 | 2013-01-31 00:53:46 +0000 | [diff] [blame] | 885 | } |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 886 | |
Damien Lespiau | a2a6583 | 2013-01-31 00:53:46 +0000 | [diff] [blame] | 887 | void |
| 888 | brw_set_3src_src2(struct brw_compile *p, |
| 889 | struct brw_instruction *insn, |
| 890 | struct brw_reg src2) |
| 891 | { |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 892 | assert(src2.file == BRW_GENERAL_REGISTER_FILE); |
| 893 | assert(src2.address_mode == BRW_ADDRESS_DIRECT); |
| 894 | assert(src2.nr < 128); |
Damien Lespiau | 67f3f94 | 2013-01-31 01:27:36 +0000 | [diff] [blame^] | 895 | assert(src2.type == insn->bits1.da3src.src_reg_type); |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 896 | insn->bits3.da3src.src2_swizzle = src2.dw1.bits.swizzle; |
| 897 | insn->bits3.da3src.src2_subreg_nr = get_3src_subreg_nr(src2); |
| 898 | insn->bits3.da3src.src2_rep_ctrl = src2.vstride == BRW_VERTICAL_STRIDE_0; |
| 899 | insn->bits3.da3src.src2_reg_nr = src2.nr; |
| 900 | insn->bits1.da3src.src2_abs = src2.abs; |
| 901 | insn->bits1.da3src.src2_negate = src2.negate; |
Damien Lespiau | a2a6583 | 2013-01-31 00:53:46 +0000 | [diff] [blame] | 902 | } |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 903 | |
Damien Lespiau | a2a6583 | 2013-01-31 00:53:46 +0000 | [diff] [blame] | 904 | static struct brw_instruction *brw_alu3(struct brw_compile *p, |
| 905 | GLuint opcode, |
| 906 | struct brw_reg dest, |
| 907 | struct brw_reg src0, |
| 908 | struct brw_reg src1, |
| 909 | struct brw_reg src2) |
| 910 | { |
| 911 | struct brw_instruction *insn = next_insn(p, opcode); |
| 912 | brw_set_3src_dest(p, insn, dest); |
| 913 | brw_set_3src_src0(p, insn, src0); |
| 914 | brw_set_3src_src1(p, insn, src1); |
| 915 | brw_set_3src_src2(p, insn, src2); |
Damien Lespiau | 042e935 | 2013-01-19 23:27:46 +0000 | [diff] [blame] | 916 | return insn; |
| 917 | } |
| 918 | |
| 919 | |
| 920 | /*********************************************************************** |
| 921 | * Convenience routines. |
| 922 | */ |
| 923 | #define ALU1(OP) \ |
| 924 | struct brw_instruction *brw_##OP(struct brw_compile *p, \ |
| 925 | struct brw_reg dest, \ |
| 926 | struct brw_reg src0) \ |
| 927 | { \ |
| 928 | return brw_alu1(p, BRW_OPCODE_##OP, dest, src0); \ |
| 929 | } |
| 930 | |
| 931 | #define ALU2(OP) \ |
| 932 | struct brw_instruction *brw_##OP(struct brw_compile *p, \ |
| 933 | struct brw_reg dest, \ |
| 934 | struct brw_reg src0, \ |
| 935 | struct brw_reg src1) \ |
| 936 | { \ |
| 937 | return brw_alu2(p, BRW_OPCODE_##OP, dest, src0, src1); \ |
| 938 | } |
| 939 | |
| 940 | #define ALU3(OP) \ |
| 941 | struct brw_instruction *brw_##OP(struct brw_compile *p, \ |
| 942 | struct brw_reg dest, \ |
| 943 | struct brw_reg src0, \ |
| 944 | struct brw_reg src1, \ |
| 945 | struct brw_reg src2) \ |
| 946 | { \ |
| 947 | return brw_alu3(p, BRW_OPCODE_##OP, dest, src0, src1, src2); \ |
| 948 | } |
| 949 | |
| 950 | /* Rounding operations (other than RNDD) require two instructions - the first |
| 951 | * stores a rounded value (possibly the wrong way) in the dest register, but |
| 952 | * also sets a per-channel "increment bit" in the flag register. A predicated |
| 953 | * add of 1.0 fixes dest to contain the desired result. |
| 954 | * |
| 955 | * Sandybridge and later appear to round correctly without an ADD. |
| 956 | */ |
| 957 | #define ROUND(OP) \ |
| 958 | void brw_##OP(struct brw_compile *p, \ |
| 959 | struct brw_reg dest, \ |
| 960 | struct brw_reg src) \ |
| 961 | { \ |
| 962 | struct brw_instruction *rnd, *add; \ |
| 963 | rnd = next_insn(p, BRW_OPCODE_##OP); \ |
| 964 | brw_set_dest(p, rnd, dest); \ |
| 965 | brw_set_src0(p, rnd, src); \ |
| 966 | \ |
| 967 | if (p->brw->intel.gen < 6) { \ |
| 968 | /* turn on round-increments */ \ |
| 969 | rnd->header.destreg__conditionalmod = BRW_CONDITIONAL_R; \ |
| 970 | add = brw_ADD(p, dest, dest, brw_imm_f(1.0f)); \ |
| 971 | add->header.predicate_control = BRW_PREDICATE_NORMAL; \ |
| 972 | } \ |
| 973 | } |
| 974 | |
| 975 | |
| 976 | ALU1(MOV) |
| 977 | ALU2(SEL) |
| 978 | ALU1(NOT) |
| 979 | ALU2(AND) |
| 980 | ALU2(OR) |
| 981 | ALU2(XOR) |
| 982 | ALU2(SHR) |
| 983 | ALU2(SHL) |
| 984 | ALU2(RSR) |
| 985 | ALU2(RSL) |
| 986 | ALU2(ASR) |
| 987 | ALU1(FRC) |
| 988 | ALU1(RNDD) |
| 989 | ALU2(MAC) |
| 990 | ALU2(MACH) |
| 991 | ALU1(LZD) |
| 992 | ALU2(DP4) |
| 993 | ALU2(DPH) |
| 994 | ALU2(DP3) |
| 995 | ALU2(DP2) |
| 996 | ALU2(LINE) |
| 997 | ALU2(PLN) |
| 998 | ALU3(MAD) |
| 999 | |
| 1000 | ROUND(RNDZ) |
| 1001 | ROUND(RNDE) |
| 1002 | |
| 1003 | |
| 1004 | struct brw_instruction *brw_ADD(struct brw_compile *p, |
| 1005 | struct brw_reg dest, |
| 1006 | struct brw_reg src0, |
| 1007 | struct brw_reg src1) |
| 1008 | { |
| 1009 | /* 6.2.2: add */ |
| 1010 | if (src0.type == BRW_REGISTER_TYPE_F || |
| 1011 | (src0.file == BRW_IMMEDIATE_VALUE && |
| 1012 | src0.type == BRW_REGISTER_TYPE_VF)) { |
| 1013 | assert(src1.type != BRW_REGISTER_TYPE_UD); |
| 1014 | assert(src1.type != BRW_REGISTER_TYPE_D); |
| 1015 | } |
| 1016 | |
| 1017 | if (src1.type == BRW_REGISTER_TYPE_F || |
| 1018 | (src1.file == BRW_IMMEDIATE_VALUE && |
| 1019 | src1.type == BRW_REGISTER_TYPE_VF)) { |
| 1020 | assert(src0.type != BRW_REGISTER_TYPE_UD); |
| 1021 | assert(src0.type != BRW_REGISTER_TYPE_D); |
| 1022 | } |
| 1023 | |
| 1024 | return brw_alu2(p, BRW_OPCODE_ADD, dest, src0, src1); |
| 1025 | } |
| 1026 | |
| 1027 | struct brw_instruction *brw_AVG(struct brw_compile *p, |
| 1028 | struct brw_reg dest, |
| 1029 | struct brw_reg src0, |
| 1030 | struct brw_reg src1) |
| 1031 | { |
| 1032 | assert(dest.type == src0.type); |
| 1033 | assert(src0.type == src1.type); |
| 1034 | switch (src0.type) { |
| 1035 | case BRW_REGISTER_TYPE_B: |
| 1036 | case BRW_REGISTER_TYPE_UB: |
| 1037 | case BRW_REGISTER_TYPE_W: |
| 1038 | case BRW_REGISTER_TYPE_UW: |
| 1039 | case BRW_REGISTER_TYPE_D: |
| 1040 | case BRW_REGISTER_TYPE_UD: |
| 1041 | break; |
| 1042 | default: |
| 1043 | assert(!"Bad type for brw_AVG"); |
| 1044 | } |
| 1045 | |
| 1046 | return brw_alu2(p, BRW_OPCODE_AVG, dest, src0, src1); |
| 1047 | } |
| 1048 | |
| 1049 | struct brw_instruction *brw_MUL(struct brw_compile *p, |
| 1050 | struct brw_reg dest, |
| 1051 | struct brw_reg src0, |
| 1052 | struct brw_reg src1) |
| 1053 | { |
| 1054 | /* 6.32.38: mul */ |
| 1055 | if (src0.type == BRW_REGISTER_TYPE_D || |
| 1056 | src0.type == BRW_REGISTER_TYPE_UD || |
| 1057 | src1.type == BRW_REGISTER_TYPE_D || |
| 1058 | src1.type == BRW_REGISTER_TYPE_UD) { |
| 1059 | assert(dest.type != BRW_REGISTER_TYPE_F); |
| 1060 | } |
| 1061 | |
| 1062 | if (src0.type == BRW_REGISTER_TYPE_F || |
| 1063 | (src0.file == BRW_IMMEDIATE_VALUE && |
| 1064 | src0.type == BRW_REGISTER_TYPE_VF)) { |
| 1065 | assert(src1.type != BRW_REGISTER_TYPE_UD); |
| 1066 | assert(src1.type != BRW_REGISTER_TYPE_D); |
| 1067 | } |
| 1068 | |
| 1069 | if (src1.type == BRW_REGISTER_TYPE_F || |
| 1070 | (src1.file == BRW_IMMEDIATE_VALUE && |
| 1071 | src1.type == BRW_REGISTER_TYPE_VF)) { |
| 1072 | assert(src0.type != BRW_REGISTER_TYPE_UD); |
| 1073 | assert(src0.type != BRW_REGISTER_TYPE_D); |
| 1074 | } |
| 1075 | |
| 1076 | assert(src0.file != BRW_ARCHITECTURE_REGISTER_FILE || |
| 1077 | src0.nr != BRW_ARF_ACCUMULATOR); |
| 1078 | assert(src1.file != BRW_ARCHITECTURE_REGISTER_FILE || |
| 1079 | src1.nr != BRW_ARF_ACCUMULATOR); |
| 1080 | |
| 1081 | return brw_alu2(p, BRW_OPCODE_MUL, dest, src0, src1); |
| 1082 | } |
| 1083 | |
| 1084 | |
| 1085 | void brw_NOP(struct brw_compile *p) |
| 1086 | { |
| 1087 | struct brw_instruction *insn = next_insn(p, BRW_OPCODE_NOP); |
| 1088 | brw_set_dest(p, insn, retype(brw_vec4_grf(0,0), BRW_REGISTER_TYPE_UD)); |
| 1089 | brw_set_src0(p, insn, retype(brw_vec4_grf(0,0), BRW_REGISTER_TYPE_UD)); |
| 1090 | brw_set_src1(p, insn, brw_imm_ud(0x0)); |
| 1091 | } |
| 1092 | |
| 1093 | |
| 1094 | |
| 1095 | |
| 1096 | |
| 1097 | /*********************************************************************** |
| 1098 | * Comparisons, if/else/endif |
| 1099 | */ |
| 1100 | |
| 1101 | struct brw_instruction *brw_JMPI(struct brw_compile *p, |
| 1102 | struct brw_reg dest, |
| 1103 | struct brw_reg src0, |
| 1104 | struct brw_reg src1) |
| 1105 | { |
| 1106 | struct brw_instruction *insn = brw_alu2(p, BRW_OPCODE_JMPI, dest, src0, src1); |
| 1107 | |
| 1108 | insn->header.execution_size = 1; |
| 1109 | insn->header.compression_control = BRW_COMPRESSION_NONE; |
| 1110 | insn->header.mask_control = BRW_MASK_DISABLE; |
| 1111 | |
| 1112 | p->current->header.predicate_control = BRW_PREDICATE_NONE; |
| 1113 | |
| 1114 | return insn; |
| 1115 | } |
| 1116 | |
| 1117 | static void |
| 1118 | push_if_stack(struct brw_compile *p, struct brw_instruction *inst) |
| 1119 | { |
| 1120 | p->if_stack[p->if_stack_depth] = inst - p->store; |
| 1121 | |
| 1122 | p->if_stack_depth++; |
| 1123 | if (p->if_stack_array_size <= p->if_stack_depth) { |
| 1124 | p->if_stack_array_size *= 2; |
| 1125 | p->if_stack = reralloc(p->mem_ctx, p->if_stack, int, |
| 1126 | p->if_stack_array_size); |
| 1127 | } |
| 1128 | } |
| 1129 | |
| 1130 | static struct brw_instruction * |
| 1131 | pop_if_stack(struct brw_compile *p) |
| 1132 | { |
| 1133 | p->if_stack_depth--; |
| 1134 | return &p->store[p->if_stack[p->if_stack_depth]]; |
| 1135 | } |
| 1136 | |
| 1137 | static void |
| 1138 | push_loop_stack(struct brw_compile *p, struct brw_instruction *inst) |
| 1139 | { |
| 1140 | if (p->loop_stack_array_size < p->loop_stack_depth) { |
| 1141 | p->loop_stack_array_size *= 2; |
| 1142 | p->loop_stack = reralloc(p->mem_ctx, p->loop_stack, int, |
| 1143 | p->loop_stack_array_size); |
| 1144 | p->if_depth_in_loop = reralloc(p->mem_ctx, p->if_depth_in_loop, int, |
| 1145 | p->loop_stack_array_size); |
| 1146 | } |
| 1147 | |
| 1148 | p->loop_stack[p->loop_stack_depth] = inst - p->store; |
| 1149 | p->loop_stack_depth++; |
| 1150 | p->if_depth_in_loop[p->loop_stack_depth] = 0; |
| 1151 | } |
| 1152 | |
| 1153 | static struct brw_instruction * |
| 1154 | get_inner_do_insn(struct brw_compile *p) |
| 1155 | { |
| 1156 | return &p->store[p->loop_stack[p->loop_stack_depth - 1]]; |
| 1157 | } |
| 1158 | |
| 1159 | /* EU takes the value from the flag register and pushes it onto some |
| 1160 | * sort of a stack (presumably merging with any flag value already on |
| 1161 | * the stack). Within an if block, the flags at the top of the stack |
| 1162 | * control execution on each channel of the unit, eg. on each of the |
| 1163 | * 16 pixel values in our wm programs. |
| 1164 | * |
| 1165 | * When the matching 'else' instruction is reached (presumably by |
| 1166 | * countdown of the instruction count patched in by our ELSE/ENDIF |
| 1167 | * functions), the relevent flags are inverted. |
| 1168 | * |
| 1169 | * When the matching 'endif' instruction is reached, the flags are |
| 1170 | * popped off. If the stack is now empty, normal execution resumes. |
| 1171 | */ |
| 1172 | struct brw_instruction * |
| 1173 | brw_IF(struct brw_compile *p, GLuint execute_size) |
| 1174 | { |
| 1175 | struct intel_context *intel = &p->brw->intel; |
| 1176 | struct brw_instruction *insn; |
| 1177 | |
| 1178 | insn = next_insn(p, BRW_OPCODE_IF); |
| 1179 | |
| 1180 | /* Override the defaults for this instruction: |
| 1181 | */ |
| 1182 | if (intel->gen < 6) { |
| 1183 | brw_set_dest(p, insn, brw_ip_reg()); |
| 1184 | brw_set_src0(p, insn, brw_ip_reg()); |
| 1185 | brw_set_src1(p, insn, brw_imm_d(0x0)); |
| 1186 | } else if (intel->gen == 6) { |
| 1187 | brw_set_dest(p, insn, brw_imm_w(0)); |
| 1188 | insn->bits1.branch_gen6.jump_count = 0; |
| 1189 | brw_set_src0(p, insn, vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_D))); |
| 1190 | brw_set_src1(p, insn, vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_D))); |
| 1191 | } else { |
| 1192 | brw_set_dest(p, insn, vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_D))); |
| 1193 | brw_set_src0(p, insn, vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_D))); |
| 1194 | brw_set_src1(p, insn, brw_imm_ud(0)); |
| 1195 | insn->bits3.break_cont.jip = 0; |
| 1196 | insn->bits3.break_cont.uip = 0; |
| 1197 | } |
| 1198 | |
| 1199 | insn->header.execution_size = execute_size; |
| 1200 | insn->header.compression_control = BRW_COMPRESSION_NONE; |
| 1201 | insn->header.predicate_control = BRW_PREDICATE_NORMAL; |
| 1202 | insn->header.mask_control = BRW_MASK_ENABLE; |
| 1203 | if (!p->single_program_flow) |
| 1204 | insn->header.thread_control = BRW_THREAD_SWITCH; |
| 1205 | |
| 1206 | p->current->header.predicate_control = BRW_PREDICATE_NONE; |
| 1207 | |
| 1208 | push_if_stack(p, insn); |
| 1209 | p->if_depth_in_loop[p->loop_stack_depth]++; |
| 1210 | return insn; |
| 1211 | } |
| 1212 | |
| 1213 | /* This function is only used for gen6-style IF instructions with an |
| 1214 | * embedded comparison (conditional modifier). It is not used on gen7. |
| 1215 | */ |
| 1216 | struct brw_instruction * |
| 1217 | gen6_IF(struct brw_compile *p, uint32_t conditional, |
| 1218 | struct brw_reg src0, struct brw_reg src1) |
| 1219 | { |
| 1220 | struct brw_instruction *insn; |
| 1221 | |
| 1222 | insn = next_insn(p, BRW_OPCODE_IF); |
| 1223 | |
| 1224 | brw_set_dest(p, insn, brw_imm_w(0)); |
| 1225 | if (p->compressed) { |
| 1226 | insn->header.execution_size = BRW_EXECUTE_16; |
| 1227 | } else { |
| 1228 | insn->header.execution_size = BRW_EXECUTE_8; |
| 1229 | } |
| 1230 | insn->bits1.branch_gen6.jump_count = 0; |
| 1231 | brw_set_src0(p, insn, src0); |
| 1232 | brw_set_src1(p, insn, src1); |
| 1233 | |
| 1234 | assert(insn->header.compression_control == BRW_COMPRESSION_NONE); |
| 1235 | assert(insn->header.predicate_control == BRW_PREDICATE_NONE); |
| 1236 | insn->header.destreg__conditionalmod = conditional; |
| 1237 | |
| 1238 | if (!p->single_program_flow) |
| 1239 | insn->header.thread_control = BRW_THREAD_SWITCH; |
| 1240 | |
| 1241 | push_if_stack(p, insn); |
| 1242 | return insn; |
| 1243 | } |
| 1244 | |
| 1245 | /** |
| 1246 | * In single-program-flow (SPF) mode, convert IF and ELSE into ADDs. |
| 1247 | */ |
| 1248 | static void |
| 1249 | convert_IF_ELSE_to_ADD(struct brw_compile *p, |
| 1250 | struct brw_instruction *if_inst, |
| 1251 | struct brw_instruction *else_inst) |
| 1252 | { |
| 1253 | /* The next instruction (where the ENDIF would be, if it existed) */ |
| 1254 | struct brw_instruction *next_inst = &p->store[p->nr_insn]; |
| 1255 | |
| 1256 | assert(p->single_program_flow); |
| 1257 | assert(if_inst != NULL && if_inst->header.opcode == BRW_OPCODE_IF); |
| 1258 | assert(else_inst == NULL || else_inst->header.opcode == BRW_OPCODE_ELSE); |
| 1259 | assert(if_inst->header.execution_size == BRW_EXECUTE_1); |
| 1260 | |
| 1261 | /* Convert IF to an ADD instruction that moves the instruction pointer |
| 1262 | * to the first instruction of the ELSE block. If there is no ELSE |
| 1263 | * block, point to where ENDIF would be. Reverse the predicate. |
| 1264 | * |
| 1265 | * There's no need to execute an ENDIF since we don't need to do any |
| 1266 | * stack operations, and if we're currently executing, we just want to |
| 1267 | * continue normally. |
| 1268 | */ |
| 1269 | if_inst->header.opcode = BRW_OPCODE_ADD; |
| 1270 | if_inst->header.predicate_inverse = 1; |
| 1271 | |
| 1272 | if (else_inst != NULL) { |
| 1273 | /* Convert ELSE to an ADD instruction that points where the ENDIF |
| 1274 | * would be. |
| 1275 | */ |
| 1276 | else_inst->header.opcode = BRW_OPCODE_ADD; |
| 1277 | |
| 1278 | if_inst->bits3.ud = (else_inst - if_inst + 1) * 16; |
| 1279 | else_inst->bits3.ud = (next_inst - else_inst) * 16; |
| 1280 | } else { |
| 1281 | if_inst->bits3.ud = (next_inst - if_inst) * 16; |
| 1282 | } |
| 1283 | } |
| 1284 | |
| 1285 | /** |
| 1286 | * Patch IF and ELSE instructions with appropriate jump targets. |
| 1287 | */ |
| 1288 | static void |
| 1289 | patch_IF_ELSE(struct brw_compile *p, |
| 1290 | struct brw_instruction *if_inst, |
| 1291 | struct brw_instruction *else_inst, |
| 1292 | struct brw_instruction *endif_inst) |
| 1293 | { |
| 1294 | struct intel_context *intel = &p->brw->intel; |
| 1295 | |
| 1296 | /* We shouldn't be patching IF and ELSE instructions in single program flow |
| 1297 | * mode when gen < 6, because in single program flow mode on those |
| 1298 | * platforms, we convert flow control instructions to conditional ADDs that |
| 1299 | * operate on IP (see brw_ENDIF). |
| 1300 | * |
| 1301 | * However, on Gen6, writing to IP doesn't work in single program flow mode |
| 1302 | * (see the SandyBridge PRM, Volume 4 part 2, p79: "When SPF is ON, IP may |
| 1303 | * not be updated by non-flow control instructions."). And on later |
| 1304 | * platforms, there is no significant benefit to converting control flow |
| 1305 | * instructions to conditional ADDs. So we do patch IF and ELSE |
| 1306 | * instructions in single program flow mode on those platforms. |
| 1307 | */ |
| 1308 | if (intel->gen < 6) |
| 1309 | assert(!p->single_program_flow); |
| 1310 | |
| 1311 | assert(if_inst != NULL && if_inst->header.opcode == BRW_OPCODE_IF); |
| 1312 | assert(endif_inst != NULL); |
| 1313 | assert(else_inst == NULL || else_inst->header.opcode == BRW_OPCODE_ELSE); |
| 1314 | |
| 1315 | unsigned br = 1; |
| 1316 | /* Jump count is for 64bit data chunk each, so one 128bit instruction |
| 1317 | * requires 2 chunks. |
| 1318 | */ |
| 1319 | if (intel->gen >= 5) |
| 1320 | br = 2; |
| 1321 | |
| 1322 | assert(endif_inst->header.opcode == BRW_OPCODE_ENDIF); |
| 1323 | endif_inst->header.execution_size = if_inst->header.execution_size; |
| 1324 | |
| 1325 | if (else_inst == NULL) { |
| 1326 | /* Patch IF -> ENDIF */ |
| 1327 | if (intel->gen < 6) { |
| 1328 | /* Turn it into an IFF, which means no mask stack operations for |
| 1329 | * all-false and jumping past the ENDIF. |
| 1330 | */ |
| 1331 | if_inst->header.opcode = BRW_OPCODE_IFF; |
| 1332 | if_inst->bits3.if_else.jump_count = br * (endif_inst - if_inst + 1); |
| 1333 | if_inst->bits3.if_else.pop_count = 0; |
| 1334 | if_inst->bits3.if_else.pad0 = 0; |
| 1335 | } else if (intel->gen == 6) { |
| 1336 | /* As of gen6, there is no IFF and IF must point to the ENDIF. */ |
| 1337 | if_inst->bits1.branch_gen6.jump_count = br * (endif_inst - if_inst); |
| 1338 | } else { |
| 1339 | if_inst->bits3.break_cont.uip = br * (endif_inst - if_inst); |
| 1340 | if_inst->bits3.break_cont.jip = br * (endif_inst - if_inst); |
| 1341 | } |
| 1342 | } else { |
| 1343 | else_inst->header.execution_size = if_inst->header.execution_size; |
| 1344 | |
| 1345 | /* Patch IF -> ELSE */ |
| 1346 | if (intel->gen < 6) { |
| 1347 | if_inst->bits3.if_else.jump_count = br * (else_inst - if_inst); |
| 1348 | if_inst->bits3.if_else.pop_count = 0; |
| 1349 | if_inst->bits3.if_else.pad0 = 0; |
| 1350 | } else if (intel->gen == 6) { |
| 1351 | if_inst->bits1.branch_gen6.jump_count = br * (else_inst - if_inst + 1); |
| 1352 | } |
| 1353 | |
| 1354 | /* Patch ELSE -> ENDIF */ |
| 1355 | if (intel->gen < 6) { |
| 1356 | /* BRW_OPCODE_ELSE pre-gen6 should point just past the |
| 1357 | * matching ENDIF. |
| 1358 | */ |
| 1359 | else_inst->bits3.if_else.jump_count = br*(endif_inst - else_inst + 1); |
| 1360 | else_inst->bits3.if_else.pop_count = 1; |
| 1361 | else_inst->bits3.if_else.pad0 = 0; |
| 1362 | } else if (intel->gen == 6) { |
| 1363 | /* BRW_OPCODE_ELSE on gen6 should point to the matching ENDIF. */ |
| 1364 | else_inst->bits1.branch_gen6.jump_count = br*(endif_inst - else_inst); |
| 1365 | } else { |
| 1366 | /* The IF instruction's JIP should point just past the ELSE */ |
| 1367 | if_inst->bits3.break_cont.jip = br * (else_inst - if_inst + 1); |
| 1368 | /* The IF instruction's UIP and ELSE's JIP should point to ENDIF */ |
| 1369 | if_inst->bits3.break_cont.uip = br * (endif_inst - if_inst); |
| 1370 | else_inst->bits3.break_cont.jip = br * (endif_inst - else_inst); |
| 1371 | } |
| 1372 | } |
| 1373 | } |
| 1374 | |
| 1375 | void |
| 1376 | brw_ELSE(struct brw_compile *p) |
| 1377 | { |
| 1378 | struct intel_context *intel = &p->brw->intel; |
| 1379 | struct brw_instruction *insn; |
| 1380 | |
| 1381 | insn = next_insn(p, BRW_OPCODE_ELSE); |
| 1382 | |
| 1383 | if (intel->gen < 6) { |
| 1384 | brw_set_dest(p, insn, brw_ip_reg()); |
| 1385 | brw_set_src0(p, insn, brw_ip_reg()); |
| 1386 | brw_set_src1(p, insn, brw_imm_d(0x0)); |
| 1387 | } else if (intel->gen == 6) { |
| 1388 | brw_set_dest(p, insn, brw_imm_w(0)); |
| 1389 | insn->bits1.branch_gen6.jump_count = 0; |
| 1390 | brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1391 | brw_set_src1(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1392 | } else { |
| 1393 | brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1394 | brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1395 | brw_set_src1(p, insn, brw_imm_ud(0)); |
| 1396 | insn->bits3.break_cont.jip = 0; |
| 1397 | insn->bits3.break_cont.uip = 0; |
| 1398 | } |
| 1399 | |
| 1400 | insn->header.compression_control = BRW_COMPRESSION_NONE; |
| 1401 | insn->header.mask_control = BRW_MASK_ENABLE; |
| 1402 | if (!p->single_program_flow) |
| 1403 | insn->header.thread_control = BRW_THREAD_SWITCH; |
| 1404 | |
| 1405 | push_if_stack(p, insn); |
| 1406 | } |
| 1407 | |
| 1408 | void |
| 1409 | brw_ENDIF(struct brw_compile *p) |
| 1410 | { |
| 1411 | struct intel_context *intel = &p->brw->intel; |
| 1412 | struct brw_instruction *insn = NULL; |
| 1413 | struct brw_instruction *else_inst = NULL; |
| 1414 | struct brw_instruction *if_inst = NULL; |
| 1415 | struct brw_instruction *tmp; |
| 1416 | bool emit_endif = true; |
| 1417 | |
| 1418 | /* In single program flow mode, we can express IF and ELSE instructions |
| 1419 | * equivalently as ADD instructions that operate on IP. On platforms prior |
| 1420 | * to Gen6, flow control instructions cause an implied thread switch, so |
| 1421 | * this is a significant savings. |
| 1422 | * |
| 1423 | * However, on Gen6, writing to IP doesn't work in single program flow mode |
| 1424 | * (see the SandyBridge PRM, Volume 4 part 2, p79: "When SPF is ON, IP may |
| 1425 | * not be updated by non-flow control instructions."). And on later |
| 1426 | * platforms, there is no significant benefit to converting control flow |
| 1427 | * instructions to conditional ADDs. So we only do this trick on Gen4 and |
| 1428 | * Gen5. |
| 1429 | */ |
| 1430 | if (intel->gen < 6 && p->single_program_flow) |
| 1431 | emit_endif = false; |
| 1432 | |
| 1433 | /* |
| 1434 | * A single next_insn() may change the base adress of instruction store |
| 1435 | * memory(p->store), so call it first before referencing the instruction |
| 1436 | * store pointer from an index |
| 1437 | */ |
| 1438 | if (emit_endif) |
| 1439 | insn = next_insn(p, BRW_OPCODE_ENDIF); |
| 1440 | |
| 1441 | /* Pop the IF and (optional) ELSE instructions from the stack */ |
| 1442 | p->if_depth_in_loop[p->loop_stack_depth]--; |
| 1443 | tmp = pop_if_stack(p); |
| 1444 | if (tmp->header.opcode == BRW_OPCODE_ELSE) { |
| 1445 | else_inst = tmp; |
| 1446 | tmp = pop_if_stack(p); |
| 1447 | } |
| 1448 | if_inst = tmp; |
| 1449 | |
| 1450 | if (!emit_endif) { |
| 1451 | /* ENDIF is useless; don't bother emitting it. */ |
| 1452 | convert_IF_ELSE_to_ADD(p, if_inst, else_inst); |
| 1453 | return; |
| 1454 | } |
| 1455 | |
| 1456 | if (intel->gen < 6) { |
| 1457 | brw_set_dest(p, insn, retype(brw_vec4_grf(0,0), BRW_REGISTER_TYPE_UD)); |
| 1458 | brw_set_src0(p, insn, retype(brw_vec4_grf(0,0), BRW_REGISTER_TYPE_UD)); |
| 1459 | brw_set_src1(p, insn, brw_imm_d(0x0)); |
| 1460 | } else if (intel->gen == 6) { |
| 1461 | brw_set_dest(p, insn, brw_imm_w(0)); |
| 1462 | brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1463 | brw_set_src1(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1464 | } else { |
| 1465 | brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1466 | brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1467 | brw_set_src1(p, insn, brw_imm_ud(0)); |
| 1468 | } |
| 1469 | |
| 1470 | insn->header.compression_control = BRW_COMPRESSION_NONE; |
| 1471 | insn->header.mask_control = BRW_MASK_ENABLE; |
| 1472 | insn->header.thread_control = BRW_THREAD_SWITCH; |
| 1473 | |
| 1474 | /* Also pop item off the stack in the endif instruction: */ |
| 1475 | if (intel->gen < 6) { |
| 1476 | insn->bits3.if_else.jump_count = 0; |
| 1477 | insn->bits3.if_else.pop_count = 1; |
| 1478 | insn->bits3.if_else.pad0 = 0; |
| 1479 | } else if (intel->gen == 6) { |
| 1480 | insn->bits1.branch_gen6.jump_count = 2; |
| 1481 | } else { |
| 1482 | insn->bits3.break_cont.jip = 2; |
| 1483 | } |
| 1484 | patch_IF_ELSE(p, if_inst, else_inst, insn); |
| 1485 | } |
| 1486 | |
| 1487 | struct brw_instruction *brw_BREAK(struct brw_compile *p) |
| 1488 | { |
| 1489 | struct intel_context *intel = &p->brw->intel; |
| 1490 | struct brw_instruction *insn; |
| 1491 | |
| 1492 | insn = next_insn(p, BRW_OPCODE_BREAK); |
| 1493 | if (intel->gen >= 6) { |
| 1494 | brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1495 | brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1496 | brw_set_src1(p, insn, brw_imm_d(0x0)); |
| 1497 | } else { |
| 1498 | brw_set_dest(p, insn, brw_ip_reg()); |
| 1499 | brw_set_src0(p, insn, brw_ip_reg()); |
| 1500 | brw_set_src1(p, insn, brw_imm_d(0x0)); |
| 1501 | insn->bits3.if_else.pad0 = 0; |
| 1502 | insn->bits3.if_else.pop_count = p->if_depth_in_loop[p->loop_stack_depth]; |
| 1503 | } |
| 1504 | insn->header.compression_control = BRW_COMPRESSION_NONE; |
| 1505 | insn->header.execution_size = BRW_EXECUTE_8; |
| 1506 | |
| 1507 | return insn; |
| 1508 | } |
| 1509 | |
| 1510 | struct brw_instruction *gen6_CONT(struct brw_compile *p) |
| 1511 | { |
| 1512 | struct brw_instruction *insn; |
| 1513 | |
| 1514 | insn = next_insn(p, BRW_OPCODE_CONTINUE); |
| 1515 | brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1516 | brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1517 | brw_set_dest(p, insn, brw_ip_reg()); |
| 1518 | brw_set_src0(p, insn, brw_ip_reg()); |
| 1519 | brw_set_src1(p, insn, brw_imm_d(0x0)); |
| 1520 | |
| 1521 | insn->header.compression_control = BRW_COMPRESSION_NONE; |
| 1522 | insn->header.execution_size = BRW_EXECUTE_8; |
| 1523 | return insn; |
| 1524 | } |
| 1525 | |
| 1526 | struct brw_instruction *brw_CONT(struct brw_compile *p) |
| 1527 | { |
| 1528 | struct brw_instruction *insn; |
| 1529 | insn = next_insn(p, BRW_OPCODE_CONTINUE); |
| 1530 | brw_set_dest(p, insn, brw_ip_reg()); |
| 1531 | brw_set_src0(p, insn, brw_ip_reg()); |
| 1532 | brw_set_src1(p, insn, brw_imm_d(0x0)); |
| 1533 | insn->header.compression_control = BRW_COMPRESSION_NONE; |
| 1534 | insn->header.execution_size = BRW_EXECUTE_8; |
| 1535 | /* insn->header.mask_control = BRW_MASK_DISABLE; */ |
| 1536 | insn->bits3.if_else.pad0 = 0; |
| 1537 | insn->bits3.if_else.pop_count = p->if_depth_in_loop[p->loop_stack_depth]; |
| 1538 | return insn; |
| 1539 | } |
| 1540 | |
| 1541 | struct brw_instruction *gen6_HALT(struct brw_compile *p) |
| 1542 | { |
| 1543 | struct brw_instruction *insn; |
| 1544 | |
| 1545 | insn = next_insn(p, BRW_OPCODE_HALT); |
| 1546 | brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1547 | brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1548 | brw_set_src1(p, insn, brw_imm_d(0x0)); /* UIP and JIP, updated later. */ |
| 1549 | |
| 1550 | if (p->compressed) { |
| 1551 | insn->header.execution_size = BRW_EXECUTE_16; |
| 1552 | } else { |
| 1553 | insn->header.compression_control = BRW_COMPRESSION_NONE; |
| 1554 | insn->header.execution_size = BRW_EXECUTE_8; |
| 1555 | } |
| 1556 | return insn; |
| 1557 | } |
| 1558 | |
| 1559 | /* DO/WHILE loop: |
| 1560 | * |
| 1561 | * The DO/WHILE is just an unterminated loop -- break or continue are |
| 1562 | * used for control within the loop. We have a few ways they can be |
| 1563 | * done. |
| 1564 | * |
| 1565 | * For uniform control flow, the WHILE is just a jump, so ADD ip, ip, |
| 1566 | * jip and no DO instruction. |
| 1567 | * |
| 1568 | * For non-uniform control flow pre-gen6, there's a DO instruction to |
| 1569 | * push the mask, and a WHILE to jump back, and BREAK to get out and |
| 1570 | * pop the mask. |
| 1571 | * |
| 1572 | * For gen6, there's no more mask stack, so no need for DO. WHILE |
| 1573 | * just points back to the first instruction of the loop. |
| 1574 | */ |
| 1575 | struct brw_instruction *brw_DO(struct brw_compile *p, GLuint execute_size) |
| 1576 | { |
| 1577 | struct intel_context *intel = &p->brw->intel; |
| 1578 | |
| 1579 | if (intel->gen >= 6 || p->single_program_flow) { |
| 1580 | push_loop_stack(p, &p->store[p->nr_insn]); |
| 1581 | return &p->store[p->nr_insn]; |
| 1582 | } else { |
| 1583 | struct brw_instruction *insn = next_insn(p, BRW_OPCODE_DO); |
| 1584 | |
| 1585 | push_loop_stack(p, insn); |
| 1586 | |
| 1587 | /* Override the defaults for this instruction: |
| 1588 | */ |
| 1589 | brw_set_dest(p, insn, brw_null_reg()); |
| 1590 | brw_set_src0(p, insn, brw_null_reg()); |
| 1591 | brw_set_src1(p, insn, brw_null_reg()); |
| 1592 | |
| 1593 | insn->header.compression_control = BRW_COMPRESSION_NONE; |
| 1594 | insn->header.execution_size = execute_size; |
| 1595 | insn->header.predicate_control = BRW_PREDICATE_NONE; |
| 1596 | /* insn->header.mask_control = BRW_MASK_ENABLE; */ |
| 1597 | /* insn->header.mask_control = BRW_MASK_DISABLE; */ |
| 1598 | |
| 1599 | return insn; |
| 1600 | } |
| 1601 | } |
| 1602 | |
| 1603 | /** |
| 1604 | * For pre-gen6, we patch BREAK/CONT instructions to point at the WHILE |
| 1605 | * instruction here. |
| 1606 | * |
| 1607 | * For gen6+, see brw_set_uip_jip(), which doesn't care so much about the loop |
| 1608 | * nesting, since it can always just point to the end of the block/current loop. |
| 1609 | */ |
| 1610 | static void |
| 1611 | brw_patch_break_cont(struct brw_compile *p, struct brw_instruction *while_inst) |
| 1612 | { |
| 1613 | struct intel_context *intel = &p->brw->intel; |
| 1614 | struct brw_instruction *do_inst = get_inner_do_insn(p); |
| 1615 | struct brw_instruction *inst; |
| 1616 | int br = (intel->gen == 5) ? 2 : 1; |
| 1617 | |
| 1618 | for (inst = while_inst - 1; inst != do_inst; inst--) { |
| 1619 | /* If the jump count is != 0, that means that this instruction has already |
| 1620 | * been patched because it's part of a loop inside of the one we're |
| 1621 | * patching. |
| 1622 | */ |
| 1623 | if (inst->header.opcode == BRW_OPCODE_BREAK && |
| 1624 | inst->bits3.if_else.jump_count == 0) { |
| 1625 | inst->bits3.if_else.jump_count = br * ((while_inst - inst) + 1); |
| 1626 | } else if (inst->header.opcode == BRW_OPCODE_CONTINUE && |
| 1627 | inst->bits3.if_else.jump_count == 0) { |
| 1628 | inst->bits3.if_else.jump_count = br * (while_inst - inst); |
| 1629 | } |
| 1630 | } |
| 1631 | } |
| 1632 | |
| 1633 | struct brw_instruction *brw_WHILE(struct brw_compile *p) |
| 1634 | { |
| 1635 | struct intel_context *intel = &p->brw->intel; |
| 1636 | struct brw_instruction *insn, *do_insn; |
| 1637 | GLuint br = 1; |
| 1638 | |
| 1639 | if (intel->gen >= 5) |
| 1640 | br = 2; |
| 1641 | |
| 1642 | if (intel->gen >= 7) { |
| 1643 | insn = next_insn(p, BRW_OPCODE_WHILE); |
| 1644 | do_insn = get_inner_do_insn(p); |
| 1645 | |
| 1646 | brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1647 | brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1648 | brw_set_src1(p, insn, brw_imm_ud(0)); |
| 1649 | insn->bits3.break_cont.jip = br * (do_insn - insn); |
| 1650 | |
| 1651 | insn->header.execution_size = BRW_EXECUTE_8; |
| 1652 | } else if (intel->gen == 6) { |
| 1653 | insn = next_insn(p, BRW_OPCODE_WHILE); |
| 1654 | do_insn = get_inner_do_insn(p); |
| 1655 | |
| 1656 | brw_set_dest(p, insn, brw_imm_w(0)); |
| 1657 | insn->bits1.branch_gen6.jump_count = br * (do_insn - insn); |
| 1658 | brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1659 | brw_set_src1(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| 1660 | |
| 1661 | insn->header.execution_size = BRW_EXECUTE_8; |
| 1662 | } else { |
| 1663 | if (p->single_program_flow) { |
| 1664 | insn = next_insn(p, BRW_OPCODE_ADD); |
| 1665 | do_insn = get_inner_do_insn(p); |
| 1666 | |
| 1667 | brw_set_dest(p, insn, brw_ip_reg()); |
| 1668 | brw_set_src0(p, insn, brw_ip_reg()); |
| 1669 | brw_set_src1(p, insn, brw_imm_d((do_insn - insn) * 16)); |
| 1670 | insn->header.execution_size = BRW_EXECUTE_1; |
| 1671 | } else { |
| 1672 | insn = next_insn(p, BRW_OPCODE_WHILE); |
| 1673 | do_insn = get_inner_do_insn(p); |
| 1674 | |
| 1675 | assert(do_insn->header.opcode == BRW_OPCODE_DO); |
| 1676 | |
| 1677 | brw_set_dest(p, insn, brw_ip_reg()); |
| 1678 | brw_set_src0(p, insn, brw_ip_reg()); |
| 1679 | brw_set_src1(p, insn, brw_imm_d(0)); |
| 1680 | |
| 1681 | insn->header.execution_size = do_insn->header.execution_size; |
| 1682 | insn->bits3.if_else.jump_count = br * (do_insn - insn + 1); |
| 1683 | insn->bits3.if_else.pop_count = 0; |
| 1684 | insn->bits3.if_else.pad0 = 0; |
| 1685 | |
| 1686 | brw_patch_break_cont(p, insn); |
| 1687 | } |
| 1688 | } |
| 1689 | insn->header.compression_control = BRW_COMPRESSION_NONE; |
| 1690 | p->current->header.predicate_control = BRW_PREDICATE_NONE; |
| 1691 | |
| 1692 | p->loop_stack_depth--; |
| 1693 | |
| 1694 | return insn; |
| 1695 | } |
| 1696 | |
| 1697 | |
| 1698 | /* FORWARD JUMPS: |
| 1699 | */ |
| 1700 | void brw_land_fwd_jump(struct brw_compile *p, int jmp_insn_idx) |
| 1701 | { |
| 1702 | struct intel_context *intel = &p->brw->intel; |
| 1703 | struct brw_instruction *jmp_insn = &p->store[jmp_insn_idx]; |
| 1704 | GLuint jmpi = 1; |
| 1705 | |
| 1706 | if (intel->gen >= 5) |
| 1707 | jmpi = 2; |
| 1708 | |
| 1709 | assert(jmp_insn->header.opcode == BRW_OPCODE_JMPI); |
| 1710 | assert(jmp_insn->bits1.da1.src1_reg_file == BRW_IMMEDIATE_VALUE); |
| 1711 | |
| 1712 | jmp_insn->bits3.ud = jmpi * (p->nr_insn - jmp_insn_idx - 1); |
| 1713 | } |
| 1714 | |
| 1715 | |
| 1716 | |
| 1717 | /* To integrate with the above, it makes sense that the comparison |
| 1718 | * instruction should populate the flag register. It might be simpler |
| 1719 | * just to use the flag reg for most WM tasks? |
| 1720 | */ |
| 1721 | void brw_CMP(struct brw_compile *p, |
| 1722 | struct brw_reg dest, |
| 1723 | GLuint conditional, |
| 1724 | struct brw_reg src0, |
| 1725 | struct brw_reg src1) |
| 1726 | { |
| 1727 | struct brw_instruction *insn = next_insn(p, BRW_OPCODE_CMP); |
| 1728 | |
| 1729 | insn->header.destreg__conditionalmod = conditional; |
| 1730 | brw_set_dest(p, insn, dest); |
| 1731 | brw_set_src0(p, insn, src0); |
| 1732 | brw_set_src1(p, insn, src1); |
| 1733 | |
| 1734 | /* guess_execution_size(insn, src0); */ |
| 1735 | |
| 1736 | |
| 1737 | /* Make it so that future instructions will use the computed flag |
| 1738 | * value until brw_set_predicate_control_flag_value() is called |
| 1739 | * again. |
| 1740 | */ |
| 1741 | if (dest.file == BRW_ARCHITECTURE_REGISTER_FILE && |
| 1742 | dest.nr == 0) { |
| 1743 | p->current->header.predicate_control = BRW_PREDICATE_NORMAL; |
| 1744 | p->flag_value = 0xff; |
| 1745 | } |
| 1746 | } |
| 1747 | |
| 1748 | /* Issue 'wait' instruction for n1, host could program MMIO |
| 1749 | to wake up thread. */ |
| 1750 | void brw_WAIT (struct brw_compile *p) |
| 1751 | { |
| 1752 | struct brw_instruction *insn = next_insn(p, BRW_OPCODE_WAIT); |
| 1753 | struct brw_reg src = brw_notification_1_reg(); |
| 1754 | |
| 1755 | brw_set_dest(p, insn, src); |
| 1756 | brw_set_src0(p, insn, src); |
| 1757 | brw_set_src1(p, insn, brw_null_reg()); |
| 1758 | insn->header.execution_size = 0; /* must */ |
| 1759 | insn->header.predicate_control = 0; |
| 1760 | insn->header.compression_control = 0; |
| 1761 | } |
| 1762 | |
| 1763 | |
| 1764 | /*********************************************************************** |
| 1765 | * Helpers for the various SEND message types: |
| 1766 | */ |
| 1767 | |
| 1768 | /** Extended math function, float[8]. |
| 1769 | */ |
| 1770 | void brw_math( struct brw_compile *p, |
| 1771 | struct brw_reg dest, |
| 1772 | GLuint function, |
| 1773 | GLuint msg_reg_nr, |
| 1774 | struct brw_reg src, |
| 1775 | GLuint data_type, |
| 1776 | GLuint precision ) |
| 1777 | { |
| 1778 | struct intel_context *intel = &p->brw->intel; |
| 1779 | |
| 1780 | if (intel->gen >= 6) { |
| 1781 | struct brw_instruction *insn = next_insn(p, BRW_OPCODE_MATH); |
| 1782 | |
| 1783 | assert(dest.file == BRW_GENERAL_REGISTER_FILE); |
| 1784 | assert(src.file == BRW_GENERAL_REGISTER_FILE); |
| 1785 | |
| 1786 | assert(dest.hstride == BRW_HORIZONTAL_STRIDE_1); |
| 1787 | if (intel->gen == 6) |
| 1788 | assert(src.hstride == BRW_HORIZONTAL_STRIDE_1); |
| 1789 | |
| 1790 | /* Source modifiers are ignored for extended math instructions on Gen6. */ |
| 1791 | if (intel->gen == 6) { |
| 1792 | assert(!src.negate); |
| 1793 | assert(!src.abs); |
| 1794 | } |
| 1795 | |
| 1796 | if (function == BRW_MATH_FUNCTION_INT_DIV_QUOTIENT || |
| 1797 | function == BRW_MATH_FUNCTION_INT_DIV_REMAINDER || |
| 1798 | function == BRW_MATH_FUNCTION_INT_DIV_QUOTIENT_AND_REMAINDER) { |
| 1799 | assert(src.type != BRW_REGISTER_TYPE_F); |
| 1800 | } else { |
| 1801 | assert(src.type == BRW_REGISTER_TYPE_F); |
| 1802 | } |
| 1803 | |
| 1804 | /* Math is the same ISA format as other opcodes, except that CondModifier |
| 1805 | * becomes FC[3:0] and ThreadCtrl becomes FC[5:4]. |
| 1806 | */ |
| 1807 | insn->header.destreg__conditionalmod = function; |
| 1808 | |
| 1809 | brw_set_dest(p, insn, dest); |
| 1810 | brw_set_src0(p, insn, src); |
| 1811 | brw_set_src1(p, insn, brw_null_reg()); |
| 1812 | } else { |
| 1813 | struct brw_instruction *insn = next_insn(p, BRW_OPCODE_SEND); |
| 1814 | |
| 1815 | /* Example code doesn't set predicate_control for send |
| 1816 | * instructions. |
| 1817 | */ |
| 1818 | insn->header.predicate_control = 0; |
| 1819 | insn->header.destreg__conditionalmod = msg_reg_nr; |
| 1820 | |
| 1821 | brw_set_dest(p, insn, dest); |
| 1822 | brw_set_src0(p, insn, src); |
| 1823 | brw_set_math_message(p, |
| 1824 | insn, |
| 1825 | function, |
| 1826 | src.type == BRW_REGISTER_TYPE_D, |
| 1827 | precision, |
| 1828 | data_type); |
| 1829 | } |
| 1830 | } |
| 1831 | |
| 1832 | /** Extended math function, float[8]. |
| 1833 | */ |
| 1834 | void brw_math2(struct brw_compile *p, |
| 1835 | struct brw_reg dest, |
| 1836 | GLuint function, |
| 1837 | struct brw_reg src0, |
| 1838 | struct brw_reg src1) |
| 1839 | { |
| 1840 | struct intel_context *intel = &p->brw->intel; |
| 1841 | struct brw_instruction *insn = next_insn(p, BRW_OPCODE_MATH); |
| 1842 | |
| 1843 | assert(intel->gen >= 6); |
| 1844 | (void) intel; |
| 1845 | |
| 1846 | |
| 1847 | assert(dest.file == BRW_GENERAL_REGISTER_FILE); |
| 1848 | assert(src0.file == BRW_GENERAL_REGISTER_FILE); |
| 1849 | assert(src1.file == BRW_GENERAL_REGISTER_FILE); |
| 1850 | |
| 1851 | assert(dest.hstride == BRW_HORIZONTAL_STRIDE_1); |
| 1852 | if (intel->gen == 6) { |
| 1853 | assert(src0.hstride == BRW_HORIZONTAL_STRIDE_1); |
| 1854 | assert(src1.hstride == BRW_HORIZONTAL_STRIDE_1); |
| 1855 | } |
| 1856 | |
| 1857 | if (function == BRW_MATH_FUNCTION_INT_DIV_QUOTIENT || |
| 1858 | function == BRW_MATH_FUNCTION_INT_DIV_REMAINDER || |
| 1859 | function == BRW_MATH_FUNCTION_INT_DIV_QUOTIENT_AND_REMAINDER) { |
| 1860 | assert(src0.type != BRW_REGISTER_TYPE_F); |
| 1861 | assert(src1.type != BRW_REGISTER_TYPE_F); |
| 1862 | } else { |
| 1863 | assert(src0.type == BRW_REGISTER_TYPE_F); |
| 1864 | assert(src1.type == BRW_REGISTER_TYPE_F); |
| 1865 | } |
| 1866 | |
| 1867 | /* Source modifiers are ignored for extended math instructions on Gen6. */ |
| 1868 | if (intel->gen == 6) { |
| 1869 | assert(!src0.negate); |
| 1870 | assert(!src0.abs); |
| 1871 | assert(!src1.negate); |
| 1872 | assert(!src1.abs); |
| 1873 | } |
| 1874 | |
| 1875 | /* Math is the same ISA format as other opcodes, except that CondModifier |
| 1876 | * becomes FC[3:0] and ThreadCtrl becomes FC[5:4]. |
| 1877 | */ |
| 1878 | insn->header.destreg__conditionalmod = function; |
| 1879 | |
| 1880 | brw_set_dest(p, insn, dest); |
| 1881 | brw_set_src0(p, insn, src0); |
| 1882 | brw_set_src1(p, insn, src1); |
| 1883 | } |
| 1884 | |
| 1885 | |
| 1886 | /** |
| 1887 | * Write a block of OWORDs (half a GRF each) from the scratch buffer, |
| 1888 | * using a constant offset per channel. |
| 1889 | * |
| 1890 | * The offset must be aligned to oword size (16 bytes). Used for |
| 1891 | * register spilling. |
| 1892 | */ |
| 1893 | void brw_oword_block_write_scratch(struct brw_compile *p, |
| 1894 | struct brw_reg mrf, |
| 1895 | int num_regs, |
| 1896 | GLuint offset) |
| 1897 | { |
| 1898 | struct intel_context *intel = &p->brw->intel; |
| 1899 | uint32_t msg_control, msg_type; |
| 1900 | int mlen; |
| 1901 | |
| 1902 | if (intel->gen >= 6) |
| 1903 | offset /= 16; |
| 1904 | |
| 1905 | mrf = retype(mrf, BRW_REGISTER_TYPE_UD); |
| 1906 | |
| 1907 | if (num_regs == 1) { |
| 1908 | msg_control = BRW_DATAPORT_OWORD_BLOCK_2_OWORDS; |
| 1909 | mlen = 2; |
| 1910 | } else { |
| 1911 | msg_control = BRW_DATAPORT_OWORD_BLOCK_4_OWORDS; |
| 1912 | mlen = 3; |
| 1913 | } |
| 1914 | |
| 1915 | /* Set up the message header. This is g0, with g0.2 filled with |
| 1916 | * the offset. We don't want to leave our offset around in g0 or |
| 1917 | * it'll screw up texture samples, so set it up inside the message |
| 1918 | * reg. |
| 1919 | */ |
| 1920 | { |
| 1921 | brw_push_insn_state(p); |
| 1922 | brw_set_mask_control(p, BRW_MASK_DISABLE); |
| 1923 | brw_set_compression_control(p, BRW_COMPRESSION_NONE); |
| 1924 | |
| 1925 | brw_MOV(p, mrf, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)); |
| 1926 | |
| 1927 | /* set message header global offset field (reg 0, element 2) */ |
| 1928 | brw_MOV(p, |
| 1929 | retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE, |
| 1930 | mrf.nr, |
| 1931 | 2), BRW_REGISTER_TYPE_UD), |
| 1932 | brw_imm_ud(offset)); |
| 1933 | |
| 1934 | brw_pop_insn_state(p); |
| 1935 | } |
| 1936 | |
| 1937 | { |
| 1938 | struct brw_reg dest; |
| 1939 | struct brw_instruction *insn = next_insn(p, BRW_OPCODE_SEND); |
| 1940 | int send_commit_msg; |
| 1941 | struct brw_reg src_header = retype(brw_vec8_grf(0, 0), |
| 1942 | BRW_REGISTER_TYPE_UW); |
| 1943 | |
| 1944 | if (insn->header.compression_control != BRW_COMPRESSION_NONE) { |
| 1945 | insn->header.compression_control = BRW_COMPRESSION_NONE; |
| 1946 | src_header = vec16(src_header); |
| 1947 | } |
| 1948 | assert(insn->header.predicate_control == BRW_PREDICATE_NONE); |
| 1949 | insn->header.destreg__conditionalmod = mrf.nr; |
| 1950 | |
| 1951 | /* Until gen6, writes followed by reads from the same location |
| 1952 | * are not guaranteed to be ordered unless write_commit is set. |
| 1953 | * If set, then a no-op write is issued to the destination |
| 1954 | * register to set a dependency, and a read from the destination |
| 1955 | * can be used to ensure the ordering. |
| 1956 | * |
| 1957 | * For gen6, only writes between different threads need ordering |
| 1958 | * protection. Our use of DP writes is all about register |
| 1959 | * spilling within a thread. |
| 1960 | */ |
| 1961 | if (intel->gen >= 6) { |
| 1962 | dest = retype(vec16(brw_null_reg()), BRW_REGISTER_TYPE_UW); |
| 1963 | send_commit_msg = 0; |
| 1964 | } else { |
| 1965 | dest = src_header; |
| 1966 | send_commit_msg = 1; |
| 1967 | } |
| 1968 | |
| 1969 | brw_set_dest(p, insn, dest); |
| 1970 | if (intel->gen >= 6) { |
| 1971 | brw_set_src0(p, insn, mrf); |
| 1972 | } else { |
| 1973 | brw_set_src0(p, insn, brw_null_reg()); |
| 1974 | } |
| 1975 | |
| 1976 | if (intel->gen >= 6) |
| 1977 | msg_type = GEN6_DATAPORT_WRITE_MESSAGE_OWORD_BLOCK_WRITE; |
| 1978 | else |
| 1979 | msg_type = BRW_DATAPORT_WRITE_MESSAGE_OWORD_BLOCK_WRITE; |
| 1980 | |
| 1981 | brw_set_dp_write_message(p, |
| 1982 | insn, |
| 1983 | 255, /* binding table index (255=stateless) */ |
| 1984 | msg_control, |
| 1985 | msg_type, |
| 1986 | mlen, |
| 1987 | true, /* header_present */ |
| 1988 | 0, /* not a render target */ |
| 1989 | send_commit_msg, /* response_length */ |
| 1990 | 0, /* eot */ |
| 1991 | send_commit_msg); |
| 1992 | } |
| 1993 | } |
| 1994 | |
| 1995 | |
| 1996 | /** |
| 1997 | * Read a block of owords (half a GRF each) from the scratch buffer |
| 1998 | * using a constant index per channel. |
| 1999 | * |
| 2000 | * Offset must be aligned to oword size (16 bytes). Used for register |
| 2001 | * spilling. |
| 2002 | */ |
| 2003 | void |
| 2004 | brw_oword_block_read_scratch(struct brw_compile *p, |
| 2005 | struct brw_reg dest, |
| 2006 | struct brw_reg mrf, |
| 2007 | int num_regs, |
| 2008 | GLuint offset) |
| 2009 | { |
| 2010 | struct intel_context *intel = &p->brw->intel; |
| 2011 | uint32_t msg_control; |
| 2012 | int rlen; |
| 2013 | |
| 2014 | if (intel->gen >= 6) |
| 2015 | offset /= 16; |
| 2016 | |
| 2017 | mrf = retype(mrf, BRW_REGISTER_TYPE_UD); |
| 2018 | dest = retype(dest, BRW_REGISTER_TYPE_UW); |
| 2019 | |
| 2020 | if (num_regs == 1) { |
| 2021 | msg_control = BRW_DATAPORT_OWORD_BLOCK_2_OWORDS; |
| 2022 | rlen = 1; |
| 2023 | } else { |
| 2024 | msg_control = BRW_DATAPORT_OWORD_BLOCK_4_OWORDS; |
| 2025 | rlen = 2; |
| 2026 | } |
| 2027 | |
| 2028 | { |
| 2029 | brw_push_insn_state(p); |
| 2030 | brw_set_compression_control(p, BRW_COMPRESSION_NONE); |
| 2031 | brw_set_mask_control(p, BRW_MASK_DISABLE); |
| 2032 | |
| 2033 | brw_MOV(p, mrf, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)); |
| 2034 | |
| 2035 | /* set message header global offset field (reg 0, element 2) */ |
| 2036 | brw_MOV(p, |
| 2037 | retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE, |
| 2038 | mrf.nr, |
| 2039 | 2), BRW_REGISTER_TYPE_UD), |
| 2040 | brw_imm_ud(offset)); |
| 2041 | |
| 2042 | brw_pop_insn_state(p); |
| 2043 | } |
| 2044 | |
| 2045 | { |
| 2046 | struct brw_instruction *insn = next_insn(p, BRW_OPCODE_SEND); |
| 2047 | |
| 2048 | assert(insn->header.predicate_control == 0); |
| 2049 | insn->header.compression_control = BRW_COMPRESSION_NONE; |
| 2050 | insn->header.destreg__conditionalmod = mrf.nr; |
| 2051 | |
| 2052 | brw_set_dest(p, insn, dest); /* UW? */ |
| 2053 | if (intel->gen >= 6) { |
| 2054 | brw_set_src0(p, insn, mrf); |
| 2055 | } else { |
| 2056 | brw_set_src0(p, insn, brw_null_reg()); |
| 2057 | } |
| 2058 | |
| 2059 | brw_set_dp_read_message(p, |
| 2060 | insn, |
| 2061 | 255, /* binding table index (255=stateless) */ |
| 2062 | msg_control, |
| 2063 | BRW_DATAPORT_READ_MESSAGE_OWORD_BLOCK_READ, /* msg_type */ |
| 2064 | BRW_DATAPORT_READ_TARGET_RENDER_CACHE, |
| 2065 | 1, /* msg_length */ |
| 2066 | true, /* header_present */ |
| 2067 | rlen); |
| 2068 | } |
| 2069 | } |
| 2070 | |
| 2071 | /** |
| 2072 | * Read a float[4] vector from the data port Data Cache (const buffer). |
| 2073 | * Location (in buffer) should be a multiple of 16. |
| 2074 | * Used for fetching shader constants. |
| 2075 | */ |
| 2076 | void brw_oword_block_read(struct brw_compile *p, |
| 2077 | struct brw_reg dest, |
| 2078 | struct brw_reg mrf, |
| 2079 | uint32_t offset, |
| 2080 | uint32_t bind_table_index) |
| 2081 | { |
| 2082 | struct intel_context *intel = &p->brw->intel; |
| 2083 | |
| 2084 | /* On newer hardware, offset is in units of owords. */ |
| 2085 | if (intel->gen >= 6) |
| 2086 | offset /= 16; |
| 2087 | |
| 2088 | mrf = retype(mrf, BRW_REGISTER_TYPE_UD); |
| 2089 | |
| 2090 | brw_push_insn_state(p); |
| 2091 | brw_set_predicate_control(p, BRW_PREDICATE_NONE); |
| 2092 | brw_set_compression_control(p, BRW_COMPRESSION_NONE); |
| 2093 | brw_set_mask_control(p, BRW_MASK_DISABLE); |
| 2094 | |
| 2095 | brw_MOV(p, mrf, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)); |
| 2096 | |
| 2097 | /* set message header global offset field (reg 0, element 2) */ |
| 2098 | brw_MOV(p, |
| 2099 | retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE, |
| 2100 | mrf.nr, |
| 2101 | 2), BRW_REGISTER_TYPE_UD), |
| 2102 | brw_imm_ud(offset)); |
| 2103 | |
| 2104 | struct brw_instruction *insn = next_insn(p, BRW_OPCODE_SEND); |
| 2105 | insn->header.destreg__conditionalmod = mrf.nr; |
| 2106 | |
| 2107 | /* cast dest to a uword[8] vector */ |
| 2108 | dest = retype(vec8(dest), BRW_REGISTER_TYPE_UW); |
| 2109 | |
| 2110 | brw_set_dest(p, insn, dest); |
| 2111 | if (intel->gen >= 6) { |
| 2112 | brw_set_src0(p, insn, mrf); |
| 2113 | } else { |
| 2114 | brw_set_src0(p, insn, brw_null_reg()); |
| 2115 | } |
| 2116 | |
| 2117 | brw_set_dp_read_message(p, |
| 2118 | insn, |
| 2119 | bind_table_index, |
| 2120 | BRW_DATAPORT_OWORD_BLOCK_1_OWORDLOW, |
| 2121 | BRW_DATAPORT_READ_MESSAGE_OWORD_BLOCK_READ, |
| 2122 | BRW_DATAPORT_READ_TARGET_DATA_CACHE, |
| 2123 | 1, /* msg_length */ |
| 2124 | true, /* header_present */ |
| 2125 | 1); /* response_length (1 reg, 2 owords!) */ |
| 2126 | |
| 2127 | brw_pop_insn_state(p); |
| 2128 | } |
| 2129 | |
| 2130 | |
| 2131 | void brw_fb_WRITE(struct brw_compile *p, |
| 2132 | int dispatch_width, |
| 2133 | GLuint msg_reg_nr, |
| 2134 | struct brw_reg src0, |
| 2135 | GLuint msg_control, |
| 2136 | GLuint binding_table_index, |
| 2137 | GLuint msg_length, |
| 2138 | GLuint response_length, |
| 2139 | bool eot, |
| 2140 | bool header_present) |
| 2141 | { |
| 2142 | struct intel_context *intel = &p->brw->intel; |
| 2143 | struct brw_instruction *insn; |
| 2144 | GLuint msg_type; |
| 2145 | struct brw_reg dest; |
| 2146 | |
| 2147 | if (dispatch_width == 16) |
| 2148 | dest = retype(vec16(brw_null_reg()), BRW_REGISTER_TYPE_UW); |
| 2149 | else |
| 2150 | dest = retype(vec8(brw_null_reg()), BRW_REGISTER_TYPE_UW); |
| 2151 | |
| 2152 | if (intel->gen >= 6) { |
| 2153 | insn = next_insn(p, BRW_OPCODE_SENDC); |
| 2154 | } else { |
| 2155 | insn = next_insn(p, BRW_OPCODE_SEND); |
| 2156 | } |
| 2157 | /* The execution mask is ignored for render target writes. */ |
| 2158 | insn->header.predicate_control = 0; |
| 2159 | insn->header.compression_control = BRW_COMPRESSION_NONE; |
| 2160 | |
| 2161 | if (intel->gen >= 6) { |
| 2162 | /* headerless version, just submit color payload */ |
| 2163 | src0 = brw_message_reg(msg_reg_nr); |
| 2164 | |
| 2165 | msg_type = GEN6_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_WRITE; |
| 2166 | } else { |
| 2167 | insn->header.destreg__conditionalmod = msg_reg_nr; |
| 2168 | |
| 2169 | msg_type = BRW_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_WRITE; |
| 2170 | } |
| 2171 | |
| 2172 | brw_set_dest(p, insn, dest); |
| 2173 | brw_set_src0(p, insn, src0); |
| 2174 | brw_set_dp_write_message(p, |
| 2175 | insn, |
| 2176 | binding_table_index, |
| 2177 | msg_control, |
| 2178 | msg_type, |
| 2179 | msg_length, |
| 2180 | header_present, |
| 2181 | eot, /* last render target write */ |
| 2182 | response_length, |
| 2183 | eot, |
| 2184 | 0 /* send_commit_msg */); |
| 2185 | } |
| 2186 | |
| 2187 | |
| 2188 | /** |
| 2189 | * Texture sample instruction. |
| 2190 | * Note: the msg_type plus msg_length values determine exactly what kind |
| 2191 | * of sampling operation is performed. See volume 4, page 161 of docs. |
| 2192 | */ |
| 2193 | void brw_SAMPLE(struct brw_compile *p, |
| 2194 | struct brw_reg dest, |
| 2195 | GLuint msg_reg_nr, |
| 2196 | struct brw_reg src0, |
| 2197 | GLuint binding_table_index, |
| 2198 | GLuint sampler, |
| 2199 | GLuint writemask, |
| 2200 | GLuint msg_type, |
| 2201 | GLuint response_length, |
| 2202 | GLuint msg_length, |
| 2203 | GLuint header_present, |
| 2204 | GLuint simd_mode, |
| 2205 | GLuint return_format) |
| 2206 | { |
| 2207 | struct intel_context *intel = &p->brw->intel; |
| 2208 | bool need_stall = 0; |
| 2209 | |
| 2210 | if (writemask == 0) { |
| 2211 | /*printf("%s: zero writemask??\n", __FUNCTION__); */ |
| 2212 | return; |
| 2213 | } |
| 2214 | |
| 2215 | /* Hardware doesn't do destination dependency checking on send |
| 2216 | * instructions properly. Add a workaround which generates the |
| 2217 | * dependency by other means. In practice it seems like this bug |
| 2218 | * only crops up for texture samples, and only where registers are |
| 2219 | * written by the send and then written again later without being |
| 2220 | * read in between. Luckily for us, we already track that |
| 2221 | * information and use it to modify the writemask for the |
| 2222 | * instruction, so that is a guide for whether a workaround is |
| 2223 | * needed. |
| 2224 | */ |
| 2225 | if (writemask != BRW_WRITEMASK_XYZW) { |
| 2226 | GLuint dst_offset = 0; |
| 2227 | GLuint i, newmask = 0, len = 0; |
| 2228 | |
| 2229 | for (i = 0; i < 4; i++) { |
| 2230 | if (writemask & (1<<i)) |
| 2231 | break; |
| 2232 | dst_offset += 2; |
| 2233 | } |
| 2234 | for (; i < 4; i++) { |
| 2235 | if (!(writemask & (1<<i))) |
| 2236 | break; |
| 2237 | newmask |= 1<<i; |
| 2238 | len++; |
| 2239 | } |
| 2240 | |
| 2241 | if (newmask != writemask) { |
| 2242 | need_stall = 1; |
| 2243 | /* printf("need stall %x %x\n", newmask , writemask); */ |
| 2244 | } |
| 2245 | else { |
| 2246 | bool dispatch_16 = false; |
| 2247 | |
| 2248 | struct brw_reg m1 = brw_message_reg(msg_reg_nr); |
| 2249 | |
| 2250 | guess_execution_size(p, p->current, dest); |
| 2251 | if (p->current->header.execution_size == BRW_EXECUTE_16) |
| 2252 | dispatch_16 = true; |
| 2253 | |
| 2254 | newmask = ~newmask & BRW_WRITEMASK_XYZW; |
| 2255 | |
| 2256 | brw_push_insn_state(p); |
| 2257 | |
| 2258 | brw_set_compression_control(p, BRW_COMPRESSION_NONE); |
| 2259 | brw_set_mask_control(p, BRW_MASK_DISABLE); |
| 2260 | |
| 2261 | brw_MOV(p, retype(m1, BRW_REGISTER_TYPE_UD), |
| 2262 | retype(brw_vec8_grf(0,0), BRW_REGISTER_TYPE_UD)); |
| 2263 | brw_MOV(p, get_element_ud(m1, 2), brw_imm_ud(newmask << 12)); |
| 2264 | |
| 2265 | brw_pop_insn_state(p); |
| 2266 | |
| 2267 | src0 = retype(brw_null_reg(), BRW_REGISTER_TYPE_UW); |
| 2268 | dest = offset(dest, dst_offset); |
| 2269 | |
| 2270 | /* For 16-wide dispatch, masked channels are skipped in the |
| 2271 | * response. For 8-wide, masked channels still take up slots, |
| 2272 | * and are just not written to. |
| 2273 | */ |
| 2274 | if (dispatch_16) |
| 2275 | response_length = len * 2; |
| 2276 | } |
| 2277 | } |
| 2278 | |
| 2279 | { |
| 2280 | struct brw_instruction *insn; |
| 2281 | |
| 2282 | gen6_resolve_implied_move(p, &src0, msg_reg_nr); |
| 2283 | |
| 2284 | insn = next_insn(p, BRW_OPCODE_SEND); |
| 2285 | insn->header.predicate_control = 0; /* XXX */ |
| 2286 | insn->header.compression_control = BRW_COMPRESSION_NONE; |
| 2287 | if (intel->gen < 6) |
| 2288 | insn->header.destreg__conditionalmod = msg_reg_nr; |
| 2289 | |
| 2290 | brw_set_dest(p, insn, dest); |
| 2291 | brw_set_src0(p, insn, src0); |
| 2292 | brw_set_sampler_message(p, insn, |
| 2293 | binding_table_index, |
| 2294 | sampler, |
| 2295 | msg_type, |
| 2296 | response_length, |
| 2297 | msg_length, |
| 2298 | header_present, |
| 2299 | simd_mode, |
| 2300 | return_format); |
| 2301 | } |
| 2302 | |
| 2303 | if (need_stall) { |
| 2304 | struct brw_reg reg = vec8(offset(dest, response_length-1)); |
| 2305 | |
| 2306 | /* mov (8) r9.0<1>:f r9.0<8;8,1>:f { Align1 } |
| 2307 | */ |
| 2308 | brw_push_insn_state(p); |
| 2309 | brw_set_compression_control(p, BRW_COMPRESSION_NONE); |
| 2310 | brw_MOV(p, retype(reg, BRW_REGISTER_TYPE_UD), |
| 2311 | retype(reg, BRW_REGISTER_TYPE_UD)); |
| 2312 | brw_pop_insn_state(p); |
| 2313 | } |
| 2314 | |
| 2315 | } |
| 2316 | |
| 2317 | /* All these variables are pretty confusing - we might be better off |
| 2318 | * using bitmasks and macros for this, in the old style. Or perhaps |
| 2319 | * just having the caller instantiate the fields in dword3 itself. |
| 2320 | */ |
| 2321 | void brw_urb_WRITE(struct brw_compile *p, |
| 2322 | struct brw_reg dest, |
| 2323 | GLuint msg_reg_nr, |
| 2324 | struct brw_reg src0, |
| 2325 | bool allocate, |
| 2326 | bool used, |
| 2327 | GLuint msg_length, |
| 2328 | GLuint response_length, |
| 2329 | bool eot, |
| 2330 | bool writes_complete, |
| 2331 | GLuint offset, |
| 2332 | GLuint swizzle) |
| 2333 | { |
| 2334 | struct intel_context *intel = &p->brw->intel; |
| 2335 | struct brw_instruction *insn; |
| 2336 | |
| 2337 | gen6_resolve_implied_move(p, &src0, msg_reg_nr); |
| 2338 | |
| 2339 | if (intel->gen == 7) { |
| 2340 | /* Enable Channel Masks in the URB_WRITE_HWORD message header */ |
| 2341 | brw_push_insn_state(p); |
| 2342 | brw_set_access_mode(p, BRW_ALIGN_1); |
| 2343 | brw_OR(p, retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE, msg_reg_nr, 5), |
| 2344 | BRW_REGISTER_TYPE_UD), |
| 2345 | retype(brw_vec1_grf(0, 5), BRW_REGISTER_TYPE_UD), |
| 2346 | brw_imm_ud(0xff00)); |
| 2347 | brw_pop_insn_state(p); |
| 2348 | } |
| 2349 | |
| 2350 | insn = next_insn(p, BRW_OPCODE_SEND); |
| 2351 | |
| 2352 | assert(msg_length < BRW_MAX_MRF); |
| 2353 | |
| 2354 | brw_set_dest(p, insn, dest); |
| 2355 | brw_set_src0(p, insn, src0); |
| 2356 | brw_set_src1(p, insn, brw_imm_d(0)); |
| 2357 | |
| 2358 | if (intel->gen < 6) |
| 2359 | insn->header.destreg__conditionalmod = msg_reg_nr; |
| 2360 | |
| 2361 | brw_set_urb_message(p, |
| 2362 | insn, |
| 2363 | allocate, |
| 2364 | used, |
| 2365 | msg_length, |
| 2366 | response_length, |
| 2367 | eot, |
| 2368 | writes_complete, |
| 2369 | offset, |
| 2370 | swizzle); |
| 2371 | } |
| 2372 | |
| 2373 | static int |
| 2374 | next_ip(struct brw_compile *p, int ip) |
| 2375 | { |
| 2376 | struct brw_instruction *insn = (void *)p->store + ip; |
| 2377 | |
| 2378 | if (insn->header.cmpt_control) |
| 2379 | return ip + 8; |
| 2380 | else |
| 2381 | return ip + 16; |
| 2382 | } |
| 2383 | |
| 2384 | static int |
| 2385 | brw_find_next_block_end(struct brw_compile *p, int start) |
| 2386 | { |
| 2387 | int ip; |
| 2388 | void *store = p->store; |
| 2389 | |
| 2390 | for (ip = next_ip(p, start); ip < p->next_insn_offset; ip = next_ip(p, ip)) { |
| 2391 | struct brw_instruction *insn = store + ip; |
| 2392 | |
| 2393 | switch (insn->header.opcode) { |
| 2394 | case BRW_OPCODE_ENDIF: |
| 2395 | case BRW_OPCODE_ELSE: |
| 2396 | case BRW_OPCODE_WHILE: |
| 2397 | case BRW_OPCODE_HALT: |
| 2398 | return ip; |
| 2399 | } |
| 2400 | } |
| 2401 | |
| 2402 | return 0; |
| 2403 | } |
| 2404 | |
| 2405 | /* There is no DO instruction on gen6, so to find the end of the loop |
| 2406 | * we have to see if the loop is jumping back before our start |
| 2407 | * instruction. |
| 2408 | */ |
| 2409 | static int |
| 2410 | brw_find_loop_end(struct brw_compile *p, int start) |
| 2411 | { |
| 2412 | struct intel_context *intel = &p->brw->intel; |
| 2413 | int ip; |
| 2414 | int scale = 8; |
| 2415 | void *store = p->store; |
| 2416 | |
| 2417 | /* Always start after the instruction (such as a WHILE) we're trying to fix |
| 2418 | * up. |
| 2419 | */ |
| 2420 | for (ip = next_ip(p, start); ip < p->next_insn_offset; ip = next_ip(p, ip)) { |
| 2421 | struct brw_instruction *insn = store + ip; |
| 2422 | |
| 2423 | if (insn->header.opcode == BRW_OPCODE_WHILE) { |
| 2424 | int jip = intel->gen == 6 ? insn->bits1.branch_gen6.jump_count |
| 2425 | : insn->bits3.break_cont.jip; |
| 2426 | if (ip + jip * scale <= start) |
| 2427 | return ip; |
| 2428 | } |
| 2429 | } |
| 2430 | assert(!"not reached"); |
| 2431 | return start; |
| 2432 | } |
| 2433 | |
| 2434 | /* After program generation, go back and update the UIP and JIP of |
| 2435 | * BREAK, CONT, and HALT instructions to their correct locations. |
| 2436 | */ |
| 2437 | void |
| 2438 | brw_set_uip_jip(struct brw_compile *p) |
| 2439 | { |
| 2440 | struct intel_context *intel = &p->brw->intel; |
| 2441 | int ip; |
| 2442 | int scale = 8; |
| 2443 | void *store = p->store; |
| 2444 | |
| 2445 | if (intel->gen < 6) |
| 2446 | return; |
| 2447 | |
| 2448 | for (ip = 0; ip < p->next_insn_offset; ip = next_ip(p, ip)) { |
| 2449 | struct brw_instruction *insn = store + ip; |
| 2450 | |
| 2451 | if (insn->header.cmpt_control) { |
| 2452 | /* Fixups for compacted BREAK/CONTINUE not supported yet. */ |
| 2453 | assert(insn->header.opcode != BRW_OPCODE_BREAK && |
| 2454 | insn->header.opcode != BRW_OPCODE_CONTINUE && |
| 2455 | insn->header.opcode != BRW_OPCODE_HALT); |
| 2456 | continue; |
| 2457 | } |
| 2458 | |
| 2459 | int block_end_ip = brw_find_next_block_end(p, ip); |
| 2460 | switch (insn->header.opcode) { |
| 2461 | case BRW_OPCODE_BREAK: |
| 2462 | assert(block_end_ip != 0); |
| 2463 | insn->bits3.break_cont.jip = (block_end_ip - ip) / scale; |
| 2464 | /* Gen7 UIP points to WHILE; Gen6 points just after it */ |
| 2465 | insn->bits3.break_cont.uip = |
| 2466 | (brw_find_loop_end(p, ip) - ip + |
| 2467 | (intel->gen == 6 ? 16 : 0)) / scale; |
| 2468 | break; |
| 2469 | case BRW_OPCODE_CONTINUE: |
| 2470 | assert(block_end_ip != 0); |
| 2471 | insn->bits3.break_cont.jip = (block_end_ip - ip) / scale; |
| 2472 | insn->bits3.break_cont.uip = |
| 2473 | (brw_find_loop_end(p, ip) - ip) / scale; |
| 2474 | |
| 2475 | assert(insn->bits3.break_cont.uip != 0); |
| 2476 | assert(insn->bits3.break_cont.jip != 0); |
| 2477 | break; |
| 2478 | |
| 2479 | case BRW_OPCODE_ENDIF: |
| 2480 | if (block_end_ip == 0) |
| 2481 | insn->bits3.break_cont.jip = 2; |
| 2482 | else |
| 2483 | insn->bits3.break_cont.jip = (block_end_ip - ip) / scale; |
| 2484 | break; |
| 2485 | |
| 2486 | case BRW_OPCODE_HALT: |
| 2487 | /* From the Sandy Bridge PRM (volume 4, part 2, section 8.3.19): |
| 2488 | * |
| 2489 | * "In case of the halt instruction not inside any conditional |
| 2490 | * code block, the value of <JIP> and <UIP> should be the |
| 2491 | * same. In case of the halt instruction inside conditional code |
| 2492 | * block, the <UIP> should be the end of the program, and the |
| 2493 | * <JIP> should be end of the most inner conditional code block." |
| 2494 | * |
| 2495 | * The uip will have already been set by whoever set up the |
| 2496 | * instruction. |
| 2497 | */ |
| 2498 | if (block_end_ip == 0) { |
| 2499 | insn->bits3.break_cont.jip = insn->bits3.break_cont.uip; |
| 2500 | } else { |
| 2501 | insn->bits3.break_cont.jip = (block_end_ip - ip) / scale; |
| 2502 | } |
| 2503 | assert(insn->bits3.break_cont.uip != 0); |
| 2504 | assert(insn->bits3.break_cont.jip != 0); |
| 2505 | break; |
| 2506 | } |
| 2507 | } |
| 2508 | } |
| 2509 | |
| 2510 | void brw_ff_sync(struct brw_compile *p, |
| 2511 | struct brw_reg dest, |
| 2512 | GLuint msg_reg_nr, |
| 2513 | struct brw_reg src0, |
| 2514 | bool allocate, |
| 2515 | GLuint response_length, |
| 2516 | bool eot) |
| 2517 | { |
| 2518 | struct intel_context *intel = &p->brw->intel; |
| 2519 | struct brw_instruction *insn; |
| 2520 | |
| 2521 | gen6_resolve_implied_move(p, &src0, msg_reg_nr); |
| 2522 | |
| 2523 | insn = next_insn(p, BRW_OPCODE_SEND); |
| 2524 | brw_set_dest(p, insn, dest); |
| 2525 | brw_set_src0(p, insn, src0); |
| 2526 | brw_set_src1(p, insn, brw_imm_d(0)); |
| 2527 | |
| 2528 | if (intel->gen < 6) |
| 2529 | insn->header.destreg__conditionalmod = msg_reg_nr; |
| 2530 | |
| 2531 | brw_set_ff_sync_message(p, |
| 2532 | insn, |
| 2533 | allocate, |
| 2534 | response_length, |
| 2535 | eot); |
| 2536 | } |
| 2537 | |
| 2538 | /** |
| 2539 | * Emit the SEND instruction necessary to generate stream output data on Gen6 |
| 2540 | * (for transform feedback). |
| 2541 | * |
| 2542 | * If send_commit_msg is true, this is the last piece of stream output data |
| 2543 | * from this thread, so send the data as a committed write. According to the |
| 2544 | * Sandy Bridge PRM (volume 2 part 1, section 4.5.1): |
| 2545 | * |
| 2546 | * "Prior to End of Thread with a URB_WRITE, the kernel must ensure all |
| 2547 | * writes are complete by sending the final write as a committed write." |
| 2548 | */ |
| 2549 | void |
| 2550 | brw_svb_write(struct brw_compile *p, |
| 2551 | struct brw_reg dest, |
| 2552 | GLuint msg_reg_nr, |
| 2553 | struct brw_reg src0, |
| 2554 | GLuint binding_table_index, |
| 2555 | bool send_commit_msg) |
| 2556 | { |
| 2557 | struct brw_instruction *insn; |
| 2558 | |
| 2559 | gen6_resolve_implied_move(p, &src0, msg_reg_nr); |
| 2560 | |
| 2561 | insn = next_insn(p, BRW_OPCODE_SEND); |
| 2562 | brw_set_dest(p, insn, dest); |
| 2563 | brw_set_src0(p, insn, src0); |
| 2564 | brw_set_src1(p, insn, brw_imm_d(0)); |
| 2565 | brw_set_dp_write_message(p, insn, |
| 2566 | binding_table_index, |
| 2567 | 0, /* msg_control: ignored */ |
| 2568 | GEN6_DATAPORT_WRITE_MESSAGE_STREAMED_VB_WRITE, |
| 2569 | 1, /* msg_length */ |
| 2570 | true, /* header_present */ |
| 2571 | 0, /* last_render_target: ignored */ |
| 2572 | send_commit_msg, /* response_length */ |
| 2573 | 0, /* end_of_thread */ |
| 2574 | send_commit_msg); /* send_commit_msg */ |
| 2575 | } |
| 2576 | |
| 2577 | /** |
| 2578 | * This instruction is generated as a single-channel align1 instruction by |
| 2579 | * both the VS and FS stages when using INTEL_DEBUG=shader_time. |
| 2580 | * |
| 2581 | * We can't use the typed atomic op in the FS because that has the execution |
| 2582 | * mask ANDed with the pixel mask, but we just want to write the one dword for |
| 2583 | * all the pixels. |
| 2584 | * |
| 2585 | * We don't use the SIMD4x2 atomic ops in the VS because want to just write |
| 2586 | * one u32. So we use the same untyped atomic write message as the pixel |
| 2587 | * shader. |
| 2588 | * |
| 2589 | * The untyped atomic operation requires a BUFFER surface type with RAW |
| 2590 | * format, and is only accessible through the legacy DATA_CACHE dataport |
| 2591 | * messages. |
| 2592 | */ |
| 2593 | void brw_shader_time_add(struct brw_compile *p, |
| 2594 | int base_mrf, |
| 2595 | uint32_t surf_index) |
| 2596 | { |
| 2597 | struct intel_context *intel = &p->brw->intel; |
| 2598 | assert(intel->gen >= 7); |
| 2599 | |
| 2600 | brw_push_insn_state(p); |
| 2601 | brw_set_access_mode(p, BRW_ALIGN_1); |
| 2602 | brw_set_mask_control(p, BRW_MASK_DISABLE); |
| 2603 | struct brw_instruction *send = brw_next_insn(p, BRW_OPCODE_SEND); |
| 2604 | brw_pop_insn_state(p); |
| 2605 | |
| 2606 | /* We use brw_vec1_reg and unmasked because we want to increment the given |
| 2607 | * offset only once. |
| 2608 | */ |
| 2609 | brw_set_dest(p, send, brw_vec1_reg(BRW_ARCHITECTURE_REGISTER_FILE, |
| 2610 | BRW_ARF_NULL, 0)); |
| 2611 | brw_set_src0(p, send, brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE, |
| 2612 | base_mrf, 0)); |
| 2613 | |
| 2614 | bool header_present = false; |
| 2615 | bool eot = false; |
| 2616 | uint32_t mlen = 2; /* offset, value */ |
| 2617 | uint32_t rlen = 0; |
| 2618 | brw_set_message_descriptor(p, send, |
| 2619 | GEN7_SFID_DATAPORT_DATA_CACHE, |
| 2620 | mlen, rlen, header_present, eot); |
| 2621 | |
| 2622 | send->bits3.ud |= 6 << 14; /* untyped atomic op */ |
| 2623 | send->bits3.ud |= 0 << 13; /* no return data */ |
| 2624 | send->bits3.ud |= 1 << 12; /* SIMD8 mode */ |
| 2625 | send->bits3.ud |= BRW_AOP_ADD << 8; |
| 2626 | send->bits3.ud |= surf_index << 0; |
| 2627 | } |