src/gallium/drivers/r300/r300_tgsi_to_rc.c

   1 /*
   2  * Copyright 2009 Nicolai Hähnle <nhaehnle@gmail.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE COPYRIGHT HOLDER(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  22
  23 #include "r300_tgsi_to_rc.h"
  24
  25 #include "radeon_compiler.h"
  26 #include "radeon_program.h"
  27
  28 #include "tgsi/tgsi_info.h"
  29 #include "tgsi/tgsi_parse.h"
  30 #include "tgsi/tgsi_scan.h"
  31 #include "tgsi/tgsi_util.h"
  32
  33 static unsigned translate_opcode(unsigned opcode)
  34 {
  35     switch(opcode) {
  36         case TGSI_OPCODE_ARL: return RC_OPCODE_ARL;
  37         case TGSI_OPCODE_MOV: return RC_OPCODE_MOV;
  38         case TGSI_OPCODE_LIT: return RC_OPCODE_LIT;
  39         case TGSI_OPCODE_RCP: return RC_OPCODE_RCP;
  40         case TGSI_OPCODE_RSQ: return RC_OPCODE_RSQ;
  41         case TGSI_OPCODE_EXP: return RC_OPCODE_EXP;
  42         case TGSI_OPCODE_LOG: return RC_OPCODE_LOG;
  43         case TGSI_OPCODE_MUL: return RC_OPCODE_MUL;
  44         case TGSI_OPCODE_ADD: return RC_OPCODE_ADD;
  45         case TGSI_OPCODE_DP3: return RC_OPCODE_DP3;
  46         case TGSI_OPCODE_DP4: return RC_OPCODE_DP4;
  47         case TGSI_OPCODE_DST: return RC_OPCODE_DST;
  48         case TGSI_OPCODE_MIN: return RC_OPCODE_MIN;
  49         case TGSI_OPCODE_MAX: return RC_OPCODE_MAX;
  50         case TGSI_OPCODE_SLT: return RC_OPCODE_SLT;
  51         case TGSI_OPCODE_SGE: return RC_OPCODE_SGE;
  52         case TGSI_OPCODE_MAD: return RC_OPCODE_MAD;
  53         case TGSI_OPCODE_SUB: return RC_OPCODE_SUB;
  54         case TGSI_OPCODE_LRP: return RC_OPCODE_LRP;
  55         case TGSI_OPCODE_CND: return RC_OPCODE_CND;
  56      /* case TGSI_OPCODE_DP2A: return RC_OPCODE_DP2A; */
  57                                         /* gap */
  58         case TGSI_OPCODE_FRC: return RC_OPCODE_FRC;
  59         case TGSI_OPCODE_CLAMP: return RC_OPCODE_CLAMP;
  60         case TGSI_OPCODE_FLR: return RC_OPCODE_FLR;
  61      /* case TGSI_OPCODE_ROUND: return RC_OPCODE_ROUND; */
  62         case TGSI_OPCODE_EX2: return RC_OPCODE_EX2;
  63         case TGSI_OPCODE_LG2: return RC_OPCODE_LG2;
  64         case TGSI_OPCODE_POW: return RC_OPCODE_POW;
  65         case TGSI_OPCODE_XPD: return RC_OPCODE_XPD;
  66                                         /* gap */
  67         case TGSI_OPCODE_ABS: return RC_OPCODE_ABS;
  68      /* case TGSI_OPCODE_RCC: return RC_OPCODE_RCC; */
  69         case TGSI_OPCODE_DPH: return RC_OPCODE_DPH;
  70         case TGSI_OPCODE_COS: return RC_OPCODE_COS;
  71         case TGSI_OPCODE_DDX: return RC_OPCODE_DDX;
  72         case TGSI_OPCODE_DDY: return RC_OPCODE_DDY;
  73         case TGSI_OPCODE_KILP: return RC_OPCODE_KILP;
  74      /* case TGSI_OPCODE_PK2H: return RC_OPCODE_PK2H; */
  75      /* case TGSI_OPCODE_PK2US: return RC_OPCODE_PK2US; */
  76      /* case TGSI_OPCODE_PK4B: return RC_OPCODE_PK4B; */
  77      /* case TGSI_OPCODE_PK4UB: return RC_OPCODE_PK4UB; */
  78      /* case TGSI_OPCODE_RFL: return RC_OPCODE_RFL; */
  79         case TGSI_OPCODE_SEQ: return RC_OPCODE_SEQ;
  80         case TGSI_OPCODE_SFL: return RC_OPCODE_SFL;
  81         case TGSI_OPCODE_SGT: return RC_OPCODE_SGT;
  82         case TGSI_OPCODE_SIN: return RC_OPCODE_SIN;
  83         case TGSI_OPCODE_SLE: return RC_OPCODE_SLE;
  84         case TGSI_OPCODE_SNE: return RC_OPCODE_SNE;
  85      /* case TGSI_OPCODE_STR: return RC_OPCODE_STR; */
  86         case TGSI_OPCODE_TEX: return RC_OPCODE_TEX;
  87         case TGSI_OPCODE_TXD: return RC_OPCODE_TXD;
  88         case TGSI_OPCODE_TXP: return RC_OPCODE_TXP;
  89      /* case TGSI_OPCODE_UP2H: return RC_OPCODE_UP2H; */
  90      /* case TGSI_OPCODE_UP2US: return RC_OPCODE_UP2US; */
  91      /* case TGSI_OPCODE_UP4B: return RC_OPCODE_UP4B; */
  92      /* case TGSI_OPCODE_UP4UB: return RC_OPCODE_UP4UB; */
  93      /* case TGSI_OPCODE_X2D: return RC_OPCODE_X2D; */
  94      /* case TGSI_OPCODE_ARA: return RC_OPCODE_ARA; */
  95      /* case TGSI_OPCODE_ARR: return RC_OPCODE_ARR; */
  96      /* case TGSI_OPCODE_BRA: return RC_OPCODE_BRA; */
  97      /* case TGSI_OPCODE_CAL: return RC_OPCODE_CAL; */
  98      /* case TGSI_OPCODE_RET: return RC_OPCODE_RET; */
  99         case TGSI_OPCODE_SSG: return RC_OPCODE_SSG;
 100         case TGSI_OPCODE_CMP: return RC_OPCODE_CMP;
 101         case TGSI_OPCODE_SCS: return RC_OPCODE_SCS;
 102         case TGSI_OPCODE_TXB: return RC_OPCODE_TXB;
 103      /* case TGSI_OPCODE_NRM: return RC_OPCODE_NRM; */
 104      /* case TGSI_OPCODE_DIV: return RC_OPCODE_DIV; */
 105         case TGSI_OPCODE_DP2: return RC_OPCODE_DP2;
 106         case TGSI_OPCODE_TXL: return RC_OPCODE_TXL;
 107         case TGSI_OPCODE_BRK: return RC_OPCODE_BRK;
 108         case TGSI_OPCODE_IF: return RC_OPCODE_IF;
 109         case TGSI_OPCODE_BGNLOOP: return RC_OPCODE_BGNLOOP;
 110         case TGSI_OPCODE_ELSE: return RC_OPCODE_ELSE;
 111         case TGSI_OPCODE_ENDIF: return RC_OPCODE_ENDIF;
 112         case TGSI_OPCODE_ENDLOOP: return RC_OPCODE_ENDLOOP;
 113      /* case TGSI_OPCODE_PUSHA: return RC_OPCODE_PUSHA; */
 114      /* case TGSI_OPCODE_POPA: return RC_OPCODE_POPA; */
 115         case TGSI_OPCODE_CEIL: return RC_OPCODE_CEIL;
 116      /* case TGSI_OPCODE_I2F: return RC_OPCODE_I2F; */
 117      /* case TGSI_OPCODE_NOT: return RC_OPCODE_NOT; */
 118         case TGSI_OPCODE_TRUNC: return RC_OPCODE_FLR;
 119      /* case TGSI_OPCODE_SHL: return RC_OPCODE_SHL; */
 120      /* case TGSI_OPCODE_ISHR: return RC_OPCODE_SHR; */
 121      /* case TGSI_OPCODE_AND: return RC_OPCODE_AND; */
 122      /* case TGSI_OPCODE_OR: return RC_OPCODE_OR; */
 123      /* case TGSI_OPCODE_MOD: return RC_OPCODE_MOD; */
 124      /* case TGSI_OPCODE_XOR: return RC_OPCODE_XOR; */
 125      /* case TGSI_OPCODE_SAD: return RC_OPCODE_SAD; */
 126      /* case TGSI_OPCODE_TXF: return RC_OPCODE_TXF; */
 127      /* case TGSI_OPCODE_TXQ: return RC_OPCODE_TXQ; */
 128         case TGSI_OPCODE_CONT: return RC_OPCODE_CONT;
 129      /* case TGSI_OPCODE_EMIT: return RC_OPCODE_EMIT; */
 130      /* case TGSI_OPCODE_ENDPRIM: return RC_OPCODE_ENDPRIM; */
 131      /* case TGSI_OPCODE_BGNLOOP2: return RC_OPCODE_BGNLOOP2; */
 132      /* case TGSI_OPCODE_BGNSUB: return RC_OPCODE_BGNSUB; */
 133      /* case TGSI_OPCODE_ENDLOOP2: return RC_OPCODE_ENDLOOP2; */
 134      /* case TGSI_OPCODE_ENDSUB: return RC_OPCODE_ENDSUB; */
 135         case TGSI_OPCODE_NOP: return RC_OPCODE_NOP;
 136                                         /* gap */
 137      /* case TGSI_OPCODE_NRM4: return RC_OPCODE_NRM4; */
 138      /* case TGSI_OPCODE_CALLNZ: return RC_OPCODE_CALLNZ; */
 139      /* case TGSI_OPCODE_IFC: return RC_OPCODE_IFC; */
 140      /* case TGSI_OPCODE_BREAKC: return RC_OPCODE_BREAKC; */
 141         case TGSI_OPCODE_KIL: return RC_OPCODE_KIL;
 142     }
 143
 144     fprintf(stderr, "r300: Unknown TGSI/RC opcode: %s\n", tgsi_get_opcode_name(opcode));
 145     return RC_OPCODE_ILLEGAL_OPCODE;
 146 }
 147
 148 static unsigned translate_saturate(unsigned saturate)
 149 {
 150     switch(saturate) {
 151         default:
 152             fprintf(stderr, "Unknown saturate mode: %i\n", saturate);
 153             /* fall-through */
 154         case TGSI_SAT_NONE: return RC_SATURATE_NONE;
 155         case TGSI_SAT_ZERO_ONE: return RC_SATURATE_ZERO_ONE;
 156     }
 157 }
 158
 159 static unsigned translate_register_file(unsigned file)
 160 {
 161     switch(file) {
 162         case TGSI_FILE_CONSTANT: return RC_FILE_CONSTANT;
 163         case TGSI_FILE_IMMEDIATE: return RC_FILE_CONSTANT;
 164         case TGSI_FILE_INPUT: return RC_FILE_INPUT;
 165         case TGSI_FILE_OUTPUT: return RC_FILE_OUTPUT;
 166         default:
 167             fprintf(stderr, "Unhandled register file: %i\n", file);
 168             /* fall-through */
 169         case TGSI_FILE_TEMPORARY: return RC_FILE_TEMPORARY;
 170         case TGSI_FILE_ADDRESS: return RC_FILE_ADDRESS;
 171     }
 172 }
 173
 174 static int translate_register_index(
 175     struct tgsi_to_rc * ttr,
 176     unsigned file,
 177     int index)
 178 {
 179     if (file == TGSI_FILE_IMMEDIATE)
 180         return ttr->immediate_offset + index;
 181
 182     return index;
 183 }
 184
 185 static void transform_dstreg(
 186     struct tgsi_to_rc * ttr,
 187     struct rc_dst_register * dst,
 188     struct tgsi_full_dst_register * src)
 189 {
 190     dst->File = translate_register_file(src->Register.File);
 191     dst->Index = translate_register_index(ttr, src->Register.File, src->Register.Index);
 192     dst->WriteMask = src->Register.WriteMask;
 193
 194     if (src->Register.Indirect) {
 195         ttr->error = TRUE;
 196         fprintf(stderr, "r300: Relative addressing of destination operands "
 197                 "is unsupported.\n");
 198     }
 199 }
 200
 201 static void transform_srcreg(
 202     struct tgsi_to_rc * ttr,
 203     struct rc_src_register * dst,
 204     struct tgsi_full_src_register * src)
 205 {
 206     unsigned i, j;
 207
 208     dst->File = translate_register_file(src->Register.File);
 209     dst->Index = translate_register_index(ttr, src->Register.File, src->Register.Index);
 210     dst->RelAddr = src->Register.Indirect;
 211     dst->Swizzle = tgsi_util_get_full_src_register_swizzle(src, 0);
 212     dst->Swizzle |= tgsi_util_get_full_src_register_swizzle(src, 1) << 3;
 213     dst->Swizzle |= tgsi_util_get_full_src_register_swizzle(src, 2) << 6;
 214     dst->Swizzle |= tgsi_util_get_full_src_register_swizzle(src, 3) << 9;
 215     dst->Abs = src->Register.Absolute;
 216     dst->Negate = src->Register.Negate ? RC_MASK_XYZW : 0;
 217
 218     if (src->Register.File == TGSI_FILE_IMMEDIATE) {
 219         for (i = 0; i < ttr->imms_to_swizzle_count; i++) {
 220             if (ttr->imms_to_swizzle[i].index == src->Register.Index) {
 221                 dst->File = RC_FILE_TEMPORARY;
 222                 dst->Index = 0;
 223                 dst->Swizzle = 0;
 224                 for (j = 0; j < 4; j++) {
 225                     dst->Swizzle |= GET_SWZ(ttr->imms_to_swizzle[i].swizzle,
 226                         tgsi_util_get_full_src_register_swizzle(src, j)) << (j * 3);
 227                 }
 228                 break;
 229             }
 230         }
 231     }
 232 }
 233
 234 static void transform_texture(struct rc_instruction * dst, struct tgsi_instruction_texture src,
 235                               uint32_t *shadowSamplers)
 236 {
 237     switch(src.Texture) {
 238         case TGSI_TEXTURE_1D:
 239             dst->U.I.TexSrcTarget = RC_TEXTURE_1D;
 240             break;
 241         case TGSI_TEXTURE_2D:
 242             dst->U.I.TexSrcTarget = RC_TEXTURE_2D;
 243             break;
 244         case TGSI_TEXTURE_3D:
 245             dst->U.I.TexSrcTarget = RC_TEXTURE_3D;
 246             break;
 247         case TGSI_TEXTURE_CUBE:
 248             dst->U.I.TexSrcTarget = RC_TEXTURE_CUBE;
 249             break;
 250         case TGSI_TEXTURE_RECT:
 251             dst->U.I.TexSrcTarget = RC_TEXTURE_RECT;
 252             break;
 253         case TGSI_TEXTURE_SHADOW1D:
 254             dst->U.I.TexSrcTarget = RC_TEXTURE_1D;
 255             dst->U.I.TexShadow = 1;
 256             *shadowSamplers |= 1 << dst->U.I.TexSrcUnit;
 257             break;
 258         case TGSI_TEXTURE_SHADOW2D:
 259             dst->U.I.TexSrcTarget = RC_TEXTURE_2D;
 260             dst->U.I.TexShadow = 1;
 261             *shadowSamplers |= 1 << dst->U.I.TexSrcUnit;
 262             break;
 263         case TGSI_TEXTURE_SHADOWRECT:
 264             dst->U.I.TexSrcTarget = RC_TEXTURE_RECT;
 265             dst->U.I.TexShadow = 1;
 266             *shadowSamplers |= 1 << dst->U.I.TexSrcUnit;
 267             break;
 268     }
 269     dst->U.I.TexSwizzle = RC_SWIZZLE_XYZW;
 270 }
 271
 272 static void transform_instruction(struct tgsi_to_rc * ttr, struct tgsi_full_instruction * src)
 273 {
 274     struct rc_instruction * dst;
 275     int i;
 276
 277     dst = rc_insert_new_instruction(ttr->compiler, ttr->compiler->Program.Instructions.Prev);
 278     dst->U.I.Opcode = translate_opcode(src->Instruction.Opcode);
 279     dst->U.I.SaturateMode = translate_saturate(src->Instruction.Saturate);
 280
 281     if (src->Instruction.NumDstRegs)
 282         transform_dstreg(ttr, &dst->U.I.DstReg, &src->Dst[0]);
 283
 284     for(i = 0; i < src->Instruction.NumSrcRegs; ++i) {
 285         if (src->Src[i].Register.File == TGSI_FILE_SAMPLER)
 286             dst->U.I.TexSrcUnit = src->Src[i].Register.Index;
 287         else
 288             transform_srcreg(ttr, &dst->U.I.SrcReg[i], &src->Src[i]);
 289     }
 290
 291     /* Texturing. */
 292     if (src->Instruction.Texture)
 293         transform_texture(dst, src->Texture,
 294                           &ttr->compiler->Program.ShadowSamplers);
 295 }
 296
 297 static void handle_immediate(struct tgsi_to_rc * ttr,
 298                              struct tgsi_full_immediate * imm,
 299                              unsigned index)
 300 {
 301     struct rc_constant constant;
 302     unsigned swizzle = 0;
 303     boolean can_swizzle = TRUE;
 304     unsigned i;
 305
 306     for (i = 0; i < 4; i++) {
 307         if (imm->u[i].Float == 0.0f) {
 308             swizzle |= RC_SWIZZLE_ZERO << (i * 3);
 309         } else if (imm->u[i].Float == 0.5f && ttr->use_half_swizzles) {
 310             swizzle |= RC_SWIZZLE_HALF << (i * 3);
 311         } else if (imm->u[i].Float == 1.0f) {
 312             swizzle |= RC_SWIZZLE_ONE << (i * 3);
 313         } else {
 314             can_swizzle = FALSE;
 315             break;
 316         }
 317     }
 318
 319     if (can_swizzle) {
 320         ttr->imms_to_swizzle[ttr->imms_to_swizzle_count].index = index;
 321         ttr->imms_to_swizzle[ttr->imms_to_swizzle_count].swizzle = swizzle;
 322         ttr->imms_to_swizzle_count++;
 323     } else {
 324         constant.Type = RC_CONSTANT_IMMEDIATE;
 325         constant.Size = 4;
 326         for(i = 0; i < 4; ++i)
 327             constant.u.Immediate[i] = imm->u[i].Float;
 328         rc_constants_add(&ttr->compiler->Program.Constants, &constant);
 329     }
 330 }
 331
 332 void r300_tgsi_to_rc(struct tgsi_to_rc * ttr,
 333                      const struct tgsi_token * tokens)
 334 {
 335     struct tgsi_full_instruction *inst;
 336     struct tgsi_parse_context parser;
 337     unsigned imm_index = 0;
 338     int i;
 339
 340     ttr->error = FALSE;
 341
 342     /* Allocate constants placeholders.
 343      *
 344      * Note: What if declared constants are not contiguous? */
 345     for(i = 0; i <= ttr->info->file_max[TGSI_FILE_CONSTANT]; ++i) {
 346         struct rc_constant constant;
 347         memset(&constant, 0, sizeof(constant));
 348         constant.Type = RC_CONSTANT_EXTERNAL;
 349         constant.Size = 4;
 350         constant.u.External = i;
 351         rc_constants_add(&ttr->compiler->Program.Constants, &constant);
 352     }
 353
 354     ttr->immediate_offset = ttr->compiler->Program.Constants.Count;
 355
 356     ttr->imms_to_swizzle = malloc(ttr->info->immediate_count * sizeof(struct swizzled_imms));
 357     ttr->imms_to_swizzle_count = 0;
 358
 359     tgsi_parse_init(&parser, tokens);
 360
 361     while (!tgsi_parse_end_of_tokens(&parser)) {
 362         tgsi_parse_token(&parser);
 363
 364         switch (parser.FullToken.Token.Type) {
 365             case TGSI_TOKEN_TYPE_DECLARATION:
 366                 break;
 367             case TGSI_TOKEN_TYPE_IMMEDIATE:
 368                 handle_immediate(ttr, &parser.FullToken.FullImmediate, imm_index);
 369                 imm_index++;
 370                 break;
 371             case TGSI_TOKEN_TYPE_INSTRUCTION:
 372                 inst = &parser.FullToken.FullInstruction;
 373                 if (inst->Instruction.Opcode == TGSI_OPCODE_END) {
 374                     break;
 375                 }
 376
 377                 transform_instruction(ttr, inst);
 378                 break;
 379         }
 380     }
 381
 382     tgsi_parse_free(&parser);
 383
 384     free(ttr->imms_to_swizzle);
 385
 386     rc_calculate_inputs_outputs(ttr->compiler);
 387 }