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_CND0: return RC_OPCODE_CND0; */
  57      /* case TGSI_OPCODE_DP2A: return RC_OPCODE_DP2A; */
  58                                         /* gap */
  59         case TGSI_OPCODE_FRC: return RC_OPCODE_FRC;
  60      /* case TGSI_OPCODE_CLAMP: return RC_OPCODE_CLAMP; */
  61         case TGSI_OPCODE_FLR: return RC_OPCODE_FLR;
  62      /* case TGSI_OPCODE_ROUND: return RC_OPCODE_ROUND; */
  63         case TGSI_OPCODE_EX2: return RC_OPCODE_EX2;
  64         case TGSI_OPCODE_LG2: return RC_OPCODE_LG2;
  65         case TGSI_OPCODE_POW: return RC_OPCODE_POW;
  66         case TGSI_OPCODE_XPD: return RC_OPCODE_XPD;
  67                                         /* gap */
  68         case TGSI_OPCODE_ABS: return RC_OPCODE_ABS;
  69      /* case TGSI_OPCODE_RCC: return RC_OPCODE_RCC; */
  70         case TGSI_OPCODE_DPH: return RC_OPCODE_DPH;
  71         case TGSI_OPCODE_COS: return RC_OPCODE_COS;
  72         case TGSI_OPCODE_DDX: return RC_OPCODE_DDX;
  73         case TGSI_OPCODE_DDY: return RC_OPCODE_DDY;
  74         case TGSI_OPCODE_KILP: return RC_OPCODE_KILP;
  75      /* case TGSI_OPCODE_PK2H: return RC_OPCODE_PK2H; */
  76      /* case TGSI_OPCODE_PK2US: return RC_OPCODE_PK2US; */
  77      /* case TGSI_OPCODE_PK4B: return RC_OPCODE_PK4B; */
  78      /* case TGSI_OPCODE_PK4UB: return RC_OPCODE_PK4UB; */
  79      /* case TGSI_OPCODE_RFL: return RC_OPCODE_RFL; */
  80         case TGSI_OPCODE_SEQ: return RC_OPCODE_SEQ;
  81         case TGSI_OPCODE_SFL: return RC_OPCODE_SFL;
  82         case TGSI_OPCODE_SGT: return RC_OPCODE_SGT;
  83         case TGSI_OPCODE_SIN: return RC_OPCODE_SIN;
  84         case TGSI_OPCODE_SLE: return RC_OPCODE_SLE;
  85         case TGSI_OPCODE_SNE: return RC_OPCODE_SNE;
  86      /* case TGSI_OPCODE_STR: return RC_OPCODE_STR; */
  87         case TGSI_OPCODE_TEX: return RC_OPCODE_TEX;
  88         case TGSI_OPCODE_TXD: return RC_OPCODE_TXD;
  89         case TGSI_OPCODE_TXP: return RC_OPCODE_TXP;
  90      /* case TGSI_OPCODE_UP2H: return RC_OPCODE_UP2H; */
  91      /* case TGSI_OPCODE_UP2US: return RC_OPCODE_UP2US; */
  92      /* case TGSI_OPCODE_UP4B: return RC_OPCODE_UP4B; */
  93      /* case TGSI_OPCODE_UP4UB: return RC_OPCODE_UP4UB; */
  94      /* case TGSI_OPCODE_X2D: return RC_OPCODE_X2D; */
  95      /* case TGSI_OPCODE_ARA: return RC_OPCODE_ARA; */
  96      /* case TGSI_OPCODE_ARR: return RC_OPCODE_ARR; */
  97      /* case TGSI_OPCODE_BRA: return RC_OPCODE_BRA; */
  98      /* case TGSI_OPCODE_CAL: return RC_OPCODE_CAL; */
  99      /* case TGSI_OPCODE_RET: return RC_OPCODE_RET; */
 100      /* case TGSI_OPCODE_SSG: return RC_OPCODE_SSG; */
 101         case TGSI_OPCODE_CMP: return RC_OPCODE_CMP;
 102         case TGSI_OPCODE_SCS: return RC_OPCODE_SCS;
 103         case TGSI_OPCODE_TXB: return RC_OPCODE_TXB;
 104      /* case TGSI_OPCODE_NRM: return RC_OPCODE_NRM; */
 105      /* case TGSI_OPCODE_DIV: return RC_OPCODE_DIV; */
 106      /* case TGSI_OPCODE_DP2: return RC_OPCODE_DP2; */
 107         case TGSI_OPCODE_TXL: return RC_OPCODE_TXL;
 108         case TGSI_OPCODE_BRK: return RC_OPCODE_BRK;
 109         case TGSI_OPCODE_IF: return RC_OPCODE_IF;
 110         case TGSI_OPCODE_BGNLOOP: return RC_OPCODE_BGNLOOP;
 111         case TGSI_OPCODE_ELSE: return RC_OPCODE_ELSE;
 112         case TGSI_OPCODE_ENDIF: return RC_OPCODE_ENDIF;
 113         case TGSI_OPCODE_ENDLOOP: return RC_OPCODE_ENDLOOP;
 114      /* case TGSI_OPCODE_PUSHA: return RC_OPCODE_PUSHA; */
 115      /* case TGSI_OPCODE_POPA: return RC_OPCODE_POPA; */
 116         case TGSI_OPCODE_CEIL: return RC_OPCODE_CEIL;
 117      /* case TGSI_OPCODE_I2F: return RC_OPCODE_I2F; */
 118      /* case TGSI_OPCODE_NOT: return RC_OPCODE_NOT; */
 119         case TGSI_OPCODE_TRUNC: return RC_OPCODE_FLR;
 120      /* case TGSI_OPCODE_SHL: return RC_OPCODE_SHL; */
 121      /* case TGSI_OPCODE_ISHR: return RC_OPCODE_SHR; */
 122      /* case TGSI_OPCODE_AND: return RC_OPCODE_AND; */
 123      /* case TGSI_OPCODE_OR: return RC_OPCODE_OR; */
 124      /* case TGSI_OPCODE_MOD: return RC_OPCODE_MOD; */
 125      /* case TGSI_OPCODE_XOR: return RC_OPCODE_XOR; */
 126      /* case TGSI_OPCODE_SAD: return RC_OPCODE_SAD; */
 127      /* case TGSI_OPCODE_TXF: return RC_OPCODE_TXF; */
 128      /* case TGSI_OPCODE_TXQ: return RC_OPCODE_TXQ; */
 129      /* case TGSI_OPCODE_CONT: return RC_OPCODE_CONT; */
 130      /* case TGSI_OPCODE_EMIT: return RC_OPCODE_EMIT; */
 131      /* case TGSI_OPCODE_ENDPRIM: return RC_OPCODE_ENDPRIM; */
 132      /* case TGSI_OPCODE_BGNLOOP2: return RC_OPCODE_BGNLOOP2; */
 133      /* case TGSI_OPCODE_BGNSUB: return RC_OPCODE_BGNSUB; */
 134      /* case TGSI_OPCODE_ENDLOOP2: return RC_OPCODE_ENDLOOP2; */
 135      /* case TGSI_OPCODE_ENDSUB: return RC_OPCODE_ENDSUB; */
 136         case TGSI_OPCODE_NOP: return RC_OPCODE_NOP;
 137                                         /* gap */
 138      /* case TGSI_OPCODE_NRM4: return RC_OPCODE_NRM4; */
 139      /* case TGSI_OPCODE_CALLNZ: return RC_OPCODE_CALLNZ; */
 140      /* case TGSI_OPCODE_IFC: return RC_OPCODE_IFC; */
 141      /* case TGSI_OPCODE_BREAKC: return RC_OPCODE_BREAKC; */
 142         case TGSI_OPCODE_KIL: return RC_OPCODE_KIL;
 143     }
 144
 145     fprintf(stderr, "r300: Unknown TGSI/RC opcode: %s\n", tgsi_get_opcode_name(opcode));
 146     return RC_OPCODE_ILLEGAL_OPCODE;
 147 }
 148
 149 static unsigned translate_saturate(unsigned saturate)
 150 {
 151     switch(saturate) {
 152         default:
 153             fprintf(stderr, "Unknown saturate mode: %i\n", saturate);
 154             /* fall-through */
 155         case TGSI_SAT_NONE: return RC_SATURATE_NONE;
 156         case TGSI_SAT_ZERO_ONE: return RC_SATURATE_ZERO_ONE;
 157     }
 158 }
 159
 160 static unsigned translate_register_file(unsigned file)
 161 {
 162     switch(file) {
 163         case TGSI_FILE_CONSTANT: return RC_FILE_CONSTANT;
 164         case TGSI_FILE_IMMEDIATE: return RC_FILE_CONSTANT;
 165         case TGSI_FILE_INPUT: return RC_FILE_INPUT;
 166         case TGSI_FILE_OUTPUT: return RC_FILE_OUTPUT;
 167         default:
 168             fprintf(stderr, "Unhandled register file: %i\n", file);
 169             /* fall-through */
 170         case TGSI_FILE_TEMPORARY: return RC_FILE_TEMPORARY;
 171         case TGSI_FILE_ADDRESS: return RC_FILE_ADDRESS;
 172     }
 173 }
 174
 175 static int translate_register_index(
 176     struct tgsi_to_rc * ttr,
 177     unsigned file,
 178     int index)
 179 {
 180     if (file == TGSI_FILE_IMMEDIATE)
 181         return ttr->immediate_offset + index;
 182
 183     return index;
 184 }
 185
 186 static void transform_dstreg(
 187     struct tgsi_to_rc * ttr,
 188     struct rc_dst_register * dst,
 189     struct tgsi_full_dst_register * src)
 190 {
 191     dst->File = translate_register_file(src->Register.File);
 192     dst->Index = translate_register_index(ttr, src->Register.File, src->Register.Index);
 193     dst->WriteMask = src->Register.WriteMask;
 194     dst->RelAddr = src->Register.Indirect;
 195 }
 196
 197 static void transform_srcreg(
 198     struct tgsi_to_rc * ttr,
 199     struct rc_src_register * dst,
 200     struct tgsi_full_src_register * src)
 201 {
 202     unsigned i, j;
 203
 204     dst->File = translate_register_file(src->Register.File);
 205     dst->Index = translate_register_index(ttr, src->Register.File, src->Register.Index);
 206     dst->RelAddr = src->Register.Indirect;
 207     dst->Swizzle = tgsi_util_get_full_src_register_swizzle(src, 0);
 208     dst->Swizzle |= tgsi_util_get_full_src_register_swizzle(src, 1) << 3;
 209     dst->Swizzle |= tgsi_util_get_full_src_register_swizzle(src, 2) << 6;
 210     dst->Swizzle |= tgsi_util_get_full_src_register_swizzle(src, 3) << 9;
 211     dst->Abs = src->Register.Absolute;
 212     dst->Negate = src->Register.Negate ? RC_MASK_XYZW : 0;
 213
 214     if (src->Register.File == TGSI_FILE_IMMEDIATE) {
 215         for (i = 0; i < ttr->imms_to_swizzle_count; i++) {
 216             if (ttr->imms_to_swizzle[i].index == src->Register.Index) {
 217                 dst->File = RC_FILE_TEMPORARY;
 218                 dst->Index = 0;
 219                 dst->Swizzle = 0;
 220                 for (j = 0; j < 4; j++) {
 221                     dst->Swizzle |= GET_SWZ(ttr->imms_to_swizzle[i].swizzle,
 222                         tgsi_util_get_full_src_register_swizzle(src, j)) << (j * 3);
 223                 }
 224                 break;
 225             }
 226         }
 227     }
 228 }
 229
 230 static void transform_texture(struct rc_instruction * dst, struct tgsi_instruction_texture src,
 231                               uint32_t *shadowSamplers)
 232 {
 233     switch(src.Texture) {
 234         case TGSI_TEXTURE_1D:
 235             dst->U.I.TexSrcTarget = RC_TEXTURE_1D;
 236             break;
 237         case TGSI_TEXTURE_2D:
 238             dst->U.I.TexSrcTarget = RC_TEXTURE_2D;
 239             break;
 240         case TGSI_TEXTURE_3D:
 241             dst->U.I.TexSrcTarget = RC_TEXTURE_3D;
 242             break;
 243         case TGSI_TEXTURE_CUBE:
 244             dst->U.I.TexSrcTarget = RC_TEXTURE_CUBE;
 245             break;
 246         case TGSI_TEXTURE_RECT:
 247             dst->U.I.TexSrcTarget = RC_TEXTURE_RECT;
 248             break;
 249         case TGSI_TEXTURE_SHADOW1D:
 250             dst->U.I.TexSrcTarget = RC_TEXTURE_1D;
 251             dst->U.I.TexShadow = 1;
 252             *shadowSamplers |= 1 << dst->U.I.TexSrcUnit;
 253             break;
 254         case TGSI_TEXTURE_SHADOW2D:
 255             dst->U.I.TexSrcTarget = RC_TEXTURE_2D;
 256             dst->U.I.TexShadow = 1;
 257             *shadowSamplers |= 1 << dst->U.I.TexSrcUnit;
 258             break;
 259         case TGSI_TEXTURE_SHADOWRECT:
 260             dst->U.I.TexSrcTarget = RC_TEXTURE_RECT;
 261             dst->U.I.TexShadow = 1;
 262             *shadowSamplers |= 1 << dst->U.I.TexSrcUnit;
 263             break;
 264     }
 265 }
 266
 267 static void transform_instruction(struct tgsi_to_rc * ttr, struct tgsi_full_instruction * src)
 268 {
 269     struct rc_instruction * dst;
 270     int i;
 271
 272     dst = rc_insert_new_instruction(ttr->compiler, ttr->compiler->Program.Instructions.Prev);
 273     dst->U.I.Opcode = translate_opcode(src->Instruction.Opcode);
 274     dst->U.I.SaturateMode = translate_saturate(src->Instruction.Saturate);
 275
 276     if (src->Instruction.NumDstRegs)
 277         transform_dstreg(ttr, &dst->U.I.DstReg, &src->Dst[0]);
 278
 279     for(i = 0; i < src->Instruction.NumSrcRegs; ++i) {
 280         if (src->Src[i].Register.File == TGSI_FILE_SAMPLER)
 281             dst->U.I.TexSrcUnit = src->Src[i].Register.Index;
 282         else
 283             transform_srcreg(ttr, &dst->U.I.SrcReg[i], &src->Src[i]);
 284     }
 285
 286     /* Texturing. */
 287     if (src->Instruction.Texture)
 288         transform_texture(dst, src->Texture,
 289                           &ttr->compiler->Program.ShadowSamplers);
 290 }
 291
 292 static void handle_immediate(struct tgsi_to_rc * ttr,
 293                              struct tgsi_full_immediate * imm,
 294                              unsigned index)
 295 {
 296     struct rc_constant constant;
 297     unsigned swizzle = 0;
 298     boolean can_swizzle = TRUE;
 299     unsigned i;
 300
 301     for (i = 0; i < 4; i++) {
 302         if (imm->u[i].Float == 0.0f) {
 303             swizzle |= RC_SWIZZLE_ZERO << (i * 3);
 304         } else if (imm->u[i].Float == 0.5f && ttr->use_half_swizzles) {
 305             swizzle |= RC_SWIZZLE_HALF << (i * 3);
 306         } else if (imm->u[i].Float == 1.0f) {
 307             swizzle |= RC_SWIZZLE_ONE << (i * 3);
 308         } else {
 309             can_swizzle = FALSE;
 310             break;
 311         }
 312     }
 313
 314     if (can_swizzle) {
 315         ttr->imms_to_swizzle[ttr->imms_to_swizzle_count].index = index;
 316         ttr->imms_to_swizzle[ttr->imms_to_swizzle_count].swizzle = swizzle;
 317         ttr->imms_to_swizzle_count++;
 318     } else {
 319         constant.Type = RC_CONSTANT_IMMEDIATE;
 320         constant.Size = 4;
 321         for(i = 0; i < 4; ++i)
 322             constant.u.Immediate[i] = imm->u[i].Float;
 323         rc_constants_add(&ttr->compiler->Program.Constants, &constant);
 324     }
 325 }
 326
 327 void r300_tgsi_to_rc(struct tgsi_to_rc * ttr,
 328                      const struct tgsi_token * tokens)
 329 {
 330     struct tgsi_full_instruction *inst;
 331     struct tgsi_parse_context parser;
 332     unsigned imm_index = 0;
 333     int i;
 334
 335     /* Allocate constants placeholders.
 336      *
 337      * Note: What if declared constants are not contiguous? */
 338     for(i = 0; i <= ttr->info->file_max[TGSI_FILE_CONSTANT]; ++i) {
 339         struct rc_constant constant;
 340         memset(&constant, 0, sizeof(constant));
 341         constant.Type = RC_CONSTANT_EXTERNAL;
 342         constant.Size = 4;
 343         constant.u.External = i;
 344         rc_constants_add(&ttr->compiler->Program.Constants, &constant);
 345     }
 346
 347     ttr->immediate_offset = ttr->compiler->Program.Constants.Count;
 348
 349     ttr->imms_to_swizzle = malloc(ttr->info->immediate_count * sizeof(struct swizzled_imms));
 350     ttr->imms_to_swizzle_count = 0;
 351
 352     tgsi_parse_init(&parser, tokens);
 353
 354     while (!tgsi_parse_end_of_tokens(&parser)) {
 355         tgsi_parse_token(&parser);
 356
 357         switch (parser.FullToken.Token.Type) {
 358             case TGSI_TOKEN_TYPE_DECLARATION:
 359                 break;
 360             case TGSI_TOKEN_TYPE_IMMEDIATE:
 361                 handle_immediate(ttr, &parser.FullToken.FullImmediate, imm_index);
 362                 imm_index++;
 363                 break;
 364             case TGSI_TOKEN_TYPE_INSTRUCTION:
 365                 inst = &parser.FullToken.FullInstruction;
 366                 /* This hack with the RET opcode woudn't work with
 367                  * conditionals. */
 368                 if (inst->Instruction.Opcode == TGSI_OPCODE_END ||
 369                     inst->Instruction.Opcode == TGSI_OPCODE_RET) {
 370                     break;
 371                 }
 372
 373                 transform_instruction(ttr, inst);
 374                 break;
 375         }
 376     }
 377
 378     tgsi_parse_free(&parser);
 379
 380     free(ttr->imms_to_swizzle);
 381
 382     rc_calculate_inputs_outputs(ttr->compiler);
 383 }