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 <stdio.h>
  24 #include "r300_tgsi_to_rc.h"
  25
  26 #include "compiler/radeon_compiler.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_LRP: return RC_OPCODE_LRP;
  54         case TGSI_OPCODE_FRC: return RC_OPCODE_FRC;
  55         case TGSI_OPCODE_FLR: return RC_OPCODE_FLR;
  56         case TGSI_OPCODE_ROUND: return RC_OPCODE_ROUND;
  57         case TGSI_OPCODE_EX2: return RC_OPCODE_EX2;
  58         case TGSI_OPCODE_LG2: return RC_OPCODE_LG2;
  59         case TGSI_OPCODE_POW: return RC_OPCODE_POW;
  60         case TGSI_OPCODE_XPD: return RC_OPCODE_XPD;
  61         case TGSI_OPCODE_COS: return RC_OPCODE_COS;
  62         case TGSI_OPCODE_DDX: return RC_OPCODE_DDX;
  63         case TGSI_OPCODE_DDY: return RC_OPCODE_DDY;
  64         case TGSI_OPCODE_KILL: return RC_OPCODE_KILP;
  65      /* case TGSI_OPCODE_PK2H: return RC_OPCODE_PK2H; */
  66      /* case TGSI_OPCODE_PK2US: return RC_OPCODE_PK2US; */
  67      /* case TGSI_OPCODE_PK4B: return RC_OPCODE_PK4B; */
  68      /* case TGSI_OPCODE_PK4UB: return RC_OPCODE_PK4UB; */
  69         case TGSI_OPCODE_SEQ: return RC_OPCODE_SEQ;
  70         case TGSI_OPCODE_SGT: return RC_OPCODE_SGT;
  71         case TGSI_OPCODE_SIN: return RC_OPCODE_SIN;
  72         case TGSI_OPCODE_SLE: return RC_OPCODE_SLE;
  73         case TGSI_OPCODE_SNE: return RC_OPCODE_SNE;
  74         case TGSI_OPCODE_TEX: return RC_OPCODE_TEX;
  75         case TGSI_OPCODE_TXD: return RC_OPCODE_TXD;
  76         case TGSI_OPCODE_TXP: return RC_OPCODE_TXP;
  77      /* case TGSI_OPCODE_UP2H: return RC_OPCODE_UP2H; */
  78      /* case TGSI_OPCODE_UP2US: return RC_OPCODE_UP2US; */
  79      /* case TGSI_OPCODE_UP4B: return RC_OPCODE_UP4B; */
  80      /* case TGSI_OPCODE_UP4UB: return RC_OPCODE_UP4UB; */
  81         case TGSI_OPCODE_ARR: return RC_OPCODE_ARR;
  82      /* case TGSI_OPCODE_CAL: return RC_OPCODE_CAL; */
  83      /* case TGSI_OPCODE_RET: return RC_OPCODE_RET; */
  84         case TGSI_OPCODE_SSG: return RC_OPCODE_SSG;
  85         case TGSI_OPCODE_CMP: return RC_OPCODE_CMP;
  86         case TGSI_OPCODE_SCS: return RC_OPCODE_SCS;
  87         case TGSI_OPCODE_TXB: return RC_OPCODE_TXB;
  88      /* case TGSI_OPCODE_DIV: return RC_OPCODE_DIV; */
  89         case TGSI_OPCODE_DP2: return RC_OPCODE_DP2;
  90         case TGSI_OPCODE_TXL: return RC_OPCODE_TXL;
  91         case TGSI_OPCODE_BRK: return RC_OPCODE_BRK;
  92         case TGSI_OPCODE_IF: return RC_OPCODE_IF;
  93         case TGSI_OPCODE_BGNLOOP: return RC_OPCODE_BGNLOOP;
  94         case TGSI_OPCODE_ELSE: return RC_OPCODE_ELSE;
  95         case TGSI_OPCODE_ENDIF: return RC_OPCODE_ENDIF;
  96         case TGSI_OPCODE_ENDLOOP: return RC_OPCODE_ENDLOOP;
  97      /* case TGSI_OPCODE_PUSHA: return RC_OPCODE_PUSHA; */
  98      /* case TGSI_OPCODE_POPA: return RC_OPCODE_POPA; */
  99         case TGSI_OPCODE_CEIL: return RC_OPCODE_CEIL;
 100      /* case TGSI_OPCODE_I2F: return RC_OPCODE_I2F; */
 101      /* case TGSI_OPCODE_NOT: return RC_OPCODE_NOT; */
 102         case TGSI_OPCODE_TRUNC: return RC_OPCODE_TRUNC;
 103      /* case TGSI_OPCODE_SHL: return RC_OPCODE_SHL; */
 104      /* case TGSI_OPCODE_ISHR: return RC_OPCODE_SHR; */
 105      /* case TGSI_OPCODE_AND: return RC_OPCODE_AND; */
 106      /* case TGSI_OPCODE_OR: return RC_OPCODE_OR; */
 107      /* case TGSI_OPCODE_MOD: return RC_OPCODE_MOD; */
 108      /* case TGSI_OPCODE_XOR: return RC_OPCODE_XOR; */
 109      /* case TGSI_OPCODE_TXF: return RC_OPCODE_TXF; */
 110      /* case TGSI_OPCODE_TXQ: return RC_OPCODE_TXQ; */
 111         case TGSI_OPCODE_CONT: return RC_OPCODE_CONT;
 112      /* case TGSI_OPCODE_EMIT: return RC_OPCODE_EMIT; */
 113      /* case TGSI_OPCODE_ENDPRIM: return RC_OPCODE_ENDPRIM; */
 114      /* case TGSI_OPCODE_BGNLOOP2: return RC_OPCODE_BGNLOOP2; */
 115      /* case TGSI_OPCODE_BGNSUB: return RC_OPCODE_BGNSUB; */
 116      /* case TGSI_OPCODE_ENDLOOP2: return RC_OPCODE_ENDLOOP2; */
 117      /* case TGSI_OPCODE_ENDSUB: return RC_OPCODE_ENDSUB; */
 118         case TGSI_OPCODE_NOP: return RC_OPCODE_NOP;
 119      /* case TGSI_OPCODE_BREAKC: return RC_OPCODE_BREAKC; */
 120         case TGSI_OPCODE_KILL_IF: return RC_OPCODE_KIL;
 121     }
 122
 123     fprintf(stderr, "r300: Unknown TGSI/RC opcode: %s\n", tgsi_get_opcode_name(opcode));
 124     return RC_OPCODE_ILLEGAL_OPCODE;
 125 }
 126
 127 static unsigned translate_saturate(unsigned saturate)
 128 {
 129     return saturate ? RC_SATURATE_ZERO_ONE : RC_SATURATE_NONE;
 130 }
 131
 132 static unsigned translate_register_file(unsigned file)
 133 {
 134     switch(file) {
 135         case TGSI_FILE_CONSTANT: return RC_FILE_CONSTANT;
 136         case TGSI_FILE_IMMEDIATE: return RC_FILE_CONSTANT;
 137         case TGSI_FILE_INPUT: return RC_FILE_INPUT;
 138         case TGSI_FILE_OUTPUT: return RC_FILE_OUTPUT;
 139         default:
 140             fprintf(stderr, "Unhandled register file: %i\n", file);
 141             /* fall-through */
 142         case TGSI_FILE_TEMPORARY: return RC_FILE_TEMPORARY;
 143         case TGSI_FILE_ADDRESS: return RC_FILE_ADDRESS;
 144     }
 145 }
 146
 147 static int translate_register_index(
 148     struct tgsi_to_rc * ttr,
 149     unsigned file,
 150     int index)
 151 {
 152     if (file == TGSI_FILE_IMMEDIATE)
 153         return ttr->immediate_offset + index;
 154
 155     return index;
 156 }
 157
 158 static void transform_dstreg(
 159     struct tgsi_to_rc * ttr,
 160     struct rc_dst_register * dst,
 161     struct tgsi_full_dst_register * src)
 162 {
 163     dst->File = translate_register_file(src->Register.File);
 164     dst->Index = translate_register_index(ttr, src->Register.File, src->Register.Index);
 165     dst->WriteMask = src->Register.WriteMask;
 166
 167     if (src->Register.Indirect) {
 168         ttr->error = TRUE;
 169         fprintf(stderr, "r300: Relative addressing of destination operands "
 170                 "is unsupported.\n");
 171     }
 172 }
 173
 174 static void transform_srcreg(
 175     struct tgsi_to_rc * ttr,
 176     struct rc_src_register * dst,
 177     struct tgsi_full_src_register * src)
 178 {
 179     unsigned i, j;
 180
 181     dst->File = translate_register_file(src->Register.File);
 182     dst->Index = translate_register_index(ttr, src->Register.File, src->Register.Index);
 183     dst->RelAddr = src->Register.Indirect;
 184     dst->Swizzle = tgsi_util_get_full_src_register_swizzle(src, 0);
 185     dst->Swizzle |= tgsi_util_get_full_src_register_swizzle(src, 1) << 3;
 186     dst->Swizzle |= tgsi_util_get_full_src_register_swizzle(src, 2) << 6;
 187     dst->Swizzle |= tgsi_util_get_full_src_register_swizzle(src, 3) << 9;
 188     dst->Abs = src->Register.Absolute;
 189     dst->Negate = src->Register.Negate ? RC_MASK_XYZW : 0;
 190
 191     if (src->Register.File == TGSI_FILE_IMMEDIATE) {
 192         for (i = 0; i < ttr->imms_to_swizzle_count; i++) {
 193             if (ttr->imms_to_swizzle[i].index == src->Register.Index) {
 194                 dst->File = RC_FILE_TEMPORARY;
 195                 dst->Index = 0;
 196                 dst->Swizzle = 0;
 197                 for (j = 0; j < 4; j++) {
 198                     dst->Swizzle |= GET_SWZ(ttr->imms_to_swizzle[i].swizzle,
 199                         tgsi_util_get_full_src_register_swizzle(src, j)) << (j * 3);
 200                 }
 201                 break;
 202             }
 203         }
 204     }
 205 }
 206
 207 static void transform_texture(struct rc_instruction * dst, struct tgsi_instruction_texture src,
 208                               uint32_t *shadowSamplers)
 209 {
 210     switch(src.Texture) {
 211         case TGSI_TEXTURE_1D:
 212             dst->U.I.TexSrcTarget = RC_TEXTURE_1D;
 213             break;
 214         case TGSI_TEXTURE_2D:
 215             dst->U.I.TexSrcTarget = RC_TEXTURE_2D;
 216             break;
 217         case TGSI_TEXTURE_3D:
 218             dst->U.I.TexSrcTarget = RC_TEXTURE_3D;
 219             break;
 220         case TGSI_TEXTURE_CUBE:
 221             dst->U.I.TexSrcTarget = RC_TEXTURE_CUBE;
 222             break;
 223         case TGSI_TEXTURE_RECT:
 224             dst->U.I.TexSrcTarget = RC_TEXTURE_RECT;
 225             break;
 226         case TGSI_TEXTURE_SHADOW1D:
 227             dst->U.I.TexSrcTarget = RC_TEXTURE_1D;
 228             dst->U.I.TexShadow = 1;
 229             *shadowSamplers |= 1 << dst->U.I.TexSrcUnit;
 230             break;
 231         case TGSI_TEXTURE_SHADOW2D:
 232             dst->U.I.TexSrcTarget = RC_TEXTURE_2D;
 233             dst->U.I.TexShadow = 1;
 234             *shadowSamplers |= 1 << dst->U.I.TexSrcUnit;
 235             break;
 236         case TGSI_TEXTURE_SHADOWRECT:
 237             dst->U.I.TexSrcTarget = RC_TEXTURE_RECT;
 238             dst->U.I.TexShadow = 1;
 239             *shadowSamplers |= 1 << dst->U.I.TexSrcUnit;
 240             break;
 241     }
 242     dst->U.I.TexSwizzle = RC_SWIZZLE_XYZW;
 243 }
 244
 245 static void transform_instruction(struct tgsi_to_rc * ttr, struct tgsi_full_instruction * src)
 246 {
 247     struct rc_instruction * dst;
 248     int i;
 249
 250     dst = rc_insert_new_instruction(ttr->compiler, ttr->compiler->Program.Instructions.Prev);
 251     dst->U.I.Opcode = translate_opcode(src->Instruction.Opcode);
 252     dst->U.I.SaturateMode = translate_saturate(src->Instruction.Saturate);
 253
 254     if (src->Instruction.NumDstRegs)
 255         transform_dstreg(ttr, &dst->U.I.DstReg, &src->Dst[0]);
 256
 257     for(i = 0; i < src->Instruction.NumSrcRegs; ++i) {
 258         if (src->Src[i].Register.File == TGSI_FILE_SAMPLER)
 259             dst->U.I.TexSrcUnit = src->Src[i].Register.Index;
 260         else
 261             transform_srcreg(ttr, &dst->U.I.SrcReg[i], &src->Src[i]);
 262     }
 263
 264     /* Texturing. */
 265     if (src->Instruction.Texture)
 266         transform_texture(dst, src->Texture,
 267                           &ttr->compiler->Program.ShadowSamplers);
 268 }
 269
 270 static void handle_immediate(struct tgsi_to_rc * ttr,
 271                              struct tgsi_full_immediate * imm,
 272                              unsigned index)
 273 {
 274     struct rc_constant constant;
 275     unsigned swizzle = 0;
 276     boolean can_swizzle = TRUE;
 277     unsigned i;
 278
 279     for (i = 0; i < 4; i++) {
 280         if (imm->u[i].Float == 0.0f) {
 281             swizzle |= RC_SWIZZLE_ZERO << (i * 3);
 282         } else if (imm->u[i].Float == 0.5f && ttr->use_half_swizzles) {
 283             swizzle |= RC_SWIZZLE_HALF << (i * 3);
 284         } else if (imm->u[i].Float == 1.0f) {
 285             swizzle |= RC_SWIZZLE_ONE << (i * 3);
 286         } else {
 287             can_swizzle = FALSE;
 288             break;
 289         }
 290     }
 291
 292     if (can_swizzle) {
 293         ttr->imms_to_swizzle[ttr->imms_to_swizzle_count].index = index;
 294         ttr->imms_to_swizzle[ttr->imms_to_swizzle_count].swizzle = swizzle;
 295         ttr->imms_to_swizzle_count++;
 296     } else {
 297         constant.Type = RC_CONSTANT_IMMEDIATE;
 298         constant.Size = 4;
 299         for(i = 0; i < 4; ++i)
 300             constant.u.Immediate[i] = imm->u[i].Float;
 301         rc_constants_add(&ttr->compiler->Program.Constants, &constant);
 302     }
 303 }
 304
 305 void r300_tgsi_to_rc(struct tgsi_to_rc * ttr,
 306                      const struct tgsi_token * tokens)
 307 {
 308     struct tgsi_full_instruction *inst;
 309     struct tgsi_parse_context parser;
 310     unsigned imm_index = 0;
 311     int i;
 312
 313     ttr->error = FALSE;
 314
 315     /* Allocate constants placeholders.
 316      *
 317      * Note: What if declared constants are not contiguous? */
 318     for(i = 0; i <= ttr->info->file_max[TGSI_FILE_CONSTANT]; ++i) {
 319         struct rc_constant constant;
 320         memset(&constant, 0, sizeof(constant));
 321         constant.Type = RC_CONSTANT_EXTERNAL;
 322         constant.Size = 4;
 323         constant.u.External = i;
 324         rc_constants_add(&ttr->compiler->Program.Constants, &constant);
 325     }
 326
 327     ttr->immediate_offset = ttr->compiler->Program.Constants.Count;
 328
 329     ttr->imms_to_swizzle = malloc(ttr->info->immediate_count * sizeof(struct swizzled_imms));
 330     ttr->imms_to_swizzle_count = 0;
 331
 332     tgsi_parse_init(&parser, tokens);
 333
 334     while (!tgsi_parse_end_of_tokens(&parser)) {
 335         tgsi_parse_token(&parser);
 336
 337         switch (parser.FullToken.Token.Type) {
 338             case TGSI_TOKEN_TYPE_DECLARATION:
 339                 break;
 340             case TGSI_TOKEN_TYPE_IMMEDIATE:
 341                 handle_immediate(ttr, &parser.FullToken.FullImmediate, imm_index);
 342                 imm_index++;
 343                 break;
 344             case TGSI_TOKEN_TYPE_INSTRUCTION:
 345                 inst = &parser.FullToken.FullInstruction;
 346                 if (inst->Instruction.Opcode == TGSI_OPCODE_END) {
 347                     break;
 348                 }
 349
 350                 transform_instruction(ttr, inst);
 351                 break;
 352         }
 353     }
 354
 355     tgsi_parse_free(&parser);
 356
 357     free(ttr->imms_to_swizzle);
 358
 359     rc_calculate_inputs_outputs(ttr->compiler);
 360 }