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   1 /*
   2  * Direct3D shader assembler
   3  *
   4  * Copyright 2008 Stefan Dösinger
   5  * Copyright 2009 Matteo Bruni
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 %{
  23 #include "config.h"
  24 #include "wine/port.h"
  25 #include "wine/debug.h"
  26
  27 #include "d3dx9_36_private.h"
  28
  29 #include <stdio.h>
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(asmshader);
  32
  33 struct asm_parser asm_ctx;
  34
  35 /* Needed lexer functions declarations */
  36 void asmshader_error(const char *s);
  37 int asmshader_lex(void);
  38
  39 void set_rel_reg(struct shader_reg *reg, struct rel_reg *rel) {
  40     reg->rel_reg = NULL;
  41 }
  42
  43 %}
  44
  45 %union {
  46     unsigned int        regnum;
  47     struct shader_reg   reg;
  48     struct {
  49         DWORD           swizzle;
  50         DWORD           writemask;
  51     } swizzle_wmask;
  52     DWORD               writemask;
  53     DWORD               swizzle;
  54     struct {
  55         DWORD           mod;
  56         DWORD           shift;
  57     } modshift;
  58     struct rel_reg      rel_reg;
  59     struct src_regs     sregs;
  60 }
  61
  62 /* Common instructions between vertex and pixel shaders */
  63 %token INSTR_MOV
  64
  65 /* Registers */
  66 %token <regnum> REG_TEMP
  67 %token <regnum> REG_CONSTFLOAT
  68
  69 /* Version tokens */
  70 %token VER_VS10
  71 %token VER_VS11
  72 %token VER_VS20
  73 %token VER_VS2X
  74 %token VER_VS30
  75
  76 %token VER_PS10
  77 %token VER_PS11
  78 %token VER_PS12
  79 %token VER_PS13
  80 %token VER_PS14
  81 %token VER_PS20
  82 %token VER_PS2X
  83 %token VER_PS30
  84
  85
  86 %type <reg> dreg_name
  87 %type <reg> dreg
  88 %type <reg> sreg_name
  89 %type <reg> sreg
  90 %type <swizzle> swizzle
  91 %type <modshift> omods
  92 %type <rel_reg> rel_reg
  93 %type <sregs> sregs
  94
  95 %%
  96
  97 shader:               version_marker instructions
  98                         {
  99                             asm_ctx.funcs->end(&asm_ctx);
 100                         }
 101
 102 version_marker:       VER_VS10
 103                         {
 104                             TRACE("Vertex shader 1.0\n");
 105                             set_parse_status(&asm_ctx, PARSE_ERR);
 106                             YYABORT;
 107                         }
 108                     | VER_VS11
 109                         {
 110                             TRACE("Vertex shader 1.1\n");
 111                             set_parse_status(&asm_ctx, PARSE_ERR);
 112                             YYABORT;
 113                         }
 114                     | VER_VS20
 115                         {
 116                             TRACE("Vertex shader 2.0\n");
 117                             set_parse_status(&asm_ctx, PARSE_ERR);
 118                             YYABORT;
 119                         }
 120                     | VER_VS2X
 121                         {
 122                             TRACE("Vertex shader 2.x\n");
 123                             set_parse_status(&asm_ctx, PARSE_ERR);
 124                             YYABORT;
 125                         }
 126                     | VER_VS30
 127                         {
 128                             TRACE("Vertex shader 3.0\n");
 129                             create_vs30_parser(&asm_ctx);
 130                         }
 131                     | VER_PS10
 132                         {
 133                             TRACE("Pixel  shader 1.0\n");
 134                             set_parse_status(&asm_ctx, PARSE_ERR);
 135                             YYABORT;
 136                         }
 137                     | VER_PS11
 138                         {
 139                             TRACE("Pixel  shader 1.1\n");
 140                             set_parse_status(&asm_ctx, PARSE_ERR);
 141                             YYABORT;
 142                         }
 143                     | VER_PS12
 144                         {
 145                             TRACE("Pixel  shader 1.2\n");
 146                             set_parse_status(&asm_ctx, PARSE_ERR);
 147                             YYABORT;
 148                         }
 149                     | VER_PS13
 150                         {
 151                             TRACE("Pixel  shader 1.3\n");
 152                             set_parse_status(&asm_ctx, PARSE_ERR);
 153                             YYABORT;
 154                         }
 155                     | VER_PS14
 156                         {
 157                             TRACE("Pixel  shader 1.4\n");
 158                             set_parse_status(&asm_ctx, PARSE_ERR);
 159                             YYABORT;
 160                         }
 161                     | VER_PS20
 162                         {
 163                             TRACE("Pixel  shader 2.0\n");
 164                             set_parse_status(&asm_ctx, PARSE_ERR);
 165                             YYABORT;
 166                         }
 167                     | VER_PS2X
 168                         {
 169                             TRACE("Pixel  shader 2.x\n");
 170                             set_parse_status(&asm_ctx, PARSE_ERR);
 171                             YYABORT;
 172                         }
 173                     | VER_PS30
 174                         {
 175                             TRACE("Pixel  shader 3.0\n");
 176                             set_parse_status(&asm_ctx, PARSE_ERR);
 177                             YYABORT;
 178                         }
 179
 180 instructions:         /* empty */
 181                     | instructions complexinstr
 182                             {
 183                                 /* Nothing to do */
 184                             }
 185
 186 complexinstr:         instruction
 187                             {
 188
 189                             }
 190
 191 instruction:          INSTR_MOV omods dreg ',' sregs
 192                             {
 193                                 TRACE("MOV\n");
 194                                 asm_ctx.funcs->instr(&asm_ctx, BWRITERSIO_MOV, $2.mod, $2.shift, 0, &$3, &$5, 1);
 195                             }
 196
 197 dreg:                 dreg_name rel_reg
 198                             {
 199                                 $$.regnum = $1.regnum;
 200                                 $$.type = $1.type;
 201                                 $$.writemask = BWRITERSP_WRITEMASK_ALL;
 202                                 $$.srcmod = BWRITERSPSM_NONE;
 203                                 set_rel_reg(&$$, &$2);
 204                             }
 205
 206 dreg_name:            REG_TEMP
 207                         {
 208                             $$.regnum = $1; $$.type = BWRITERSPR_TEMP;
 209                         }
 210
 211 swizzle:              /* empty */
 212                         {
 213                             $$ = BWRITERVS_NOSWIZZLE;
 214                             TRACE("Default swizzle: %08x\n", $$);
 215                         }
 216
 217 omods:                 /* Empty */
 218                         {
 219                             $$.mod = 0;
 220                             $$.shift = 0;
 221                         }
 222
 223 sregs:                sreg
 224                         {
 225                             $$.reg[0] = $1;
 226                             $$.count = 1;
 227                         }
 228                     | sregs ',' sreg
 229                         {
 230                             if($$.count == MAX_SRC_REGS){
 231                                 asmparser_message(&asm_ctx, "Line %u: Too many source registers in this instruction\n",
 232                                                   asm_ctx.line_no);
 233                                 set_parse_status(&asm_ctx, PARSE_ERR);
 234                             }
 235                             else
 236                                 $$.reg[$$.count++] = $3;
 237                         }
 238
 239 sreg:                   sreg_name rel_reg swizzle
 240                         {
 241                             $$.type = $1.type;
 242                             $$.regnum = $1.regnum;
 243                             $$.swizzle = $3;
 244                             $$.srcmod = BWRITERSPSM_NONE;
 245                             set_rel_reg(&$$, &$2);
 246                         }
 247
 248 rel_reg:               /* empty */
 249                         {
 250                             $$.has_rel_reg = FALSE;
 251                             $$.additional_offset = 0;
 252                         }
 253
 254 sreg_name:            REG_TEMP
 255                         {
 256                             $$.regnum = $1; $$.type = BWRITERSPR_TEMP;
 257                         }
 258                     | REG_CONSTFLOAT
 259                         {
 260                             $$.regnum = $1; $$.type = BWRITERSPR_CONST;
 261                         }
 262
 263 %%
 264
 265 void asmshader_error (char const *s) {
 266     asmparser_message(&asm_ctx, "Line %u: Error \"%s\" from bison\n", asm_ctx.line_no, s);
 267     set_parse_status(&asm_ctx, PARSE_ERR);
 268 }
 269
 270 /* Error reporting function */
 271 void asmparser_message(struct asm_parser *ctx, const char *fmt, ...) {
 272     va_list args;
 273     char* newbuffer;
 274     int rc, newsize;
 275
 276     if(ctx->messagecapacity == 0) {
 277         ctx->messages = asm_alloc(MESSAGEBUFFER_INITIAL_SIZE);
 278         if(ctx->messages == NULL) {
 279             ERR("Error allocating memory for parser messages\n");
 280             return;
 281         }
 282         ctx->messagecapacity = MESSAGEBUFFER_INITIAL_SIZE;
 283     }
 284
 285     while(1) {
 286         va_start(args, fmt);
 287         rc = vsnprintf(ctx->messages + ctx->messagesize,
 288                        ctx->messagecapacity - ctx->messagesize, fmt, args);
 289         va_end(args);
 290
 291         if (rc < 0 ||                                           /* C89 */
 292             rc >= ctx->messagecapacity - ctx->messagesize) {    /* C99 */
 293             /* Resize the buffer */
 294             newsize = ctx->messagecapacity * 2;
 295             newbuffer = asm_realloc(ctx->messages, newsize);
 296             if(newbuffer == NULL){
 297                 ERR("Error reallocating memory for parser messages\n");
 298                 return;
 299             }
 300             ctx->messages = newbuffer;
 301             ctx->messagecapacity = newsize;
 302         } else {
 303             ctx->messagesize += rc;
 304             return;
 305         }
 306     }
 307 }
 308
 309 /* New status is the worst between current status and parameter value */
 310 void set_parse_status(struct asm_parser *ctx, enum parse_status status) {
 311     if(status == PARSE_ERR) ctx->status = PARSE_ERR;
 312     else if(status == PARSE_WARN && ctx->status == PARSE_SUCCESS) ctx->status = PARSE_WARN;
 313 }
 314
 315 struct bwriter_shader *parse_asm_shader(char **messages) {
 316     struct bwriter_shader *ret = NULL;
 317
 318     asm_ctx.shader = NULL;
 319     asm_ctx.status = PARSE_SUCCESS;
 320     asm_ctx.messagesize = asm_ctx.messagecapacity = 0;
 321     asm_ctx.line_no = 1;
 322
 323     asmshader_parse();
 324
 325     if(asm_ctx.status != PARSE_ERR) ret = asm_ctx.shader;
 326     else if(asm_ctx.shader) SlDeleteShader(asm_ctx.shader);
 327
 328     if(messages) {
 329         if(asm_ctx.messagesize) {
 330             /* Shrink the buffer to the used size */
 331             *messages = asm_realloc(asm_ctx.messages, asm_ctx.messagesize + 1);
 332             if(!*messages) {
 333                 ERR("Out of memory, no messages reported\n");
 334                 asm_free(asm_ctx.messages);
 335             }
 336         } else {
 337             *messages = NULL;
 338         }
 339     } else {
 340         if(asm_ctx.messagecapacity) asm_free(asm_ctx.messages);
 341     }
 342
 343     return ret;
 344 }