src/mesa/shader/slang/slang_assemble_constructor.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5
   4  *
   5  * Copyright (C) 2005-2006  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file slang_assemble_constructor.c
  27  * slang constructor and vector swizzle assembler
  28  * \author Michal Krol
  29  */
  30
  31 #include "imports.h"
  32 #include "slang_utility.h"
  33 #include "slang_assemble_constructor.h"
  34 #include "slang_assemble_typeinfo.h"
  35 #include "slang_storage.h"
  36
  37 /* _slang_is_swizzle() */
  38
  39 int _slang_is_swizzle (const char *field, unsigned int rows, slang_swizzle *swz)
  40 {
  41         unsigned int i;
  42         int xyzw = 0, rgba = 0, stpq = 0;
  43
  44         /* the swizzle can be at most 4-component long */
  45         swz->num_components = slang_string_length (field);
  46         if (swz->num_components > 4)
  47                 return 0;
  48
  49         for (i = 0; i < swz->num_components; i++)
  50         {
  51                 /* mark which swizzle group is used */
  52                 switch (field[i])
  53                 {
  54                 case 'x':
  55                 case 'y':
  56                 case 'z':
  57                 case 'w':
  58                         xyzw = 1;
  59                         break;
  60                 case 'r':
  61                 case 'g':
  62                 case 'b':
  63                 case 'a':
  64                         rgba = 1;
  65                         break;
  66                 case 's':
  67                 case 't':
  68                 case 'p':
  69                 case 'q':
  70                         stpq = 1;
  71                         break;
  72                 default:
  73                         return 0;
  74                 }
  75
  76                 /* collect swizzle component */
  77                 switch (field[i])
  78                 {
  79                 case 'x':
  80                 case 'r':
  81                 case 's':
  82                         swz->swizzle[i] = 0;
  83                         break;
  84                 case 'y':
  85                 case 'g':
  86                 case 't':
  87                         swz->swizzle[i] = 1;
  88                         break;
  89                 case 'z':
  90                 case 'b':
  91                 case 'p':
  92                         swz->swizzle[i] = 2;
  93                         break;
  94                 case 'w':
  95                 case 'a':
  96                 case 'q':
  97                         swz->swizzle[i] = 3;
  98                         break;
  99                 }
 100
 101                 /* check if the component is valid for given vector's row count */
 102                 if (rows <= swz->swizzle[i])
 103                         return 0;
 104         }
 105
 106         /* only one swizzle group can be used */
 107         if ((xyzw && rgba) || (xyzw && stpq) || (rgba && stpq))
 108                 return 0;
 109
 110         return 1;
 111 }
 112
 113 /* _slang_is_swizzle_mask() */
 114
 115 int _slang_is_swizzle_mask (const slang_swizzle *swz, unsigned int rows)
 116 {
 117         unsigned int i, c = 0;
 118
 119         /* the swizzle may not be longer than the vector dim */
 120         if (swz->num_components > rows)
 121                 return 0;
 122
 123         /* the swizzle components cannot be duplicated */
 124         for (i = 0; i < swz->num_components; i++)
 125         {
 126                 if ((c & (1 << swz->swizzle[i])) != 0)
 127                         return 0;
 128                 c |= 1 << swz->swizzle[i];
 129         }
 130         return 1;
 131 }
 132
 133 /* _slang_multiply_swizzles() */
 134
 135 void _slang_multiply_swizzles (slang_swizzle *dst, const slang_swizzle *left,
 136         const slang_swizzle *right)
 137 {
 138         unsigned int i;
 139
 140         dst->num_components = right->num_components;
 141         for (i = 0; i < right->num_components; i++)
 142                 dst->swizzle[i] = left->swizzle[right->swizzle[i]];
 143 }
 144
 145 /* _slang_assemble_constructor() */
 146 #if 0
 147 static int constructor_aggregate (slang_assembly_file *file, const slang_storage_aggregate *flat,
 148         unsigned int *index, slang_operation *op, unsigned int size, slang_assembly_flow_control *flow,
 149         slang_assembly_name_space *space, slang_assembly_local_info *info)
 150 {
 151         slang_assembly_typeinfo ti;
 152         int result;
 153         slang_storage_aggregate agg, flat_agg;
 154         slang_assembly_stack_info stk;
 155         unsigned int i;
 156
 157         slang_assembly_typeinfo_construct (&ti);
 158         if (!(result = _slang_typeof_operation (op, space, &ti)))
 159                 goto end1;
 160
 161         slang_storage_aggregate_construct (&agg);
 162         if (!(result = _slang_aggregate_variable (&agg, &ti.spec, NULL, space->funcs, space->structs,
 163                         space->vars)))
 164                 goto end2;
 165
 166         slang_storage_aggregate_construct (&flat_agg);
 167         if (!(result = _slang_flatten_aggregate (&flat_agg, &agg)))
 168                 goto end;
 169
 170         if (!(result = _slang_assemble_operation (file, op, 0, flow, space, info, &stk)))
 171                 goto end;
 172
 173         for (i = 0; i < flat_agg.count; i++)
 174         {
 175                 const slang_storage_array *arr1 = flat_agg.arrays + i;
 176                 const slang_storage_array *arr2 = flat->arrays + *index;
 177
 178                 if (arr1->type != arr2->type)
 179                 {
 180                         /* TODO: convert (generic) from arr1 to arr2 */
 181                 }
 182                 (*index)++;
 183                 /* TODO: watch the index, if it reaches the size, pop off the stack subsequent values */
 184         }
 185
 186         result = 1;
 187 end:
 188         slang_storage_aggregate_destruct (&flat_agg);
 189 end2:
 190         slang_storage_aggregate_destruct (&agg);
 191 end1:
 192         slang_assembly_typeinfo_destruct (&ti);
 193         return result;
 194 }
 195 #endif
 196
 197 /* XXX: general swizzle! */
 198
 199 #if 0
 200 int _slang_assemble_constructor (slang_assembly_file *file, slang_operation *op,
 201         slang_assembly_flow_control *flow, slang_assembly_name_space *space,
 202         slang_assembly_local_info *info, struct slang_machine_ *pmach)
 203 {
 204         slang_assembly_typeinfo ti;
 205         int result;
 206         slang_storage_aggregate agg, flat;
 207         unsigned int size, index, i;
 208
 209         if (!slang_assembly_typeinfo_construct (&ti))
 210                 return 0;
 211         if (!(result = _slang_typeof_operation (op, space, &ti)))
 212                 goto end1;
 213
 214         if (!(result = slang_storage_aggregate_construct (&agg)))
 215                 goto end1;
 216         if (!(result = _slang_aggregate_variable (&agg, &ti.spec, NULL, space->funcs, space->structs,
 217                         space->vars, pmach, file)))
 218                 goto end2;
 219
 220         size = _slang_sizeof_aggregate (&agg);
 221
 222         if (!(result = slang_storage_aggregate_construct (&flat)))
 223                 goto end2;
 224         if (!(result = _slang_flatten_aggregate (&flat, &agg)))
 225                 goto end;
 226
 227         index = 0;
 228         for (i = 0; i < op->num_children; i++)
 229         {
 230                 if (!(result = constructor_aggregate (file, &flat, &index, op->children + i, size, flow,
 231                         space, info)))
 232                         goto end;
 233                 /* TODO: watch the index, if it reaches the size, raise an error */
 234         }
 235
 236         result = 1;
 237 end:
 238         slang_storage_aggregate_destruct (&flat);
 239 end2:
 240         slang_storage_aggregate_destruct (&agg);
 241 end1:
 242         slang_assembly_typeinfo_destruct (&ti);
 243         return result;
 244 }
 245 #endif
 246
 247 /* _slang_assemble_constructor_from_swizzle() */
 248
 249 int _slang_assemble_constructor_from_swizzle (slang_assembly_file *file, const slang_swizzle *swz,
 250         slang_type_specifier *spec, slang_type_specifier *master_spec, slang_assembly_local_info *info)
 251 {
 252         unsigned int master_rows, i;
 253
 254         master_rows = _slang_type_dim (master_spec->type);
 255         for (i = 0; i < master_rows; i++)
 256         {
 257                 switch (_slang_type_base (master_spec->type))
 258                 {
 259                 case slang_spec_bool:
 260                         if (!slang_assembly_file_push_label2 (file, slang_asm_bool_copy,
 261                                         (master_rows - i) * 4, i * 4))
 262                                 return 0;
 263                         break;
 264                 case slang_spec_int:
 265                         if (!slang_assembly_file_push_label2 (file, slang_asm_int_copy,
 266                                         (master_rows - i) * 4, i * 4))
 267                                 return 0;
 268                         break;
 269                 case slang_spec_float:
 270                         if (!slang_assembly_file_push_label2 (file, slang_asm_float_copy,
 271                                         (master_rows - i) * 4, i * 4))
 272                                 return 0;
 273                         break;
 274                 default:
 275                         break;
 276                 }
 277         }
 278         if (!slang_assembly_file_push_label (file, slang_asm_local_free, 4))
 279                 return 0;
 280         for (i = swz->num_components; i > 0; i--)
 281         {
 282                 unsigned int n = i - 1;
 283
 284                 if (!slang_assembly_file_push_label2 (file, slang_asm_local_addr, info->swizzle_tmp, 16))
 285                         return 0;
 286                 if (!slang_assembly_file_push_label (file, slang_asm_addr_push, swz->swizzle[n] * 4))
 287                         return 0;
 288                 if (!slang_assembly_file_push (file, slang_asm_addr_add))
 289                         return 0;
 290                 switch (_slang_type_base (master_spec->type))
 291                 {
 292                 case slang_spec_bool:
 293                         if (!slang_assembly_file_push (file, slang_asm_bool_deref))
 294                                 return 0;
 295                         break;
 296                 case slang_spec_int:
 297                         if (!slang_assembly_file_push (file, slang_asm_int_deref))
 298                                 return 0;
 299                         break;
 300                 case slang_spec_float:
 301                         if (!slang_assembly_file_push (file, slang_asm_float_deref))
 302                                 return 0;
 303                         break;
 304                 default:
 305                         break;
 306                 }
 307         }
 308         return 1;
 309 }
 310