src/gallium/drivers/svga/svga_tgsi_decl_sm20.c

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26
  27 #include "pipe/p_shader_tokens.h"
  28 #include "tgsi/tgsi_parse.h"
  29 #include "util/u_memory.h"
  30
  31 #include "svga_tgsi_emit.h"
  32 #include "svga_context.h"
  33
  34
  35
  36
  37 static boolean ps20_input( struct svga_shader_emitter *emit,
  38                            struct tgsi_declaration_semantic semantic,
  39                            unsigned idx )
  40 {
  41    struct src_register reg;
  42    SVGA3DOpDclArgs dcl;
  43    SVGA3dShaderInstToken opcode;
  44
  45    opcode = inst_token( SVGA3DOP_DCL );
  46    dcl.values[0] = 0;
  47    dcl.values[1] = 0;
  48
  49    switch (semantic.Name) {
  50    case TGSI_SEMANTIC_POSITION:
  51       /* Special case:
  52        */
  53       reg = src_register( SVGA3DREG_MISCTYPE,
  54                           SVGA3DMISCREG_POSITION );
  55       break;
  56    case TGSI_SEMANTIC_COLOR:
  57       reg = src_register( SVGA3DREG_INPUT,
  58                           semantic.Index );
  59       break;
  60    case TGSI_SEMANTIC_FOG:
  61       assert(semantic.Index == 0);
  62       reg = src_register( SVGA3DREG_TEXTURE, 0 );
  63       break;
  64    case TGSI_SEMANTIC_GENERIC:
  65       reg = src_register( SVGA3DREG_TEXTURE,
  66                           semantic.Index + 1 );
  67       break;
  68    default:
  69       assert(0);
  70       return TRUE;
  71    }
  72
  73    emit->input_map[idx] = reg;
  74
  75    dcl.dst = dst( reg );
  76
  77    dcl.usage = 0;
  78    dcl.index = 0;
  79
  80    dcl.values[0] |= 1<<31;
  81
  82    return  (emit_instruction(emit, opcode) &&
  83             svga_shader_emit_dwords( emit, dcl.values, Elements(dcl.values)));
  84 }
  85
  86
  87 static boolean ps20_output( struct svga_shader_emitter *emit,
  88                             struct tgsi_declaration_semantic semantic,
  89                             unsigned idx )
  90 {
  91    SVGA3dShaderDestToken reg;
  92
  93    switch (semantic.Name) {
  94    case TGSI_SEMANTIC_COLOR:
  95       if (semantic.Index < PIPE_MAX_COLOR_BUFS) {
  96          unsigned cbuf = semantic.Index;
  97
  98          emit->output_map[idx] = dst_register( SVGA3DREG_TEMP,
  99                                                emit->nr_hw_temp++ );
 100          emit->temp_col[cbuf] = emit->output_map[idx];
 101          emit->true_col[cbuf] = dst_register( SVGA3DREG_COLOROUT,
 102                                               semantic.Index );
 103       }
 104       else {
 105          assert(0);
 106          reg = dst_register( SVGA3DREG_COLOROUT, 0 );
 107       }
 108       break;
 109    case TGSI_SEMANTIC_POSITION:
 110       emit->output_map[idx] = dst_register( SVGA3DREG_TEMP,
 111                                             emit->nr_hw_temp++ );
 112       emit->temp_pos = emit->output_map[idx];
 113       emit->true_pos = dst_register( SVGA3DREG_DEPTHOUT,
 114                                      semantic.Index );
 115       break;
 116    default:
 117       assert(0);
 118       reg = dst_register( SVGA3DREG_COLOROUT, 0 );
 119       break;
 120    }
 121
 122    return TRUE;
 123 }
 124
 125
 126 static boolean vs20_input( struct svga_shader_emitter *emit,
 127                            struct tgsi_declaration_semantic semantic,
 128                            unsigned idx )
 129 {
 130    SVGA3DOpDclArgs dcl;
 131    SVGA3dShaderInstToken opcode;
 132
 133    opcode = inst_token( SVGA3DOP_DCL );
 134    dcl.values[0] = 0;
 135    dcl.values[1] = 0;
 136
 137    emit->input_map[idx] = src_register( SVGA3DREG_INPUT, idx );
 138    dcl.dst = dst_register( SVGA3DREG_INPUT, idx );
 139
 140    assert(dcl.dst.reserved0);
 141
 142    /* Mesa doesn't provide use with VS input semantics (they're
 143     * actually pretty meaningless), so we just generate some plausible
 144     * ones here.  This has to match what we declare in the vdecl code
 145     * in svga_pipe_vertex.c.
 146     */
 147    if (idx == 0) {
 148       dcl.usage = SVGA3D_DECLUSAGE_POSITION;
 149       dcl.index = 0;
 150    }
 151    else {
 152       dcl.usage = SVGA3D_DECLUSAGE_TEXCOORD;
 153       dcl.index = idx - 1;
 154    }
 155
 156    dcl.values[0] |= 1<<31;
 157
 158    return  (emit_instruction(emit, opcode) &&
 159             svga_shader_emit_dwords( emit, dcl.values, Elements(dcl.values)));
 160 }
 161
 162
 163 static boolean vs20_output( struct svga_shader_emitter *emit,
 164                          struct tgsi_declaration_semantic semantic,
 165                          unsigned idx )
 166 {
 167    /* Don't emit dcl instruction for vs20 inputs
 168     */
 169
 170    /* Just build the register map table:
 171     */
 172    switch (semantic.Name) {
 173    case TGSI_SEMANTIC_POSITION:
 174       assert(semantic.Index == 0);
 175       emit->output_map[idx] = dst_register( SVGA3DREG_TEMP,
 176                                             emit->nr_hw_temp++ );
 177       emit->temp_pos = emit->output_map[idx];
 178       emit->true_pos = dst_register( SVGA3DREG_RASTOUT,
 179                                      SVGA3DRASTOUT_POSITION);
 180       break;
 181    case TGSI_SEMANTIC_PSIZE:
 182       assert(semantic.Index == 0);
 183       emit->output_map[idx] = dst_register( SVGA3DREG_TEMP,
 184                                             emit->nr_hw_temp++ );
 185       emit->temp_psiz = emit->output_map[idx];
 186       emit->true_psiz = dst_register( SVGA3DREG_RASTOUT,
 187                                       SVGA3DRASTOUT_PSIZE );
 188       break;
 189    case TGSI_SEMANTIC_FOG:
 190       assert(semantic.Index == 0);
 191       emit->output_map[idx] = dst_register( SVGA3DREG_TEXCRDOUT, 0 );
 192       break;
 193    case TGSI_SEMANTIC_COLOR:
 194       /* oD0 */
 195       emit->output_map[idx] = dst_register( SVGA3DREG_ATTROUT,
 196                                             semantic.Index );
 197       break;
 198    case TGSI_SEMANTIC_GENERIC:
 199       emit->output_map[idx] = dst_register( SVGA3DREG_TEXCRDOUT,
 200                                             semantic.Index + 1 );
 201       break;
 202    default:
 203       assert(0);
 204       emit->output_map[idx] = dst_register(  SVGA3DREG_TEMP, 0 );
 205       return FALSE;
 206    }
 207
 208    return TRUE;
 209 }
 210
 211 static boolean ps20_sampler( struct svga_shader_emitter *emit,
 212                           struct tgsi_declaration_semantic semantic,
 213                           unsigned idx )
 214 {
 215    SVGA3DOpDclArgs dcl;
 216    SVGA3dShaderInstToken opcode;
 217
 218    opcode = inst_token( SVGA3DOP_DCL );
 219    dcl.values[0] = 0;
 220    dcl.values[1] = 0;
 221
 222    dcl.dst = dst_register( SVGA3DREG_SAMPLER, idx );
 223    dcl.type = svga_tgsi_sampler_type( emit, idx );
 224
 225    return  (emit_instruction(emit, opcode) &&
 226             svga_shader_emit_dwords( emit, dcl.values, Elements(dcl.values)));
 227 }
 228
 229
 230 boolean svga_translate_decl_sm20( struct svga_shader_emitter *emit,
 231                              const struct tgsi_full_declaration *decl )
 232 {
 233    unsigned first = decl->DeclarationRange.First;
 234    unsigned last = decl->DeclarationRange.Last;
 235    unsigned semantic = 0;
 236    unsigned semantic_idx = 0;
 237    unsigned idx;
 238
 239    if (decl->Declaration.Semantic) {
 240       semantic = decl->Semantic.Name;
 241       semantic_idx = decl->Semantic.Index;
 242    }
 243
 244    for( idx = first; idx <= last; idx++ ) {
 245       boolean ok;
 246
 247       switch (decl->Declaration.File) {
 248       case TGSI_FILE_SAMPLER:
 249          assert (emit->unit == PIPE_SHADER_FRAGMENT);
 250          ok = ps20_sampler( emit, decl->Semantic, idx );
 251          break;
 252
 253       case TGSI_FILE_INPUT:
 254          if (emit->unit == PIPE_SHADER_VERTEX)
 255             ok = vs20_input( emit, decl->Semantic, idx );
 256          else
 257             ok = ps20_input( emit, decl->Semantic, idx );
 258          break;
 259
 260       case TGSI_FILE_OUTPUT:
 261          if (emit->unit == PIPE_SHADER_VERTEX)
 262             ok = vs20_output( emit, decl->Semantic, idx );
 263          else
 264             ok = ps20_output( emit, decl->Semantic, idx );
 265          break;
 266
 267       default:
 268          /* don't need to declare other vars */
 269          ok = TRUE;
 270       }
 271
 272       if (!ok)
 273          return FALSE;
 274    }
 275
 276    return TRUE;
 277 }
 278
 279
 280