src/gallium/auxiliary/draw/draw_vs_llvm.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
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  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28  /*
  29   * Authors:
  30   *   Zack Rusin
  31   *   Keith Whitwell <keith@tungstengraphics.com>
  32   *   Brian Paul
  33   */
  34
  35 #include "pipe/p_util.h"
  36 #include "pipe/p_shader_tokens.h"
  37 #include "draw_private.h"
  38 #include "draw_context.h"
  39 #include "draw_vs.h"
  40
  41 #include "tgsi/util/tgsi_parse.h"
  42
  43 #ifdef MESA_LLVM
  44
  45 #include "gallivm/gallivm.h"
  46
  47 struct draw_llvm_vertex_shader {
  48    struct draw_vertex_shader base;
  49    struct gallivm_prog *llvm_prog;
  50    struct tgsi_exec_machine *machine;
  51 };
  52
  53
  54 static void
  55 vs_llvm_prepare( struct draw_vertex_shader *base,
  56                  struct draw_context *draw )
  57 {
  58 }
  59
  60
  61
  62
  63 static void
  64 vs_llvm_run_linear( struct draw_vertex_shader *base,
  65                    const float (*input)[4],
  66                    float (*output)[4],
  67                    const float (*constants)[4],
  68                    unsigned count,
  69                    unsigned input_stride,
  70                    unsigned output_stride )
  71 {
  72    struct draw_llvm_vertex_shader *shader =
  73       (struct draw_llvm_vertex_shader *)base;
  74
  75    struct tgsi_exec_machine *machine = shader->machine;
  76    unsigned int i, j;
  77    unsigned slot;
  78
  79
  80    for (i = 0; i < count; i += MAX_TGSI_VERTICES) {
  81       unsigned int max_vertices = MIN2(MAX_TGSI_VERTICES, count - i);
  82
  83       /* Swizzle inputs.
  84        */
  85       for (j = 0; j < max_vertices; j++) {
  86          for (slot = 0; slot < base->info.num_inputs; slot++) {
  87             machine->Inputs[slot].xyzw[0].f[j] = input[slot][0];
  88             machine->Inputs[slot].xyzw[1].f[j] = input[slot][1];
  89             machine->Inputs[slot].xyzw[2].f[j] = input[slot][2];
  90             machine->Inputs[slot].xyzw[3].f[j] = input[slot][3];
  91          }
  92
  93          input = (const float (*)[4])((const char *)input + input_stride);
  94       }
  95
  96       /* run shader */
  97       gallivm_cpu_vs_exec(shader->llvm_prog,
  98                           machine->Inputs,
  99                           machine->Outputs,
 100                           (float (*)[4]) constants,
 101                           machine->Temps);
 102
 103
 104       /* Unswizzle all output results
 105        */
 106       for (slot = 1; slot < base->info.num_inputs; slot++) {
 107          output[slot][0] = machine->Outputs[slot].xyzw[0].f[j];
 108          output[slot][1] = machine->Outputs[slot].xyzw[1].f[j];
 109          output[slot][2] = machine->Outputs[slot].xyzw[2].f[j];
 110          output[slot][3] = machine->Outputs[slot].xyzw[3].f[j];
 111
 112          output = (float (*)[4])((char *)output + output_stride);
 113       }
 114    }
 115 }
 116
 117
 118
 119 static void
 120 vs_llvm_delete( struct draw_vertex_shader *base )
 121 {
 122    struct draw_llvm_vertex_shader *shader =
 123       (struct draw_llvm_vertex_shader *)base;
 124
 125    /* Do something to free compiled shader:
 126     */
 127
 128    FREE( (void*) shader->base.state.tokens );
 129    FREE( shader );
 130 }
 131
 132
 133
 134
 135 struct draw_vertex_shader *
 136 draw_create_vs_llvm(struct draw_context *draw,
 137                     const struct pipe_shader_state *templ)
 138 {
 139    struct draw_llvm_vertex_shader *vs;
 140    uint nt = tgsi_num_tokens(templ->tokens);
 141
 142    vs = CALLOC_STRUCT( draw_llvm_vertex_shader );
 143    if (vs == NULL)
 144       return NULL;
 145
 146    /* we make a private copy of the tokens */
 147    vs->base.state.tokens = mem_dup(templ->tokens, nt * sizeof(templ->tokens[0]));
 148
 149    tgsi_scan_shader(vs->base.state.tokens, &vs->base.info);
 150
 151    vs->base.prepare = vs_llvm_prepare;
 152    vs->base.run_linear = vs_llvm_run_linear;
 153    vs->base.delete = vs_llvm_delete;
 154    vs->machine = &draw->machine;
 155
 156    {
 157       struct gallivm_ir *ir = gallivm_ir_new(GALLIVM_VS);
 158       gallivm_ir_set_layout(ir, GALLIVM_SOA);
 159       gallivm_ir_set_components(ir, 4);
 160       gallivm_ir_fill_from_tgsi(ir, vs->base.state.tokens);
 161       vs->llvm_prog = gallivm_ir_compile(ir);
 162       gallivm_ir_delete(ir);
 163    }
 164
 165    draw->engine = gallivm_global_cpu_engine();
 166
 167    /* XXX: Why are there two versions of this?  Shouldn't creating the
 168     *      engine be a separate operation to compiling a shader?
 169     */
 170    if (!draw->engine) {
 171       draw->engine = gallivm_cpu_engine_create(vs->llvm_prog);
 172    }
 173    else {
 174       gallivm_cpu_jit_compile(draw->engine, vs->llvm_prog);
 175    }
 176
 177    return &vs->base;
 178 }
 179
 180
 181
 182
 183
 184 #else
 185
 186 struct draw_vertex_shader *
 187 draw_create_vs_llvm(struct draw_context *draw,
 188                           const struct pipe_shader_state *shader)
 189 {
 190    return NULL;
 191 }
 192
 193 #endif