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wined3d: Hardcode local loop control ints into the code in reps. 

This helps the compiler to unroll the loop and dodges a crash on OSX. It is
similar to what we do in "loop aL, iX" already.
This commit is contained in:
Stefan Dösinger 2009-04-22 19:35:19 +02:00 committed by Alexandre Julliard
parent 1e48e160f5
commit 10ad2e8e03
1 changed files with 22 additions and 4 deletions
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26
dlls/wined3d/glsl_shader.c
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@ -2359,11 +2359,29 @@ static void shader_glsl_rep(const struct wined3d_shader_instruction *ins)
{
IWineD3DBaseShaderImpl *shader = (IWineD3DBaseShaderImpl *)ins->ctx->shader;
glsl_src_param_t src0_param;
const DWORD *control_values = NULL;
const local_constant *constant;
shader_glsl_add_src_param(ins, &ins->src[0], WINED3DSP_WRITEMASK_0, &src0_param);
shader_addline(ins->ctx->buffer, "for (tmpInt%d = 0; tmpInt%d < %s; tmpInt%d++) {\n",
shader->baseShader.cur_loop_depth, shader->baseShader.cur_loop_depth,
src0_param.param_str, shader->baseShader.cur_loop_depth);
/* Try to hardcode local values to help the GLSL compiler to unroll and optimize the loop */
if(ins->src[0].register_type == WINED3DSPR_CONSTINT) {
LIST_FOR_EACH_ENTRY(constant, &shader->baseShader.constantsI, local_constant, entry) {
if(constant->idx == ins->src[0].register_idx) {
control_values = constant->value;
break;
}
}
}
if(control_values) {
shader_addline(ins->ctx->buffer, "for (tmpInt%d = 0; tmpInt%d < %d; tmpInt%d++) {\n",
shader->baseShader.cur_loop_depth, shader->baseShader.cur_loop_depth,
control_values[0], shader->baseShader.cur_loop_depth);
} else {
shader_glsl_add_src_param(ins, &ins->src[0], WINED3DSP_WRITEMASK_0, &src0_param);
shader_addline(ins->ctx->buffer, "for (tmpInt%d = 0; tmpInt%d < %s; tmpInt%d++) {\n",
shader->baseShader.cur_loop_depth, shader->baseShader.cur_loop_depth,
src0_param.param_str, shader->baseShader.cur_loop_depth);
}
shader->baseShader.cur_loop_depth++;
}