diff options
| author | Michel Dänzer <[email protected]> | 2013-08-08 16:58:00 +0200 |
|---|---|---|
| committer | Michel Dänzer <[email protected]> | 2013-08-15 17:53:50 +0200 |
| commit | 2f98dc223f625f6df79268848c46af7f224fe7e9 (patch) | |
| tree | cfe1f25e942fae49c89487784b78d8fd34ad9395 /src/gallium/drivers/radeonsi/radeonsi_shader.c | |
| parent | b00269aa5887b88d2e037d6bfa374779902f8743 (diff) | |
radeonsi: Don't export unused clip distance vectors from vertex shader
E.g. the Source engine seems to always write to gl_ClipVertex, but normally
doesn't enable any GL_CLIP_DISTANCEn states. This change removes some
irrelevant parts from the generated vertex shader code in such cases.
Reviewed-by: Tom Stellard <[email protected]>
Diffstat (limited to 'src/gallium/drivers/radeonsi/radeonsi_shader.c')
| -rw-r--r-- | src/gallium/drivers/radeonsi/radeonsi_shader.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/gallium/drivers/radeonsi/radeonsi_shader.c b/src/gallium/drivers/radeonsi/radeonsi_shader.c index dd9581dd95a..6bf4b05ec87 100644 --- a/src/gallium/drivers/radeonsi/radeonsi_shader.c +++ b/src/gallium/drivers/radeonsi/radeonsi_shader.c @@ -565,6 +565,7 @@ static void si_llvm_emit_clipvertex(struct lp_build_tgsi_context * bld_base, LLVMValueRef (*pos)[9], unsigned index) { struct si_shader_context *si_shader_ctx = si_shader_context(bld_base); + struct si_pipe_shader *shader = si_shader_ctx->shader; struct lp_build_context *base = &bld_base->base; struct lp_build_context *uint = &si_shader_ctx->radeon_bld.soa.bld_base.uint_bld; unsigned reg_index; @@ -583,6 +584,11 @@ static void si_llvm_emit_clipvertex(struct lp_build_tgsi_context * bld_base, for (reg_index = 0; reg_index < 2; reg_index ++) { LLVMValueRef *args = pos[2 + reg_index]; + if (!(shader->key.vs.ucps_enabled & (1 << reg_index))) + continue; + + shader->shader.clip_dist_write |= 0xf << (4 * reg_index); + args[5] = args[6] = args[7] = @@ -709,13 +715,15 @@ handle_semantic: } break; case TGSI_SEMANTIC_CLIPDIST: + if (!(si_shader_ctx->shader->key.vs.ucps_enabled & + (1 << d->Semantic.Index))) + continue; shader->clip_dist_write |= d->Declaration.UsageMask << (d->Semantic.Index << 2); target = V_008DFC_SQ_EXP_POS + 2 + d->Semantic.Index; break; case TGSI_SEMANTIC_CLIPVERTEX: si_llvm_emit_clipvertex(bld_base, pos_args, index); - shader->clip_dist_write = 0xFF; continue; case TGSI_SEMANTIC_FOG: case TGSI_SEMANTIC_GENERIC: |