diff options
Diffstat (limited to 'src/gallium/drivers/radeonsi/si_shader.c')
| -rw-r--r-- | src/gallium/drivers/radeonsi/si_shader.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c index c7ebb0f29bd..a119cbdc16c 100644 --- a/src/gallium/drivers/radeonsi/si_shader.c +++ b/src/gallium/drivers/radeonsi/si_shader.c @@ -2076,6 +2076,45 @@ static void si_llvm_emit_vs_epilogue(struct lp_build_tgsi_context * bld_base) outputs = MALLOC((info->num_outputs + 1) * sizeof(outputs[0])); + /* Vertex color clamping. + * + * This uses a state constant loaded in a user data SGPR and + * an IF statement is added that clamps all colors if the constant + * is true. + */ + if (si_shader_ctx->type == TGSI_PROCESSOR_VERTEX && + !si_shader_ctx->shader->is_gs_copy_shader) { + struct lp_build_if_state if_ctx; + LLVMValueRef cond = NULL; + LLVMValueRef addr, val; + + for (i = 0; i < info->num_outputs; i++) { + if (info->output_semantic_name[i] != TGSI_SEMANTIC_COLOR && + info->output_semantic_name[i] != TGSI_SEMANTIC_BCOLOR) + continue; + + /* We've found a color. */ + if (!cond) { + /* The state is in the first bit of the user SGPR. */ + cond = LLVMGetParam(si_shader_ctx->radeon_bld.main_fn, + SI_PARAM_VS_STATE_BITS); + cond = LLVMBuildTrunc(gallivm->builder, cond, + LLVMInt1TypeInContext(gallivm->context), ""); + lp_build_if(&if_ctx, gallivm, cond); + } + + for (j = 0; j < 4; j++) { + addr = si_shader_ctx->radeon_bld.soa.outputs[i][j]; + val = LLVMBuildLoad(gallivm->builder, addr, ""); + val = radeon_llvm_saturate(bld_base, val); + LLVMBuildStore(gallivm->builder, val, addr); + } + } + + if (cond) + lp_build_endif(&if_ctx); + } + for (i = 0; i < info->num_outputs; i++) { outputs[i].name = info->output_semantic_name[i]; outputs[i].sid = info->output_semantic_index[i]; @@ -3445,6 +3484,9 @@ static void create_function(struct si_shader_context *si_shader_ctx) if (shader->is_gs_copy_shader) { last_array_pointer = SI_PARAM_CONST; num_params = SI_PARAM_CONST+1; + } else { + params[SI_PARAM_VS_STATE_BITS] = i32; + num_params = SI_PARAM_VS_STATE_BITS+1; } /* The locations of the other parameters are assigned dynamically. */ |