diff options
Diffstat (limited to 'src/gallium/drivers/radeonsi/radeonsi_shader.c')
| -rw-r--r-- | src/gallium/drivers/radeonsi/radeonsi_shader.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeonsi/radeonsi_shader.c b/src/gallium/drivers/radeonsi/radeonsi_shader.c index ce2095c8652..ec9d9f3a7a1 100644 --- a/src/gallium/drivers/radeonsi/radeonsi_shader.c +++ b/src/gallium/drivers/radeonsi/radeonsi_shader.c @@ -31,6 +31,7 @@ #include "gallivm/lp_bld_const.h" #include "gallivm/lp_bld_gather.h" #include "gallivm/lp_bld_intr.h" +#include "gallivm/lp_bld_logic.h" #include "gallivm/lp_bld_tgsi.h" #include "radeon_llvm.h" #include "radeon_llvm_emit.h" @@ -546,6 +547,37 @@ static void si_llvm_emit_prologue(struct lp_build_tgsi_context *bld_base) } +static void si_alpha_test(struct lp_build_tgsi_context *bld_base, + unsigned index) +{ + struct si_shader_context *si_shader_ctx = si_shader_context(bld_base); + struct gallivm_state *gallivm = bld_base->base.gallivm; + + if (si_shader_ctx->key.alpha_func != PIPE_FUNC_NEVER) { + LLVMValueRef out_ptr = si_shader_ctx->radeon_bld.soa.outputs[index][3]; + LLVMValueRef alpha_pass = + lp_build_cmp(&bld_base->base, + si_shader_ctx->key.alpha_func, + LLVMBuildLoad(gallivm->builder, out_ptr, ""), + lp_build_const_float(gallivm, si_shader_ctx->key.alpha_ref)); + LLVMValueRef arg = + lp_build_select(&bld_base->base, + alpha_pass, + lp_build_const_float(gallivm, 1.0f), + lp_build_const_float(gallivm, -1.0f)); + + build_intrinsic(gallivm->builder, + "llvm.AMDGPU.kill", + LLVMVoidTypeInContext(gallivm->context), + &arg, 1, 0); + } else { + build_intrinsic(gallivm->builder, + "llvm.AMDGPU.kilp", + LLVMVoidTypeInContext(gallivm->context), + NULL, 0, 0); + } +} + /* XXX: This is partially implemented for VS only at this point. It is not complete */ static void si_llvm_emit_epilogue(struct lp_build_tgsi_context * bld_base) { @@ -606,6 +638,10 @@ static void si_llvm_emit_epilogue(struct lp_build_tgsi_context * bld_base) param_count++; } else { target = V_008DFC_SQ_EXP_MRT + color_count; + if (color_count == 0 && + si_shader_ctx->key.alpha_func != PIPE_FUNC_ALWAYS) + si_alpha_test(bld_base, index); + color_count++; } break; |