From dd77faeca2819fc78a72f71ca9b996c209378cde Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Wed, 2 Nov 2016 01:21:15 +0000 Subject: [PATCH] ac/nir: add support for discard_if intrinsic (v2) We are going to start lowering to this in NIR code, so prepare radv for it. v2: handle conversion to kilp properly (nha) Cc: "13.0" Signed-off-by: Dave Airlie --- src/amd/common/ac_nir_to_llvm.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c index 8d364e6..1829465 100644 --- a/src/amd/common/ac_nir_to_llvm.c +++ b/src/amd/common/ac_nir_to_llvm.c @@ -2610,6 +2610,24 @@ static void emit_barrier(struct nir_to_llvm_context *ctx) ctx->voidt, NULL, 0, 0); } +static void emit_discard_if(struct nir_to_llvm_context *ctx, + nir_intrinsic_instr *instr) +{ + LLVMValueRef cond; + ctx->shader_info->fs.can_discard = true; + + cond = LLVMBuildICmp(ctx->builder, LLVMIntNE, + get_src(ctx, instr->src[0]), + ctx->i32zero, ""); + + cond = LLVMBuildSelect(ctx->builder, cond, + LLVMConstReal(ctx->f32, -1.0f), + ctx->f32zero, ""); + emit_llvm_intrinsic(ctx, "llvm.AMDGPU.kill", + LLVMVoidTypeInContext(ctx->context), + &cond, 1, 0); +} + static LLVMValueRef visit_load_local_invocation_index(struct nir_to_llvm_context *ctx) { @@ -2922,6 +2940,9 @@ static void visit_intrinsic(struct nir_to_llvm_context *ctx, LLVMVoidTypeInContext(ctx->context), NULL, 0, 0); break; + case nir_intrinsic_discard_if: + emit_discard_if(ctx, instr); + break; case nir_intrinsic_memory_barrier: emit_waitcnt(ctx); break; -- 2.7.4