[Mesa-dev] [PATCH 3/4] ac: add support for trinary_minmax instructions

[Daniel Schürmann]

---
 src/amd/common/ac_nir_to_llvm.c | 53 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index 9b85069860..e78f4e8dcd 100644
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -2040,6 +2040,59 @@ static void visit_alu(struct ac_nir_context *ctx, const nir_alu_instr *instr)
 			in[chan] = ac_llvm_extract_elem(&ctx->ac, src[0], chan);
 		result = ac_build_intrinsic(&ctx->ac,  "llvm.amdgcn.cubeid",
 						ctx->ac.f32, in, 3, AC_FUNC_ATTR_READNONE);
+	}
+
+	case nir_op_fmin3:
+		result = emit_intrin_2f_param(&ctx->ac, "llvm.minnum",
+						ac_to_float_type(&ctx->ac, def_type), src[0], src[1]);
+		result = emit_intrin_2f_param(&ctx->ac, "llvm.minnum",
+						ac_to_float_type(&ctx->ac, def_type), result, src[2]);
+		break;
+	case nir_op_umin3:
+		result = emit_minmax_int(&ctx->ac, LLVMIntULT, src[0], src[1]);
+		result = emit_minmax_int(&ctx->ac, LLVMIntULT, result, src[2]);
+		break;
+	case nir_op_imin3:
+		result = emit_minmax_int(&ctx->ac, LLVMIntSLT, src[0], src[1]);
+		result = emit_minmax_int(&ctx->ac, LLVMIntSLT, result, src[2]);
+		break;
+	case nir_op_fmax3:
+		result = emit_intrin_2f_param(&ctx->ac, "llvm.maxnum",
+						ac_to_float_type(&ctx->ac, def_type), src[0], src[1]);
+		result = emit_intrin_2f_param(&ctx->ac, "llvm.maxnum",
+						ac_to_float_type(&ctx->ac, def_type), result, src[2]);
+		break;
+	case nir_op_umax3:
+		result = emit_minmax_int(&ctx->ac, LLVMIntUGT, src[0], src[1]);
+		result = emit_minmax_int(&ctx->ac, LLVMIntUGT, result, src[2]);
+		break;
+	case nir_op_imax3:
+		result = emit_minmax_int(&ctx->ac, LLVMIntSGT, src[0], src[1]);
+		result = emit_minmax_int(&ctx->ac, LLVMIntSGT, result, src[2]);
+		break;
+	case nir_op_fmed3: {
+		LLVMValueRef tmp1 = emit_intrin_2f_param(&ctx->ac, "llvm.minnum",
+						ac_to_float_type(&ctx->ac, def_type), src[0], src[1]);
+		LLVMValueRef tmp2 = emit_intrin_2f_param(&ctx->ac, "llvm.maxnum",
+						ac_to_float_type(&ctx->ac, def_type), src[0], src[1]);
+		tmp2 = emit_intrin_2f_param(&ctx->ac, "llvm.minnum",
+						ac_to_float_type(&ctx->ac, def_type), tmp2, src[2]);
+		result = emit_intrin_2f_param(&ctx->ac, "llvm.maxnum",
+						ac_to_float_type(&ctx->ac, def_type), tmp1, tmp2);
+		break;
+	}
+	case nir_op_imed3: {
+		LLVMValueRef tmp1 = emit_minmax_int(&ctx->ac, LLVMIntSLT, src[0], src[1]);
+		LLVMValueRef tmp2 = emit_minmax_int(&ctx->ac, LLVMIntSGT, src[0], src[1]);
+		tmp2 = emit_minmax_int(&ctx->ac, LLVMIntSLT, tmp2, src[2]);
+		result = emit_minmax_int(&ctx->ac, LLVMIntSGT, tmp1, tmp2);
+		break;
+	}
+	case nir_op_umed3: {
+		LLVMValueRef tmp1 = emit_minmax_int(&ctx->ac, LLVMIntULT, src[0], src[1]);
+		LLVMValueRef tmp2 = emit_minmax_int(&ctx->ac, LLVMIntUGT, src[0], src[1]);
+		tmp2 = emit_minmax_int(&ctx->ac, LLVMIntULT, tmp2, src[2]);
+		result = emit_minmax_int(&ctx->ac, LLVMIntUGT, tmp1, tmp2);
 		break;
 	}
 
-- 
2.14.1