From: Marek Olšák <marek.olsak@amd.com>
Date: Sat, 4 Jul 2020 20:17:28 +0000 (-0400)
Subject: ac/llvm: fix amdgcn.rcp for v2f16
X-Git-Url: https://git.libre-soc.org/?p=mesa.git;a=commitdiff_plain;h=04ed3522c9093472461cad78380d5d66ac8a2519

ac/llvm: fix amdgcn.rcp for v2f16

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6284>
---

diff --git a/src/amd/llvm/ac_nir_to_llvm.c b/src/amd/llvm/ac_nir_to_llvm.c
index 4537ec71267..337ca6605fc 100644
--- a/src/amd/llvm/ac_nir_to_llvm.c
+++ b/src/amd/llvm/ac_nir_to_llvm.c
@@ -216,6 +216,35 @@ static LLVMValueRef emit_intrin_1f_param(struct ac_llvm_context *ctx,
 	return ac_build_intrinsic(ctx, name, result_type, params, 1, AC_FUNC_ATTR_READNONE);
 }
 
+static LLVMValueRef emit_intrin_1f_param_scalar(struct ac_llvm_context *ctx,
+						const char *intrin,
+						LLVMTypeRef result_type,
+						LLVMValueRef src0)
+{
+	if (LLVMGetTypeKind(result_type) != LLVMVectorTypeKind)
+		return emit_intrin_1f_param(ctx, intrin, result_type, src0);
+
+	LLVMTypeRef elem_type = LLVMGetElementType(result_type);
+	LLVMValueRef ret = LLVMGetUndef(result_type);
+
+	/* Scalarize the intrinsic, because vectors are not supported. */
+	for (unsigned i = 0; i < LLVMGetVectorSize(result_type); i++) {
+		char name[64], type[64];
+		LLVMValueRef params[] = {
+			ac_to_float(ctx, ac_llvm_extract_elem(ctx, src0, i)),
+		};
+
+		ac_build_type_name_for_intr(LLVMTypeOf(params[0]), type, sizeof(type));
+		ASSERTED const int length = snprintf(name, sizeof(name), "%s.%s", intrin, type);
+		assert(length < sizeof(name));
+		ret = LLVMBuildInsertElement(ctx->builder, ret,
+					     ac_build_intrinsic(ctx, name, elem_type, params,
+								1, AC_FUNC_ATTR_READNONE),
+					     LLVMConstInt(ctx->i32, i, 0), "");
+	}
+	return ret;
+}
+
 static LLVMValueRef emit_intrin_2f_param(struct ac_llvm_context *ctx,
 				       const char *intrin,
 				       LLVMTypeRef result_type,
@@ -706,8 +735,8 @@ static void visit_alu(struct ac_nir_context *ctx, const nir_alu_instr *instr)
 			result = LLVMBuildFDiv(ctx->ac.builder, ctx->ac.f64_1,
 					       ac_to_float(&ctx->ac, src[0]), "");
 		} else {
-			result = emit_intrin_1f_param(&ctx->ac, "llvm.amdgcn.rcp",
-						      ac_to_float_type(&ctx->ac, def_type), src[0]);
+			result = emit_intrin_1f_param_scalar(&ctx->ac, "llvm.amdgcn.rcp",
+							     ac_to_float_type(&ctx->ac, def_type), src[0]);
 		}
 		if (ctx->abi->clamp_div_by_zero)
 			result = ac_build_fmin(&ctx->ac, result,