ac/nir: handle abs modifier

src/amd/common/ac_nir_to_llvm.c

@@ -153,6 +153,12 @@ static LLVMBasicBlockRef get_block(struct ac_nir_context *nir,
 	return (LLVMBasicBlockRef)entry->data;
 }
 
+static LLVMValueRef emit_iabs(struct ac_llvm_context *ctx,
+			      LLVMValueRef src0)
+{
+	return ac_build_imax(ctx, src0, LLVMBuildNeg(ctx->builder, src0, ""));
+}
+
 static LLVMValueRef get_alu_src(struct ac_nir_context *ctx,
                                 nir_alu_src src,
                                 unsigned num_components)
@@ -188,18 +194,37 @@ static LLVMValueRef get_alu_src(struct ac_nir_context *ctx,
 		}
 	}
 
-	if (src.negate) {
-		LLVMTypeRef type = LLVMTypeOf(value);
-		if (LLVMGetTypeKind(type) == LLVMVectorTypeKind)
-			type = LLVMGetElementType(type);
+	LLVMTypeRef type = LLVMTypeOf(value);
+	if (LLVMGetTypeKind(type) == LLVMVectorTypeKind)
+		type = LLVMGetElementType(type);
+
+	if (src.abs) {
+		if (LLVMGetTypeKind(type) == LLVMIntegerTypeKind) {
+			value = emit_iabs(&ctx->ac, value);
+		} else {
+			char name[128];
+			unsigned fsize = type == ctx->ac.f16 ? 16 :
+					 type == ctx->ac.f32 ? 32 : 64;
+
+			if (LLVMGetTypeKind(LLVMTypeOf(value)) == LLVMVectorTypeKind) {
+				snprintf(name, sizeof(name), "llvm.fabs.v%uf%u",
+					 LLVMGetVectorSize(LLVMTypeOf(value)), fsize);
+			} else {
+				snprintf(name, sizeof(name), "llvm.fabs.f%u", fsize);
+			}
+
+			value = ac_build_intrinsic(&ctx->ac, name, LLVMTypeOf(value),
+						   &value, 1, AC_FUNC_ATTR_READNONE);
+		}
+	}
 
+	if (src.negate) {
 		if (LLVMGetTypeKind(type) == LLVMIntegerTypeKind)
 			value = LLVMBuildNeg(ctx->ac.builder, value, "");
 		else
 			value = LLVMBuildFNeg(ctx->ac.builder, value, "");
 	}
 
-	assert(!src.abs);
 	return value;
 }
 
@@ -289,12 +314,6 @@ static LLVMValueRef emit_bcsel(struct ac_llvm_context *ctx,
 			       ac_to_integer_or_pointer(ctx, src2), "");
 }
 
-static LLVMValueRef emit_iabs(struct ac_llvm_context *ctx,
-			      LLVMValueRef src0)
-{
-	return ac_build_imax(ctx, src0, LLVMBuildNeg(ctx->builder, src0, ""));
-}
-
 static LLVMValueRef emit_uint_carry(struct ac_llvm_context *ctx,
 				    const char *intrin,
 				    LLVMValueRef src0, LLVMValueRef src1)