Use correct sign extension on __powi*f2 arguments

Author: beetrees

src/abi/mod.rs

@@ -828,3 +828,31 @@ pub(crate) fn codegen_drop<'tcx>(
  }
  }
 }
+
+pub(crate) fn lib_call_arg_param(tcx: TyCtxt<'_>, ty: Type, is_signed: bool) -> AbiParam {
+ let param = AbiParam::new(ty);
+ if ty.is_int() && u64::from(ty.bits()) < tcx.data_layout.pointer_size.bits() {
+ match (&*tcx.sess.target.arch, &*tcx.sess.target.vendor) {
+ ("x86_64", _) | ("aarch64", "apple") => match (ty, is_signed) {
+ (types::I8 | types::I16, true) => param.sext(),
+ (types::I8 | types::I16, false) => param.uext(),
+ _ => param,
+ },
+ ("aarch64", _) => param,
+ ("riscv64", _) => match (ty, is_signed) {
+ (types::I32, _) | (_, true) => param.sext(),
+ _ => param.uext(),
+ },
+ ("s390x", _) => {
+ if is_signed {
+ param.sext()
+ } else {
+ param.uext()
+ }
+ }
+ _ => unimplemented!("{:?}", tcx.sess.target.arch),
+ }
+ } else {
+ param
+ }
+}

src/intrinsics/mod.rs

@@ -416,7 +416,8 @@ fn codegen_float_intrinsic_call<'tcx>(
  // These intrinsics aren't supported natively by Cranelift.
  // Lower them to a libcall.
  sym::powif32 | sym::powif64 => {
- let input_tys: Vec<_> = vec![AbiParam::new(clif_ty), AbiParam::new(types::I32)];
+ let input_tys: Vec<_> =
+ vec![AbiParam::new(clif_ty), lib_call_arg_param(fx.tcx, types::I32, true)];
  let ret_val = fx.lib_call(name, input_tys, vec![AbiParam::new(clif_ty)], &args)[0];
  CValue::by_val(ret_val, fx.layout_of(ty))
  }