fx.bcx.ins().fcvt_from_uint(to_ty, from)
}
} else if from_ty.is_float() && to_ty.is_int() {
- if to_ty == types::I128 {
+ let val = if to_ty == types::I128 {
// _____sssf___
// __fix sfti: f32 -> i128
// __fix dfti: f64 -> i128
let to_rust_ty = if to_signed { fx.tcx.types.i128 } else { fx.tcx.types.u128 };
- return fx
- .easy_call(&name, &[CValue::by_val(from, fx.layout_of(from_rust_ty))], to_rust_ty)
- .load_scalar(fx);
- }
-
- // float -> int-like
- if to_ty == types::I8 || to_ty == types::I16 {
+ fx.easy_call(&name, &[CValue::by_val(from, fx.layout_of(from_rust_ty))], to_rust_ty)
+ .load_scalar(fx)
+ } else if to_ty == types::I8 || to_ty == types::I16 {
// FIXME implement fcvt_to_*int_sat.i8/i16
let val = if to_signed {
fx.bcx.ins().fcvt_to_sint_sat(types::I32, from)
fx.bcx.ins().fcvt_to_sint_sat(to_ty, from)
} else {
fx.bcx.ins().fcvt_to_uint_sat(to_ty, from)
+ };
+
+ if let Some(false) = fx.tcx.sess.opts.debugging_opts.saturating_float_casts {
+ return val;
+ }
+
+ let is_not_nan = fx.bcx.ins().fcmp(FloatCC::Equal, from, from);
+ if to_ty == types::I128 {
+ // FIXME(bytecodealliance/wasmtime#3963): select.i128 on fcmp eq miscompiles
+ let (lsb, msb) = fx.bcx.ins().isplit(val);
+ let zero = fx.bcx.ins().iconst(types::I64, 0);
+ let lsb = fx.bcx.ins().select(is_not_nan, lsb, zero);
+ let msb = fx.bcx.ins().select(is_not_nan, msb, zero);
+ fx.bcx.ins().iconcat(lsb, msb)
+ } else {
+ let zero = fx.bcx.ins().iconst(to_ty, 0);
+ fx.bcx.ins().select(is_not_nan, val, zero)
}
} else if from_ty.is_float() && to_ty.is_float() {
// float -> float