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Implement 128bit checked add and sub
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@ -44,12 +44,10 @@ unsafe impl Copy for u8 {}
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unsafe impl Copy for u16 {}
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unsafe impl Copy for u32 {}
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unsafe impl Copy for u64 {}
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unsafe impl Copy for u128 {}
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unsafe impl Copy for usize {}
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unsafe impl Copy for i8 {}
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unsafe impl Copy for i16 {}
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unsafe impl Copy for i32 {}
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unsafe impl Copy for i128 {}
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unsafe impl Copy for isize {}
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unsafe impl Copy for char {}
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unsafe impl<'a, T: ?Sized> Copy for &'a T {}
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@ -146,22 +144,6 @@ impl Add for usize {
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}
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}
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impl Add for u128 {
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type Output = Self;
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fn add(self, rhs: Self) -> Self {
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self + rhs
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}
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}
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impl Add for i128 {
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type Output = Self;
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fn add(self, rhs: Self) -> Self {
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self + rhs
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}
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}
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#[lang = "sub"]
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pub trait Sub<RHS = Self> {
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type Output;
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@ -286,15 +268,6 @@ impl PartialEq for i32 {
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}
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}
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impl PartialEq for i128 {
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fn eq(&self, other: &i128) -> bool {
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(*self) == (*other)
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}
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fn ne(&self, other: &i128) -> bool {
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(*self) != (*other)
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}
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}
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impl PartialEq for isize {
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fn eq(&self, other: &isize) -> bool {
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(*self) == (*other)
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@ -23,6 +23,9 @@ fn main() {
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checked_div_u128(0u128, 2u128);
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assert_eq!(1u128 + 2, 3);
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// overflow panic
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// 0xFEDCBA987654321123456789ABCDEFu128 + 0xFEDCBA987654321123456789ABCDEFu128;
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println!("{}", 0b100010000000000000000000000000000u128 >> 10);
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println!("{}", 0xFEDCBA987654321123456789ABCDEFu128 >> 64);
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println!("{} >> 64 == {}", 0xFEDCBA987654321123456789ABCDEFu128 as i128, 0xFEDCBA987654321123456789ABCDEFu128 as i128 >> 64);
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@ -23,8 +23,20 @@ pub fn maybe_codegen<'a, 'tcx>(
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assert!(!checked);
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return None;
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}
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BinOp::Add | BinOp::Sub => {
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return None; // FIXME implement checked versions
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BinOp::Add | BinOp::Sub if !checked => return None,
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BinOp::Add => {
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return Some(if is_signed {
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fx.easy_call("__rust_i128_addo", &[lhs, rhs], out_ty)
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} else {
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fx.easy_call("__rust_u128_addo", &[lhs, rhs], out_ty)
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})
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}
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BinOp::Sub => {
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return Some(if is_signed {
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fx.easy_call("__rust_i128_subo", &[lhs, rhs], out_ty)
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} else {
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fx.easy_call("__rust_u128_subo", &[lhs, rhs], out_ty)
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})
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}
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BinOp::Offset => unreachable!("offset should only be used on pointers, not 128bit ints"),
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BinOp::Mul => {
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