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add intrinsics for checked overflow add/sub/mul

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This commit is contained in:
Daniel Micay 2013-08-07 15:40:09 -04:00
parent eebcff1493
commit 076b91f8ad
10 changed files with 663 additions and 8 deletions
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54
src/libstd/unstable/intrinsics.rs
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@ -428,6 +428,60 @@ extern "rust-intrinsic" {
pub fn bswap16(x: i16) -> i16;
pub fn bswap32(x: i32) -> i32;
pub fn bswap64(x: i64) -> i64;
#[cfg(not(stage0))]
pub fn i8_add_with_overflow(x: i8, y: i8) -> (i8, bool);
#[cfg(not(stage0))]
pub fn i16_add_with_overflow(x: i16, y: i16) -> (i16, bool);
#[cfg(not(stage0))]
pub fn i32_add_with_overflow(x: i32, y: i32) -> (i32, bool);
#[cfg(not(stage0))]
pub fn i64_add_with_overflow(x: i64, y: i64) -> (i64, bool);
#[cfg(not(stage0))]
pub fn u8_add_with_overflow(x: u8, y: u8) -> (u8, bool);
#[cfg(not(stage0))]
pub fn u16_add_with_overflow(x: u16, y: u16) -> (u16, bool);
#[cfg(not(stage0))]
pub fn u32_add_with_overflow(x: u32, y: u32) -> (u32, bool);
#[cfg(not(stage0))]
pub fn u64_add_with_overflow(x: u64, y: u64) -> (u64, bool);
#[cfg(not(stage0))]
pub fn i8_sub_with_overflow(x: i8, y: i8) -> (i8, bool);
#[cfg(not(stage0))]
pub fn i16_sub_with_overflow(x: i16, y: i16) -> (i16, bool);
#[cfg(not(stage0))]
pub fn i32_sub_with_overflow(x: i32, y: i32) -> (i32, bool);
#[cfg(not(stage0))]
pub fn i64_sub_with_overflow(x: i64, y: i64) -> (i64, bool);
#[cfg(not(stage0))]
pub fn u8_sub_with_overflow(x: u8, y: u8) -> (u8, bool);
#[cfg(not(stage0))]
pub fn u16_sub_with_overflow(x: u16, y: u16) -> (u16, bool);
#[cfg(not(stage0))]
pub fn u32_sub_with_overflow(x: u32, y: u32) -> (u32, bool);
#[cfg(not(stage0))]
pub fn u64_sub_with_overflow(x: u64, y: u64) -> (u64, bool);
#[cfg(not(stage0))]
pub fn i8_mul_with_overflow(x: i8, y: i8) -> (i8, bool);
#[cfg(not(stage0))]
pub fn i16_mul_with_overflow(x: i16, y: i16) -> (i16, bool);
#[cfg(not(stage0))]
pub fn i32_mul_with_overflow(x: i32, y: i32) -> (i32, bool);
#[cfg(not(stage0))]
pub fn i64_mul_with_overflow(x: i64, y: i64) -> (i64, bool);
#[cfg(not(stage0))]
pub fn u8_mul_with_overflow(x: u8, y: u8) -> (u8, bool);
#[cfg(not(stage0))]
pub fn u16_mul_with_overflow(x: u16, y: u16) -> (u16, bool);
#[cfg(not(stage0))]
pub fn u32_mul_with_overflow(x: u32, y: u32) -> (u32, bool);
#[cfg(not(stage0))]
pub fn u64_mul_with_overflow(x: u64, y: u64) -> (u64, bool);
}
#[cfg(target_endian = "little")] pub fn to_le16(x: i16) -> i16 { x }