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[ci skip] style fixes, multipart add test

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This commit is contained in:
Nikolay Volf 2016-02-26 15:56:55 +03:00
parent f29417eea9
commit e95538f3ec
1 changed files with 28 additions and 7 deletions
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35
util/src/uint.rs
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@ -51,7 +51,7 @@ macro_rules! impl_map_from {
}
}
#[cfg(not(all(feature="x64asm", target_arch = "x86_64")))]
#[cfg(not(all(feature="x64asm", target_arch="x86_64")))]
macro_rules! uint_overflowing_add {
($name:ident, $n_words:expr, $self_expr: expr, $other: expr) => ({
uint_overflowing_add_reg!($name, $n_words, $self_expr, $other)
@ -89,7 +89,7 @@ macro_rules! uint_overflowing_add_reg {
}
#[cfg(all(feature="x64asm", target_arch = "x86_64"))]
#[cfg(all(feature="x64asm", target_arch="x86_64"))]
macro_rules! uint_overflowing_add {
(U256, $n_words: expr, $self_expr: expr, $other: expr) => ({
let mut result: [u64; 4] = unsafe { mem::uninitialized() };
@ -119,7 +119,7 @@ macro_rules! uint_overflowing_add {
)
}
#[cfg(not(all(feature="x64asm", target_arch = "x86_64")))]
#[cfg(not(all(feature="x64asm", target_arch="x86_64")))]
macro_rules! uint_overflowing_sub {
($name:ident, $n_words: expr, $self_expr: expr, $other: expr) => ({
let res = overflowing!((!$other).overflowing_add(From::from(1u64)));
@ -128,7 +128,7 @@ macro_rules! uint_overflowing_sub {
})
}
#[cfg(all(feature="x64asm", target_arch = "x86_64"))]
#[cfg(all(feature="x64asm", target_arch="x86_64"))]
macro_rules! uint_overflowing_sub {
(U256, $n_words: expr, $self_expr: expr, $other: expr) => ({
let mut result: [u64; 4] = unsafe { mem::uninitialized() };
@ -158,7 +158,7 @@ macro_rules! uint_overflowing_sub {
})
}
#[cfg(all(feature="x64asm", target_arch = "x86_64"))]
#[cfg(all(feature="x64asm", target_arch="x86_64"))]
macro_rules! uint_overflowing_mul {
(U256, $n_words: expr, $self_expr: expr, $other: expr) => ({
let mut result: [u64; 4] = unsafe { mem::uninitialized() };
@ -222,7 +222,7 @@ macro_rules! uint_overflowing_mul {
adc $$0, %rdx
or %rdx, %rcx
cmpq $$0, %rcx
cmpq $$0, %rcx
jne 2f
popcnt $8, %rcx
@ -257,7 +257,7 @@ macro_rules! uint_overflowing_mul {
)
}
#[cfg(not(all(feature="x64asm", target_arch = "x86_64")))]
#[cfg(not(all(feature="x64asm", target_arch="x86_64")))]
macro_rules! uint_overflowing_mul {
($name:ident, $n_words: expr, $self_expr: expr, $other: expr) => ({
uint_overflowing_mul_reg!($name, $n_words, $self_expr, $other)
@ -1468,5 +1468,26 @@ mod tests {
fn display_uint_zero() {
assert_eq!(format!("{}", U256::from(0)), "0");
}
#[test]
fn u256_multi_adds() {
let (result, _) = U256([0, 0, 0, 0]).overflowing_add(U256([0, 0, 0, 0]));
assert_eq!(result, U256([0, 0, 0, 0]));
let (result, _) = U256([0, 0, 0, 1]).overflowing_add(U256([0, 0, 0, 1]));
assert_eq!(result, U256([0, 0, 0, 2]));
let (result, overflow) = U256([0, 0, 2, 1]).overflowing_add(U256([0, 0, 3, 1]));
assert_eq!(result, U256([0, 0, 5, 2]));
assert!(!overflow);
let (_, overflow) = U256([::std::u64::MAX, ::std::u64::MAX, ::std::u64::MAX, ::std::u64::MAX])
.overflowing_add(U256([::std::u64::MAX, ::std::u64::MAX, ::std::u64::MAX, ::std::u64::MAX]));
assert!(overflow);
let (_, overflow) = U256([0, 0, 0, ::std::u64::MAX]).overflowing_add(U256([0, 0, 0, ::std::u64::MAX]));
assert!(overflow);
}
}