bjoernager/rust
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Move unsigned_max etc into Size again

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This commit is contained in:
Andreas Liljeqvist 2021-09-06 20:11:29 +02:00
parent 459c9108e4
commit 9129f4306f
6 changed files with 37 additions and 37 deletions
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29
compiler/rustc_target/src/abi/mod.rs
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@ -392,6 +392,21 @@ impl Size {
// Truncate (shift left to drop out leftover values, shift right to fill with zeroes).
(value << shift) >> shift
}
#[inline]
pub fn signed_min(&self) -> i128 {
self.sign_extend(1_u128 << (self.bits() - 1)) as i128
}
#[inline]
pub fn signed_max(&self) -> i128 {
i128::MAX >> (128 - self.bits())
}
#[inline]
pub fn unsigned_max(&self) -> u128 {
u128::MAX >> (128 - self.bits())
}
}
// Panicking addition, subtraction and multiplication for convenience.
@ -775,7 +790,7 @@ impl WrappingRange {
/// Returns `true` if `size` completely fills the range.
#[inline]
pub fn is_full_for(&self, size: Size) -> bool {
let max_value = u128::MAX >> (128 - size.bits());
let max_value = size.unsigned_max();
debug_assert!(self.start <= max_value && self.end <= max_value);
(self.start == 0 && self.end == max_value) || (self.end + 1 == self.start)
}
@ -1067,9 +1082,9 @@ impl Niche {
pub fn available<C: HasDataLayout>(&self, cx: &C) -> u128 {
let Scalar { value, valid_range: v } = self.scalar;
let bits = value.size(cx).bits();
assert!(bits <= 128);
let max_value = !0u128 >> (128 - bits);
let size = value.size(cx);
assert!(size.bits() <= 128);
let max_value = size.unsigned_max();
// Find out how many values are outside the valid range.
let niche = v.end.wrapping_add(1)..v.start;
@ -1080,9 +1095,9 @@ impl Niche {
assert!(count > 0);
let Scalar { value, valid_range: v } = self.scalar;
let bits = value.size(cx).bits();
assert!(bits <= 128);
let max_value = !0u128 >> (128 - bits);
let size = value.size(cx);
assert!(size.bits() <= 128);
let max_value = size.unsigned_max();
if count > max_value {
return None;