Function safe_arch::bit_lowest_set_mask_u32
source ยท pub fn bit_lowest_set_mask_u32(a: u32) -> u32
Available with target feature
bmi1
only.Expand description
Gets the mask of all bits up to and including the lowest set bit in a u32
.
If the input is 0, you get u32::MAX
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Formula:
(a - 1) ^ a
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Intrinsic:
_blsmsk_u32
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Assembly:
blsmsk r32, r32