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add a utility macro for getting the bitwise ceiling. (e.i. the next power of 2)

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Quinn
2025-08-26 11:18:23 +02:00
parent e02f4091b8
commit 4e230ae856
1 changed files with 6 additions and 0 deletions
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src/util/util.h Normal file
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#pragma once
/* Acquires the next power of two of value `x`.
* Automatically determines the type (and therefore the width) of `x`.
* Explicitly cast `x` to a desired width, if necessary. */
#define bit_ceil(x) (1 << (sizeof(__typeof__(x)) * 8 - __builtin_clzg(((x) - !!(x)) | 1)))