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Rename _bsr/_bsf to bsr/bsf

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Now that these functions are behind _COSMO_SOURCE there's no reason for
having the ugly underscore anymore. To use these functions, you need to
pass -mcosmo to cosmocc.
This commit is contained in:
Justine Tunney 2024-03-04 17:33:26 -08:00
parent a6baba1b07
commit 8bfd56b59e
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GPG key ID: BE714B4575D6E328
53 changed files with 110 additions and 93 deletions
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6
libc/intrin/bsrl.c
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@ -29,7 +29,7 @@ static const char kDebruijn[64] = {
* Returns binary logarithm of 𝑥.
*
* ctz(𝑥) 31^clz(𝑥) clz(𝑥)
* uint32 𝑥 _bsf(𝑥) tzcnt(𝑥) ffs(𝑥) _bsr(𝑥) lzcnt(𝑥)
* uint32 𝑥 bsf(𝑥) tzcnt(𝑥) ffs(𝑥) bsr(𝑥) lzcnt(𝑥)
* 0x00000000 wut 32 0 wut 32
* 0x00000001 0 0 1 0 31
* 0x80000001 0 0 1 31 0
@ -42,7 +42,7 @@ static const char kDebruijn[64] = {
* @param x is a 64-bit integer
* @return number in range 0..63 or undefined if 𝑥 is 0
*/
int(_bsrl)(long x) {
int(bsrl)(long x) {
x |= x >> 1;
x |= x >> 2;
x |= x >> 4;
@ -52,4 +52,4 @@ int(_bsrl)(long x) {
return kDebruijn[(x * 0x03f79d71b4cb0a89ull) >> 58];
}
__weak_reference(_bsrl, _bsrll);
__weak_reference(bsrl, bsrll);