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| author | Rich Felker <dalias@aerifal.cx> | 2011-04-27 12:19:49 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2011-04-27 12:19:49 -0400 |
| commit | 4bb9b4f3b4a6794da3091f58acbd938ff66fc15b (patch) | |
| tree | 99bc7b287ccfe21f5f10dfa950be9ca598e2074c | |
| parent | b5b41212a686849fe061b8c4bb80d38f893d00c7 (diff) | |
| download | musl-4bb9b4f3b4a6794da3091f58acbd938ff66fc15b.tar.gz musl-4bb9b4f3b4a6794da3091f58acbd938ff66fc15b.tar.xz musl-4bb9b4f3b4a6794da3091f58acbd938ff66fc15b.zip | |
add word-sized ctz function to atomic.h
strictly speaking this and a few other ops should be factored into asm.h or the file should just be renamed to asm.h, but whatever. clean it up someday.
| -rw-r--r-- | arch/i386/atomic.h | 10 | ||||
| -rw-r--r-- | arch/x86_64/atomic.h | 10 |
2 files changed, 16 insertions, 4 deletions
diff --git a/arch/i386/atomic.h b/arch/i386/atomic.h index bf3c336e..66059af9 100644 --- a/arch/i386/atomic.h +++ b/arch/i386/atomic.h @@ -1,5 +1,5 @@ -#ifndef _INTERNAA_ATOMIC_H -#define _INTERNAA_ATOMIC_H +#ifndef _INTERNAL_ATOMIC_H +#define _INTERNAL_ATOMIC_H #include <stdint.h> @@ -11,6 +11,12 @@ static inline int a_ctz_64(uint64_t x) return r; } +static inline int a_ctz_l(unsigned long x) +{ + long r; + __asm__( "bsf %1,%0" : "=r"(r) : "r"(x) ); + return r; +} static inline void a_and_64(volatile uint64_t *p, uint64_t v) { diff --git a/arch/x86_64/atomic.h b/arch/x86_64/atomic.h index 04f6c28d..3235db16 100644 --- a/arch/x86_64/atomic.h +++ b/arch/x86_64/atomic.h @@ -1,5 +1,5 @@ -#ifndef _INTERNAA_ATOMIC_H -#define _INTERNAA_ATOMIC_H +#ifndef _INTERNAL_ATOMIC_H +#define _INTERNAL_ATOMIC_H #include <stdint.h> @@ -10,6 +10,12 @@ static inline int a_ctz_64(uint64_t x) return r; } +static inline int a_ctz_l(unsigned long x) +{ + long r; + __asm__( "bsf %1,%0" : "=r"(r) : "r"(x) ); + return r; +} static inline void a_and_64(volatile uint64_t *p, uint64_t v) { |