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author | Rich Felker <dalias@aerifal.cx> | 2016-01-21 19:08:54 +0000 |
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committer | Rich Felker <dalias@aerifal.cx> | 2016-01-21 19:08:54 +0000 |
commit | 1315596b510189b5159e742110b504177bdd4932 (patch) | |
tree | 27159b7b95b944671454b11f36ee13308241f4b5 /arch/x86_64/atomic.h | |
parent | ce3e24eaae91e7a90f87eb7f1edea8df5942de11 (diff) | |
download | musl-1315596b510189b5159e742110b504177bdd4932.tar.gz musl-1315596b510189b5159e742110b504177bdd4932.tar.bz2 musl-1315596b510189b5159e742110b504177bdd4932.tar.xz musl-1315596b510189b5159e742110b504177bdd4932.zip |
refactor internal atomic.h
rather than having each arch provide its own atomic.h, there is a new
shared atomic.h in src/internal which pulls arch-specific definitions
from arc/$(ARCH)/atomic_arch.h. the latter can be extremely minimal,
defining only a_cas or new ll/sc type primitives which the shared
atomic.h will use to construct everything else.
this commit avoids making heavy changes to the individual archs'
atomic implementations. definitions which are identical or
near-identical to what the new shared atomic.h would produce have been
removed, but otherwise the changes made are just hooking up the
arch-specific files to the new infrastructure. major changes to take
advantage of the new system will come in subsequent commits.
Diffstat (limited to 'arch/x86_64/atomic.h')
-rw-r--r-- | arch/x86_64/atomic.h | 105 |
1 files changed, 0 insertions, 105 deletions
diff --git a/arch/x86_64/atomic.h b/arch/x86_64/atomic.h deleted file mode 100644 index 7690183d..00000000 --- a/arch/x86_64/atomic.h +++ /dev/null @@ -1,105 +0,0 @@ -#ifndef _INTERNAL_ATOMIC_H -#define _INTERNAL_ATOMIC_H - -#include <stdint.h> - -static inline int a_ctz_64(uint64_t x) -{ - __asm__( "bsf %1,%0" : "=r"(x) : "r"(x) ); - return x; -} - -static inline int a_ctz_l(unsigned long x) -{ - __asm__( "bsf %1,%0" : "=r"(x) : "r"(x) ); - return x; -} - -static inline void a_and_64(volatile uint64_t *p, uint64_t v) -{ - __asm__( "lock ; and %1, %0" - : "=m"(*p) : "r"(v) : "memory" ); -} - -static inline void a_or_64(volatile uint64_t *p, uint64_t v) -{ - __asm__( "lock ; or %1, %0" - : "=m"(*p) : "r"(v) : "memory" ); -} - -static inline void a_or_l(volatile void *p, long v) -{ - __asm__( "lock ; or %1, %0" - : "=m"(*(long *)p) : "r"(v) : "memory" ); -} - -static inline void *a_cas_p(volatile void *p, void *t, void *s) -{ - __asm__( "lock ; cmpxchg %3, %1" - : "=a"(t), "=m"(*(long *)p) : "a"(t), "r"(s) : "memory" ); - return t; -} - -static inline int a_cas(volatile int *p, int t, int s) -{ - __asm__( "lock ; cmpxchg %3, %1" - : "=a"(t), "=m"(*p) : "a"(t), "r"(s) : "memory" ); - return t; -} - -static inline void a_or(volatile int *p, int v) -{ - __asm__( "lock ; or %1, %0" - : "=m"(*p) : "r"(v) : "memory" ); -} - -static inline void a_and(volatile int *p, int v) -{ - __asm__( "lock ; and %1, %0" - : "=m"(*p) : "r"(v) : "memory" ); -} - -static inline int a_swap(volatile int *x, int v) -{ - __asm__( "xchg %0, %1" : "=r"(v), "=m"(*x) : "0"(v) : "memory" ); - return v; -} - -static inline int a_fetch_add(volatile int *x, int v) -{ - __asm__( "lock ; xadd %0, %1" : "=r"(v), "=m"(*x) : "0"(v) : "memory" ); - return v; -} - -static inline void a_inc(volatile int *x) -{ - __asm__( "lock ; incl %0" : "=m"(*x) : "m"(*x) : "memory" ); -} - -static inline void a_dec(volatile int *x) -{ - __asm__( "lock ; decl %0" : "=m"(*x) : "m"(*x) : "memory" ); -} - -static inline void a_store(volatile int *p, int x) -{ - __asm__( "mov %1, %0 ; lock ; orl $0,(%%rsp)" : "=m"(*p) : "r"(x) : "memory" ); -} - -static inline void a_spin() -{ - __asm__ __volatile__( "pause" : : : "memory" ); -} - -static inline void a_barrier() -{ - __asm__ __volatile__( "" : : : "memory" ); -} - -static inline void a_crash() -{ - __asm__ __volatile__( "hlt" : : : "memory" ); -} - - -#endif |