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remove gratuitous temp vars, casts, and suffixes in x86_64 atomic.h

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aside from general cleanup, this should allow the identical atomic.h
file to be used for the upcoming x32 port.
This commit is contained in:
Rich Felker 2014-01-11 19:37:09 -05:00
parent f29e834d98
commit 311736516e
1 changed files with 11 additions and 13 deletions
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24
arch/x86_64/atomic.h
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@ -5,28 +5,26 @@
static inline int a_ctz_64(uint64_t x)
{
long r;
__asm__( "bsf %1,%0" : "=r"(r) : "r"(x) );
return r;
__asm__( "bsf %1,%0" : "=r"(x) : "r"(x) );
return x;
}
static inline int a_ctz_l(unsigned long x)
{
long r;
__asm__( "bsf %1,%0" : "=r"(r) : "r"(x) );
return r;
__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 ; andq %1, %0"
: "=m"(*(long *)p) : "r"(v) : "memory" );
__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 ; orq %1, %0"
: "=m"(*(long *)p) : "r"(v) : "memory" );
__asm__( "lock ; or %1, %0"
: "=m"(*p) : "r"(v) : "memory" );
}
static inline void a_store_l(volatile void *p, long x)
@ -56,7 +54,7 @@ static inline long a_cas_l(volatile void *p, long t, long s)
static inline int a_cas(volatile int *p, int t, int s)
{
__asm__( "lock ; cmpxchgl %3, %1"
__asm__( "lock ; cmpxchg %3, %1"
: "=a"(t), "=m"(*p) : "a"(t), "r"(s) : "memory" );
return t;
}
@ -74,13 +72,13 @@ static inline long a_swap_l(volatile void *x, long v)
static inline void a_or(volatile void *p, int v)
{
__asm__( "lock ; orl %1, %0"
__asm__( "lock ; or %1, %0"
: "=m"(*(int *)p) : "r"(v) : "memory" );
}
static inline void a_and(volatile void *p, int v)
{
__asm__( "lock ; andl %1, %0"
__asm__( "lock ; and %1, %0"
: "=m"(*(int *)p) : "r"(v) : "memory" );
}