project-base/server-skynet-source-3rd-jemalloc
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Remove unnecessary xchg* lock prefixes.

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This commit is contained in:
Jason Evans 2015-02-10 16:05:52 -08:00
parent 9e561e8d3f
commit 051eae8cc5
1 changed files with 2 additions and 2 deletions
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4
include/jemalloc/internal/atomic.h
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@ -119,7 +119,7 @@ atomic_write_uint64(uint64_t *p, uint64_t x)
{
asm volatile (
"lock; xchgq %1, %0;"
"xchgq %1, %0;" /* Lock is implied by xchgq. */
: "=m" (*p), "+r" (x) /* Outputs. */
: "m" (*p) /* Inputs. */
: "memory" /* Clobbers. */
@ -343,7 +343,7 @@ atomic_write_uint32(uint32_t *p, uint32_t x)
{
asm volatile (
"lock; xchgl %1, %0;"
"xchgl %1, %0;" /* Lock is implied by xchgl. */
: "=m" (*p), "+r" (x) /* Outputs. */
: "m" (*p) /* Inputs. */
: "memory" /* Clobbers. */