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| author | Rich Felker <dalias@aerifal.cx> | 2012-07-12 23:18:03 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2012-07-12 23:18:03 -0400 |
| commit | 48d20136b033da456f7bd98dfc9c384b39891d5f (patch) | |
| tree | c6327537d28d08afa8c499a976a744883ae06be9 | |
| parent | 532cd3a7171667d3f18e03c7c8d9d6f7846551e4 (diff) | |
| download | musl-48d20136b033da456f7bd98dfc9c384b39891d5f.tar.gz musl-48d20136b033da456f7bd98dfc9c384b39891d5f.tar.xz musl-48d20136b033da456f7bd98dfc9c384b39891d5f.zip | |
fix broken mips a_fetch_add
sc was overwriting the result
| -rw-r--r-- | arch/mips/atomic.h | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/arch/mips/atomic.h b/arch/mips/atomic.h index 33e53d4e..a09f98df 100644 --- a/arch/mips/atomic.h +++ b/arch/mips/atomic.h @@ -70,19 +70,19 @@ static inline int a_swap(volatile int *x, int v) static inline int a_fetch_add(volatile int *x, int v) { - int new; + int old, dummy; __asm__ __volatile__( ".set push\n" ".set noreorder\n" - "1: ll %0, 0(%1)\n" - " addu %0, %0, %2\n" - " sc %0, 0(%1)\n" - " beq %0, $0, 1b\n" + "1: ll %0, 0(%2)\n" + " addu %1, %0, %3\n" + " sc %1, 0(%2)\n" + " beq %1, $0, 1b\n" " nop\n" "1: \n" ".set pop\n" - : "=&r"(new) : "r"(x), "r"(v) : "memory" ); - return new-v; + : "=&r"(old), "=&r"(dummy) : "r"(x), "r"(v) : "memory" ); + return old; } static inline void a_inc(volatile int *x) |