mirror of git://git.musl-libc.org/musl
16 lines
311 B
C
16 lines
311 B
C
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#define a_cas a_cas
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static inline int a_cas(volatile int *p, int t, int s)
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{
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__asm__("\n"
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" sync\n"
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"1: lwarx %0, 0, %4\n"
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" cmpw %0, %2\n"
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" bne 1f\n"
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" stwcx. %3, 0, %4\n"
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" bne- 1b\n"
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" isync\n"
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"1: \n"
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: "=&r"(t), "+m"(*p) : "r"(t), "r"(s), "r"(p) : "cc", "memory" );
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return t;
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}
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