mirror of
git://git.musl-libc.org/musl
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53 lines
880 B
C
53 lines
880 B
C
#if __mips_isa_rev < 6
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#define LLSC_M "m"
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#else
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#define LLSC_M "ZC"
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#endif
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#define a_ll a_ll
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static inline int a_ll(volatile int *p)
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{
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int v;
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#if __mips < 2
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__asm__ __volatile__ (
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".set push ; .set mips2\n\t"
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"ll %0, %1"
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"\n\t.set pop"
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: "=r"(v) : "m"(*p));
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#else
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__asm__ __volatile__ (
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"ll %0, %1"
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: "=r"(v) : LLSC_M(*p));
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#endif
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return v;
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}
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#define a_sc a_sc
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static inline int a_sc(volatile int *p, int v)
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{
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int r;
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#if __mips < 2
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__asm__ __volatile__ (
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".set push ; .set mips2\n\t"
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"sc %0, %1"
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"\n\t.set pop"
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: "=r"(r), "=m"(*p) : "0"(v) : "memory");
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#else
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__asm__ __volatile__ (
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"sc %0, %1"
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: "=r"(r), "="LLSC_M(*p) : "0"(v) : "memory");
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#endif
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return r;
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}
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#define a_barrier a_barrier
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static inline void a_barrier()
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{
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__asm__ __volatile__ ("sync" : : : "memory");
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}
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#define a_pre_llsc a_barrier
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#define a_post_llsc a_barrier
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#undef LLSC_M
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