#if __mips_isa_rev < 6 #define LLSC_M "m" #else #define LLSC_M "ZC" #endif #define a_ll a_ll static inline int a_ll(volatile int *p) { int v; #if __mips < 2 __asm__ __volatile__ ( ".set push ; .set mips2\n\t" "ll %0, %1" "\n\t.set pop" : "=r"(v) : "m"(*p)); #else __asm__ __volatile__ ( "ll %0, %1" : "=r"(v) : LLSC_M(*p)); #endif return v; } #define a_sc a_sc static inline int a_sc(volatile int *p, int v) { int r; #if __mips < 2 __asm__ __volatile__ ( ".set push ; .set mips2\n\t" "sc %0, %1" "\n\t.set pop" : "=r"(r), "=m"(*p) : "0"(v) : "memory"); #else __asm__ __volatile__ ( "sc %0, %1" : "=r"(r), "="LLSC_M(*p) : "0"(v) : "memory"); #endif return r; } #define a_barrier a_barrier static inline void a_barrier() { #if __mips < 2 /* mips2 sync, but using too many directives causes * gcc not to inline it, so encode with .long instead. */ __asm__ __volatile__ (".long 0xf" : : : "memory"); #else __asm__ __volatile__ ("sync" : : : "memory"); #endif } #define a_pre_llsc a_barrier #define a_post_llsc a_barrier #undef LLSC_M