| Rich Felker | 5972c4a | 2016-04-18 05:19:13 +0000 | [diff] [blame] | 1 | #if __mips_isa_rev < 6 |
| 2 | #define LLSC_M "m" |
| 3 | #else |
| 4 | #define LLSC_M "ZC" |
| 5 | #endif |
| 6 | |
| 7 | #define a_ll a_ll |
| 8 | static inline int a_ll(volatile int *p) |
| 9 | { |
| 10 | int v; |
| 11 | #if __mips < 2 |
| 12 | __asm__ __volatile__ ( |
| 13 | ".set push ; .set mips2\n\t" |
| 14 | "ll %0, %1" |
| 15 | "\n\t.set pop" |
| 16 | : "=r"(v) : "m"(*p)); |
| 17 | #else |
| 18 | __asm__ __volatile__ ( |
| 19 | "ll %0, %1" |
| 20 | : "=r"(v) : LLSC_M(*p)); |
| 21 | #endif |
| 22 | return v; |
| 23 | } |
| 24 | |
| 25 | #define a_sc a_sc |
| 26 | static inline int a_sc(volatile int *p, int v) |
| 27 | { |
| 28 | int r; |
| 29 | #if __mips < 2 |
| 30 | __asm__ __volatile__ ( |
| 31 | ".set push ; .set mips2\n\t" |
| 32 | "sc %0, %1" |
| 33 | "\n\t.set pop" |
| 34 | : "=r"(r), "=m"(*p) : "0"(v) : "memory"); |
| 35 | #else |
| 36 | __asm__ __volatile__ ( |
| 37 | "sc %0, %1" |
| 38 | : "=r"(r), "="LLSC_M(*p) : "0"(v) : "memory"); |
| 39 | #endif |
| 40 | return r; |
| 41 | } |
| 42 | |
| 43 | #define a_barrier a_barrier |
| 44 | static inline void a_barrier() |
| 45 | { |
| 46 | __asm__ __volatile__ ("sync" : : : "memory"); |
| 47 | } |
| 48 | |
| 49 | #define a_pre_llsc a_barrier |
| 50 | #define a_post_llsc a_barrier |
| 51 | |
| 52 | #undef LLSC_M |