| #define a_cas a_cas |
| static inline int a_cas(volatile int *p, int t, int s) |
| { |
| register int old, tmp; |
| __asm__ __volatile__ ( |
| " addi %0, r0, 0\n" |
| "1: lwx %0, %2, r0\n" |
| " rsubk %1, %0, %3\n" |
| " bnei %1, 1f\n" |
| " swx %4, %2, r0\n" |
| " addic %1, r0, 0\n" |
| " bnei %1, 1b\n" |
| "1: " |
| : "=&r"(old), "=&r"(tmp) |
| : "r"(p), "r"(t), "r"(s) |
| : "cc", "memory" ); |
| return old; |
| } |
| |
| #define a_swap a_swap |
| static inline int a_swap(volatile int *x, int v) |
| { |
| register int old, tmp; |
| __asm__ __volatile__ ( |
| " addi %0, r0, 0\n" |
| "1: lwx %0, %2, r0\n" |
| " swx %3, %2, r0\n" |
| " addic %1, r0, 0\n" |
| " bnei %1, 1b\n" |
| "1: " |
| : "=&r"(old), "=&r"(tmp) |
| : "r"(x), "r"(v) |
| : "cc", "memory" ); |
| return old; |
| } |
| |
| #define a_fetch_add a_fetch_add |
| static inline int a_fetch_add(volatile int *x, int v) |
| { |
| register int new, tmp; |
| __asm__ __volatile__ ( |
| " addi %0, r0, 0\n" |
| "1: lwx %0, %2, r0\n" |
| " addk %0, %0, %3\n" |
| " swx %0, %2, r0\n" |
| " addic %1, r0, 0\n" |
| " bnei %1, 1b\n" |
| "1: " |
| : "=&r"(new), "=&r"(tmp) |
| : "r"(x), "r"(v) |
| : "cc", "memory" ); |
| return new-v; |
| } |
