| 58,18 → 58,36 |
|---|
| asm volatile ( |
| "1:\n" |
| " ll %0, %1\n" |
| " addiu %0, %0, %3\n" /* same as addi, but never traps on overflow */ |
| " addu %0, %0, %3\n" /* same as addi, but never traps on overflow */ |
| " move %2, %0\n" |
| " sc %0, %1\n" |
| " beq %0, %4, 1b\n" /* if the atomic operation failed, try again */ |
| " nop\n" |
| : "=r" (tmp), "=m" (val->count), "=r" (v) |
| : "i" (i), "i" (0) |
| : "=&r" (tmp), "+m" (val->count), "=&r" (v) |
| : "r" (i), "i" (0) |
| ); |
| |
| return v; |
| } |
| |
| static inline uint32_t test_and_set(atomic_t *val) { |
| uint32_t tmp, v; |
| |
| asm volatile ( |
| "1:\n" |
| " ll %2, %1\n" |
| " bnez %2, 2f\n" |
| " li %0, %3\n" |
| " sc %0, %1\n" |
| " beqz %0, 1b\n" |
| "2:\n" |
| : "=&r" (tmp), "+m" (val->count), "=&r" (v) |
| : "i" (1) |
| ); |
| |
| return v; |
| } |
| |
| #endif |
| |
| /** @} |