| 35,14 → 35,14 |
|---|
| #ifndef KERN_mips32_ATOMIC_H_ |
| #define KERN_mips32_ATOMIC_H_ |
| |
| #define atomic_inc(x) ((void) atomic_add(x, 1)) |
| #define atomic_dec(x) ((void) atomic_add(x, -1)) |
| #define atomic_inc(x) ((void) atomic_add(x, 1)) |
| #define atomic_dec(x) ((void) atomic_add(x, -1)) |
| |
| #define atomic_postinc(x) (atomic_add(x, 1) - 1) |
| #define atomic_postdec(x) (atomic_add(x, -1) + 1) |
| #define atomic_postinc(x) (atomic_add(x, 1) - 1) |
| #define atomic_postdec(x) (atomic_add(x, -1) + 1) |
| |
| #define atomic_preinc(x) atomic_add(x, 1) |
| #define atomic_predec(x) atomic_add(x, -1) |
| #define atomic_preinc(x) atomic_add(x, 1) |
| #define atomic_predec(x) atomic_add(x, -1) |
| |
| /* Atomic addition of immediate value. |
| * |
| 54,19 → 54,37 |
|---|
| static inline long atomic_add(atomic_t *val, int i) |
| { |
| long tmp, v; |
| |
| |
| asm volatile ( |
| "1:\n" |
| " ll %0, %1\n" |
| " addu %0, %0, %3\n" /* same as addi, but never traps on overflow */ |
| " move %2, %0\n" |
| " 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 */ |
| " beq %0, %4, 1b\n" /* if the atomic operation failed, try again */ |
| " nop\n" |
| : "=&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; |
| } |
| |