diff options
Diffstat (limited to 'arch/mips/atomic_arch.h')
-rw-r--r-- | arch/mips/atomic_arch.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/mips/atomic_arch.h b/arch/mips/atomic_arch.h new file mode 100644 index 00000000..b111c894 --- /dev/null +++ b/arch/mips/atomic_arch.h @@ -0,0 +1,61 @@ +#define a_cas a_cas +static inline int a_cas(volatile int *p, int t, int s) +{ + int dummy; + __asm__ __volatile__( + ".set push\n" + ".set mips2\n" + ".set noreorder\n" + " sync\n" + "1: ll %0, %2\n" + " bne %0, %3, 1f\n" + " addu %1, %4, $0\n" + " sc %1, %2\n" + " beq %1, $0, 1b\n" + " nop\n" + " sync\n" + "1: \n" + ".set pop\n" + : "=&r"(t), "=&r"(dummy), "+m"(*p) : "r"(t), "r"(s) : "memory" ); + return t; +} + +#define a_swap a_swap +static inline int a_swap(volatile int *x, int v) +{ + int old, dummy; + __asm__ __volatile__( + ".set push\n" + ".set mips2\n" + ".set noreorder\n" + " sync\n" + "1: ll %0, %2\n" + " addu %1, %3, $0\n" + " sc %1, %2\n" + " beq %1, $0, 1b\n" + " nop\n" + " sync\n" + ".set pop\n" + : "=&r"(old), "=&r"(dummy), "+m"(*x) : "r"(v) : "memory" ); + return old; +} + +#define a_fetch_add a_fetch_add +static inline int a_fetch_add(volatile int *x, int v) +{ + int old, dummy; + __asm__ __volatile__( + ".set push\n" + ".set mips2\n" + ".set noreorder\n" + " sync\n" + "1: ll %0, %2\n" + " addu %1, %0, %3\n" + " sc %1, %2\n" + " beq %1, $0, 1b\n" + " nop\n" + " sync\n" + ".set pop\n" + : "=&r"(old), "=&r"(dummy), "+m"(*x) : "r"(v) : "memory" ); + return old; +} |