diff options
Diffstat (limited to 'sysdeps/mips')
| -rw-r--r-- | sysdeps/mips/atomicity.h | 45 |
1 files changed, 9 insertions, 36 deletions
diff --git a/sysdeps/mips/atomicity.h b/sysdeps/mips/atomicity.h index b4b7b64dd0..bccacd9c90 100644 --- a/sysdeps/mips/atomicity.h +++ b/sysdeps/mips/atomicity.h @@ -20,11 +20,8 @@ #ifndef _MIPS_ATOMICITY_H #define _MIPS_ATOMICITY_H 1 -#include <sgidefs.h> #include <inttypes.h> -#if (_MIPS_ISA >= _MIPS_ISA_MIPS2) - static inline int __attribute__ ((unused)) exchange_and_add (volatile uint32_t *mem, int val) @@ -34,9 +31,12 @@ exchange_and_add (volatile uint32_t *mem, int val) __asm__ __volatile__ ("/* Inline exchange & add */\n" "1:\n\t" + ".set push\n\t" + ".set mips2\n\t" "ll %0,%3\n\t" "addu %1,%4,%0\n\t" "sc %1,%2\n\t" + ".set pop\n\t" "beqz %1,1b\n\t" "/* End exchange & add */" : "=&r"(result), "=&r"(tmp), "=m"(*mem) @@ -55,9 +55,12 @@ atomic_add (volatile uint32_t *mem, int val) __asm__ __volatile__ ("/* Inline atomic add */\n" "1:\n\t" + ".set push\n\t" + ".set mips2\n\t" "ll %0,%2\n\t" "addu %0,%3,%0\n\t" "sc %0,%1\n\t" + ".set pop\n\t" "beqz %0,1b\n\t" "/* End atomic add */" : "=&r"(result), "=m"(*mem) @@ -74,11 +77,14 @@ compare_and_swap (volatile long int *p, long int oldval, long int newval) __asm__ __volatile__ ("/* Inline compare & swap */\n" "1:\n\t" + ".set push\n\t" + ".set mips2\n\t" "ll %1,%5\n\t" "move %0,$0\n\t" "bne %1,%3,2f\n\t" "move %0,%4\n\t" "sc %0,%2\n\t" + ".set pop\n\t" "beqz %0,1b\n" "2:\n\t" "/* End compare & swap */" @@ -89,37 +95,4 @@ compare_and_swap (volatile long int *p, long int oldval, long int newval) return ret; } -#else /* (_MIPS_ISA >= _MIPS_ISA_MIPS2) */ - -#warning MIPS I atomicity functions are not atomic - -static inline int -__attribute__ ((unused)) -exchange_and_add (volatile uint32_t *mem, int val) -{ - int result = *mem; - *mem += val; - return result; -} - -static inline void -__attribute__ ((unused)) -atomic_add (volatile uint32_t *mem, int val) -{ - *mem += val; -} - -static inline int -__attribute__ ((unused)) -compare_and_swap (volatile long int *p, long int oldval, long int newval) -{ - if (*p != oldval) - return 0; - - *p = newval; - return 1; -} - -#endif /* !(_MIPS_ISA >= _MIPS_ISA_MIPS2) */ - #endif /* atomicity.h */ |