diff options
Diffstat (limited to 'linuxthreads/sysdeps/mips/pspinlock.c')
| -rw-r--r-- | linuxthreads/sysdeps/mips/pspinlock.c | 49 |
1 files changed, 32 insertions, 17 deletions
diff --git a/linuxthreads/sysdeps/mips/pspinlock.c b/linuxthreads/sysdeps/mips/pspinlock.c index 906fb4ae60..7df3040bda 100644 --- a/linuxthreads/sysdeps/mips/pspinlock.c +++ b/linuxthreads/sysdeps/mips/pspinlock.c @@ -19,8 +19,12 @@ #include <errno.h> #include <pthread.h> +#include <sgidefs.h> +#include <sys/tas.h> +#if (_MIPS_ISA >= _MIPS_ISA_MIPS2) + /* This implementation is similar to the one used in the Linux kernel. */ int __pthread_spin_lock (pthread_spinlock_t *lock) @@ -28,22 +32,34 @@ __pthread_spin_lock (pthread_spinlock_t *lock) unsigned int tmp; asm volatile - (".set\tnoreorder\t\t\t# spin_lock\n" - ".set\tpush\n" - ".set\tmips2\n" - "1:\tll\t%1, %2\n\t" - "bnez\t%1, 1b\n\t" - " li\t%1, 1\n\t" - "sc\t%1, %0\n\t" - "beqz\t%1, 1b\n\t" - ".set\tpop\n" - ".set\treorder" - : "=o" (*lock), "=&r" (tmp) - : "o" (*lock) + ("\t\t\t# spin_lock\n\t" + "1:\n\t" + "ll %1,%2\n\t" + ".set push\n\t" + ".set noreorder\n\t" + "bnez %1,1b\n\t" + " li %1,1\n\t" + ".set pop\n\t" + "sc %1,%0\n\t" + "beqz %1,1b" + : "=m" (*lock), "=&r" (tmp) + : "m" (*lock) : "memory"); return 0; } + +#else /* !(_MIPS_ISA >= _MIPS_ISA_MIPS2) */ + +int +__pthread_spin_lock (pthread_spinlock_t *lock) +{ + while (_test_and_set (lock, 1)); + return 0; +} + +#endif /* !(_MIPS_ISA >= _MIPS_ISA_MIPS2) */ + weak_alias (__pthread_spin_lock, pthread_spin_lock) @@ -60,11 +76,10 @@ int __pthread_spin_unlock (pthread_spinlock_t *lock) { asm volatile - (".set\tnoreorder\t\t\t# spin_unlock\n\t" - "sw\t$0, %0\n\t" - ".set\treorder" - : "=o" (*lock) - : "o" (*lock) + ("\t\t\t# spin_unlock\n\t" + "sw $0,%0" + : "=m" (*lock) + : : "memory"); return 0; } |