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Remove ".set noreorder" et al; GCC already emits them.

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Fix register constraints in asms.
Set RTN in C, not asm.
This commit is contained in:
Roland McGrath 1994-12-09 05:05:05 +00:00
parent 157aaa4ee6
commit 946b6e002a
1 changed files with 7 additions and 10 deletions
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17
sysdeps/mach/alpha/machine-lock.h
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@ -38,9 +38,7 @@ typedef __volatile long int __spin_lock_t;
_EXTERN_INLINE void
__spin_unlock (__spin_lock_t *__lock)
{
__asm__ __volatile__ (".set noreorder\n"
"mb; stq $31, %0; mb\n"
".set reorder"
__asm__ __volatile__ ("mb; stq $31, %0; mb"
: "=m" (__lock));
}
@ -53,18 +51,17 @@ __spin_try_lock (register __spin_lock_t *__lock)
do
{
__asm__ __volatile__ (".set noreorder\n"
/* %0 is TMP, %1 is RTN, %2 is LOCK. */
"mb; ldq_l %0,%2\n" /* Load lock into TMP. */
"or $31,2,%1\n" /* Locked value in RTN. */
".set reorder"
: "=r" (__tmp), "=r" (__rtn) : "m" (__lock));
__asm__ __volatile__ ("mb; ldq_l %0,%1" /* Load lock value into TMP. */
: "=r" (__tmp) : "m" (*__lock));
__rtn = 2; /* Load locked value into RTN. */
if (__tmp)
/* The lock is already taken. */
return 0;
/* The lock is not taken; try to get it now. */
__asm__ __volatile__ ("stq_c %0,%1" : "+r" (__rtn), "+m" (__lock));
__asm__ __volatile__ ("stq_c %0,%1"
: "=r" (__rtn), "=m" (*__lock)
: "0" (__rtn), "1" (*__lock));
/* RTN is clear if stq_c was interrupted; loop to try the lock again. */
} while (! __rtn);
/* RTN is now nonzero; we have the lock. */