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(_test_and_set): Use branch likely.

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This commit is contained in:
Ulrich Drepper 2002-02-03 02:25:17 +00:00
parent f295ff3212
commit d7d16bb3ea
1 changed files with 8 additions and 5 deletions
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13
sysdeps/unix/sysv/linux/mips/sys/tas.h
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@ -42,16 +42,19 @@ _test_and_set (int *p, int v) __THROW
int r, t;
__asm__ __volatile__
("1:\n\t"
"ll %0,%3\n\t"
("/* Inline test and set */\n\t"
"ll %0,%3\n"
"1:\n\t"
".set push\n\t"
".set noreorder\n\t"
"beq %0,%4,2f\n\t"
" move %1,%4\n\t"
".set pop\n\t"
"sc %1,%2\n\t"
"beqz %1,1b\n"
"2:\n"
"beqzl %1,1b\n\t"
" ll %0,%3\n\t"
".set pop\n"
"2:\n\t"
"/* End test and set */"
: "=&r" (r), "=&r" (t), "=m" (*p)
: "m" (*p), "r" (v)
: "memory");