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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 17:35:05 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 17:39:31 +0000 |
| commit | 85c675d0d09a45a135bddd15d7b385f8758c32fb (patch) | |
| tree | 76267dbc9b9a130337be3640948fe397b04ac629 /arch/alpha/include/asm/bitops.h | |
| parent | Adding upstream version 6.6.15. (diff) | |
| download | linux-85c675d0d09a45a135bddd15d7b385f8758c32fb.tar.xz linux-85c675d0d09a45a135bddd15d7b385f8758c32fb.zip | |
Adding upstream version 6.7.7.upstream/6.7.7
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/alpha/include/asm/bitops.h')
| -rw-r--r-- | arch/alpha/include/asm/bitops.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/alpha/include/asm/bitops.h b/arch/alpha/include/asm/bitops.h index bafb1c1f0f..3e33621922 100644 --- a/arch/alpha/include/asm/bitops.h +++ b/arch/alpha/include/asm/bitops.h @@ -286,6 +286,26 @@ arch___test_and_change_bit(unsigned long nr, volatile unsigned long *addr) #define arch_test_bit generic_test_bit #define arch_test_bit_acquire generic_test_bit_acquire +static inline bool xor_unlock_is_negative_byte(unsigned long mask, + volatile unsigned long *p) +{ + unsigned long temp, old; + + __asm__ __volatile__( + "1: ldl_l %0,%4\n" + " mov %0,%2\n" + " xor %0,%3,%0\n" + " stl_c %0,%1\n" + " beq %0,2f\n" + ".subsection 2\n" + "2: br 1b\n" + ".previous" + :"=&r" (temp), "=m" (*p), "=&r" (old) + :"Ir" (mask), "m" (*p)); + + return (old & BIT(7)) != 0; +} + /* * ffz = Find First Zero in word. Undefined if no zero exists, * so code should check against ~0UL first.. |