diff options
| author | David Hildenbrand <david@redhat.com> | 2017-07-20 14:37:19 +0200 |
|---|---|---|
| committer | Cornelia Huck <cohuck@redhat.com> | 2017-07-25 09:17:42 +0200 |
| commit | 3d1cfc3c682ffe937526a31a4161735338558985 (patch) | |
| tree | 7942a3a362d5dc267932f554824f55b7aed4c796 /target/s390x/cpu_features.h | |
| parent | cc18f90762412c657a37a17809be9613ac7f0b00 (diff) | |
target/s390x: introduce (test|set)_be_bit
Using ordinary bitmap operations to set/test bits does not work properly
on architectures !s390x. Let's drop (test|set)_bit_inv and introduce
(test|set)_be_bit instead. These functions work on uint8_t array, not on
unsigned longs arrays and are for now only used in the context of
CPU features.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170720123721.12366-4-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'target/s390x/cpu_features.h')
| -rw-r--r-- | target/s390x/cpu_features.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/target/s390x/cpu_features.h b/target/s390x/cpu_features.h index 770435e0cc..e306aa7ab2 100644 --- a/target/s390x/cpu_features.h +++ b/target/s390x/cpu_features.h @@ -93,4 +93,12 @@ const S390FeatGroupDef *s390_feat_group_def(S390FeatGroup group); #define BE_BIT_NR(BIT) (BIT ^ (BITS_PER_LONG - 1)) +static inline void set_be_bit(unsigned int bit_nr, uint8_t *array) +{ + array[bit_nr / 8] |= 0x80 >> (bit_nr % 8); +} +static inline bool test_be_bit(unsigned int bit_nr, const uint8_t *array) +{ + return array[bit_nr / 8] & (0x80 >> (bit_nr % 8)); +} #endif /* TARGET_S390X_CPU_FEATURES_H */ |