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| author | Sergey Fedorov <serge.fdrv@gmail.com> | 2016-04-22 19:08:44 +0300 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2016-05-12 14:06:40 -1000 |
| commit | 6b587d3cda48e7ba26de8d30bf0d8a7063970715 (patch) | |
| tree | ea8d42502dcc0e8f1d87004bef1d5865b786f2c2 | |
| parent | 18a60a76147569ca9e11b0607e50ce4012fe1aaa (diff) | |
| download | qemu-6b587d3cda48e7ba26de8d30bf0d8a7063970715.tar.gz | |
include/qemu/osdep.h: Add macros for pointer alignment
These macros provide a convenient way to n-byte align pointers up and
down and check if a pointer is n-byte aligned.
Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
Signed-off-by: Sergey Fedorov <sergey.fedorov@linaro.org>
Message-Id: <1461341333-19646-3-git-send-email-sergey.fedorov@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
| -rw-r--r-- | include/qemu/osdep.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index e3bc50b613..1e3221cbec 100644 --- a/include/qemu/osdep.h +++ b/include/qemu/osdep.h @@ -161,6 +161,17 @@ extern int daemon(int, int); /* Check if n is a multiple of m */ #define QEMU_IS_ALIGNED(n, m) (((n) % (m)) == 0) +/* n-byte align pointer down */ +#define QEMU_ALIGN_PTR_DOWN(p, n) \ + ((typeof(p))QEMU_ALIGN_DOWN((uintptr_t)(p), (n))) + +/* n-byte align pointer up */ +#define QEMU_ALIGN_PTR_UP(p, n) \ + ((typeof(p))QEMU_ALIGN_UP((uintptr_t)(p), (n))) + +/* Check if pointer p is n-bytes aligned */ +#define QEMU_PTR_IS_ALIGNED(p, n) QEMU_IS_ALIGNED((uintptr_t)(p), (n)) + #ifndef ROUND_UP #define ROUND_UP(n,d) (((n) + (d) - 1) & -(d)) #endif |