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osdep: MSVC-compatible alignment macros

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Lioncash 2018-02-23 20:29:11 -05:00
parent 3456f0879e
commit fffa27d269
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1 changed files with 14 additions and 0 deletions
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14
qemu/include/qemu/osdep.h
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@ -147,6 +147,19 @@
/* Check if n is a multiple of m */
#define QEMU_IS_ALIGNED(n, m) (((n) % (m)) == 0)
/* Unfortunately MSVC compatibility means explicit casting */
#ifdef _MSC_VER
/* n-byte align pointer down */
#define QEMU_ALIGN_PTR_DOWN(p, n) \
(QEMU_ALIGN_DOWN((uintptr_t)(p), (n)))
/* n-byte align pointer up */
#define QEMU_ALIGN_PTR_UP(p, n) \
(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))
#else
/* n-byte align pointer down */
#define QEMU_ALIGN_PTR_DOWN(p, n) \
((typeof(p))QEMU_ALIGN_DOWN((uintptr_t)(p), (n)))
@ -157,6 +170,7 @@
/* Check if pointer p is n-bytes aligned */
#define QEMU_PTR_IS_ALIGNED(p, n) QEMU_IS_ALIGNED((uintptr_t)(p), (n))
#endif
#ifndef ROUND_UP
#define ROUND_UP(n,d) (((n) + (d) - 1) & -(d))