diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/qemu/host-utils.h | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/include/qemu/host-utils.h b/include/qemu/host-utils.h index f0dd850e1f..0f688c1c00 100644 --- a/include/qemu/host-utils.h +++ b/include/qemu/host-utils.h @@ -28,22 +28,21 @@ #include "qemu/compiler.h" /* QEMU_GNUC_PREREQ */ #include <limits.h> -#if defined(__x86_64__) -#define __HAVE_FAST_MULU64__ +#ifdef CONFIG_INT128 static inline void mulu64(uint64_t *plow, uint64_t *phigh, uint64_t a, uint64_t b) { - __asm__ ("mul %0\n\t" - : "=d" (*phigh), "=a" (*plow) - : "a" (a), "0" (b)); + __uint128_t r = (__uint128_t)a * b; + *plow = r; + *phigh = r >> 64; } -#define __HAVE_FAST_MULS64__ + static inline void muls64(uint64_t *plow, uint64_t *phigh, int64_t a, int64_t b) { - __asm__ ("imul %0\n\t" - : "=d" (*phigh), "=a" (*plow) - : "a" (a), "0" (b)); + __int128_t r = (__int128_t)a * b; + *plow = r; + *phigh = r >> 64; } #else void muls64(uint64_t *phigh, uint64_t *plow, int64_t a, int64_t b); |