Let compiler do the job to optimise the function.
Signed-off-by: Frediano Ziglio <frediano.zig...@huawei.com>
---
include/qemu-common.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/qemu-common.h b/include/qemu-common.h
index f862214..f3033ae 100644
--- a/include/qemu-common.h
+++ b/include/qemu-common.h
@@ -370,6 +370,12 @@ static inline uint8_t from_bcd(uint8_t val)
}
/* compute with 96 bit intermediate result: (a*b)/c */
+#ifdef CONFIG_INT128
+static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
+{
+ return (__int128)a * b / c;
+}
+#else
static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
{
union {
@@ -392,6 +398,7 @@ static inline uint64_t muldiv64(uint64_t a, uint32_t b,
uint32_t c)
res.l.low = (((rh % c) << 32) + (rl & 0xffffffff)) / c;
return res.ll;
}
+#endif
/* Round number down to multiple */
#define QEMU_ALIGN_DOWN(n, m) ((n) / (m) * (m))
--
1.9.1
