Mov muldiv64 to qemu-common.h (Thus unbreaking gus)
Signed-off-by: malc <av1474@comtv.ru>
diff --git a/qemu-common.h b/qemu-common.h
index 2fbc27f..d31f366 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -309,6 +309,30 @@
return ((val >> 4) * 10) + (val & 0x0f);
}
+/* compute with 96 bit intermediate result: (a*b)/c */
+static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
+{
+ union {
+ uint64_t ll;
+ struct {
+#ifdef HOST_WORDS_BIGENDIAN
+ uint32_t high, low;
+#else
+ uint32_t low, high;
+#endif
+ } l;
+ } u, res;
+ uint64_t rl, rh;
+
+ u.ll = a;
+ rl = (uint64_t)u.l.low * (uint64_t)b;
+ rh = (uint64_t)u.l.high * (uint64_t)b;
+ rh += (rl >> 32);
+ res.l.high = rh / c;
+ res.l.low = (((rh % c) << 32) + (rl & 0xffffffff)) / c;
+ return res.ll;
+}
+
#include "module.h"
#endif
