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Merge pull request #1581 from rose4096/dev

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Fix clang-cl compile with CONFIG_INT128 in qemu
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lazymio
2022-04-03 23:41:22 +02:00
committed by GitHub
parent 7e6d21d27c fc0d9a82a5
commit da561f6164
1 changed files with 23 additions and 1 deletions
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24
qemu/include/qemu/host-utils.h
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@@ -49,7 +49,29 @@ static inline void muls64(uint64_t *plow, uint64_t *phigh,
/* compute with 96 bit intermediate result: (a*b)/c */ /* compute with 96 bit intermediate result: (a*b)/c */
static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c) static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
{ {
return (__int128_t)a * b / c; #if defined(_MSC_VER) && defined(__clang__)
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;
#else
return (__int128_t)a * b / c;
#endif
} }
static inline int divu128(uint64_t *plow, uint64_t *phigh, uint64_t divisor) static inline int divu128(uint64_t *plow, uint64_t *phigh, uint64_t divisor)