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| author | Luis Pires <luis.pires@eldorado.org.br> | 2021-09-10 08:26:03 -0300 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2021-09-29 19:37:38 +1000 |
| commit | 06c0259a086f0f4ddd57a14ba811bba0b9e45130 (patch) | |
| tree | 35bd44452d7511b0f06fa3152ad67b35738a4216 | |
| parent | 6b54a31bf7b403672a798b6443b1930ae6c74dea (diff) | |
| download | focaccia-qemu-06c0259a086f0f4ddd57a14ba811bba0b9e45130.tar.gz focaccia-qemu-06c0259a086f0f4ddd57a14ba811bba0b9e45130.zip | |
host-utils: Fix overflow detection in divu128()
The previous code didn't detect overflows if the high 64-bit of the dividend were equal to the 64-bit divisor. In that case, 64 bits wouldn't be enough to hold the quotient. Signed-off-by: Luis Pires <luis.pires@eldorado.org.br> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20210910112624.72748-2-luis.pires@eldorado.org.br> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
| -rw-r--r-- | util/host-utils.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/util/host-utils.c b/util/host-utils.c index 7b9322071d..a789a11b46 100644 --- a/util/host-utils.c +++ b/util/host-utils.c @@ -102,7 +102,7 @@ int divu128(uint64_t *plow, uint64_t *phigh, uint64_t divisor) *plow = dlo / divisor; *phigh = dlo % divisor; return 0; - } else if (dhi > divisor) { + } else if (dhi >= divisor) { return 1; } else { |