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xxhash: match output against the original xxhash32

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Change the order in which we extract a/b and c/d to
match the output of the upstream xxhash32.

Tested with:
  https://github.com/cota/xxhash/tree/qemu

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Emilio G. Cota 2018-11-23 17:41:43 -05:00 committed by Richard Henderson
parent fe656e3185
commit b7c2cd08a6
1 changed files with 4 additions and 4 deletions
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8
include/qemu/xxhash.h
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@ -55,10 +55,10 @@ qemu_xxhash7(uint64_t ab, uint64_t cd, uint32_t e, uint32_t f, uint32_t g)
uint32_t v2 = QEMU_XXHASH_SEED + PRIME32_2; uint32_t v2 = QEMU_XXHASH_SEED + PRIME32_2;
uint32_t v3 = QEMU_XXHASH_SEED + 0; uint32_t v3 = QEMU_XXHASH_SEED + 0;
uint32_t v4 = QEMU_XXHASH_SEED - PRIME32_1; uint32_t v4 = QEMU_XXHASH_SEED - PRIME32_1;
uint32_t a = ab >> 32; uint32_t a = ab;
uint32_t b = ab; uint32_t b = ab >> 32;
uint32_t c = cd >> 32; uint32_t c = cd;
uint32_t d = cd; uint32_t d = cd >> 32;
uint32_t h32; uint32_t h32;
v1 += a * PRIME32_2; v1 += a * PRIME32_2;