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[PULL,32/32] xxhash: match output against the original xxhash32

Message ID 20181214031923.29527-34-richard.henderson@linaro.org
State New
Headers show
Series tcg patch queue | expand

Commit Message

Richard Henderson Dec. 14, 2018, 3:19 a.m. UTC 
From: "Emilio G. Cota" <cota@braap.org>


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>

---
 include/qemu/xxhash.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

-- 
2.17.2
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Patch

diff --git a/include/qemu/xxhash.h b/include/qemu/xxhash.h
index fe35dde328..076f1f6054 100644
--- a/include/qemu/xxhash.h
+++ b/include/qemu/xxhash.h
@@ -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 v3 = QEMU_XXHASH_SEED + 0;
     uint32_t v4 = QEMU_XXHASH_SEED - PRIME32_1;
-    uint32_t a = ab >> 32;
-    uint32_t b = ab;
-    uint32_t c = cd >> 32;
-    uint32_t d = cd;
+    uint32_t a = ab;
+    uint32_t b = ab >> 32;
+    uint32_t c = cd;
+    uint32_t d = cd >> 32;
     uint32_t h32;
 
     v1 += a * PRIME32_2;