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Message-Id: <1435448915-28419-2-git-send-email-amonakov@ispras.ru>
Date: Sun, 28 Jun 2015 02:48:30 +0300
From: Alexander Monakov <amonakov@...ras.ru>
To: musl@...ts.openwall.com
Subject: [PATCH v2 1/6] dynlink.c: use a faster expression in gnu_hash
With -Os, GCC uses a multiply rather than a shift and addition for 'h*33'.
Use a more efficient expression explicitely.
---
src/ldso/dynlink.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/ldso/dynlink.c b/src/ldso/dynlink.c
index b77c6f6..0df81f2 100644
--- a/src/ldso/dynlink.c
+++ b/src/ldso/dynlink.c
@@ -156,7 +156,7 @@ static uint32_t gnu_hash(const char *s0)
const unsigned char *s = (void *)s0;
uint_fast32_t h = 5381;
for (; *s; s++)
- h = h*33 + *s;
+ h += h*32 + *s;
return h;
}
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