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Use UINT128_T support flag from configure

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Current check for __uint128_t in hash.c is not valid, since it ignores
compilers other than gcc. We hit this on lcc on e2k platform.

Configure script properly checks from 128-bit data types support and
sets HAVE_UINT128_T accordingly. This approach is already used within
ruby at bignum.c, random.c, etc.

Probably hash.c is an overlooked remnant of old days. This patch fixes
this.

[ruby-core:84438] [Bug #14231] [Fix GH-1781]
From: Andrew Savchenko <bircoph@altlinux.org>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61471 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2017-12-25 12:32:09 +00:00
parent 135f24c06a
commit 8880af9a3b
1 changed files with 1 additions and 1 deletions
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2
hash.c
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@ -230,7 +230,7 @@ static const uint64_t prime2 = ((uint64_t)0xcdb32970 << 32) | 0x830fcaa1;
static inline uint64_t static inline uint64_t
mult_and_mix(uint64_t m1, uint64_t m2) mult_and_mix(uint64_t m1, uint64_t m2)
{ {
#if defined(__GNUC__) && UINT_MAX != ULONG_MAX #if defined HAVE_UINT128_T
__uint128_t r = (__uint128_t) m1 * (__uint128_t) m2; __uint128_t r = (__uint128_t) m1 * (__uint128_t) m2;
return (uint64_t) (r >> 64) ^ (uint64_t) r; return (uint64_t) (r >> 64) ^ (uint64_t) r;
#else #else