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Bug 923328 - Ionmonkey: fix float32 hash function. r=terrence

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This commit is contained in:
Douglas Crosher 2013-10-03 10:11:18 +10:00
parent 78ce31c17b
commit c5c8a5b58e
1 changed files with 13 additions and 0 deletions
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13
js/public/HashTable.h
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@ -575,6 +575,19 @@ struct DefaultHasher<double>
}
};
template <>
struct DefaultHasher<float>
{
typedef float Lookup;
static HashNumber hash(float f) {
JS_STATIC_ASSERT(sizeof(HashNumber) == 4);
return HashNumber(mozilla::BitwiseCast<uint32_t>(f));
}
static bool match(float lhs, float rhs) {
return mozilla::BitwiseCast<uint32_t>(lhs) == mozilla::BitwiseCast<uint32_t>(rhs);
}
};
/*****************************************************************************/
// Both HashMap and HashSet are implemented by a single HashTable that is even