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LibJS: Add fast paths for bitwise ops on 2x Int32 JS::Value

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~9% speed-up on Kraken/stanford-crypto-aes.js :^)
This commit is contained in:
Andreas Kling 2023-07-01 15:08:37 +02:00 • committed by Linus Groh
parent 1efe4b58aa
commit 0cb9c9e81e
2 changed files with 35 additions and 11 deletions
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22
Userland/Libraries/LibJS/Runtime/Value.h
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@ -428,6 +428,17 @@ public:
#endif
}
// A double is any Value which does not have the full exponent and top mantissa bit set or has
// exactly only those bits set.
bool is_double() const { return (m_value.encoded & CANON_NAN_BITS) != CANON_NAN_BITS || (m_value.encoded == CANON_NAN_BITS); }
bool is_int32() const { return m_value.tag == INT32_TAG; }
i32 as_i32() const
{
VERIFY(is_int32());
return static_cast<i32>(m_value.encoded & 0xFFFFFFFF);
}
private:
Value(u64 tag, u64 val)
{
@ -459,17 +470,6 @@ private:
}
}
// A double is any Value which does not have the full exponent and top mantissa bit set or has
// exactly only those bits set.
bool is_double() const { return (m_value.encoded & CANON_NAN_BITS) != CANON_NAN_BITS || (m_value.encoded == CANON_NAN_BITS); }
bool is_int32() const { return m_value.tag == INT32_TAG; }
i32 as_i32() const
{
VERIFY(is_int32());
return static_cast<i32>(m_value.encoded & 0xFFFFFFFF);
}
template<typename PointerType>
PointerType* extract_pointer() const
{