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Issue #1240 - Part 3a - Adjust mozilla::FloatingPoint<T>'s definition. So only the barest details are specified for floating-point encodings, with every other number, bit mask, &c. mathematically derived. Also add a bunch of documentation comments. https://bugzilla.mozilla.org/show_bug.cgi?id=1508725 Prerequisite for our V8 fast forward.

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This commit is contained in:
Brian Smith 2023-07-13 03:02:29 -05:00 • committed by roytam1
commit ddd49121a6
3 changed files with 77 additions and 37 deletions
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4
js/public/Value.h
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@ -507,7 +507,7 @@ class MOZ_NON_PARAM alignas(8) Value
#if defined(JS_NUNBOX32)
return uint32_t(toTag()) <= uint32_t(JSVAL_TAG_CLEAR);
#elif defined(JS_PUNBOX64)
return (data.asBits | mozilla::DoubleTypeTraits::kSignBit) <= JSVAL_SHIFTED_TAG_MAX_DOUBLE;
return (data.asBits | mozilla::FloatingPoint<double>::kSignBit) <= JSVAL_SHIFTED_TAG_MAX_DOUBLE;
#endif
}
@ -1090,7 +1090,7 @@ IsCanonicalized(double d)
uint64_t bits;
mozilla::BitwiseCast<uint64_t>(d, &bits);
return (bits & ~mozilla::DoubleTypeTraits::kSignBit) == detail::CanonicalizedNaNBits;
return (bits & ~mozilla::FloatingPoint<double>::kSignBit) == detail::CanonicalizedNaNBits;
}
static inline Value