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| author | Siva Chandra Reddy <sivachandra@google.com> | 2020-06-22 13:47:56 -0700 |
|---|---|---|
| committer | Siva Chandra Reddy <sivachandra@google.com> | 2020-06-22 23:02:05 -0700 |
| commit | 987fac79c9a951806cbda6b178b05fcb5145fde8 (patch) | |
| tree | 6fa3415684826af81e8aad9be55e7cb66e956099 /libc/utils | |
| parent | f95850ce9c7593d3d8d2f83c55197970f373b9ad (diff) | |
| download | llvm-987fac79c9a951806cbda6b178b05fcb5145fde8.zip llvm-987fac79c9a951806cbda6b178b05fcb5145fde8.tar.gz llvm-987fac79c9a951806cbda6b178b05fcb5145fde8.tar.bz2 | |
[libc] Match x86 long double NaN classification with that of the compiler.
Reviewers: asteinhauser
Differential Revision: https://reviews.llvm.org/D82330
Diffstat (limited to 'libc/utils')
| -rw-r--r-- | libc/utils/FPUtil/LongDoubleBitsX86.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/libc/utils/FPUtil/LongDoubleBitsX86.h b/libc/utils/FPUtil/LongDoubleBitsX86.h index 1e92dba..3d7f455 100644 --- a/libc/utils/FPUtil/LongDoubleBitsX86.h +++ b/libc/utils/FPUtil/LongDoubleBitsX86.h @@ -62,9 +62,18 @@ template <> struct __attribute__((packed)) FPBits<long double> { return exponent == maxExponent && mantissa == 0 && implicitBit == 1; } - bool isNaN() const { return exponent == maxExponent && mantissa != 0; } + bool isNaN() const { + if (exponent == maxExponent) { + return (implicitBit == 0) || mantissa != 0; + } else if (exponent != 0) { + return implicitBit == 0; + } + return false; + } - bool isInfOrNaN() const { return exponent == maxExponent; } + bool isInfOrNaN() const { + return (exponent == maxExponent) || (exponent != 0 && implicitBit == 0); + } // Methods below this are used by tests. |