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[libcxxabi] Fix the long double demangling for PowerPC (#135332)

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PowerPC uses a slightly different type of floats for their 128 bit long
doubles, as "double-double", with __LDBL_MANT_DIG__ == 106 rather than
__LDBL_MANT_DIG__ == 113 for IEEE 128 bit floats.

This fixes compiling libcxxabi for PowerPC after
3b70715c13.
This commit is contained in:
Martin Storsjö
2025-04-11 12:24:13 +03:00
committed by GitHub
parent 476c1c5ec5
commit 8be4bd8570
1 changed files with 1 additions and 1 deletions
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2
libcxxabi/src/demangle/ItaniumDemangle.h
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@@ -5741,7 +5741,7 @@ struct FloatData<double>
template <>
struct FloatData<long double>
{
#if __LDBL_MANT_DIG__ == 113
#if __LDBL_MANT_DIG__ == 113 || __LDBL_MANT_DIG__ == 106
static const size_t mangled_size = 32;
#elif __LDBL_MANT_DIG__ == 53 || defined(_MSC_VER)
// MSVC doesn't define __LDBL_MANT_DIG__, but it has long double equal to