https://gcc.gnu.org/g:4bf758b212170dba2b5a1881950e949ec4f8a58b
commit r15-3379-g4bf758b212170dba2b5a1881950e949ec4f8a58b
Author: Andreas Schwab <sch...@suse.de>
Date: Mon Sep 2 10:43:20 2024 +0200
libsupc++: Fix handling of m68k extended real in <compare>
PR libstdc++/116513
* libsupc++/compare (_S_fp_bits) [__fmt == _M68k_80bit]: Shift
padding out of exponent word.
Diff:
---
libstdc++-v3/libsupc++/compare | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/libstdc++-v3/libsupc++/compare b/libstdc++-v3/libsupc++/compare
index 686aa6d218fe..63ad6b5c23e9 100644
--- a/libstdc++-v3/libsupc++/compare
+++ b/libstdc++-v3/libsupc++/compare
@@ -838,7 +838,7 @@ namespace std _GLIBCXX_VISIBILITY(default)
using enum _Fp_fmt;
#endif
constexpr auto __fmt = _S_fp_fmt<_Tp>();
- if constexpr (__fmt == _X86_80bit || __fmt == _M68k_80bit)
+ if constexpr (__fmt == _X86_80bit)
{
if constexpr (sizeof(_Tp) == 3 * sizeof(int32_t))
{
@@ -851,6 +851,11 @@ namespace std _GLIBCXX_VISIBILITY(default)
return _Int<int16_t>(__ival._M_hi, __ival._M_lo);
}
}
+ else if constexpr (__fmt == _M68k_80bit)
+ {
+ auto __ival = __builtin_bit_cast(_Int<int32_t>, __val);
+ return _Int<int16_t>(__ival._M_hi >> 16, __ival._M_lo);
+ }
else if constexpr (sizeof(_Tp) == 2 * sizeof(int64_t))
{
#if __SIZEOF_INT128__
