public inbox for libstdc++-cvs@sourceware.org
help / color / mirror / Atom feed
* [gcc r12-6628] libstdc++: Don't fail if math_errhandling is not defined
@ 2022-01-17 10:27 Matthias Kretz
0 siblings, 0 replies; only message in thread
From: Matthias Kretz @ 2022-01-17 10:27 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:84eb13b9d6a9979825f5deaa1c17762bf8c8ef9f
commit r12-6628-g84eb13b9d6a9979825f5deaa1c17762bf8c8ef9f
Author: Matthias Kretz <m.kretz@gsi.de>
Date: Mon Jan 17 10:38:29 2022 +0100
libstdc++: Don't fail if math_errhandling is not defined
Older glibc does not define math_errhandling with -ffast-math, in which
case floating-point exceptions are not used.
Signed-off-by: Matthias Kretz <m.kretz@gsi.de>
libstdc++-v3/ChangeLog:
* include/experimental/bits/simd.h (__floating_point_flags): Do
not rely on the presence of the math_errhandling macro.
Diff:
---
libstdc++-v3/include/experimental/bits/simd.h | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/libstdc++-v3/include/experimental/bits/simd.h b/libstdc++-v3/include/experimental/bits/simd.h
index d837d0efb21..c991e3f223e 100644
--- a/libstdc++-v3/include/experimental/bits/simd.h
+++ b/libstdc++-v3/include/experimental/bits/simd.h
@@ -283,11 +283,20 @@ constexpr inline bool __have_power_vmx = __have_power_vsx;
namespace __detail
{
+ constexpr bool __handle_fpexcept =
+#ifdef math_errhandling
+ math_errhandling & MATH_ERREXCEPT;
+#elif defined __FAST_MATH__
+ false;
+#else
+ true;
+#endif
+
constexpr std::uint_least64_t
__floating_point_flags()
{
std::uint_least64_t __flags = 0;
- if constexpr (math_errhandling & MATH_ERREXCEPT)
+ if constexpr (__handle_fpexcept)
__flags |= 1;
#ifdef __FAST_MATH__
__flags |= 1 << 1;
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2022-01-17 10:27 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-01-17 10:27 [gcc r12-6628] libstdc++: Don't fail if math_errhandling is not defined Matthias Kretz
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).