public inbox for libstdc++-cvs@sourceware.org
help / color / mirror / Atom feed
* [gcc r12-7773] libstdc++-v3 testsuite: Call fesetround(FE_DOWNWARD) only if defined
@ 2022-03-22 21:53 Hans-Peter Nilsson
0 siblings, 0 replies; only message in thread
From: Hans-Peter Nilsson @ 2022-03-22 21:53 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:5d2233f4033dfa37ad88dc2eab138524fe64242e
commit r12-7773-g5d2233f4033dfa37ad88dc2eab138524fe64242e
Author: Hans-Peter Nilsson <hp@axis.com>
Date: Tue Mar 22 22:53:02 2022 +0100
libstdc++-v3 testsuite: Call fesetround(FE_DOWNWARD) only if defined
Without this, for a typical soft-float target such as cris-elf, after
commit r12-7676-g5a4e208022e704 you'll see, in libstdc++.log:
...
FAIL: 20_util/from_chars/6.cc (test for excess errors)
Excess errors:
/home/hp/tmp/auto0321/gcc/libstdc++-v3/testsuite/20_util/from_chars/6.cc:33: error: 'FE_DOWNWARD' was not declared in this scope
UNRESOLVED: 20_util/from_chars/6.cc compilation failed to produce executable
...
It appears to be a side-effect of that commit changing the
way __cpp_lib_to_chars is defined. (On the bright side,
./7.cc now passes since that commit.)
TFM, specifically fenv(3), says that "Each of the macros
FE_DIVBYZERO, FE_INEXACT, FE_INVALID, FE_OVERFLOW,
FE_UNDERFLOW is defined when the implementation supports
handling of the corresponding exception".
A git-grep shows that this was the only place using a FE_ macro
unconditionally.
libstdc++-v3:
* testsuite/20_util/from_chars/6.cc (test01) [FE_DOWNWARD]:
Conditionalize call to fesetround.
Diff:
---
libstdc++-v3/testsuite/20_util/from_chars/6.cc | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libstdc++-v3/testsuite/20_util/from_chars/6.cc b/libstdc++-v3/testsuite/20_util/from_chars/6.cc
index d33484cebfe..fff3450b56c 100644
--- a/libstdc++-v3/testsuite/20_util/from_chars/6.cc
+++ b/libstdc++-v3/testsuite/20_util/from_chars/6.cc
@@ -30,7 +30,9 @@ test01()
#if __cpp_lib_to_chars >= 201611L
#if _GLIBCXX_USE_C99_FENV_TR1
double d;
+#ifdef FE_DOWNWARD
std::fesetround(FE_DOWNWARD);
+#endif
const std::string s = "0.099999999999999999999999999";
auto res = std::from_chars(s.data(), s.data() + s.length(), d);
VERIFY( res.ec == std::errc{} );
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2022-03-22 21:53 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-03-22 21:53 [gcc r12-7773] libstdc++-v3 testsuite: Call fesetround(FE_DOWNWARD) only if defined Hans-Peter Nilsson
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).