+2023-11-04 Bruno Haible <bruno@clisp.org>
+
+ fenv-exceptions-tracking-c99: Work around a NetBSD/x86_64 bug.
+ * m4/fenv-exceptions-tracking.m4 (gl_FENV_EXCEPTIONS_TRACKING): On
+ NetBSD/x86_64, set REPLACE_FETESTEXCEPT to 1.
+ * doc/posix-functions/fetestexcept.texi: Document the NetBSD bug.
+
2023-11-04 Bruno Haible <bruno@clisp.org>
fenv-rounding: Avoid a test failure on NetBSD/sparc64.
@item
This function is missing on some platforms:
FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, IRIX 6.5, Solaris 9, Cygwin 1.7.7, MSVC 9, Android 4.4.
+@item
+This function clears the floating-point exception trap bits on some platforms:
+@c It uses an 'fnstenv' instruction without subsequent 'fldenv' or 'fldcw'.
+NetBSD 9.3/x86_64.
@end itemize
Portability problems not fixed by Gnulib:
-# fenv-exceptions-tracking.m4 serial 1
+# fenv-exceptions-tracking.m4 serial 2
dnl Copyright (C) 2023 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl On musl libc, on those CPUs where fenv-except-tracking-raise.c
dnl uses the "generic" approach, feraiseexcept does not trigger traps
dnl because it merely manipulates flags in the control register.
+ dnl On NetBSD 9.3/x86_64, fetestexcept clears the exception trap bits,
+ dnl causing the fenv-environment tests to fail.
case "$host" in
arm*-*-linux*)
AC_CACHE_CHECK([whether feraiseexcept works],
*) REPLACE_FERAISEEXCEPT=1 ;;
esac
;;
+ x86_64-*-netbsd*)
+ dnl On NetBSD 9.3/x86_64, fetestexcept is broken: it clears the
+ dnl floating-point exception trap bits (because it uses an
+ dnl 'fnstenv' instruction without subsequent 'fldenv' or 'fldcw').
+ REPLACE_FETESTEXCEPT=1
+ ;;
esac
if test $REPLACE_FECLEAREXCEPT = 1 \
&& test $REPLACE_FETESTEXCEPT = 1 \