From: Paul Eggert Date: Sun, 8 Jul 2018 17:51:00 +0000 (-0700) Subject: Fix floating point exceptions on Alpha (Bug#32086) X-Git-Tag: emacs-26.1.90~282 X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=848f0f73e98dfa8f32ffbcf7c2e0ea37ce123959;p=emacs.git Fix floating point exceptions on Alpha (Bug#32086) Backport from master. * admin/merge-gnulib (GNULIB_MODULES): Add fpieee. * m4/fpieee.m4: New file, copied from Gnulib. * m4/gnulib-comp.m4: Regenerate. --- diff --git a/admin/merge-gnulib b/admin/merge-gnulib index 42edfbbd367..b23adc26fb2 100755 --- a/admin/merge-gnulib +++ b/admin/merge-gnulib @@ -33,7 +33,7 @@ GNULIB_MODULES=' d-type diffseq dtoastr dtotimespec dup2 environ execinfo explicit_bzero faccessat fcntl fcntl-h fdatasync fdopendir - filemode filevercmp flexmember fstatat fsync + filemode filevercmp flexmember fpieee fstatat fsync getloadavg getopt-gnu gettime gettimeofday gitlog-to-changelog ignore-value intprops largefile lstat manywarnings memrchr minmax mkostemp mktime nstrftime diff --git a/lib/gnulib.mk.in b/lib/gnulib.mk.in index 71c01e3e2a2..e69ae45bb53 100644 --- a/lib/gnulib.mk.in +++ b/lib/gnulib.mk.in @@ -21,7 +21,7 @@ # the same distribution terms as the rest of that program. # # Generated by gnulib-tool. -# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --avoid=close --avoid=dup --avoid=fchdir --avoid=fstat --avoid=malloc-posix --avoid=msvc-inval --avoid=msvc-nothrow --avoid=openat-die --avoid=opendir --avoid=raise --avoid=save-cwd --avoid=select --avoid=setenv --avoid=sigprocmask --avoid=stat --avoid=stdarg --avoid=stdbool --avoid=threadlib --avoid=tzset --avoid=unsetenv --avoid=utime --avoid=utime-h --gnu-make --makefile-name=gnulib.mk.in --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt binary-io byteswap c-ctype c-strcase careadlinkat close-stream count-leading-zeros count-one-bits count-trailing-zeros crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 d-type diffseq dtoastr dtotimespec dup2 environ execinfo explicit_bzero faccessat fcntl fcntl-h fdatasync fdopendir filemode filevercmp flexmember fstatat fsync getloadavg getopt-gnu gettime gettimeofday gitlog-to-changelog ignore-value intprops largefile lstat manywarnings memrchr minmax mkostemp mktime nstrftime pipe2 pselect pthread_sigmask putenv qcopy-acl readlink readlinkat sig2str socklen stat-time std-gnu11 stdalign stddef stdio stpcpy strtoimax symlink sys_stat sys_time tempname time time_r time_rz timegm timer-time timespec-add timespec-sub unlocked-io update-copyright utimens vla warnings +# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --avoid=close --avoid=dup --avoid=fchdir --avoid=fstat --avoid=malloc-posix --avoid=msvc-inval --avoid=msvc-nothrow --avoid=openat-die --avoid=opendir --avoid=raise --avoid=save-cwd --avoid=select --avoid=setenv --avoid=sigprocmask --avoid=stat --avoid=stdarg --avoid=stdbool --avoid=threadlib --avoid=tzset --avoid=unsetenv --avoid=utime --avoid=utime-h --gnu-make --makefile-name=gnulib.mk.in --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt binary-io byteswap c-ctype c-strcase careadlinkat close-stream count-leading-zeros count-one-bits count-trailing-zeros crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 d-type diffseq dtoastr dtotimespec dup2 environ execinfo explicit_bzero faccessat fcntl fcntl-h fdatasync fdopendir filemode filevercmp flexmember fpieee fstatat fsync getloadavg getopt-gnu gettime gettimeofday gitlog-to-changelog ignore-value intprops largefile lstat manywarnings memrchr minmax mkostemp mktime nstrftime pipe2 pselect pthread_sigmask putenv qcopy-acl readlink readlinkat sig2str socklen stat-time std-gnu11 stdalign stddef stdio stpcpy strtoimax symlink sys_stat sys_time tempname time time_r time_rz timegm timer-time timespec-add timespec-sub unlocked-io update-copyright utimens vla warnings MOSTLYCLEANFILES += core *.stackdump diff --git a/m4/fpieee.m4 b/m4/fpieee.m4 new file mode 100644 index 00000000000..b58840f789d --- /dev/null +++ b/m4/fpieee.m4 @@ -0,0 +1,54 @@ +# fpieee.m4 serial 2 -*- coding: utf-8 -*- +dnl Copyright (C) 2007, 2009-2018 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 with or without modifications, as long as this notice is preserved. + +dnl IEEE 754 standardized three items: +dnl - The formats of single-float and double-float - nowadays commonly +dnl available as 'float' and 'double' in C and C++. +dnl No autoconf test needed. +dnl - The overflow and division by zero behaviour: The result are values +dnl '±Inf' and 'NaN', rather than exceptions as it was before. +dnl This file provides an autoconf macro for ensuring this behaviour of +dnl floating-point operations. +dnl - A set of conditions (overflow, underflow, inexact, etc.) which can +dnl be configured to trigger an exception. +dnl This cannot be done in a portable way: it depends on the compiler, +dnl libc, kernel, and CPU. No autoconf macro is provided for this. + +dnl Ensure non-trapping behaviour of floating-point overflow and +dnl floating-point division by zero. +dnl (For integer overflow, see gcc's -ftrapv option; for integer division by +dnl zero, see the autoconf macro in intdiv0.m4.) + +AC_DEFUN([gl_FP_IEEE], +[ + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([AC_CANONICAL_HOST]) + # IEEE behaviour is the default on all CPUs except Alpha and SH + # (according to the test results of Bruno Haible's ieeefp/fenv_default.m4 + # and the GCC 4.1.2 manual). + case "$host_cpu" in + alpha*) + # On Alpha systems, a compiler option provides the behaviour. + # See the ieee(3) manual page, also available at + # + if test -n "$GCC"; then + # GCC has the option -mieee. + # For full IEEE compliance (rarely needed), use option -mieee-with-inexact. + CPPFLAGS="$CPPFLAGS -mieee" + else + # Compaq (ex-DEC) C has the option -ieee, equivalent to -ieee_with_no_inexact. + # For full IEEE compliance (rarely needed), use option -ieee_with_inexact. + CPPFLAGS="$CPPFLAGS -ieee" + fi + ;; + sh*) + if test -n "$GCC"; then + # GCC has the option -mieee. + CPPFLAGS="$CPPFLAGS -mieee" + fi + ;; + esac +]) diff --git a/m4/gnulib-comp.m4 b/m4/gnulib-comp.m4 index 167356faed4..e30ff1f828f 100644 --- a/m4/gnulib-comp.m4 +++ b/m4/gnulib-comp.m4 @@ -86,6 +86,8 @@ AC_DEFUN([gl_EARLY], # Code from module filevercmp: # Code from module flexmember: # Code from module fpending: + # Code from module fpieee: + AC_REQUIRE([gl_FP_IEEE]) # Code from module fstatat: # Code from module fsync: # Code from module getdtablesize: @@ -994,6 +996,7 @@ AC_DEFUN([gl_FILE_LIST], [ m4/filemode.m4 m4/flexmember.m4 m4/fpending.m4 + m4/fpieee.m4 m4/fstatat.m4 m4/fsync.m4 m4/getdtablesize.m4