mirror of
https://github.com/python/cpython
synced 2024-09-05 00:05:39 +00:00
Merged revisions 68296,68299 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk ........ r68296 | mark.dickinson | 2009-01-04 12:29:36 +0000 (Sun, 04 Jan 2009) | 6 lines Add autoconf test to detect x87-style double rounding, as described in issue #2937. This information can be helpful for diagnosing platform- specific problems in math and cmath. The result of the test also serves as a fairly reliable indicator of whether the x87 floating-point instructions (as opposed to SSE2) are in use on Intel x86/x86_64 systems. ........ r68299 | mark.dickinson | 2009-01-04 13:57:26 +0000 (Sun, 04 Jan 2009) | 4 lines isinf and isnan are macros, not functions; fix configure script to use AC_CHECK_DECLS instead of AC_CHECK_FUNCS for these. (See discussion in issue #4506) ........
This commit is contained in:
Mark Dickinson
parent
277a150146
commit
3dc7c6a375
|
|
@ -87,7 +87,7 @@ extern double copysign(double, double);
|
|||
* Note: PC/pyconfig.h defines Py_IS_NAN as _isnan
|
||||
*/
|
||||
#ifndef Py_IS_NAN
|
||||
#ifdef HAVE_ISNAN
|
||||
#ifdef HAVE_DECL_ISNAN
|
||||
#define Py_IS_NAN(X) isnan(X)
|
||||
#else
|
||||
#define Py_IS_NAN(X) ((X) != (X))
|
||||
|
|
@ -104,7 +104,7 @@ extern double copysign(double, double);
|
|||
* Note: PC/pyconfig.h defines Py_IS_INFINITY as _isinf
|
||||
*/
|
||||
#ifndef Py_IS_INFINITY
|
||||
#ifdef HAVE_ISINF
|
||||
#ifdef HAVE_DECL_ISINF
|
||||
#define Py_IS_INFINITY(X) isinf(X)
|
||||
#else
|
||||
#define Py_IS_INFINITY(X) ((X) && (X)*0.5 == (X))
|
||||
|
|
|
|||
|
|
@ -395,11 +395,11 @@ Py_NO_ENABLE_SHARED to find out. Also support MS_NO_COREDLL for b/w compat */
|
|||
/* Define to 1 if you have the `copysign' function. */
|
||||
#define HAVE_COPYSIGN 1
|
||||
|
||||
/* Define to 1 if you have the `isinf' function. */
|
||||
#define HAVE_ISINF 1
|
||||
/* Define to 1 if you have the `isinf' macro. */
|
||||
#define HAVE_DECL_ISINF 1
|
||||
|
||||
/* Define to 1 if you have the `isnan' function. */
|
||||
#define HAVE_ISNAN 1
|
||||
#define HAVE_DECL_ISNAN 1
|
||||
|
||||
/* Define if on AIX 3.
|
||||
System headers sometimes define this.
|
||||
|
|
|
|||
297
configure
vendored
297
configure
vendored
|
|
@ -1,5 +1,5 @@
|
|||
#! /bin/sh
|
||||
# From configure.in Revision: 67461 .
|
||||
# From configure.in Revision: 68245 .
|
||||
# Guess values for system-dependent variables and create Makefiles.
|
||||
# Generated by GNU Autoconf 2.61 for python 3.1.
|
||||
#
|
||||
|
|
@ -21214,6 +21214,94 @@ fi
|
|||
LIBS_SAVE=$LIBS
|
||||
LIBS="$LIBS $LIBM"
|
||||
|
||||
# Detect whether system arithmetic is subject to x87-style double
|
||||
# rounding issues. The result of this test has little meaning on non
|
||||
# IEEE 754 platforms. On IEEE 754, test should return 1 if rounding
|
||||
# mode is round-to-nearest and double rounding issues are present, and
|
||||
# 0 otherwise. See http://bugs.python.org/issue2937 for more info.
|
||||
{ echo "$as_me:$LINENO: checking for x87-style double rounding" >&5
|
||||
echo $ECHO_N "checking for x87-style double rounding... $ECHO_C" >&6; }
|
||||
if test "${ac_cv_x87_double_rounding+set}" = set; then
|
||||
echo $ECHO_N "(cached) $ECHO_C" >&6
|
||||
else
|
||||
|
||||
if test "$cross_compiling" = yes; then
|
||||
ac_cv_x87_double_rounding=no
|
||||
else
|
||||
cat >conftest.$ac_ext <<_ACEOF
|
||||
/* confdefs.h. */
|
||||
_ACEOF
|
||||
cat confdefs.h >>conftest.$ac_ext
|
||||
cat >>conftest.$ac_ext <<_ACEOF
|
||||
/* end confdefs.h. */
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <math.h>
|
||||
int main() {
|
||||
volatile double x, y, z;
|
||||
/* 1./(1-2**-53) -> 1+2**-52 (correct), 1.0 (double rounding) */
|
||||
x = 0.99999999999999989; /* 1-2**-53 */
|
||||
y = 1./x;
|
||||
if (y != 1.)
|
||||
exit(0);
|
||||
/* 1e16+2.99999 -> 1e16+2. (correct), 1e16+4. (double rounding) */
|
||||
x = 1e16;
|
||||
y = 2.99999;
|
||||
z = x + y;
|
||||
if (z != 1e16+4.)
|
||||
exit(0);
|
||||
/* both tests show evidence of double rounding */
|
||||
exit(1);
|
||||
}
|
||||
|
||||
_ACEOF
|
||||
rm -f conftest$ac_exeext
|
||||
if { (ac_try="$ac_link"
|
||||
case "(($ac_try" in
|
||||
*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
|
||||
*) ac_try_echo=$ac_try;;
|
||||
esac
|
||||
eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
|
||||
(eval "$ac_link") 2>&5
|
||||
ac_status=$?
|
||||
echo "$as_me:$LINENO: \$? = $ac_status" >&5
|
||||
(exit $ac_status); } && { ac_try='./conftest$ac_exeext'
|
||||
{ (case "(($ac_try" in
|
||||
*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
|
||||
*) ac_try_echo=$ac_try;;
|
||||
esac
|
||||
eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
|
||||
(eval "$ac_try") 2>&5
|
||||
ac_status=$?
|
||||
echo "$as_me:$LINENO: \$? = $ac_status" >&5
|
||||
(exit $ac_status); }; }; then
|
||||
ac_cv_x87_double_rounding=no
|
||||
else
|
||||
echo "$as_me: program exited with status $ac_status" >&5
|
||||
echo "$as_me: failed program was:" >&5
|
||||
sed 's/^/| /' conftest.$ac_ext >&5
|
||||
|
||||
( exit $ac_status )
|
||||
ac_cv_x87_double_rounding=yes
|
||||
fi
|
||||
rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
|
||||
fi
|
||||
|
||||
|
||||
fi
|
||||
|
||||
{ echo "$as_me:$LINENO: result: $ac_cv_x87_double_rounding" >&5
|
||||
echo "${ECHO_T}$ac_cv_x87_double_rounding" >&6; }
|
||||
if test "$ac_cv_x87_double_rounding" = yes
|
||||
then
|
||||
|
||||
cat >>confdefs.h <<\_ACEOF
|
||||
#define X87_DOUBLE_ROUNDING 1
|
||||
_ACEOF
|
||||
|
||||
fi
|
||||
|
||||
|
||||
# On FreeBSD 6.2, it appears that tanh(-0.) returns 0. instead of
|
||||
# -0. on some architectures.
|
||||
{ echo "$as_me:$LINENO: checking whether tanh preserves the sign of zero" >&5
|
||||
|
|
@ -21400,9 +21488,7 @@ done
|
|||
|
||||
|
||||
|
||||
|
||||
|
||||
for ac_func in acosh asinh atanh copysign expm1 finite isinf isnan log1p
|
||||
for ac_func in acosh asinh atanh copysign expm1 finite log1p
|
||||
do
|
||||
as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
|
||||
{ echo "$as_me:$LINENO: checking for $ac_func" >&5
|
||||
|
|
@ -21495,6 +21581,209 @@ _ACEOF
|
|||
fi
|
||||
done
|
||||
|
||||
{ echo "$as_me:$LINENO: checking whether isinf is declared" >&5
|
||||
echo $ECHO_N "checking whether isinf is declared... $ECHO_C" >&6; }
|
||||
if test "${ac_cv_have_decl_isinf+set}" = set; then
|
||||
echo $ECHO_N "(cached) $ECHO_C" >&6
|
||||
else
|
||||
cat >conftest.$ac_ext <<_ACEOF
|
||||
/* confdefs.h. */
|
||||
_ACEOF
|
||||
cat confdefs.h >>conftest.$ac_ext
|
||||
cat >>conftest.$ac_ext <<_ACEOF
|
||||
/* end confdefs.h. */
|
||||
#include <math.h>
|
||||
|
||||
int
|
||||
main ()
|
||||
{
|
||||
#ifndef isinf
|
||||
(void) isinf;
|
||||
#endif
|
||||
|
||||
;
|
||||
return 0;
|
||||
}
|
||||
_ACEOF
|
||||
rm -f conftest.$ac_objext
|
||||
if { (ac_try="$ac_compile"
|
||||
case "(($ac_try" in
|
||||
*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
|
||||
*) ac_try_echo=$ac_try;;
|
||||
esac
|
||||
eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
|
||||
(eval "$ac_compile") 2>conftest.er1
|
||||
ac_status=$?
|
||||
grep -v '^ *+' conftest.er1 >conftest.err
|
||||
rm -f conftest.er1
|
||||
cat conftest.err >&5
|
||||
echo "$as_me:$LINENO: \$? = $ac_status" >&5
|
||||
(exit $ac_status); } && {
|
||||
test -z "$ac_c_werror_flag" ||
|
||||
test ! -s conftest.err
|
||||
} && test -s conftest.$ac_objext; then
|
||||
ac_cv_have_decl_isinf=yes
|
||||
else
|
||||
echo "$as_me: failed program was:" >&5
|
||||
sed 's/^/| /' conftest.$ac_ext >&5
|
||||
|
||||
ac_cv_have_decl_isinf=no
|
||||
fi
|
||||
|
||||
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
|
||||
fi
|
||||
{ echo "$as_me:$LINENO: result: $ac_cv_have_decl_isinf" >&5
|
||||
echo "${ECHO_T}$ac_cv_have_decl_isinf" >&6; }
|
||||
if test $ac_cv_have_decl_isinf = yes; then
|
||||
|
||||
cat >>confdefs.h <<_ACEOF
|
||||
#define HAVE_DECL_ISINF 1
|
||||
_ACEOF
|
||||
|
||||
|
||||
else
|
||||
cat >>confdefs.h <<_ACEOF
|
||||
#define HAVE_DECL_ISINF 0
|
||||
_ACEOF
|
||||
|
||||
|
||||
fi
|
||||
{ echo "$as_me:$LINENO: checking whether isnan is declared" >&5
|
||||
echo $ECHO_N "checking whether isnan is declared... $ECHO_C" >&6; }
|
||||
if test "${ac_cv_have_decl_isnan+set}" = set; then
|
||||
echo $ECHO_N "(cached) $ECHO_C" >&6
|
||||
else
|
||||
cat >conftest.$ac_ext <<_ACEOF
|
||||
/* confdefs.h. */
|
||||
_ACEOF
|
||||
cat confdefs.h >>conftest.$ac_ext
|
||||
cat >>conftest.$ac_ext <<_ACEOF
|
||||
/* end confdefs.h. */
|
||||
#include <math.h>
|
||||
|
||||
int
|
||||
main ()
|
||||
{
|
||||
#ifndef isnan
|
||||
(void) isnan;
|
||||
#endif
|
||||
|
||||
;
|
||||
return 0;
|
||||
}
|
||||
_ACEOF
|
||||
rm -f conftest.$ac_objext
|
||||
if { (ac_try="$ac_compile"
|
||||
case "(($ac_try" in
|
||||
*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
|
||||
*) ac_try_echo=$ac_try;;
|
||||
esac
|
||||
eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
|
||||
(eval "$ac_compile") 2>conftest.er1
|
||||
ac_status=$?
|
||||
grep -v '^ *+' conftest.er1 >conftest.err
|
||||
rm -f conftest.er1
|
||||
cat conftest.err >&5
|
||||
echo "$as_me:$LINENO: \$? = $ac_status" >&5
|
||||
(exit $ac_status); } && {
|
||||
test -z "$ac_c_werror_flag" ||
|
||||
test ! -s conftest.err
|
||||
} && test -s conftest.$ac_objext; then
|
||||
ac_cv_have_decl_isnan=yes
|
||||
else
|
||||
echo "$as_me: failed program was:" >&5
|
||||
sed 's/^/| /' conftest.$ac_ext >&5
|
||||
|
||||
ac_cv_have_decl_isnan=no
|
||||
fi
|
||||
|
||||
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
|
||||
fi
|
||||
{ echo "$as_me:$LINENO: result: $ac_cv_have_decl_isnan" >&5
|
||||
echo "${ECHO_T}$ac_cv_have_decl_isnan" >&6; }
|
||||
if test $ac_cv_have_decl_isnan = yes; then
|
||||
|
||||
cat >>confdefs.h <<_ACEOF
|
||||
#define HAVE_DECL_ISNAN 1
|
||||
_ACEOF
|
||||
|
||||
|
||||
else
|
||||
cat >>confdefs.h <<_ACEOF
|
||||
#define HAVE_DECL_ISNAN 0
|
||||
_ACEOF
|
||||
|
||||
|
||||
fi
|
||||
{ echo "$as_me:$LINENO: checking whether isfinite is declared" >&5
|
||||
echo $ECHO_N "checking whether isfinite is declared... $ECHO_C" >&6; }
|
||||
if test "${ac_cv_have_decl_isfinite+set}" = set; then
|
||||
echo $ECHO_N "(cached) $ECHO_C" >&6
|
||||
else
|
||||
cat >conftest.$ac_ext <<_ACEOF
|
||||
/* confdefs.h. */
|
||||
_ACEOF
|
||||
cat confdefs.h >>conftest.$ac_ext
|
||||
cat >>conftest.$ac_ext <<_ACEOF
|
||||
/* end confdefs.h. */
|
||||
#include <math.h>
|
||||
|
||||
int
|
||||
main ()
|
||||
{
|
||||
#ifndef isfinite
|
||||
(void) isfinite;
|
||||
#endif
|
||||
|
||||
;
|
||||
return 0;
|
||||
}
|
||||
_ACEOF
|
||||
rm -f conftest.$ac_objext
|
||||
if { (ac_try="$ac_compile"
|
||||
case "(($ac_try" in
|
||||
*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
|
||||
*) ac_try_echo=$ac_try;;
|
||||
esac
|
||||
eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
|
||||
(eval "$ac_compile") 2>conftest.er1
|
||||
ac_status=$?
|
||||
grep -v '^ *+' conftest.er1 >conftest.err
|
||||
rm -f conftest.er1
|
||||
cat conftest.err >&5
|
||||
echo "$as_me:$LINENO: \$? = $ac_status" >&5
|
||||
(exit $ac_status); } && {
|
||||
test -z "$ac_c_werror_flag" ||
|
||||
test ! -s conftest.err
|
||||
} && test -s conftest.$ac_objext; then
|
||||
ac_cv_have_decl_isfinite=yes
|
||||
else
|
||||
echo "$as_me: failed program was:" >&5
|
||||
sed 's/^/| /' conftest.$ac_ext >&5
|
||||
|
||||
ac_cv_have_decl_isfinite=no
|
||||
fi
|
||||
|
||||
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
|
||||
fi
|
||||
{ echo "$as_me:$LINENO: result: $ac_cv_have_decl_isfinite" >&5
|
||||
echo "${ECHO_T}$ac_cv_have_decl_isfinite" >&6; }
|
||||
if test $ac_cv_have_decl_isfinite = yes; then
|
||||
|
||||
cat >>confdefs.h <<_ACEOF
|
||||
#define HAVE_DECL_ISFINITE 1
|
||||
_ACEOF
|
||||
|
||||
|
||||
else
|
||||
cat >>confdefs.h <<_ACEOF
|
||||
#define HAVE_DECL_ISFINITE 0
|
||||
_ACEOF
|
||||
|
||||
|
||||
fi
|
||||
|
||||
|
||||
|
||||
LIBS=$LIBS_SAVE
|
||||
|
||||
|
|
|
|||
41
configure.in
41
configure.in
|
|
@ -3056,6 +3056,44 @@ fi],
|
|||
LIBS_SAVE=$LIBS
|
||||
LIBS="$LIBS $LIBM"
|
||||
|
||||
# Detect whether system arithmetic is subject to x87-style double
|
||||
# rounding issues. The result of this test has little meaning on non
|
||||
# IEEE 754 platforms. On IEEE 754, test should return 1 if rounding
|
||||
# mode is round-to-nearest and double rounding issues are present, and
|
||||
# 0 otherwise. See http://bugs.python.org/issue2937 for more info.
|
||||
AC_MSG_CHECKING(for x87-style double rounding)
|
||||
AC_CACHE_VAL(ac_cv_x87_double_rounding, [
|
||||
AC_TRY_RUN([
|
||||
#include <stdlib.h>
|
||||
#include <math.h>
|
||||
int main() {
|
||||
volatile double x, y, z;
|
||||
/* 1./(1-2**-53) -> 1+2**-52 (correct), 1.0 (double rounding) */
|
||||
x = 0.99999999999999989; /* 1-2**-53 */
|
||||
y = 1./x;
|
||||
if (y != 1.)
|
||||
exit(0);
|
||||
/* 1e16+2.99999 -> 1e16+2. (correct), 1e16+4. (double rounding) */
|
||||
x = 1e16;
|
||||
y = 2.99999;
|
||||
z = x + y;
|
||||
if (z != 1e16+4.)
|
||||
exit(0);
|
||||
/* both tests show evidence of double rounding */
|
||||
exit(1);
|
||||
}
|
||||
],
|
||||
ac_cv_x87_double_rounding=no,
|
||||
ac_cv_x87_double_rounding=yes,
|
||||
ac_cv_x87_double_rounding=no)])
|
||||
AC_MSG_RESULT($ac_cv_x87_double_rounding)
|
||||
if test "$ac_cv_x87_double_rounding" = yes
|
||||
then
|
||||
AC_DEFINE(X87_DOUBLE_ROUNDING, 1,
|
||||
[Define if arithmetic is subject to x87-style double rounding issue])
|
||||
fi
|
||||
|
||||
|
||||
# On FreeBSD 6.2, it appears that tanh(-0.) returns 0. instead of
|
||||
# -0. on some architectures.
|
||||
AC_MSG_CHECKING(whether tanh preserves the sign of zero)
|
||||
|
|
@ -3084,7 +3122,8 @@ fi
|
|||
|
||||
AC_REPLACE_FUNCS(hypot)
|
||||
|
||||
AC_CHECK_FUNCS(acosh asinh atanh copysign expm1 finite isinf isnan log1p)
|
||||
AC_CHECK_FUNCS([acosh asinh atanh copysign expm1 finite log1p])
|
||||
AC_CHECK_DECLS([isinf, isnan, isfinite], [], [], [[#include <math.h>]])
|
||||
|
||||
LIBS=$LIBS_SAVE
|
||||
|
||||
|
|
|
|||
|
|
@ -58,6 +58,10 @@
|
|||
/* Define to 1 if you have the <bluetooth.h> header file. */
|
||||
#undef HAVE_BLUETOOTH_H
|
||||
|
||||
/* Define if mbstowcs(NULL, "text", 0) does not return the number of wide
|
||||
chars that would be converted. */
|
||||
#undef HAVE_BROKEN_MBSTOWCS
|
||||
|
||||
/* Define if nice() returns success/failure instead of the new priority. */
|
||||
#undef HAVE_BROKEN_NICE
|
||||
|
||||
|
|
@ -112,6 +116,18 @@
|
|||
/* Define if you have the 'resize_term' function. */
|
||||
#undef HAVE_CURSES_RESIZE_TERM
|
||||
|
||||
/* Define to 1 if you have the declaration of `isfinite', and to 0 if you
|
||||
don't. */
|
||||
#undef HAVE_DECL_ISFINITE
|
||||
|
||||
/* Define to 1 if you have the declaration of `isinf', and to 0 if you don't.
|
||||
*/
|
||||
#undef HAVE_DECL_ISINF
|
||||
|
||||
/* Define to 1 if you have the declaration of `isnan', and to 0 if you don't.
|
||||
*/
|
||||
#undef HAVE_DECL_ISNAN
|
||||
|
||||
/* Define to 1 if you have the declaration of `tzname', and to 0 if you don't.
|
||||
*/
|
||||
#undef HAVE_DECL_TZNAME
|
||||
|
|
@ -312,12 +328,6 @@
|
|||
/* Define to 1 if you have the <io.h> header file. */
|
||||
#undef HAVE_IO_H
|
||||
|
||||
/* Define to 1 if you have the `isinf' function. */
|
||||
#undef HAVE_ISINF
|
||||
|
||||
/* Define to 1 if you have the `isnan' function. */
|
||||
#undef HAVE_ISNAN
|
||||
|
||||
/* Define to 1 if you have the `kill' function. */
|
||||
#undef HAVE_KILL
|
||||
|
||||
|
|
@ -357,7 +367,7 @@
|
|||
/* Define to 1 if you have the <libintl.h> header file. */
|
||||
#undef HAVE_LIBINTL_H
|
||||
|
||||
/* Define to 1 if you have the `readline' library (-lreadline). */
|
||||
/* Define if you have the readline library (-lreadline). */
|
||||
#undef HAVE_LIBREADLINE
|
||||
|
||||
/* Define to 1 if you have the `resolv' library (-lresolv). */
|
||||
|
|
@ -800,10 +810,6 @@
|
|||
/* Define to 1 if you have the `wcsxfrm' function. */
|
||||
#undef HAVE_WCSXFRM
|
||||
|
||||
/* Define if mbstowcs(NULL, "text", 0) does not return the number of
|
||||
wide chars that would be converted */
|
||||
#undef HAVE_BROKEN_MBSTOWCS
|
||||
|
||||
/* Define if tzset() actually switches the local timezone in a meaningful way.
|
||||
*/
|
||||
#undef HAVE_WORKING_TZSET
|
||||
|
|
@ -984,6 +990,9 @@
|
|||
first (like Motorola and SPARC, unlike Intel and VAX). */
|
||||
#undef WORDS_BIGENDIAN
|
||||
|
||||
/* Define if arithmetic is subject to x87-style double rounding issue */
|
||||
#undef X87_DOUBLE_ROUNDING
|
||||
|
||||
/* Define to 1 if on AIX 3.
|
||||
System headers sometimes define this.
|
||||
We just want to avoid a redefinition error message. */
|
||||
|
|
|
|||
Loading…
Reference in a new issue