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Issue #5724: Fix cmath failures on Solaris 10.
This commit is contained in:
Mark Dickinson
parent
6703225258
commit
e05e8409e1
7 changed files with 397 additions and 22 deletions
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@ -77,6 +77,21 @@ extern double copysign(double, double);
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#define Py_MATH_E 2.7182818284590452354
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#endif
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/* On x86, Py_FORCE_DOUBLE forces a floating-point number out of an x87 FPU
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register and into a 64-bit memory location, rounding from extended
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precision to double precision in the process. On other platforms it does
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nothing. */
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/* we take double rounding as evidence of x87 usage */
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#ifndef Py_FORCE_DOUBLE
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# ifdef X87_DOUBLE_ROUNDING
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PyAPI_FUNC(double) _Py_force_double(double);
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# define Py_FORCE_DOUBLE(X) (_Py_force_double(X))
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# else
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# define Py_FORCE_DOUBLE(X) (X)
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# endif
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#endif
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/* Py_IS_NAN(X)
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* Return 1 if float or double arg is a NaN, else 0.
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* Caution:
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@ -87,7 +102,7 @@ extern double copysign(double, double);
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* Note: PC/pyconfig.h defines Py_IS_NAN as _isnan
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*/
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#ifndef Py_IS_NAN
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#ifdef HAVE_ISNAN
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#if defined HAVE_DECL_ISNAN && HAVE_DECL_ISNAN == 1
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#define Py_IS_NAN(X) isnan(X)
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#else
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#define Py_IS_NAN(X) ((X) != (X))
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@ -101,13 +116,17 @@ extern double copysign(double, double);
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* This implementation may set the underflow flag if |X| is very small;
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* it really can't be implemented correctly (& easily) before C99.
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* Override in pyconfig.h if you have a better spelling on your platform.
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* Py_FORCE_DOUBLE is used to avoid getting false negatives from a
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* non-infinite value v sitting in an 80-bit x87 register such that
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* v becomes infinite when spilled from the register to 64-bit memory.
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* Note: PC/pyconfig.h defines Py_IS_INFINITY as _isinf
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*/
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#ifndef Py_IS_INFINITY
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#ifdef HAVE_ISINF
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# if defined HAVE_DECL_ISINF && HAVE_DECL_ISINF == 1
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# define Py_IS_INFINITY(X) isinf(X)
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# else
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#define Py_IS_INFINITY(X) ((X) && (X)*0.5 == (X))
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# define Py_IS_INFINITY(X) ((X) && \
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(Py_FORCE_DOUBLE(X)*0.5 == Py_FORCE_DOUBLE(X)))
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# endif
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#endif
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@ -118,7 +137,9 @@ extern double copysign(double, double);
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* Note: PC/pyconfig.h defines Py_IS_FINITE as _finite
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*/
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#ifndef Py_IS_FINITE
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#ifdef HAVE_FINITE
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#if defined HAVE_DECL_ISFINITE && HAVE_DECL_ISFINITE == 1
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#define Py_IS_FINITE(X) isfinite(X)
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#elif defined HAVE_FINITE
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#define Py_IS_FINITE(X) finite(X)
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#else
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#define Py_IS_FINITE(X) (!Py_IS_INFINITY(X) && !Py_IS_NAN(X))
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@ -12,6 +12,10 @@ What's New in Python 2.6.3
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Core and Builtins
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-----------------
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- Issue #5724: (See also issue #4575.) Fix Py_IS_INFINITY macro to
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work correctly on x87 FPUs: it now forces its argument to double
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before testing for infinity.
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- Issue #4971: Fix titlecase for characters that are their own
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titlecase, but not their own uppercase.
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@ -405,11 +405,11 @@ Py_NO_ENABLE_SHARED to find out. Also support MS_NO_COREDLL for b/w compat */
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/* Define to 1 if you have the `copysign' function. */
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#define HAVE_COPYSIGN 1
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/* Define to 1 if you have the `isinf' function. */
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#define HAVE_ISINF 1
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/* Define to 1 if you have the `isinf' macro. */
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#define HAVE_DECL_ISINF 1
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/* Define to 1 if you have the `isnan' function. */
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#define HAVE_ISNAN 1
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#define HAVE_DECL_ISNAN 1
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/* Define if on AIX 3.
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System headers sometimes define this.
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@ -1,5 +1,18 @@
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#include "Python.h"
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#ifdef X87_DOUBLE_ROUNDING
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/* On x86 platforms using an x87 FPU, this function is called from the
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Py_FORCE_DOUBLE macro (defined in pymath.h) to force a floating-point
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number out of an 80-bit x87 FPU register and into a 64-bit memory location,
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thus rounding from extended precision to double precision. */
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double _Py_force_double(double x)
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{
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volatile double y;
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y = x;
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return y;
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}
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#endif
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#ifndef HAVE_HYPOT
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double hypot(double x, double y)
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{
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297
configure
vendored
297
configure
vendored
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@ -1,5 +1,5 @@
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#! /bin/sh
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# From configure.in Revision: 68599 .
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# From configure.in Revision: 70731 .
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# Guess values for system-dependent variables and create Makefiles.
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# Generated by GNU Autoconf 2.61 for python 2.6.
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#
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@ -21525,6 +21525,94 @@ fi
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LIBS_SAVE=$LIBS
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LIBS="$LIBS $LIBM"
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# Detect whether system arithmetic is subject to x87-style double
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# rounding issues. The result of this test has little meaning on non
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# IEEE 754 platforms. On IEEE 754, test should return 1 if rounding
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# mode is round-to-nearest and double rounding issues are present, and
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# 0 otherwise. See http://bugs.python.org/issue2937 for more info.
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{ echo "$as_me:$LINENO: checking for x87-style double rounding" >&5
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echo $ECHO_N "checking for x87-style double rounding... $ECHO_C" >&6; }
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if test "${ac_cv_x87_double_rounding+set}" = set; then
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echo $ECHO_N "(cached) $ECHO_C" >&6
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else
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if test "$cross_compiling" = yes; then
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ac_cv_x87_double_rounding=no
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else
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cat >conftest.$ac_ext <<_ACEOF
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/* confdefs.h. */
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_ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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#include <stdlib.h>
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#include <math.h>
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int main() {
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volatile double x, y, z;
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/* 1./(1-2**-53) -> 1+2**-52 (correct), 1.0 (double rounding) */
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x = 0.99999999999999989; /* 1-2**-53 */
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y = 1./x;
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if (y != 1.)
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exit(0);
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/* 1e16+2.99999 -> 1e16+2. (correct), 1e16+4. (double rounding) */
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x = 1e16;
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y = 2.99999;
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z = x + y;
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if (z != 1e16+4.)
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exit(0);
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/* both tests show evidence of double rounding */
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exit(1);
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}
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_ACEOF
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rm -f conftest$ac_exeext
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if { (ac_try="$ac_link"
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case "(($ac_try" in
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*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
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*) ac_try_echo=$ac_try;;
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esac
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eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
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(eval "$ac_link") 2>&5
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ac_status=$?
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echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); } && { ac_try='./conftest$ac_exeext'
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{ (case "(($ac_try" in
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*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
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*) ac_try_echo=$ac_try;;
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esac
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eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
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(eval "$ac_try") 2>&5
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ac_status=$?
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echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }; then
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ac_cv_x87_double_rounding=no
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else
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echo "$as_me: program exited with status $ac_status" >&5
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echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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( exit $ac_status )
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ac_cv_x87_double_rounding=yes
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fi
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rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
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fi
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fi
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{ echo "$as_me:$LINENO: result: $ac_cv_x87_double_rounding" >&5
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echo "${ECHO_T}$ac_cv_x87_double_rounding" >&6; }
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if test "$ac_cv_x87_double_rounding" = yes
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then
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cat >>confdefs.h <<\_ACEOF
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#define X87_DOUBLE_ROUNDING 1
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_ACEOF
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fi
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# On FreeBSD 6.2, it appears that tanh(-0.) returns 0. instead of
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# -0. on some architectures.
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{ echo "$as_me:$LINENO: checking whether tanh preserves the sign of zero" >&5
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@ -21609,9 +21697,7 @@ fi
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for ac_func in acosh asinh atanh copysign expm1 finite hypot isinf isnan log1p
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for ac_func in acosh asinh atanh copysign expm1 finite hypot log1p
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do
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as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
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{ echo "$as_me:$LINENO: checking for $ac_func" >&5
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@ -21704,6 +21790,209 @@ _ACEOF
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fi
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done
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{ echo "$as_me:$LINENO: checking whether isinf is declared" >&5
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echo $ECHO_N "checking whether isinf is declared... $ECHO_C" >&6; }
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if test "${ac_cv_have_decl_isinf+set}" = set; then
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echo $ECHO_N "(cached) $ECHO_C" >&6
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else
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cat >conftest.$ac_ext <<_ACEOF
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/* confdefs.h. */
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_ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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#include <math.h>
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int
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main ()
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{
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#ifndef isinf
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(void) isinf;
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#endif
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;
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return 0;
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}
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_ACEOF
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rm -f conftest.$ac_objext
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if { (ac_try="$ac_compile"
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case "(($ac_try" in
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*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
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*) ac_try_echo=$ac_try;;
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esac
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eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
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(eval "$ac_compile") 2>conftest.er1
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ac_status=$?
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grep -v '^ *+' conftest.er1 >conftest.err
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rm -f conftest.er1
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cat conftest.err >&5
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echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); } && {
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test -z "$ac_c_werror_flag" ||
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test ! -s conftest.err
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} && test -s conftest.$ac_objext; then
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ac_cv_have_decl_isinf=yes
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else
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echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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ac_cv_have_decl_isinf=no
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fi
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rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
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fi
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{ echo "$as_me:$LINENO: result: $ac_cv_have_decl_isinf" >&5
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echo "${ECHO_T}$ac_cv_have_decl_isinf" >&6; }
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if test $ac_cv_have_decl_isinf = yes; then
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cat >>confdefs.h <<_ACEOF
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#define HAVE_DECL_ISINF 1
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_ACEOF
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else
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cat >>confdefs.h <<_ACEOF
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#define HAVE_DECL_ISINF 0
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_ACEOF
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fi
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{ echo "$as_me:$LINENO: checking whether isnan is declared" >&5
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echo $ECHO_N "checking whether isnan is declared... $ECHO_C" >&6; }
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if test "${ac_cv_have_decl_isnan+set}" = set; then
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echo $ECHO_N "(cached) $ECHO_C" >&6
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else
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cat >conftest.$ac_ext <<_ACEOF
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/* confdefs.h. */
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_ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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#include <math.h>
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int
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main ()
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{
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#ifndef isnan
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(void) isnan;
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#endif
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;
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return 0;
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}
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_ACEOF
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rm -f conftest.$ac_objext
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if { (ac_try="$ac_compile"
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case "(($ac_try" in
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*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
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*) ac_try_echo=$ac_try;;
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esac
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eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
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(eval "$ac_compile") 2>conftest.er1
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ac_status=$?
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grep -v '^ *+' conftest.er1 >conftest.err
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rm -f conftest.er1
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cat conftest.err >&5
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echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); } && {
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test -z "$ac_c_werror_flag" ||
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test ! -s conftest.err
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} && test -s conftest.$ac_objext; then
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ac_cv_have_decl_isnan=yes
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else
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echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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ac_cv_have_decl_isnan=no
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fi
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rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
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fi
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{ echo "$as_me:$LINENO: result: $ac_cv_have_decl_isnan" >&5
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echo "${ECHO_T}$ac_cv_have_decl_isnan" >&6; }
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if test $ac_cv_have_decl_isnan = yes; then
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cat >>confdefs.h <<_ACEOF
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#define HAVE_DECL_ISNAN 1
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_ACEOF
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else
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cat >>confdefs.h <<_ACEOF
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#define HAVE_DECL_ISNAN 0
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_ACEOF
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fi
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{ echo "$as_me:$LINENO: checking whether isfinite is declared" >&5
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echo $ECHO_N "checking whether isfinite is declared... $ECHO_C" >&6; }
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if test "${ac_cv_have_decl_isfinite+set}" = set; then
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echo $ECHO_N "(cached) $ECHO_C" >&6
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else
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cat >conftest.$ac_ext <<_ACEOF
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/* confdefs.h. */
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_ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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#include <math.h>
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int
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main ()
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{
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#ifndef isfinite
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(void) isfinite;
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#endif
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;
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return 0;
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}
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_ACEOF
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rm -f conftest.$ac_objext
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if { (ac_try="$ac_compile"
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case "(($ac_try" in
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*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
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*) ac_try_echo=$ac_try;;
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esac
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eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
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(eval "$ac_compile") 2>conftest.er1
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ac_status=$?
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grep -v '^ *+' conftest.er1 >conftest.err
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rm -f conftest.er1
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cat conftest.err >&5
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echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); } && {
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test -z "$ac_c_werror_flag" ||
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test ! -s conftest.err
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} && test -s conftest.$ac_objext; then
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ac_cv_have_decl_isfinite=yes
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else
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echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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ac_cv_have_decl_isfinite=no
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fi
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rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
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fi
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{ echo "$as_me:$LINENO: result: $ac_cv_have_decl_isfinite" >&5
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echo "${ECHO_T}$ac_cv_have_decl_isfinite" >&6; }
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if test $ac_cv_have_decl_isfinite = yes; then
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cat >>confdefs.h <<_ACEOF
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#define HAVE_DECL_ISFINITE 1
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_ACEOF
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else
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cat >>confdefs.h <<_ACEOF
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#define HAVE_DECL_ISFINITE 0
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_ACEOF
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fi
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LIBS=$LIBS_SAVE
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41
configure.in
41
configure.in
|
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@ -3145,6 +3145,44 @@ fi],
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LIBS_SAVE=$LIBS
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LIBS="$LIBS $LIBM"
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||||
|
||||
# Detect whether system arithmetic is subject to x87-style double
|
||||
# rounding issues. The result of this test has little meaning on non
|
||||
# IEEE 754 platforms. On IEEE 754, test should return 1 if rounding
|
||||
# mode is round-to-nearest and double rounding issues are present, and
|
||||
# 0 otherwise. See http://bugs.python.org/issue2937 for more info.
|
||||
AC_MSG_CHECKING(for x87-style double rounding)
|
||||
AC_CACHE_VAL(ac_cv_x87_double_rounding, [
|
||||
AC_TRY_RUN([
|
||||
#include <stdlib.h>
|
||||
#include <math.h>
|
||||
int main() {
|
||||
volatile double x, y, z;
|
||||
/* 1./(1-2**-53) -> 1+2**-52 (correct), 1.0 (double rounding) */
|
||||
x = 0.99999999999999989; /* 1-2**-53 */
|
||||
y = 1./x;
|
||||
if (y != 1.)
|
||||
exit(0);
|
||||
/* 1e16+2.99999 -> 1e16+2. (correct), 1e16+4. (double rounding) */
|
||||
x = 1e16;
|
||||
y = 2.99999;
|
||||
z = x + y;
|
||||
if (z != 1e16+4.)
|
||||
exit(0);
|
||||
/* both tests show evidence of double rounding */
|
||||
exit(1);
|
||||
}
|
||||
],
|
||||
ac_cv_x87_double_rounding=no,
|
||||
ac_cv_x87_double_rounding=yes,
|
||||
ac_cv_x87_double_rounding=no)])
|
||||
AC_MSG_RESULT($ac_cv_x87_double_rounding)
|
||||
if test "$ac_cv_x87_double_rounding" = yes
|
||||
then
|
||||
AC_DEFINE(X87_DOUBLE_ROUNDING, 1,
|
||||
[Define if arithmetic is subject to x87-style double rounding issue])
|
||||
fi
|
||||
|
||||
|
||||
# On FreeBSD 6.2, it appears that tanh(-0.) returns 0. instead of
|
||||
# -0. on some architectures.
|
||||
AC_MSG_CHECKING(whether tanh preserves the sign of zero)
|
||||
|
|
@ -3171,7 +3209,8 @@ then
|
|||
[Define if tanh(-0.) is -0., or if platform doesn't have signed zeros])
|
||||
fi
|
||||
|
||||
AC_CHECK_FUNCS([acosh asinh atanh copysign expm1 finite hypot isinf isnan log1p])
|
||||
AC_CHECK_FUNCS([acosh asinh atanh copysign expm1 finite hypot log1p])
|
||||
AC_CHECK_DECLS([isinf, isnan, isfinite], [], [], [[#include <math.h>]])
|
||||
|
||||
LIBS=$LIBS_SAVE
|
||||
|
||||
|
|
|
|||
|
|
@ -115,6 +115,18 @@
|
|||
/* 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
|
||||
|
|
@ -315,12 +327,6 @@
|
|||
/* 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
|
||||
|
||||
|
|
@ -360,7 +366,7 @@
|
|||
/* 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). */
|
||||
|
|
@ -983,6 +989,9 @@
|
|||
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…
Add table
Add a link
Reference in a new issue