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diff Python/pymath.c @ 53734:69231cefd80d 3.0

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Issue #5724: Fix test_cmath failures on Solaris 10.
author Mark Dickinson <dickinsm@gmail.com>
date Mon, 04 May 2009 13:59:04 +0000
parents 79a6c63ac5b0
children e38335d4df91
line wrap: on
line diff
--- a/Python/pymath.c	Mon May 04 13:49:30 2009 +0000
+++ b/Python/pymath.c	Mon May 04 13:59:04 2009 +0000
@@ -1,5 +1,18 @@
 #include "Python.h"
 
+#ifdef X87_DOUBLE_ROUNDING
+/* On x86 platforms using an x87 FPU, this function is called from the
+   Py_FORCE_DOUBLE macro (defined in pymath.h) to force a floating-point
+   number out of an 80-bit x87 FPU register and into a 64-bit memory location,
+   thus rounding from extended precision to double precision. */
+double _Py_force_double(double x)
+{
+	volatile double y;
+	y = x;
+	return y;
+}
+#endif
+
 #ifndef HAVE_HYPOT
 double hypot(double x, double y)
 {