Issue #1580: use short float repr where possible.
- incorporate and adapt David Gay's dtoa and strtod
into the Python core
- on platforms where we can use Gay's code (almost
all!), repr(float) is based on the shortest
sequence of decimal digits that rounds correctly.
- add sys.float_repr_style attribute to indicate
whether we're using Gay's code or not
- add autoconf magic to detect and enable SSE2
instructions on x86/gcc
- slight change to repr and str: repr switches
to exponential notation at 1e16 instead of
1e17, str switches at 1e11 instead of 1e12
diff --git a/Include/pymath.h b/Include/pymath.h
index 6ad174d..8872e8a 100644
--- a/Include/pymath.h
+++ b/Include/pymath.h
@@ -92,6 +92,11 @@
# endif
#endif
+#ifdef HAVE_GCC_ASM_FOR_X87
+PyAPI_FUNC(unsigned short) _Py_get_387controlword(void);
+PyAPI_FUNC(void) _Py_set_387controlword(unsigned short);
+#endif
+
/* Py_IS_NAN(X)
* Return 1 if float or double arg is a NaN, else 0.
* Caution: