From: Guido van Rossum <guido@python.org>
Date: Fri, 14 Mar 1997 04:23:42 +0000 (+0000)
Subject: Change PyFPE_END_PROTECT to PyFPE_END_PROTECT(v).  v should be the
X-Git-Tag: v1.5a1~283
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=1f06beeeddea2abefe6ab10ced35d7c4186f9940;p=python

Change PyFPE_END_PROTECT to PyFPE_END_PROTECT(v).  v should be the
last variable to which a floating point expression is assigned.  The
macro passes its address to a dummy function so that the optimizer
can't delay calculating its value until after the macro.
---

diff --git a/Include/pyfpe.h b/Include/pyfpe.h
index ef44e66208..b2d8feed93 100644
--- a/Include/pyfpe.h
+++ b/Include/pyfpe.h
@@ -131,7 +131,7 @@ extern "C" {
 #include <math.h>
 extern jmp_buf PyFPE_jbuf;
 extern int PyFPE_counter;
-extern double PyFPE_dummy(void);
+extern double PyFPE_dummy();
 
 #define PyFPE_START_PROTECT(err_string, leave_stmt) \
 if (!PyFPE_counter++ && setjmp(PyFPE_jbuf)) { \
@@ -149,12 +149,12 @@ if (!PyFPE_counter++ && setjmp(PyFPE_jbuf)) { \
  * which counts down PyFPE_counter, and thereby monkey wrench the overeager
  * optimizer. Better solutions are welcomed....
  */
-#define PyFPE_END_PROTECT PyFPE_counter -= (int)PyFPE_dummy();
+#define PyFPE_END_PROTECT(v) PyFPE_counter -= (int)PyFPE_dummy(&(v));
 
 #else
 
 #define PyFPE_START_PROTECT(err_string, leave_stmt)
-#define PyFPE_END_PROTECT
+#define PyFPE_END_PROTECT(v)
 
 #endif