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Change PyFPE_END_PROTECT to PyFPE_END_PROTECT(v). v should be the

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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.
This commit is contained in:
Guido van Rossum 1997-03-14 04:23:42 +00:00
parent efd3a3a843
commit 1f06beeedd
1 changed files with 3 additions and 3 deletions
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6
Include/pyfpe.h
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@ -131,7 +131,7 @@ extern "C" {
#include <math.h> #include <math.h>
extern jmp_buf PyFPE_jbuf; extern jmp_buf PyFPE_jbuf;
extern int PyFPE_counter; extern int PyFPE_counter;
extern double PyFPE_dummy(void); extern double PyFPE_dummy();
#define PyFPE_START_PROTECT(err_string, leave_stmt) \ #define PyFPE_START_PROTECT(err_string, leave_stmt) \
if (!PyFPE_counter++ && setjmp(PyFPE_jbuf)) { \ 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 * which counts down PyFPE_counter, and thereby monkey wrench the overeager
* optimizer. Better solutions are welcomed.... * 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 #else
#define PyFPE_START_PROTECT(err_string, leave_stmt) #define PyFPE_START_PROTECT(err_string, leave_stmt)
#define PyFPE_END_PROTECT #define PyFPE_END_PROTECT(v)
#endif #endif