mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-07-13 14:39:10 +00:00
python-3.6.zip added from Github
README.cosmo contains the necessary links.
This commit is contained in:
ahgamut
Justine Tunney
parent
75fc601ff5
commit
0c4c56ff39
4219 changed files with 1968626 additions and 0 deletions
277
third_party/python/Modules/fpectlmodule.c
vendored
Normal file
277
third_party/python/Modules/fpectlmodule.c
vendored
Normal file
|
|
@ -0,0 +1,277 @@
|
|||
/*
|
||||
---------------------------------------------------------------------
|
||||
/ Copyright (c) 1996. \
|
||||
| The Regents of the University of California. |
|
||||
| All rights reserved. |
|
||||
| |
|
||||
| Permission to use, copy, modify, and distribute this software for |
|
||||
| any purpose without fee is hereby granted, provided that this en- |
|
||||
| tire notice is included in all copies of any software which is or |
|
||||
| includes a copy or modification of this software and in all |
|
||||
| copies of the supporting documentation for such software. |
|
||||
| |
|
||||
| This work was produced at the University of California, Lawrence |
|
||||
| Livermore National Laboratory under contract no. W-7405-ENG-48 |
|
||||
| between the U.S. Department of Energy and The Regents of the |
|
||||
| University of California for the operation of UC LLNL. |
|
||||
| |
|
||||
| DISCLAIMER |
|
||||
| |
|
||||
| This software was prepared as an account of work sponsored by an |
|
||||
| agency of the United States Government. Neither the United States |
|
||||
| Government nor the University of California nor any of their em- |
|
||||
| ployees, makes any warranty, express or implied, or assumes any |
|
||||
| liability or responsibility for the accuracy, completeness, or |
|
||||
| usefulness of any information, apparatus, product, or process |
|
||||
| disclosed, or represents that its use would not infringe |
|
||||
| privately-owned rights. Reference herein to any specific commer- |
|
||||
| cial products, process, or service by trade name, trademark, |
|
||||
| manufacturer, or otherwise, does not necessarily constitute or |
|
||||
| imply its endorsement, recommendation, or favoring by the United |
|
||||
| States Government or the University of California. The views and |
|
||||
| opinions of authors expressed herein do not necessarily state or |
|
||||
| reflect those of the United States Government or the University |
|
||||
| of California, and shall not be used for advertising or product |
|
||||
\ endorsement purposes. /
|
||||
---------------------------------------------------------------------
|
||||
*/
|
||||
|
||||
/*
|
||||
Floating point exception control module.
|
||||
|
||||
This Python module provides bare-bones control over floating point
|
||||
units from several hardware manufacturers. Specifically, it allows
|
||||
the user to turn on the generation of SIGFPE whenever any of the
|
||||
three serious IEEE 754 exceptions (Division by Zero, Overflow,
|
||||
Invalid Operation) occurs. We currently ignore Underflow and
|
||||
Inexact Result exceptions, although those could certainly be added
|
||||
if desired.
|
||||
|
||||
The module also establishes a signal handler for SIGFPE during
|
||||
initialization. This builds on code found in the Python
|
||||
distribution at Include/pyfpe.h and Python/pyfpe.c. If those files
|
||||
are not in your Python distribution, find them in a patch at
|
||||
ftp://icf.llnl.gov/pub/python/busby/patches.961108.tgz.
|
||||
|
||||
This module is only useful to you if it happens to include code
|
||||
specific for your hardware and software environment. If you can
|
||||
contribute OS-specific code for new platforms, or corrections for
|
||||
the code provided, it will be greatly appreciated.
|
||||
|
||||
** Version 1.0: September 20, 1996. Lee Busby, LLNL.
|
||||
*/
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
#include "Python.h"
|
||||
#include <signal.h>
|
||||
|
||||
#if defined(__FreeBSD__)
|
||||
# include <ieeefp.h>
|
||||
#endif
|
||||
|
||||
#ifndef WANT_SIGFPE_HANDLER
|
||||
/* Define locally if they are not defined in Python. This gives only
|
||||
* the limited control to induce a core dump in case of an exception.
|
||||
*/
|
||||
#include <setjmp.h>
|
||||
static jmp_buf PyFPE_jbuf;
|
||||
static int PyFPE_counter = 0;
|
||||
#endif
|
||||
|
||||
typedef void Sigfunc(int);
|
||||
static Sigfunc sigfpe_handler;
|
||||
static void fpe_reset(Sigfunc *);
|
||||
|
||||
static PyObject *fpe_error;
|
||||
|
||||
PyMODINIT_FUNC PyInit_fpectl(void);
|
||||
static PyObject *turnon_sigfpe (PyObject *self,PyObject *args);
|
||||
static PyObject *turnoff_sigfpe (PyObject *self,PyObject *args);
|
||||
|
||||
static PyMethodDef fpectl_methods[] = {
|
||||
{"turnon_sigfpe", (PyCFunction) turnon_sigfpe, METH_VARARGS},
|
||||
{"turnoff_sigfpe", (PyCFunction) turnoff_sigfpe, METH_VARARGS},
|
||||
{0,0}
|
||||
};
|
||||
|
||||
static PyObject *turnon_sigfpe(PyObject *self,PyObject *args)
|
||||
{
|
||||
/* Do any architecture-specific one-time only initialization here. */
|
||||
|
||||
fpe_reset(sigfpe_handler);
|
||||
Py_INCREF (Py_None);
|
||||
return Py_None;
|
||||
}
|
||||
|
||||
static void fpe_reset(Sigfunc *handler)
|
||||
{
|
||||
/* Reset the exception handling machinery, and reset the signal
|
||||
* handler for SIGFPE to the given handler.
|
||||
*/
|
||||
|
||||
/*-- IRIX -----------------------------------------------------------------*/
|
||||
#if defined(sgi)
|
||||
/* See man page on handle_sigfpes -- must link with -lfpe
|
||||
* My usage doesn't follow the man page exactly. Maybe somebody
|
||||
* else can explain handle_sigfpes to me....
|
||||
* cc -c -I/usr/local/python/include fpectlmodule.c
|
||||
* ld -shared -o fpectlmodule.so fpectlmodule.o -lfpe
|
||||
*/
|
||||
#include <sigfpe.h>
|
||||
typedef void user_routine (unsigned[5], int[2]);
|
||||
typedef void abort_routine (unsigned long);
|
||||
handle_sigfpes(_OFF, 0,
|
||||
(user_routine *)0,
|
||||
_TURN_OFF_HANDLER_ON_ERROR,
|
||||
NULL);
|
||||
handle_sigfpes(_ON, _EN_OVERFL | _EN_DIVZERO | _EN_INVALID,
|
||||
(user_routine *)0,
|
||||
_ABORT_ON_ERROR,
|
||||
NULL);
|
||||
PyOS_setsig(SIGFPE, handler);
|
||||
|
||||
/*-- SunOS and Solaris ----------------------------------------------------*/
|
||||
#elif defined(sun)
|
||||
/* References: ieee_handler, ieee_sun, ieee_functions, and ieee_flags
|
||||
man pages (SunOS or Solaris)
|
||||
cc -c -I/usr/local/python/include fpectlmodule.c
|
||||
ld -G -o fpectlmodule.so -L/opt/SUNWspro/lib fpectlmodule.o -lsunmath -lm
|
||||
*/
|
||||
#include <math.h>
|
||||
#ifndef _SUNMATH_H
|
||||
extern void nonstandard_arithmetic(void);
|
||||
extern int ieee_flags(const char*, const char*, const char*, char **);
|
||||
extern long ieee_handler(const char*, const char*, sigfpe_handler_type);
|
||||
#endif
|
||||
|
||||
char *mode="exception", *in="all", *out;
|
||||
(void) nonstandard_arithmetic();
|
||||
(void) ieee_flags("clearall",mode,in,&out);
|
||||
(void) ieee_handler("set","common",(sigfpe_handler_type)handler);
|
||||
PyOS_setsig(SIGFPE, handler);
|
||||
|
||||
/*-- HPUX -----------------------------------------------------------------*/
|
||||
#elif defined(__hppa) || defined(hppa)
|
||||
/* References: fpsetmask man page */
|
||||
/* cc -Aa +z -c -I/usr/local/python/include fpectlmodule.c */
|
||||
/* ld -b -o fpectlmodule.sl fpectlmodule.o -lm */
|
||||
#include <math.h>
|
||||
fpsetdefaults();
|
||||
PyOS_setsig(SIGFPE, handler);
|
||||
|
||||
/*-- IBM AIX --------------------------------------------------------------*/
|
||||
#elif defined(__AIX) || defined(_AIX)
|
||||
/* References: fp_trap, fp_enable man pages */
|
||||
#include <fptrap.h>
|
||||
fp_trap(FP_TRAP_SYNC);
|
||||
fp_enable(TRP_INVALID | TRP_DIV_BY_ZERO | TRP_OVERFLOW);
|
||||
PyOS_setsig(SIGFPE, handler);
|
||||
|
||||
/*-- DEC ALPHA LINUX ------------------------------------------------------*/
|
||||
#elif defined(__alpha) && defined(linux)
|
||||
#include <asm/fpu.h>
|
||||
unsigned long fp_control =
|
||||
IEEE_TRAP_ENABLE_INV | IEEE_TRAP_ENABLE_DZE | IEEE_TRAP_ENABLE_OVF;
|
||||
ieee_set_fp_control(fp_control);
|
||||
PyOS_setsig(SIGFPE, handler);
|
||||
|
||||
/*-- Cray Unicos ----------------------------------------------------------*/
|
||||
#elif defined(cray)
|
||||
/* UNICOS delivers SIGFPE by default, but no matherr */
|
||||
#ifdef HAS_LIBMSET
|
||||
libmset(-1);
|
||||
#endif
|
||||
PyOS_setsig(SIGFPE, handler);
|
||||
|
||||
/*-- FreeBSD ----------------------------------------------------------------*/
|
||||
#elif defined(__FreeBSD__)
|
||||
fpresetsticky(fpgetsticky());
|
||||
fpsetmask(FP_X_INV | FP_X_DZ | FP_X_OFL);
|
||||
PyOS_setsig(SIGFPE, handler);
|
||||
|
||||
/*-- Linux ----------------------------------------------------------------*/
|
||||
#elif defined(linux)
|
||||
#ifdef __GLIBC__
|
||||
#include <fpu_control.h>
|
||||
#else
|
||||
#include <i386/fpu_control.h>
|
||||
#endif
|
||||
#ifdef _FPU_SETCW
|
||||
{
|
||||
fpu_control_t cw = 0x1372;
|
||||
_FPU_SETCW(cw);
|
||||
}
|
||||
#else
|
||||
__setfpucw(0x1372);
|
||||
#endif
|
||||
PyOS_setsig(SIGFPE, handler);
|
||||
|
||||
/*-- Microsoft Windows, NT ------------------------------------------------*/
|
||||
#elif defined(_MSC_VER)
|
||||
/* Reference: Visual C++ Books Online 4.2,
|
||||
Run-Time Library Reference, _control87, _controlfp */
|
||||
#include <float.h>
|
||||
unsigned int cw = _EM_INVALID | _EM_ZERODIVIDE | _EM_OVERFLOW;
|
||||
(void)_controlfp(0, cw);
|
||||
PyOS_setsig(SIGFPE, handler);
|
||||
|
||||
/*-- Give Up --------------------------------------------------------------*/
|
||||
#else
|
||||
fputs("Operation not implemented\n", stderr);
|
||||
#endif
|
||||
|
||||
}
|
||||
|
||||
static PyObject *turnoff_sigfpe(PyObject *self,PyObject *args)
|
||||
{
|
||||
#ifdef __FreeBSD__
|
||||
fpresetsticky(fpgetsticky());
|
||||
fpsetmask(0);
|
||||
#else
|
||||
fputs("Operation not implemented\n", stderr);
|
||||
#endif
|
||||
Py_INCREF(Py_None);
|
||||
return Py_None;
|
||||
}
|
||||
|
||||
static void sigfpe_handler(int signo)
|
||||
{
|
||||
fpe_reset(sigfpe_handler);
|
||||
if(PyFPE_counter) {
|
||||
longjmp(PyFPE_jbuf, 1);
|
||||
} else {
|
||||
Py_FatalError("Unprotected floating point exception");
|
||||
}
|
||||
}
|
||||
|
||||
static struct PyModuleDef fpectlmodule = {
|
||||
PyModuleDef_HEAD_INIT,
|
||||
"fpectl",
|
||||
NULL,
|
||||
-1,
|
||||
fpectl_methods,
|
||||
NULL,
|
||||
NULL,
|
||||
NULL,
|
||||
NULL
|
||||
};
|
||||
|
||||
PyMODINIT_FUNC PyInit_fpectl(void)
|
||||
{
|
||||
PyObject *m, *d;
|
||||
m = PyModule_Create(&fpectlmodule);
|
||||
if (m == NULL)
|
||||
return NULL;
|
||||
d = PyModule_GetDict(m);
|
||||
fpe_error = PyErr_NewException("fpectl.error", NULL, NULL);
|
||||
if (fpe_error != NULL)
|
||||
PyDict_SetItemString(d, "error", fpe_error);
|
||||
return m;
|
||||
}
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
Loading…
Add table
Add a link
Reference in a new issue