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378 lines
7.4 KiB
C
378 lines
7.4 KiB
C
#include <stdio.h>
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#include <string.h>
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#include "arith.h"
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#define TYSHORT 2
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#define TYLONG 3
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#define TYREAL 4
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#define TYDREAL 5
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#define TYCOMPLEX 6
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#define TYDCOMPLEX 7
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#define TYINT1 11
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#define TYQUAD 14
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#ifndef Long
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#define Long long
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#endif
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#ifdef __mips
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#define RNAN 0xffc00000
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#define DNAN0 0xfff80000
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#define DNAN1 0
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#endif
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#ifdef _PA_RISC1_1
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#define RNAN 0xffc00000
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#define DNAN0 0xfff80000
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#define DNAN1 0
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#endif
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#ifndef RNAN
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#define RNAN 0xff800001
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#ifdef IEEE_MC68k
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#define DNAN0 0xfff00000
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#define DNAN1 1
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#else
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#define DNAN0 1
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#define DNAN1 0xfff00000
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#endif
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#endif /*RNAN*/
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#ifdef KR_headers
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#define Void /*void*/
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#define FA7UL (unsigned Long) 0xfa7a7a7aL
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#else
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#define Void void
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#define FA7UL 0xfa7a7a7aUL
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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static void ieee0(Void);
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static unsigned Long rnan = RNAN,
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dnan0 = DNAN0,
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dnan1 = DNAN1;
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double _0 = 0.;
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void
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#ifdef KR_headers
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_uninit_f2c(x, type, len) void *x; int type; long len;
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#else
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_uninit_f2c(void *x, int type, long len)
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#endif
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{
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static int first = 1;
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unsigned Long *lx, *lxe;
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if (first) {
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first = 0;
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ieee0();
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}
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if (len == 1)
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switch(type) {
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case TYINT1:
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*(char*)x = 'Z';
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return;
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case TYSHORT:
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*(short*)x = 0xfa7a;
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break;
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case TYLONG:
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*(unsigned Long*)x = FA7UL;
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return;
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case TYQUAD:
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case TYCOMPLEX:
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case TYDCOMPLEX:
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break;
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case TYREAL:
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*(unsigned Long*)x = rnan;
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return;
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case TYDREAL:
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lx = (unsigned Long*)x;
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lx[0] = dnan0;
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lx[1] = dnan1;
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return;
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default:
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printf("Surprise type %d in _uninit_f2c\n", type);
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}
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switch(type) {
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case TYINT1:
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memset(x, 'Z', len);
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break;
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case TYSHORT:
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*(short*)x = 0xfa7a;
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break;
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case TYQUAD:
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len *= 2;
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/* no break */
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case TYLONG:
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lx = (unsigned Long*)x;
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lxe = lx + len;
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while(lx < lxe)
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*lx++ = FA7UL;
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break;
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case TYCOMPLEX:
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len *= 2;
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/* no break */
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case TYREAL:
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lx = (unsigned Long*)x;
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lxe = lx + len;
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while(lx < lxe)
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*lx++ = rnan;
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break;
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case TYDCOMPLEX:
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len *= 2;
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/* no break */
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case TYDREAL:
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lx = (unsigned Long*)x;
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for(lxe = lx + 2*len; lx < lxe; lx += 2) {
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lx[0] = dnan0;
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lx[1] = dnan1;
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}
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}
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}
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#ifdef __cplusplus
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}
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#endif
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#ifndef MSpc
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#ifdef MSDOS
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#define MSpc
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#else
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#ifdef _WIN32
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#define MSpc
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#endif
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#endif
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#endif
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#ifdef MSpc
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#define IEEE0_done
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#include "float.h"
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#include "signal.h"
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static void
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ieee0(Void)
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{
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#ifndef __alpha
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#ifndef EM_DENORMAL
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#define EM_DENORMAL _EM_DENORMAL
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#endif
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#ifndef EM_UNDERFLOW
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#define EM_UNDERFLOW _EM_UNDERFLOW
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#endif
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#ifndef EM_INEXACT
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#define EM_INEXACT _EM_INEXACT
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#endif
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#ifndef MCW_EM
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#define MCW_EM _MCW_EM
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#endif
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_control87(EM_DENORMAL | EM_UNDERFLOW | EM_INEXACT, MCW_EM);
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#endif
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/* With MS VC++, compiling and linking with -Zi will permit */
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/* clicking to invoke the MS C++ debugger, which will show */
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/* the point of error -- provided SIGFPE is SIG_DFL. */
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signal(SIGFPE, SIG_DFL);
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}
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#endif /* MSpc */
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#ifdef __mips /* must link with -lfpe */
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#define IEEE0_done
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/* code from Eric Grosse */
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#include <stdlib.h>
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#include <stdio.h>
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#include "/usr/include/sigfpe.h" /* full pathname for lcc -N */
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#include "/usr/include/sys/fpu.h"
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static void
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#ifdef KR_headers
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ieeeuserhand(exception, val) unsigned exception[5]; int val[2];
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#else
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ieeeuserhand(unsigned exception[5], int val[2])
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#endif
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{
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fflush(stdout);
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fprintf(stderr,"ieee0() aborting because of ");
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if(exception[0]==_OVERFL) fprintf(stderr,"overflow\n");
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else if(exception[0]==_UNDERFL) fprintf(stderr,"underflow\n");
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else if(exception[0]==_DIVZERO) fprintf(stderr,"divide by 0\n");
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else if(exception[0]==_INVALID) fprintf(stderr,"invalid operation\n");
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else fprintf(stderr,"\tunknown reason\n");
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fflush(stderr);
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abort();
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}
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static void
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#ifdef KR_headers
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ieeeuserhand2(j) unsigned int **j;
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#else
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ieeeuserhand2(unsigned int **j)
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#endif
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{
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fprintf(stderr,"ieee0() aborting because of confusion\n");
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abort();
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}
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static void
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ieee0(Void)
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{
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int i;
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for(i=1; i<=4; i++){
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sigfpe_[i].count = 1000;
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sigfpe_[i].trace = 1;
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sigfpe_[i].repls = _USER_DETERMINED;
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}
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sigfpe_[1].repls = _ZERO; /* underflow */
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handle_sigfpes( _ON,
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_EN_UNDERFL|_EN_OVERFL|_EN_DIVZERO|_EN_INVALID,
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ieeeuserhand,_ABORT_ON_ERROR,ieeeuserhand2);
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}
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#endif /* mips */
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#ifdef __linux__
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#define IEEE0_done
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#include "fpu_control.h"
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#ifdef __alpha__
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#ifndef USE_setfpucw
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#define __setfpucw(x) __fpu_control = (x)
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#endif
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#endif
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#ifndef _FPU_SETCW
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#undef Can_use__setfpucw
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#define Can_use__setfpucw
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#endif
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static void
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ieee0(Void)
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{
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#if (defined(__mc68000__) || defined(__mc68020__) || defined(mc68020) || defined (__mc68k__))
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/* Reported 20010705 by Alan Bain <alanb@chiark.greenend.org.uk> */
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/* Note that IEEE 754 IOP (illegal operation) */
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/* = Signaling NAN (SNAN) + operation error (OPERR). */
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#ifdef Can_use__setfpucw
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__setfpucw(_FPU_IEEE + _FPU_DOUBLE + _FPU_MASK_OPERR + _FPU_MASK_DZ + _FPU_MASK_SNAN+_FPU_MASK_OVFL);
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#else
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__fpu_control = _FPU_IEEE + _FPU_DOUBLE + _FPU_MASK_OPERR + _FPU_MASK_DZ + _FPU_MASK_SNAN+_FPU_MASK_OVFL;
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_FPU_SETCW(__fpu_control);
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#endif
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#elif (defined(__powerpc__)||defined(_ARCH_PPC)||defined(_ARCH_PWR)) /* !__mc68k__ */
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/* Reported 20011109 by Alan Bain <alanb@chiark.greenend.org.uk> */
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#ifdef Can_use__setfpucw
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/* The following is NOT a mistake -- the author of the fpu_control.h
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for the PPC has erroneously defined IEEE mode to turn on exceptions
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other than Inexact! Start from default then and turn on only the ones
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which we want*/
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__setfpucw(_FPU_DEFAULT + _FPU_MASK_IM+_FPU_MASK_OM+_FPU_MASK_UM);
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#else /* PPC && !Can_use__setfpucw */
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__fpu_control = _FPU_DEFAULT +_FPU_MASK_OM+_FPU_MASK_IM+_FPU_MASK_UM;
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_FPU_SETCW(__fpu_control);
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#endif /*Can_use__setfpucw*/
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#else /* !(mc68000||powerpc) */
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#ifdef _FPU_IEEE
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#ifndef _FPU_EXTENDED /* e.g., ARM processor under Linux */
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#define _FPU_EXTENDED 0
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#endif
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#ifndef _FPU_DOUBLE
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#define _FPU_DOUBLE 0
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#endif
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#ifdef Can_use__setfpucw /* pre-1997 (?) Linux */
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__setfpucw(_FPU_IEEE - _FPU_MASK_IM - _FPU_MASK_ZM - _FPU_MASK_OM);
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#else
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#ifdef UNINIT_F2C_PRECISION_53 /* 20051004 */
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/* unmask invalid, etc., and change rounding precision to double */
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__fpu_control = _FPU_IEEE - _FPU_EXTENDED + _FPU_DOUBLE - _FPU_MASK_IM - _FPU_MASK_ZM - _FPU_MASK_OM;
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_FPU_SETCW(__fpu_control);
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#else
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/* unmask invalid, etc., and keep current rounding precision */
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fpu_control_t cw;
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_FPU_GETCW(cw);
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cw &= ~(_FPU_MASK_IM | _FPU_MASK_ZM | _FPU_MASK_OM);
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_FPU_SETCW(cw);
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#endif
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#endif
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#else /* !_FPU_IEEE */
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fprintf(stderr, "\n%s\n%s\n%s\n%s\n",
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"WARNING: _uninit_f2c in libf2c does not know how",
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"to enable trapping on this system, so f2c's -trapuv",
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"option will not detect uninitialized variables unless",
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"you can enable trapping manually.");
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fflush(stderr);
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#endif /* _FPU_IEEE */
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#endif /* __mc68k__ */
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}
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#endif /* __linux__ */
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#ifdef __alpha
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#ifndef IEEE0_done
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#define IEEE0_done
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#include <machine/fpu.h>
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static void
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ieee0(Void)
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{
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ieee_set_fp_control(IEEE_TRAP_ENABLE_INV);
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}
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#endif /*IEEE0_done*/
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#endif /*__alpha*/
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#ifdef __hpux
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#define IEEE0_done
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#define _INCLUDE_HPUX_SOURCE
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#include <math.h>
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#ifndef FP_X_INV
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#include <fenv.h>
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#define fpsetmask fesettrapenable
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#define FP_X_INV FE_INVALID
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#endif
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static void
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ieee0(Void)
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{
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fpsetmask(FP_X_INV);
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}
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#endif /*__hpux*/
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#ifdef _AIX
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#define IEEE0_done
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#include <fptrap.h>
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static void
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ieee0(Void)
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{
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fp_enable(TRP_INVALID);
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fp_trap(FP_TRAP_SYNC);
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}
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#endif /*_AIX*/
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#ifdef __sun
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#define IEEE0_done
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#include <ieeefp.h>
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static void
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ieee0(Void)
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{
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fpsetmask(FP_X_INV);
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}
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#endif /*__sparc*/
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#ifndef IEEE0_done
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static void
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ieee0(Void) {}
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#endif
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