version 1.5, 1994/08/10 20:32:25 |
version 1.10, 1999/07/02 15:37:42 |
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* |
* |
* Developed at SunPro, a Sun Microsystems, Inc. business. |
* Developed at SunPro, a Sun Microsystems, Inc. business. |
* Permission to use, copy, modify, and distribute this |
* Permission to use, copy, modify, and distribute this |
* software is freely granted, provided that this notice |
* software is freely granted, provided that this notice |
* is preserved. |
* is preserved. |
* ==================================================== |
* ==================================================== |
*/ |
*/ |
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#ifndef lint |
#include <sys/cdefs.h> |
static char rcsid[] = "$Id$"; |
#if defined(LIBM_SCCS) && !defined(lint) |
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__RCSID("$NetBSD$"); |
#endif |
#endif |
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/* |
/* |
Line 39 static double huge = 1.0e300; |
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Line 40 static double huge = 1.0e300; |
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double x; |
double x; |
#endif |
#endif |
{ |
{ |
int i0,i1,j0; |
int32_t i0,i1,j0; |
unsigned i,j; |
u_int32_t i,j; |
EXTRACT_WORDS(i0,i1,x); |
EXTRACT_WORDS(i0,i1,x); |
j0 = ((i0>>20)&0x7ff)-0x3ff; |
j0 = ((i0>>20)&0x7ff)-0x3ff; |
if(j0<20) { |
if(j0<20) { |
if(j0<0) { /* raise inexact if x != 0 */ |
if(j0<0) { /* raise inexact if x != 0 */ |
if(huge+x>0.0) {/* return 0*sign(x) if |x|<1 */ |
if(huge+x>0.0) {/* return 0*sign(x) if |x|<1 */ |
if(i0>=0) {i0=i1=0;} |
if(i0>=0) {i0=i1=0;} |
else if(((i0&0x7fffffff)|i1)!=0) |
else if(((i0&0x7fffffff)|i1)!=0) |
{ i0=0xbff00000;i1=0;} |
{ i0=0xbff00000;i1=0;} |
} |
} |
Line 62 static double huge = 1.0e300; |
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Line 63 static double huge = 1.0e300; |
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if(j0==0x400) return x+x; /* inf or NaN */ |
if(j0==0x400) return x+x; /* inf or NaN */ |
else return x; /* x is integral */ |
else return x; /* x is integral */ |
} else { |
} else { |
i = ((unsigned)(0xffffffff))>>(j0-20); |
i = ((u_int32_t)(0xffffffff))>>(j0-20); |
if((i1&i)==0) return x; /* x is integral */ |
if((i1&i)==0) return x; /* x is integral */ |
if(huge+x>0.0) { /* raise inexact flag */ |
if(huge+x>0.0) { /* raise inexact flag */ |
if(i0<0) { |
if(i0<0) { |
if(j0==20) i0+=1; |
if(j0==20) i0+=1; |
else { |
else { |
j = i1+(1<<(52-j0)); |
j = i1+(1<<(52-j0)); |
if(j<i1) i0 +=1 ; /* got a carry */ |
if(j<i1) i0 +=1 ; /* got a carry */ |