mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-01 17:30:07 +00:00
15089e046b
Add a layer of macro indirection for long double files which need to be built using another typename. Likewise, add the L(num) macro used in a later patch to override real constants. These macros are only defined through the ldbl-128 math_ldbl.h header, thereby implicitly restricting these macros to machines which back long double with an IEEE binary128 format. Likewise, appropriate changes are made for the few files which indirectly include such ldbl-128 files. These changes produce identical binaries for s390x, aarch64, and ppc64.
67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
/* s_ceill.c -- long double version of s_ceil.c.
|
|
* Conversion to IEEE quad long double by Jakub Jelinek, jj@ultra.linux.cz.
|
|
*/
|
|
|
|
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
* Developed at SunPro, a Sun Microsystems, Inc. business.
|
|
* Permission to use, copy, modify, and distribute this
|
|
* software is freely granted, provided that this notice
|
|
* is preserved.
|
|
* ====================================================
|
|
*/
|
|
|
|
#if defined(LIBM_SCCS) && !defined(lint)
|
|
static char rcsid[] = "$NetBSD: $";
|
|
#endif
|
|
|
|
/*
|
|
* ceill(x)
|
|
* Return x rounded toward -inf to integral value
|
|
* Method:
|
|
* Bit twiddling.
|
|
*/
|
|
|
|
#include <math.h>
|
|
#include <math_private.h>
|
|
|
|
_Float128 __ceill(_Float128 x)
|
|
{
|
|
int64_t i0,i1,j0;
|
|
u_int64_t i,j;
|
|
GET_LDOUBLE_WORDS64(i0,i1,x);
|
|
j0 = ((i0>>48)&0x7fff)-0x3fff;
|
|
if(j0<48) {
|
|
if(j0<0) {
|
|
/* return 0*sign(x) if |x|<1 */
|
|
if(i0<0) {i0=0x8000000000000000ULL;i1=0;}
|
|
else if((i0|i1)!=0) { i0=0x3fff000000000000ULL;i1=0;}
|
|
} else {
|
|
i = (0x0000ffffffffffffULL)>>j0;
|
|
if(((i0&i)|i1)==0) return x; /* x is integral */
|
|
if(i0>0) i0 += (0x0001000000000000LL)>>j0;
|
|
i0 &= (~i); i1=0;
|
|
}
|
|
} else if (j0>111) {
|
|
if(j0==0x4000) return x+x; /* inf or NaN */
|
|
else return x; /* x is integral */
|
|
} else {
|
|
i = -1ULL>>(j0-48);
|
|
if((i1&i)==0) return x; /* x is integral */
|
|
if(i0>0) {
|
|
if(j0==48) i0+=1;
|
|
else {
|
|
j = i1+(1LL<<(112-j0));
|
|
if(j<i1) i0 +=1 ; /* got a carry */
|
|
i1=j;
|
|
}
|
|
}
|
|
i1 &= (~i);
|
|
}
|
|
SET_LDOUBLE_WORDS64(x,i0,i1);
|
|
return x;
|
|
}
|
|
weak_alias (__ceill, ceill)
|