mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-16 01:50:11 +00:00
3c6cad26ae
* sysdeps/i386/fpu/libm-test-ulps: Update for changes in libm-test.inc. 2000-10-16 Jakub Jelinek <jakub@redhat.com> * math/libm-test.inc (M_LOG_SQRT_PIl, M_LOG_2_SQRT_PIl): Increase precision. (acos_test, asin_text, cexp_test, cos_test, cproj_test, exp10_test, sin_test, sincos_test, sqrt_test): Likewise. Add L suffixes also to parameters. (acosh_test, asinh_test, atan2_test, atanh_test, atan_test, cabs_test, cacosh_test, cacos_test, casinh_test, casin_test, catanh_test, catan_test, cbrt_test, ccosh_test, ccos_test, clog10_test, cosh_test, csinh_test, csin_test, csqrt_test, ctanh_test, ctan_test, erfc_test, erf_test, exp2_test, expm1_test, exp_test, fmod_test, hypot_test, j0_test, j1_test, jn_test, lgamma_test, llrint_test, llround_test, log10_test, log1p_test, log2_test, log_test, lrint_test, lround_test, nextafter_test, nexttoward_test, pow_test, round_test, scalb_test, sinh_test, static void, tanh_test, tan_test, tgamma_test, y0_test, y1_test, yn_test): Add L suffixes also to parameters. * sysdeps/ieee754/ldbl-128/s_ceill.c (__ceill): Fix mask. * sysdeps/ieee754/ldbl-128/s_floorl.c (__floorl): Likewise. * soft-fp/op-2.h (_FP_FRAC_SRS_2): Fix computation of sticky bit. 2000-10-16 Ulrich Drepper <drepper@redhat.com>
85 lines
2.0 KiB
C
85 lines
2.0 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.
|
|
* Exception:
|
|
* Inexact flag raised if x not equal to ceil(x).
|
|
*/
|
|
|
|
#include "math.h"
|
|
#include "math_private.h"
|
|
|
|
#ifdef __STDC__
|
|
static const long double huge = 1.0e4930;
|
|
#else
|
|
static long double huge = 1.0e4930;
|
|
#endif
|
|
|
|
#ifdef __STDC__
|
|
long double __ceill(long double x)
|
|
#else
|
|
long double __ceill(x)
|
|
long double x;
|
|
#endif
|
|
{
|
|
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) { /* raise inexact if x != 0 */
|
|
if(huge+x>0.0) {/* 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(huge+x>0.0) { /* raise inexact flag */
|
|
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(huge+x>0.0) { /* raise inexact flag */
|
|
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)
|