mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-21 04:31:04 +08:00
220622dde5
This patch adds a new macro, libm_alias_finite, to define all _finite symbol. It sets all _finite symbol as compat symbol based on its first version (obtained from the definition at built generated first-versions.h). The <fn>f128_finite symbols were introduced in GLIBC 2.26 and so need special treatment in code that is shared between long double and float128. It is done by adding a list, similar to internal symbol redifinition, on sysdeps/ieee754/float128/float128_private.h. Alpha also needs some tricky changes to ensure we still emit 2 compat symbols for sqrt(f). Passes buildmanyglibc. Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
/* e_remainderf.c -- float version of e_remainder.c.
|
|
* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
|
|
*/
|
|
|
|
/*
|
|
* ====================================================
|
|
* 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.
|
|
* ====================================================
|
|
*/
|
|
|
|
#include <math.h>
|
|
#include <math_private.h>
|
|
#include <libm-alias-finite.h>
|
|
|
|
static const float zero = 0.0;
|
|
|
|
|
|
float
|
|
__ieee754_remainderf(float x, float p)
|
|
{
|
|
int32_t hx,hp;
|
|
uint32_t sx;
|
|
float p_half;
|
|
|
|
GET_FLOAT_WORD(hx,x);
|
|
GET_FLOAT_WORD(hp,p);
|
|
sx = hx&0x80000000;
|
|
hp &= 0x7fffffff;
|
|
hx &= 0x7fffffff;
|
|
|
|
/* purge off exception values */
|
|
if(hp==0) return (x*p)/(x*p); /* p = 0 */
|
|
if((hx>=0x7f800000)|| /* x not finite */
|
|
((hp>0x7f800000))) /* p is NaN */
|
|
return (x*p)/(x*p);
|
|
|
|
|
|
if (hp<=0x7effffff) x = __ieee754_fmodf(x,p+p); /* now x < 2p */
|
|
if ((hx-hp)==0) return zero*x;
|
|
x = fabsf(x);
|
|
p = fabsf(p);
|
|
if (hp<0x01000000) {
|
|
if(x+x>p) {
|
|
x-=p;
|
|
if(x+x>=p) x -= p;
|
|
}
|
|
} else {
|
|
p_half = (float)0.5*p;
|
|
if(x>p_half) {
|
|
x-=p;
|
|
if(x>=p_half) x -= p;
|
|
}
|
|
}
|
|
GET_FLOAT_WORD(hx,x);
|
|
SET_FLOAT_WORD(x,hx^sx);
|
|
return x;
|
|
}
|
|
libm_alias_finite (__ieee754_remainderf, __remainderf)
|