diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128/e_fmodl.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/e_fmodl.c | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/sysdeps/ieee754/ldbl-128/e_fmodl.c b/sysdeps/ieee754/ldbl-128/e_fmodl.c deleted file mode 100644 index f27cd4f8ff..0000000000 --- a/sysdeps/ieee754/ldbl-128/e_fmodl.c +++ /dev/null @@ -1,131 +0,0 @@ -/* e_fmodl.c -- long double version of e_fmod.c. - * Conversion to IEEE quad long double by Jakub Jelinek, jj@ultra.linux.cz. - */ -/* - * ==================================================== - * Copyright (C) 1993, 2011 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. - * ==================================================== - */ - -/* - * __ieee754_fmodl(x,y) - * Return x mod y in exact arithmetic - * Method: shift and subtract - */ - -#include <math.h> -#include <math_private.h> - -static const _Float128 one = 1.0, Zero[] = {0.0, -0.0,}; - -_Float128 -__ieee754_fmodl (_Float128 x, _Float128 y) -{ - int64_t n,hx,hy,hz,ix,iy,sx,i; - u_int64_t lx,ly,lz; - - GET_LDOUBLE_WORDS64(hx,lx,x); - GET_LDOUBLE_WORDS64(hy,ly,y); - sx = hx&0x8000000000000000ULL; /* sign of x */ - hx ^=sx; /* |x| */ - hy &= 0x7fffffffffffffffLL; /* |y| */ - - /* purge off exception values */ - if((hy|ly)==0||(hx>=0x7fff000000000000LL)|| /* y=0,or x not finite */ - ((hy|((ly|-ly)>>63))>0x7fff000000000000LL)) /* or y is NaN */ - return (x*y)/(x*y); - if(hx<=hy) { - if((hx<hy)||(lx<ly)) return x; /* |x|<|y| return x */ - if(lx==ly) - return Zero[(u_int64_t)sx>>63]; /* |x|=|y| return x*0*/ - } - - /* determine ix = ilogb(x) */ - if(hx<0x0001000000000000LL) { /* subnormal x */ - if(hx==0) { - for (ix = -16431, i=lx; i>0; i<<=1) ix -=1; - } else { - for (ix = -16382, i=hx<<15; i>0; i<<=1) ix -=1; - } - } else ix = (hx>>48)-0x3fff; - - /* determine iy = ilogb(y) */ - if(hy<0x0001000000000000LL) { /* subnormal y */ - if(hy==0) { - for (iy = -16431, i=ly; i>0; i<<=1) iy -=1; - } else { - for (iy = -16382, i=hy<<15; i>0; i<<=1) iy -=1; - } - } else iy = (hy>>48)-0x3fff; - - /* set up {hx,lx}, {hy,ly} and align y to x */ - if(ix >= -16382) - hx = 0x0001000000000000LL|(0x0000ffffffffffffLL&hx); - else { /* subnormal x, shift x to normal */ - n = -16382-ix; - if(n<=63) { - hx = (hx<<n)|(lx>>(64-n)); - lx <<= n; - } else { - hx = lx<<(n-64); - lx = 0; - } - } - if(iy >= -16382) - hy = 0x0001000000000000LL|(0x0000ffffffffffffLL&hy); - else { /* subnormal y, shift y to normal */ - n = -16382-iy; - if(n<=63) { - hy = (hy<<n)|(ly>>(64-n)); - ly <<= n; - } else { - hy = ly<<(n-64); - ly = 0; - } - } - - /* fix point fmod */ - n = ix - iy; - while(n--) { - hz=hx-hy;lz=lx-ly; if(lx<ly) hz -= 1; - if(hz<0){hx = hx+hx+(lx>>63); lx = lx+lx;} - else { - if((hz|lz)==0) /* return sign(x)*0 */ - return Zero[(u_int64_t)sx>>63]; - hx = hz+hz+(lz>>63); lx = lz+lz; - } - } - hz=hx-hy;lz=lx-ly; if(lx<ly) hz -= 1; - if(hz>=0) {hx=hz;lx=lz;} - - /* convert back to floating value and restore the sign */ - if((hx|lx)==0) /* return sign(x)*0 */ - return Zero[(u_int64_t)sx>>63]; - while(hx<0x0001000000000000LL) { /* normalize x */ - hx = hx+hx+(lx>>63); lx = lx+lx; - iy -= 1; - } - if(iy>= -16382) { /* normalize output */ - hx = ((hx-0x0001000000000000LL)|((iy+16383)<<48)); - SET_LDOUBLE_WORDS64(x,hx|sx,lx); - } else { /* subnormal output */ - n = -16382 - iy; - if(n<=48) { - lx = (lx>>n)|((u_int64_t)hx<<(64-n)); - hx >>= n; - } else if (n<=63) { - lx = (hx<<(64-n))|(lx>>n); hx = sx; - } else { - lx = hx>>(n-64); hx = sx; - } - SET_LDOUBLE_WORDS64(x,hx|sx,lx); - x *= one; /* create necessary signal */ - } - return x; /* exact output */ -} -strong_alias (__ieee754_fmodl, __fmodl_finite) |