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authorUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
committerUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
commita334319f6530564d22e775935d9c91663623a1b4 (patch)
treeb5877475619e4c938e98757d518bb1e9cbead751 /sysdeps/ieee754/ldbl-128ibm/e_fmodl.c
parent0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (diff)
downloadglibc-a334319f6530564d22e775935d9c91663623a1b4.tar.gz
(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.
Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/e_fmodl.c')
-rw-r--r--sysdeps/ieee754/ldbl-128ibm/e_fmodl.c145
1 files changed, 0 insertions, 145 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/e_fmodl.c b/sysdeps/ieee754/ldbl-128ibm/e_fmodl.c
deleted file mode 100644
index e99b0bac34..0000000000
--- a/sysdeps/ieee754/ldbl-128ibm/e_fmodl.c
+++ /dev/null
@@ -1,145 +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 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"
-#include <ieee754.h>
-
-#ifdef __STDC__
-static const long double one = 1.0, Zero[] = {0.0, -0.0,};
-#else
-static long double one = 1.0, Zero[] = {0.0, -0.0,};
-#endif
-
-#ifdef __STDC__
- long double __ieee754_fmodl(long double x, long double y)
-#else
- long double __ieee754_fmodl(x,y)
- long double x,y;
-#endif
-{
- int64_t n,hx,hy,hz,ix,iy,sx,i;
- u_int64_t lx,ly,lz;
- int temp;
-
- 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&0x7fffffffffffffff))==0||(hx>=0x7ff0000000000000LL)|| /* y=0,or x not finite */
- (hy>0x7ff0000000000000LL)) /* 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<0x0010000000000000LL) { /* subnormal x */
- if(hx==0) {
- for (ix = -1043, i=lx; i>0; i<<=1) ix -=1;
- } else {
- for (ix = -1022, i=hx<<19; i>0; i<<=1) ix -=1;
- }
- } else ix = (hx>>52)-0x3ff;
-
- /* determine iy = ilogb(y) */
- if(hy<0x0010000000000000LL) { /* subnormal y */
- if(hy==0) {
- for (iy = -1043, i=ly; i>0; i<<=1) iy -=1;
- } else {
- for (iy = -1022, i=hy<<19; i>0; i<<=1) iy -=1;
- }
- } else iy = (hy>>52)-0x3ff;
-
- /* Make the IBM extended format 105 bit mantissa look like the ieee854 112
- bit mantissa so the following operatations will give the correct
- result. */
- ldbl_extract_mantissa(&hx, &lx, &temp, x);
- ldbl_extract_mantissa(&hy, &ly, &temp, y);
-
- /* set up {hx,lx}, {hy,ly} and align y to x */
- if(ix >= -1022)
- hx = 0x0001000000000000LL|(0x0000ffffffffffffLL&hx);
- else { /* subnormal x, shift x to normal */
- n = -1022-ix;
- if(n<=63) {
- hx = (hx<<n)|(lx>>(64-n));
- lx <<= n;
- } else {
- hx = lx<<(n-64);
- lx = 0;
- }
- }
- if(iy >= -1022)
- hy = 0x0001000000000000LL|(0x0000ffffffffffffLL&hy);
- else { /* subnormal y, shift y to normal */
- n = -1022-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&0x7fffffffffffffff))==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&0x7fffffffffffffff))==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>= -1022) { /* normalize output */
- x = ldbl_insert_mantissa((sx>>63), iy, hx, lx);
- } else { /* subnormal output */
- n = -1022 - 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;
- }
- x = ldbl_insert_mantissa((sx>>63), iy, hx, lx);
- x *= one; /* create necessary signal */
- }
- return x; /* exact output */
-}