diff options
Diffstat (limited to 'sysdeps/ieee754/dbl-64/e_remainder.c')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/e_remainder.c | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/sysdeps/ieee754/dbl-64/e_remainder.c b/sysdeps/ieee754/dbl-64/e_remainder.c deleted file mode 100644 index 1a2eeed2e1..0000000000 --- a/sysdeps/ieee754/dbl-64/e_remainder.c +++ /dev/null @@ -1,152 +0,0 @@ -/* - * IBM Accurate Mathematical Library - * written by International Business Machines Corp. - * Copyright (C) 2001-2017 Free Software Foundation, Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License as published by - * the Free Software Foundation; either version 2.1 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public License - * along with this program; if not, see <http://www.gnu.org/licenses/>. - */ -/**************************************************************************/ -/* MODULE_NAME urem.c */ -/* */ -/* FUNCTION: uremainder */ -/* */ -/* An ultimate remainder routine. Given two IEEE double machine numbers x */ -/* ,y it computes the correctly rounded (to nearest) value of remainder */ -/* of dividing x by y. */ -/* Assumption: Machine arithmetic operations are performed in */ -/* round to nearest mode of IEEE 754 standard. */ -/* */ -/* ************************************************************************/ - -#include "endian.h" -#include "mydefs.h" -#include "urem.h" -#include "MathLib.h" -#include <math.h> -#include <math_private.h> - -/**************************************************************************/ -/* An ultimate remainder routine. Given two IEEE double machine numbers x */ -/* ,y it computes the correctly rounded (to nearest) value of remainder */ -/**************************************************************************/ -double -__ieee754_remainder (double x, double y) -{ - double z, d, xx; - int4 kx, ky, n, nn, n1, m1, l; - mynumber u, t, w = { { 0, 0 } }, v = { { 0, 0 } }, ww = { { 0, 0 } }, r; - u.x = x; - t.x = y; - kx = u.i[HIGH_HALF] & 0x7fffffff; /* no sign for x*/ - t.i[HIGH_HALF] &= 0x7fffffff; /*no sign for y */ - ky = t.i[HIGH_HALF]; - /*------ |x| < 2^1023 and 2^-970 < |y| < 2^1024 ------------------*/ - if (kx < 0x7fe00000 && ky < 0x7ff00000 && ky >= 0x03500000) - { - SET_RESTORE_ROUND_NOEX (FE_TONEAREST); - if (kx + 0x00100000 < ky) - return x; - if ((kx - 0x01500000) < ky) - { - z = x / t.x; - v.i[HIGH_HALF] = t.i[HIGH_HALF]; - d = (z + big.x) - big.x; - xx = (x - d * v.x) - d * (t.x - v.x); - if (d - z != 0.5 && d - z != -0.5) - return (xx != 0) ? xx : ((x > 0) ? ZERO.x : nZERO.x); - else - { - if (fabs (xx) > 0.5 * t.x) - return (z > d) ? xx - t.x : xx + t.x; - else - return xx; - } - } /* (kx<(ky+0x01500000)) */ - else - { - r.x = 1.0 / t.x; - n = t.i[HIGH_HALF]; - nn = (n & 0x7ff00000) + 0x01400000; - w.i[HIGH_HALF] = n; - ww.x = t.x - w.x; - l = (kx - nn) & 0xfff00000; - n1 = ww.i[HIGH_HALF]; - m1 = r.i[HIGH_HALF]; - while (l > 0) - { - r.i[HIGH_HALF] = m1 - l; - z = u.x * r.x; - w.i[HIGH_HALF] = n + l; - ww.i[HIGH_HALF] = (n1) ? n1 + l : n1; - d = (z + big.x) - big.x; - u.x = (u.x - d * w.x) - d * ww.x; - l = (u.i[HIGH_HALF] & 0x7ff00000) - nn; - } - r.i[HIGH_HALF] = m1; - w.i[HIGH_HALF] = n; - ww.i[HIGH_HALF] = n1; - z = u.x * r.x; - d = (z + big.x) - big.x; - u.x = (u.x - d * w.x) - d * ww.x; - if (fabs (u.x) < 0.5 * t.x) - return (u.x != 0) ? u.x : ((x > 0) ? ZERO.x : nZERO.x); - else - if (fabs (u.x) > 0.5 * t.x) - return (d > z) ? u.x + t.x : u.x - t.x; - else - { - z = u.x / t.x; d = (z + big.x) - big.x; - return ((u.x - d * w.x) - d * ww.x); - } - } - } /* (kx<0x7fe00000&&ky<0x7ff00000&&ky>=0x03500000) */ - else - { - if (kx < 0x7fe00000 && ky < 0x7ff00000 && (ky > 0 || t.i[LOW_HALF] != 0)) - { - y = fabs (y) * t128.x; - z = __ieee754_remainder (x, y) * t128.x; - z = __ieee754_remainder (z, y) * tm128.x; - return z; - } - else - { - if ((kx & 0x7ff00000) == 0x7fe00000 && ky < 0x7ff00000 && - (ky > 0 || t.i[LOW_HALF] != 0)) - { - y = fabs (y); - z = 2.0 * __ieee754_remainder (0.5 * x, y); - d = fabs (z); - if (d <= fabs (d - y)) - return z; - else if (d == y) - return 0.0 * x; - else - return (z > 0) ? z - y : z + y; - } - else /* if x is too big */ - { - if (ky == 0 && t.i[LOW_HALF] == 0) /* y = 0 */ - return (x * y) / (x * y); - else if (kx >= 0x7ff00000 /* x not finite */ - || (ky > 0x7ff00000 /* y is NaN */ - || (ky == 0x7ff00000 && t.i[LOW_HALF] != 0))) - return (x * y) / (x * y); - else - return x; - } - } - } -} -strong_alias (__ieee754_remainder, __remainder_finite) |