diff options
Diffstat (limited to 'sysdeps/powerpc/fpu/e_rem_pio2f.c')
| -rw-r--r-- | sysdeps/powerpc/fpu/e_rem_pio2f.c | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/sysdeps/powerpc/fpu/e_rem_pio2f.c b/sysdeps/powerpc/fpu/e_rem_pio2f.c deleted file mode 100644 index 30fd53ee2c..0000000000 --- a/sysdeps/powerpc/fpu/e_rem_pio2f.c +++ /dev/null @@ -1,188 +0,0 @@ -/* e_rem_pio2f.c -- float version of e_rem_pio2.c - Copyright (C) 2011-2018 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Adhemerval Zanella <azanella@br.ibm.com>, 2011 - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library 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 - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If - not, see <http://www.gnu.org/licenses/>. */ - -#include <math.h> - -#include <math_private.h> -#include "s_float_bitwise.h" - -/* defined in sysdeps/powerpc/fpu/k_rem_pio2f.c */ -int __fp_kernel_rem_pio2f (float *x, float *y, float e0, int32_t nx); - -/* __ieee754_rem_pio2f(x,y) - * - * return the remainder of x rem pi/2 in y[0]+y[1] - */ - -static const float npio2_hw[] = { - 1.57077026e+00, 3.14154053e+00, 4.71228027e+00, 6.28308105e+00, - 7.85388184e+00, 9.42456055e+00, 1.09953613e+01, 1.25661621e+01, - 1.41369629e+01, 1.57077637e+01, 1.72783203e+01, 1.88491211e+01, - 2.04199219e+01, 2.19907227e+01, 2.35615234e+01, 2.51323242e+01, - 2.67031250e+01, 2.82739258e+01, 2.98447266e+01, 3.14155273e+01, - 3.29863281e+01, 3.45566406e+01, 3.61279297e+01, 3.76982422e+01, - 3.92695312e+01, 4.08398438e+01, 4.24111328e+01, 4.39814453e+01, - 4.55527344e+01, 4.71230469e+01, 4.86943359e+01, 5.02646484e+01 -}; - - -static const float zero = 0.0000000000e+00; -static const float two8 = 2.5600000000e+02; - -static const float half = 5.0000000000e-01; -static const float invpio2 = 6.3661980629e-01; -static const float pio2_1 = 1.5707855225e+00; -static const float pio2_1t = 1.0804334124e-05; -static const float pio2_2 = 1.0804273188e-05; -static const float pio2_2t = 6.0770999344e-11; -static const float pio2_3 = 6.0770943833e-11; -static const float pio2_3t = 6.1232342629e-17; - -static const float pio4 = 7.8539801e-01; -static const float pio3_4 = 2.3561945e+00; -static const float pio2_24b = 1.5707951e+00; -static const float pio2_2e7 = 2.0106054e+02; - - -int32_t -__ieee754_rem_pio2f (float x, float *y) -{ - float ax, z, n, r, w, t, e0; - float tx[3]; - int32_t i, nx; - - ax = __builtin_fabsf (x); - if (ax <= pio4) - { - y[0] = x; - y[1] = 0; - return 0; - } - if (ax < pio3_4) - { - if (x > 0) - { - z = x - pio2_1; - if (!__float_and_test28 (ax, pio2_24b)) - { - y[0] = z - pio2_1t; - y[1] = (z - y[0]) - pio2_1t; - } - else - { - z -= pio2_2; - y[0] = z - pio2_2t; - y[1] = (z - y[0]) - pio2_2t; - } - return 1; - } - else - { - z = x + pio2_1; - if (!__float_and_test28 (ax, pio2_24b)) - { - y[0] = z + pio2_1t; - y[1] = (z - y[0]) + pio2_1t; - } - else - { - z += pio2_2; - y[0] = z + pio2_2t; - y[1] = (z - y[0]) + pio2_2t; - } - return -1; - } - } - if (ax <= pio2_2e7) - { - n = __floorf (ax * invpio2 + half); - i = (int32_t) n; - r = ax - n * pio2_1; - w = n * pio2_1t; /* 1st round good to 40 bit */ - if (i < 32 && !__float_and_test24 (ax, npio2_hw[i - 1])) - { - y[0] = r - w; - } - else - { - float i, j; - j = __float_and8 (ax); - y[0] = r - w; - i = __float_and8 (y[0]); - if (j / i > 256.0 || j / i < 3.9062500e-3) - { /* 2nd iterations needed, good to 57 */ - t = r; - w = n * pio2_2; - r = t - w; - w = n * pio2_2t - ((t - r) - w); - y[0] = r - w; - i = __float_and8 (y[0]); - if (j / i > 33554432 || j / i < 2.9802322e-8) - { /* 3rd iteration needed, 74 bits acc */ - t = r; - w = n * pio2_3; - r = t - w; - w = n * pio2_3t - ((t - r) - w); - y[0] = r - w; - } - } - } - y[1] = (r - y[0]) - w; - if (x < 0) - { - y[0] = -y[0]; - y[1] = -y[1]; - return -i; - } - else - { - return i; - } - } - - /* all other (large) arguments */ - if (isnanf (x) || isinff (x)) - { - y[0] = y[1] = x - x; - return 0; - } - - /* set z = scalbn(|x|,ilogb(x)-7) */ - e0 = __float_and8 (ax / 128.0); - z = ax / e0; - - tx[0] = __floorf (z); - z = (z - tx[0]) * two8; - tx[1] = __floorf (z); - z = (z - tx[1]) * two8; - tx[2] = __floorf (z); - - nx = 3; - while (tx[nx - 1] == zero) - nx--; - - i = __fp_kernel_rem_pio2f (tx, y, e0, nx); - if (x < 0) - { - y[0] = -y[0]; - y[1] = -y[1]; - return -i; - } - return i; -} |