sysdeps/powerpc/powerpc64/fpu/s_copysignl.S

   1 /* Copy a sign bit between floating-point values.
   2    IBM extended format long double version.
   3    Copyright (C) 2004-2019 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <sysdep.h>
  21 #include <math_ldbl_opt.h>
  22
  23 ENTRY_TOCLESS (__copysignl)
  24 /* long double [f1,f2] copysign (long double [f1,f2] x, long double [f3,f4] y);
  25    copysign(x,y) returns a value with the magnitude of x and
  26    with the sign bit of y.  */
  27         stfd    fp3,-16(r1)
  28         ld      r3,-16(r1)
  29         cmpdi   r3,0
  30         blt     L(0)
  31         fmr     fp0,fp1
  32         fabs    fp1,fp1
  33         fneg    fp3,fp2
  34         fsel    fp2,fp0,fp2,fp3
  35         blr
  36 L(0):
  37         fmr     fp0,fp1
  38         fnabs   fp1,fp1
  39         fneg    fp3,fp2
  40         fsel    fp2,fp0,fp3,fp2
  41         blr
  42 END (__copysignl)
  43
  44 #if IS_IN (libm)
  45 long_double_symbol (libm, __copysignl, copysignl)
  46 #else
  47 long_double_symbol (libc, __copysignl, copysignl)
  48 #endif