sysdeps/powerpc/powerpc32/fpu/s_fabsl.S

   1 /* Copy a sign bit between floating-point values.
   2    IBM extended format long double version.
   3    Copyright (C) 2004-2018 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    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <sysdep.h>
  21 #include <math_ldbl_opt.h>
  22
  23 ENTRY(__fabsl)
  24 /* long double [f1,f2] fabs (long double [f1,f2] x);
  25    fabs(x,y) returns a value with the magnitude of x and
  26    with the sign bit of y.  */
  27 #ifdef _ARCH_PPCGR
  28         /* fsel available.  */
  29         fmr     fp0,fp1
  30 #else
  31         /* Use integer operations to test sign of high part to avoid
  32            exceptions on sNaNs.  */
  33         stwu    r1,-16(r1)
  34         cfi_adjust_cfa_offset (16)
  35         stfd    fp1,8(r1)
  36 #endif
  37         fabs    fp1,fp1
  38 #ifdef _ARCH_PPCGR
  39         fneg    fp3,fp2
  40         fsel    fp2,fp0,fp2,fp3
  41 #else
  42         lwz     r3,8+HIWORD(r1)
  43         cmpwi   cr6,r3,0
  44         addi    r1,r1,16
  45         cfi_adjust_cfa_offset (-16)
  46         bgelr   cr6
  47         fneg    fp2,fp2
  48 #endif
  49         blr
  50 END (__fabsl)
  51
  52 long_double_symbol (libm, __fabsl, fabsl)