sysdeps/powerpc/powerpc32/power6/fpu/s_isnanf.S

   1 /* isnanf().  PowerPC32 version.
   2    Copyright (C) 2008-2019 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sysdep.h>
  20 #include <math_ldbl_opt.h>
  21
  22 /* int __isnanf(x)  */
  23         .machine power6
  24 EALIGN (__isnanf, 4, 0)
  25         stwu    r1,-32(r1)
  26         cfi_adjust_cfa_offset (32)
  27         ori     r1,r1,0
  28         stfs    fp1,24(r1)      /* copy FPR to GPR */
  29         ori     r1,r1,0
  30         lwz     r4,24(r1)
  31         lis     r0,0x7f80       /* const long r0 0x7f800000 */
  32         clrlwi  r4,r4,1         /* x = fabs(x) */
  33         cmpw    cr7,r4,r0       /* if (fabs(x) =< inf) */
  34         li      r3,0            /* then return 0 */
  35         addi    r1,r1,32
  36         cfi_adjust_cfa_offset (-32)
  37         blelr+  cr7
  38 L(NaN):
  39         li      r3,1            /* else return 1 */
  40         blr
  41         END (__isnanf)
  42
  43 hidden_def (__isnanf)
  44 weak_alias (__isnanf, isnanf)