sysdeps/i386/fpu/s_truncl.S

   1 /* Truncate long double value.
   2    Copyright (C) 1997-2020 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
   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 <libm-alias-ldouble.h>
  21 #include <machine/asm.h>
  22
  23 ENTRY(__truncl)
  24         fldt    4(%esp)
  25         subl    $32, %esp
  26         cfi_adjust_cfa_offset (32)
  27         fnstenv 4(%esp)
  28         movl    $0xc00, %edx
  29         orl     4(%esp), %edx
  30         movl    %edx, (%esp)
  31         fldcw   (%esp)
  32         frndint
  33         fnstsw
  34         andl    $0x1, %eax
  35         orl     %eax, 8(%esp)
  36         fldenv  4(%esp)
  37         addl    $32, %esp
  38         cfi_adjust_cfa_offset (-32)
  39         ret
  40 END(__truncl)
  41 libm_alias_ldouble (__trunc, trunc)