Current File : //glibc-2.29/sysdeps/i386/fpu/s_trunc.S
/* Truncate double value.
Copyright (C) 1997-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <machine/asm.h>
#include <libm-alias-double.h>
ENTRY(__trunc)
fldl 4(%esp)
subl $32, %esp
cfi_adjust_cfa_offset (32)
fnstenv 4(%esp)
movl $0xc00, %edx
orl 4(%esp), %edx
movl %edx, (%esp)
fldcw (%esp)
frndint
fldenv 4(%esp)
addl $32, %esp
cfi_adjust_cfa_offset (-32)
ret
END(__trunc)
libm_alias_double (__trunc, trunc)
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