1 /* ix87 specific frexp implementation for double.
2 Copyright (C) 1997-2019 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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.
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.
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/>. */
20 #include <machine/asm.h>
21 #include <libm-alias-double.h>
27 two54: .byte 0, 0, 0, 0, 0, 0, 0x50, 0x43
28 ASM_SIZE_DIRECTIVE(two54)
31 #define MO(op) op##@GOTOFF(%edx)
36 #define PARMS 4 /* no space for saved regs */
47 andl $0x7fffffff, %eax
51 cmpl $0x7ff00000, %eax
54 cmpl $0x00100000, %eax
67 andl $0x7fffffff, %eax
70 andl $0x800fffff, %edx
76 /* Store %ecx in the variable pointed to by the second argument,
77 get the factor from the stack and return. */
78 1: movl EXPP(%esp), %eax
84 libm_alias_double (__frexp, frexp)