1 /* ix87 specific frexp implementation for double.
2 Copyright (C) 1997-2013 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>
28 two54: .byte 0, 0, 0, 0, 0, 0, 0x50, 0x43
29 ASM_SIZE_DIRECTIVE(two54)
32 #define MO(op) op##@GOTOFF(%edx)
37 #define PARMS LINKAGE /* no space for saved regs */
43 ENTRY (BP_SYM (__frexp))
49 andl $0x7fffffff, %eax
53 cmpl $0x7ff00000, %eax
56 cmpl $0x00100000, %eax
69 andl $0x7fffffff, %eax
72 andl $0x800fffff, %edx
78 /* Store %ecx in the variable pointed to by the second argument,
79 get the factor from the stack and return. */
80 1: movl EXPP(%esp), %eax
81 CHECK_BOUNDS_BOTH_WIDE (%eax, EXPP(%esp), $4)
87 END (BP_SYM (__frexp))
88 weak_alias (BP_SYM (__frexp), BP_SYM (frexp))