1 /* ix87 specific frexp implementation for long double.
2 Copyright (C) 1997, 2000 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 Library General Public License as
8 published by the Free Software Foundation; either version 2 of the
9 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 Library General Public License for more details.
16 You should have received a copy of the GNU Library General Public
17 License along with the GNU C Library; see the file COPYING.LIB. If not,
18 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 #include <machine/asm.h>
32 ASM_TYPE_DIRECTIVE(two64,@object)
33 two64: .byte 0, 0, 0, 0, 0, 0, 0xf0, 0x43
34 ASM_SIZE_DIRECTIVE(two64)
35 /* The following is LDBL_MAX / ldexp (1.0, 64), the largest
36 number we can handle the normal way. */
37 ASM_TYPE_DIRECTIVE(largest,@object)
39 .byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbe, 0x7f, 0, 0
40 ASM_SIZE_DIRECTIVE(largest)
43 #define MO(op) op##@GOTOFF(%edx)
48 #define PARMS LINKAGE /* no space for saved regs */
55 ENTRY (BP_SYM (__frexpl))
79 addl $_GLOBAL_OFFSET_TABLE_+[.-3b], %edx
82 fmull MO(two64) /* It's not necessary to use a 80bit factor */
96 /* Store %ecx in the variable pointed to by the second argument,
97 get the factor from the stack and return. */
98 1: movl EXPP(%esp), %eax
99 CHECK_BOUNDS_BOTH_WIDE (%eax, EXPP(%esp), $4)
106 4: movl VAL2(%esp), %ecx
113 movl %edx, VAL2(%esp)
115 END (BP_SYM (__frexpl))
116 weak_alias (BP_SYM (__frexpl), BP_SYM (frexpl))