/* ix87 specific frexp implementation for double.   Copyright (C) 1997, 2000, 2005 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, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  */#include <machine/asm.h>#include "bp-sym.h"#include "bp-asm.h"#ifdef __ELF__	.section .rodata#else	.text#endif	.align ALIGNARG(4)	ASM_TYPE_DIRECTIVE(two54,@object)two54:	.byte 0, 0, 0, 0, 0, 0, 0x50, 0x43	ASM_SIZE_DIRECTIVE(two54)#ifdef PIC#define MO(op) op##@GOTOFF(%edx)#else#define MO(op) op#endif#define PARMS	LINKAGE		/* no space for saved regs */#define VAL0	PARMS#define VAL1	VAL0+4#define EXPP	VAL1+4	.textENTRY (BP_SYM (__frexp))	ENTER	movl	VAL0(%esp), %ecx	movl	VAL1(%esp), %eax	movl	%eax, %edx	andl	$0x7fffffff, %eax	orl	%eax, %ecx	jz	1f	xorl	%ecx, %ecx	cmpl	$0x7ff00000, %eax	jae	1f	cmpl	$0x00100000, %eax	jae	2f	fldl	VAL0(%esp)#ifdef	PIC	LOAD_PIC_REG (dx)#endif	fmull	MO(two54)	movl	$-54, %ecx	fstpl	VAL0(%esp)	fwait	movl	VAL1(%esp), %eax	movl	%eax, %edx	andl	$0x7fffffff, %eax2:	shrl	$20, %eax	andl	$0x800fffff, %edx	subl	$1022, %eax	orl	$0x3fe00000, %edx	addl	%eax, %ecx	movl	%edx, VAL1(%esp)	/* Store %ecx in the variable pointed to by the second argument,	   get the factor from the stack and return.  */1:	movl	EXPP(%esp), %eax	CHECK_BOUNDS_BOTH_WIDE (%eax, EXPP(%esp), $4)	fldl	VAL0(%esp)	movl	%ecx, (%eax)	LEAVE	retEND (BP_SYM (__frexp))weak_alias (BP_SYM (__frexp), BP_SYM (frexp))