/* ix87 specific implementation of arctanh function.   Copyright (C) 1996, 1999, 2005 Free Software Foundation, Inc.   This file is part of the GNU C Library.   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.   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>#ifdef __ELF__	.section .rodata#else	.text#endif	.align ALIGNARG(4)	ASM_TYPE_DIRECTIVE(half,@object)half:	.double 0.5	ASM_SIZE_DIRECTIVE(half)	ASM_TYPE_DIRECTIVE(one,@object)one:	.double 1.0	ASM_SIZE_DIRECTIVE(one)	ASM_TYPE_DIRECTIVE(limit,@object)limit:	.double 0.29	ASM_SIZE_DIRECTIVE(limit)	.align ALIGNARG(4)	ASM_TYPE_DIRECTIVE(ln2_2,@object)ln2_2:	.tfloat 0.3465735902799726547086160	ASM_SIZE_DIRECTIVE(ln2_2)#ifdef PIC#define MO(op) op##@GOTOFF(%edx)#else#define MO(op) op#endif	.textENTRY(__ieee754_atanhf)	movl	4(%esp), %ecx	movl	%ecx, %eax	andl	$0x7fffffff, %eax	cmpl	$0x7f800000, %eax	ja	5f#ifdef PIC	LOAD_PIC_REG (dx)#endif	andl	$0x80000000, %ecx // ECX == 0 iff X >= 0	fldt	MO(ln2_2)	// 0.5*ln2	xorl	%ecx, 4(%esp)	flds	4(%esp)		// |x| : 0.5*ln2	fcoml	MO(half)	// |x| : 0.5*ln2	fld	%st(0)		// |x| : |x| : 0.5*ln2	fnstsw			// |x| : |x| : 0.5*ln2	sahf	jae	2f	fadd	%st, %st(1)	// |x| : 2*|x| : 0.5*ln2	fld	%st		// |x| : |x| : 2*|x| : 0.5*ln2	fsubrl	MO(one)		// 1-|x| : |x| : 2*|x| : 0.5*ln2	fxch			// |x| : 1-|x| : 2*|x| : 0.5*ln2	fmul	%st(2)		// 2*|x|^2 : 1-|x| : 2*|x| : 0.5*ln2	fdivp			// (2*|x|^2)/(1-|x|) : 2*|x| : 0.5*ln2	faddp			// 2*|x|+(2*|x|^2)/(1-|x|) : 0.5*ln2	fcoml	MO(limit)	// 2*|x|+(2*|x|^2)/(1-|x|) : 0.5*ln2	fnstsw			// 2*|x|+(2*|x|^2)/(1-|x|) : 0.5*ln2	sahf	jae	4f	fyl2xp1			// 0.5*ln2*ld(1+2*|x|+(2*|x|^2)/(1-|x|))	jecxz	3f	fchs			// 0.5*ln2*ld(1+2*x+(2*x^2)/(1-x))3:	ret	.align ALIGNARG(4)4:	faddl	MO(one)		// 1+2*|x|+(2*|x|^2)/(1-|x|) : 0.5*ln2	fyl2x			// 0.5*ln2*ld(1+2*|x|+(2*|x|^2)/(1-|x|))	jecxz	3f	fchs			// 0.5*ln2*ld(1+2*x+(2*x^2)/(1-x))3:	ret	.align ALIGNARG(4)2:	faddl	MO(one)		// 1+|x| : |x| : 0.5*ln2	fxch			// |x| : 1+|x| : 0.5*ln2	fsubrl	MO(one)		// 1-|x| : 1+|x| : 0.5*ln2	fdivrp			// (1+|x|)/(1-|x|) : 0.5*ln2	fyl2x			// 0.5*ln2*ld((1+|x|)/(1-|x|))	jecxz	3f	fchs			// 0.5*ln2*ld((1+x)/(1-x))3:	ret	// x == NaN5:	flds	4(%esp)	retEND(__ieee754_atanhf)