1/* Copyright (c) 2005  Anatoly Sokolov  <aesok@post.ru>
2   Copyright (c) 2006  Dmitry Xmelkov
3   All rights reserved.
4
5   Redistribution and use in source and binary forms, with or without
6   modification, are permitted provided that the following conditions are met:
7
8   * Redistributions of source code must retain the above copyright
9     notice, this list of conditions and the following disclaimer.
10   * Redistributions in binary form must reproduce the above copyright
11     notice, this list of conditions and the following disclaimer in
12     the documentation and/or other materials provided with the
13     distribution.
14   * Neither the name of the copyright holders nor the names of
15     contributors may be used to endorse or promote products derived
16     from this software without specific prior written permission.
17
18   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28   POSSIBILITY OF SUCH DAMAGE. */
29
30/* $Id: inverse.S 2473 2015-04-09 08:10:22Z pitchumani $ */
31
32#include "fp32def.h"
33#include "asmdef.h"
34
35/* float inverse (float A);
36     The inverse() function returns 1/A value.
37 */
38
39#define	FL_1	0x3f800000	/* +1.0	*/
40
41ENTRY inverse
42	X_movw	rB0, rA0
43	X_movw	rB2, rA2	; B = A
44
45	ldi	rA0,  lo8(FL_1)
46	ldi	rA1,  hi8(FL_1)
47	ldi	rA2, hlo8(FL_1)
48	ldi	rA3, hhi8(FL_1)
49
50	XJMP	_U(__divsf3)
51ENDFUNC
52