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