clz.S revision 1.1
1/* $NetBSD: clz.S,v 1.1 2014/09/03 19:34:25 matt Exp $ */ 2 3/*- 4 * Copyright (C) 2001 Martin J. Laubach <mjl@NetBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29/*----------------------------------------------------------------------*/ 30 31#include <machine/asm.h> 32 33__RCSID("$NetBSD: clz.S,v 1.1 2014/09/03 19:34:25 matt Exp $") 34 35ENTRY_NP(__clzsi2) 36#ifdef _LP64 37 l.slli r3, r3, 32 38 l.addi r5, r0, 64 39#else 40 l.addi r5, r0, 32 41#endif 42 l.fl1 r11, r3 43 l.sub r11, r5, r11 44 l.jr lr 45 l.nop 46END(__clzsi2) 47 48ENTRY_NP(__clzdi2) 49#ifdef _LP64 50 l.addi r5, r0, 64 51#else 52 l.sfeqi r3, 0 53 l.bf 1f 54 l.nop 55 l.addi r5, r0, 32 56#endif 57 l.fl1 r11, r3 58 l.sub r11, r5, r11 59 l.jr lr 60 l.nop 61#ifndef _LP64 621: l.addi r5, r0, 64 63 l.fl1 r11, r4 64 l.sub r11, r5, r11 65 l.jr lr 66 l.nop 67#endif 68END(__clzdi2) 69