1 /*- 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <libkern/quad.h> 38 39 /* 40 * Shift a (signed) quad value left (arithmetic shift left). 41 * This is the same as logical shift left! 42 */ 43 quad_t 44 __ashldi3(a, shift) 45 quad_t a; 46 qshift_t shift; 47 { 48 union uu aa; 49 50 aa.q = a; 51 if (shift >= LONG_BITS) { 52 aa.ul[H] = shift >= QUAD_BITS ? 0 : 53 aa.ul[L] << (shift - LONG_BITS); 54 aa.ul[L] = 0; 55 } else if (shift > 0) { 56 aa.ul[H] = (aa.ul[H] << shift) | 57 (aa.ul[L] >> (LONG_BITS - shift)); 58 aa.ul[L] <<= shift; 59 } 60 return (aa.q); 61 } 62 63 #ifdef __ARM_EABI__ 64 long long __aeabi_llsl(long long, int); 65 66 long long 67 __aeabi_llsl(long long a, int b) 68 { 69 return __ashldi3(a, b); 70 } 71 #endif 72