1 /* 2 * Copyright (c) 2015, Linaro Limited 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 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 union dword { 29 unsigned long long dw; 30 unsigned long w[2]; 31 }; 32 33 long long __aeabi_llsl(long long a, int shift); 34 long long __aeabi_llsl(long long a, int shift) 35 { 36 union dword dword = { .dw = a }; 37 unsigned long hi = dword.w[1]; 38 unsigned long lo = dword.w[0]; 39 40 if (shift >= 32) { 41 hi = lo << (shift - 32); 42 lo = 0; 43 } else if (shift > 0) { 44 hi = (hi << shift) | (lo >> (32 - shift)); 45 lo = lo << shift; 46 } 47 48 dword.w[1] = hi; 49 dword.w[0] = lo; 50 return dword.dw; 51 } 52 53 long long __aeabi_llsr(long long a, int shift); 54 long long __aeabi_llsr(long long a, int shift) 55 { 56 union dword dword = { .dw = a }; 57 unsigned long hi = dword.w[1]; 58 unsigned long lo = dword.w[0]; 59 60 if (shift >= 32) { 61 lo = hi >> (shift - 32); 62 hi = 0; 63 } else if (shift > 0) { 64 lo = (lo >> shift) | (hi << (32 - shift)); 65 hi = hi >> shift; 66 } 67 68 dword.w[1] = hi; 69 dword.w[0] = lo; 70 return dword.dw; 71 } 72