1 /* 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "libadt/port.hpp" 27 28 // Code for portable compiling 29 30 #ifdef __GNUC__ 31 #pragma implementation 32 #endif 33 34 // %%%%% includes not needed with AVM framework - Ungar 35 // #include "port.hpp" 36 37 // This is only used if turboc is used and it causes problems with 38 // gcc. 39 #ifdef __TURBOC__ 40 #include <iostream.h> 41 #endif 42 43 #include <stdio.h> 44 45 //------------------------------gcd-------------------------------------------- 46 // Greatest common divisor 47 uint32 gcd( register uint32 x, register uint32 y ) 48 { 49 register uint32 tmp; 50 while( x ) { // While not zero 51 tmp = x; // Hold onto smaller x value 52 x = y % x; // Compute modulus; since y>=x, 0 <= mod < x 53 y = tmp; // y = old x 54 } 55 return y; 56 } 57 58 //----------------------------------------------------------------------------- 59 // Find first 1, or return 32 if empty 60 int ff1( uint32 mask ) 61 { 62 unsigned i, n = 0; 63 64 for( i=1, n=0; i; i<<=1, n++) 65 if( mask&i ) return n; 66 return 32; 67 } 68 69 //----------------------------------------------------------------------------- 70 // Find highest 1, or return 32 if empty 71 int fh1( uint32 mask ) 72 { 73 unsigned i, n = 0; 74 75 for( i=((uint32)1<<31), n=31; i; i>>=1, n--) 76 if( mask&i ) return n; 77 return 32; 78 } 79 80 //------------------------------rotate32--------------------------------------- 81 // Rotate 32bits. Postive rotates left (bits move toward high-order bit), 82 // negative rotates right. 83 uint32 rotate32( register uint32 x, register int32 cnt ) 84 { 85 if( cnt >= 0 ) { // Positive rotates left 86 cnt &= 31; // Mask off extra shift bits 87 } else { // Negative rotates right 88 cnt = (-cnt)&31; // Flip sign; mask extra shift bits 89 cnt = 32-cnt; // Rotate right by big left rotation 90 } 91 return (x << cnt) | (x >> (32-cnt)); 92 } 93 94 /* Disabled - we have another log2 in the system. 95 This function doesn't work if used as substitute 96 for the existing log2. Keep around until we have 97 verified all uses of log2 do the correct thing! 98 //------------------------------log2------------------------------------------- 99 // Log base 2. Might also be called 'count leading zeros'. Log2(x) returns 100 // an l such that (1L<<l) <= x < (2L<<l). log2(x) returns 32. 101 uint log2( uint32 x ) 102 { 103 register uint l = 32; // Log bits 104 register int32 sx = x; // Treat as signed number 105 while( sx >= 0 ) // While high bit is clear 106 sx <<= 1, l--; // Shift bits left, count down log2 107 return l; 108 } 109 */ 110 111 //------------------------------print------------------------------------------ 112 // Print a pointer without modifying the contents 113 #ifdef __TURBOC__ 114 ostream &ostream::operator << (const void *ptr) 115 { 116 return (*this) << "0x" << hex << (uint)ptr << dec; 117 } 118 #else 119 /*ostream &operator << (ostream &os, const void *ptr) 120 { 121 return os << "0x" << hex << (uint)ptr << dec; 122 }*/ 123 #endif