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