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1 /*
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2 * Copyright 1997-1998 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // Code for portable compiling
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26
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27 #ifdef __GNUC__
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28 #pragma implementation
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29 #endif
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30
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31 #include "incls/_precompiled.incl"
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32 #include "incls/_port.cpp.incl"
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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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