| 1 | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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| 2 | /* ***** BEGIN LICENSE BLOCK *****
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| 3 | * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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| 4 | *
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| 5 | * The contents of this file are subject to the Mozilla Public License Version
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| 6 | * 1.1 (the "License"); you may not use this file except in compliance with
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| 7 | * the License. You may obtain a copy of the License at
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| 8 | * http://www.mozilla.org/MPL/
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| 9 | *
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| 10 | * Software distributed under the License is distributed on an "AS IS" basis,
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| 11 | * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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| 12 | * for the specific language governing rights and limitations under the
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| 13 | * License.
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| 14 | *
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| 15 | * The Original Code is the Netscape Portable Runtime (NSPR).
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| 16 | *
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| 17 | * The Initial Developer of the Original Code is
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| 18 | * Netscape Communications Corporation.
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| 19 | * Portions created by the Initial Developer are Copyright (C) 1998-2000
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| 20 | * the Initial Developer. All Rights Reserved.
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| 21 | *
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| 22 | * Contributor(s):
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| 23 | *
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| 24 | * Alternatively, the contents of this file may be used under the terms of
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| 25 | * either the GNU General Public License Version 2 or later (the "GPL"), or
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| 26 | * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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| 27 | * in which case the provisions of the GPL or the LGPL are applicable instead
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| 28 | * of those above. If you wish to allow use of your version of this file only
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| 29 | * under the terms of either the GPL or the LGPL, and not to allow others to
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| 30 | * use your version of this file under the terms of the MPL, indicate your
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| 31 | * decision by deleting the provisions above and replace them with the notice
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| 32 | * and other provisions required by the GPL or the LGPL. If you do not delete
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| 33 | * the provisions above, a recipient may use your version of this file under
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| 34 | * the terms of any one of the MPL, the GPL or the LGPL.
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| 35 | *
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| 36 | * ***** END LICENSE BLOCK ***** */
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| 37 |
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| 38 | /*
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| 39 | ** File: prlong.h
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| 40 | ** Description: Portable access to 64 bit numerics
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| 41 | **
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| 42 | ** Long-long (64-bit signed integer type) support. Some C compilers
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| 43 | ** don't support 64 bit integers yet, so we use these macros to
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| 44 | ** support both machines that do and don't.
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| 45 | **/
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| 46 | #ifndef prlong_h___
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| 47 | #define prlong_h___
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| 48 |
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| 49 | #include "prtypes.h"
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| 50 |
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| 51 | PR_BEGIN_EXTERN_C
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| 52 |
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| 53 | /***********************************************************************
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| 54 | ** DEFINES: LL_MaxInt
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| 55 | ** LL_MinInt
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| 56 | ** LL_Zero
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| 57 | ** LL_MaxUint
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| 58 | ** DESCRIPTION:
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| 59 | ** Various interesting constants and static variable
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| 60 | ** initializer
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| 61 | ***********************************************************************/
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| 62 | #if defined(HAVE_WATCOM_BUG_2)
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| 63 | PRInt64 __pascal __loadds __export
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| 64 | LL_MaxInt(void);
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| 65 | PRInt64 __pascal __loadds __export
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| 66 | LL_MinInt(void);
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| 67 | PRInt64 __pascal __loadds __export
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| 68 | LL_Zero(void);
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| 69 | PRUint64 __pascal __loadds __export
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| 70 | LL_MaxUint(void);
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| 71 | #else
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| 72 | NSPR_API(PRInt64) LL_MaxInt(void);
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| 73 | NSPR_API(PRInt64) LL_MinInt(void);
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| 74 | NSPR_API(PRInt64) LL_Zero(void);
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| 75 | NSPR_API(PRUint64) LL_MaxUint(void);
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| 76 | #endif
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| 77 |
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| 78 | #define LL_MAXINT LL_MaxInt()
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| 79 | #define LL_MININT LL_MinInt()
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| 80 | #define LL_ZERO LL_Zero()
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| 81 | #define LL_MAXUINT LL_MaxUint()
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| 82 |
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| 83 | #if defined(HAVE_LONG_LONG)
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| 84 |
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| 85 | #if PR_BYTES_PER_LONG == 8
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| 86 | #define LL_INIT(hi, lo) ((hi ## L << 32) + lo ## L)
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| 87 | #elif (defined(WIN32) || defined(WIN16)) && !defined(__GNUC__)
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| 88 | #define LL_INIT(hi, lo) ((hi ## i64 << 32) + lo ## i64)
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| 89 | #else
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| 90 | #define LL_INIT(hi, lo) ((hi ## LL << 32) + lo ## LL)
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| 91 | #endif
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| 92 |
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| 93 | /***********************************************************************
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| 94 | ** MACROS: LL_*
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| 95 | ** DESCRIPTION:
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| 96 | ** The following macros define portable access to the 64 bit
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| 97 | ** math facilities.
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| 98 | **
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| 99 | ***********************************************************************/
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| 100 |
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| 101 | /***********************************************************************
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| 102 | ** MACROS: LL_<relational operators>
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| 103 | **
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| 104 | ** LL_IS_ZERO Test for zero
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| 105 | ** LL_EQ Test for equality
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| 106 | ** LL_NE Test for inequality
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| 107 | ** LL_GE_ZERO Test for zero or positive
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| 108 | ** LL_CMP Compare two values
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| 109 | ***********************************************************************/
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| 110 | #define LL_IS_ZERO(a) ((a) == 0)
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| 111 | #define LL_EQ(a, b) ((a) == (b))
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| 112 | #define LL_NE(a, b) ((a) != (b))
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| 113 | #define LL_GE_ZERO(a) ((a) >= 0)
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| 114 | #define LL_CMP(a, op, b) ((PRInt64)(a) op (PRInt64)(b))
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| 115 | #define LL_UCMP(a, op, b) ((PRUint64)(a) op (PRUint64)(b))
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| 116 |
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| 117 | /***********************************************************************
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| 118 | ** MACROS: LL_<logical operators>
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| 119 | **
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| 120 | ** LL_AND Logical and
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| 121 | ** LL_OR Logical or
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| 122 | ** LL_XOR Logical exclusion
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| 123 | ** LL_OR2 A disgusting deviation
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| 124 | ** LL_NOT Negation (one's complement)
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| 125 | ***********************************************************************/
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| 126 | #define LL_AND(r, a, b) ((r) = (a) & (b))
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| 127 | #define LL_OR(r, a, b) ((r) = (a) | (b))
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| 128 | #define LL_XOR(r, a, b) ((r) = (a) ^ (b))
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| 129 | #define LL_OR2(r, a) ((r) = (r) | (a))
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| 130 | #define LL_NOT(r, a) ((r) = ~(a))
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| 131 |
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| 132 | /***********************************************************************
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| 133 | ** MACROS: LL_<mathematical operators>
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| 134 | **
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| 135 | ** LL_NEG Negation (two's complement)
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| 136 | ** LL_ADD Summation (two's complement)
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| 137 | ** LL_SUB Difference (two's complement)
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| 138 | ***********************************************************************/
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| 139 | #define LL_NEG(r, a) ((r) = -(a))
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| 140 | #define LL_ADD(r, a, b) ((r) = (a) + (b))
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| 141 | #define LL_SUB(r, a, b) ((r) = (a) - (b))
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| 142 |
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| 143 | /***********************************************************************
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| 144 | ** MACROS: LL_<mathematical operators>
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| 145 | **
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| 146 | ** LL_MUL Product (two's complement)
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| 147 | ** LL_DIV Quotient (two's complement)
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| 148 | ** LL_MOD Modulus (two's complement)
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| 149 | ***********************************************************************/
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| 150 | #define LL_MUL(r, a, b) ((r) = (a) * (b))
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| 151 | #define LL_DIV(r, a, b) ((r) = (a) / (b))
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| 152 | #define LL_MOD(r, a, b) ((r) = (a) % (b))
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| 153 |
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| 154 | /***********************************************************************
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| 155 | ** MACROS: LL_<shifting operators>
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| 156 | **
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| 157 | ** LL_SHL Shift left [0..64] bits
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| 158 | ** LL_SHR Shift right [0..64] bits with sign extension
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| 159 | ** LL_USHR Unsigned shift right [0..64] bits
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| 160 | ** LL_ISHL Signed shift left [0..64] bits
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| 161 | ***********************************************************************/
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| 162 | #define LL_SHL(r, a, b) ((r) = (PRInt64)(a) << (b))
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| 163 | #define LL_SHR(r, a, b) ((r) = (PRInt64)(a) >> (b))
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| 164 | #define LL_USHR(r, a, b) ((r) = (PRUint64)(a) >> (b))
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| 165 | #define LL_ISHL(r, a, b) ((r) = (PRInt64)(a) << (b))
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| 166 |
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| 167 | /***********************************************************************
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| 168 | ** MACROS: LL_<conversion operators>
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| 169 | **
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| 170 | ** LL_L2I Convert to signed 32 bit
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| 171 | ** LL_L2UI Convert to unsigned 32 bit
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| 172 | ** LL_L2F Convert to floating point
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| 173 | ** LL_L2D Convert to floating point
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| 174 | ** LL_I2L Convert signed to 64 bit
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| 175 | ** LL_UI2L Convert unsigned to 64 bit
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| 176 | ** LL_F2L Convert float to 64 bit
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| 177 | ** LL_D2L Convert float to 64 bit
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| 178 | ***********************************************************************/
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| 179 | #define LL_L2I(i, l) ((i) = (PRInt32)(l))
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| 180 | #define LL_L2UI(ui, l) ((ui) = (PRUint32)(l))
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| 181 | #define LL_L2F(f, l) ((f) = (PRFloat64)(l))
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| 182 | #define LL_L2D(d, l) ((d) = (PRFloat64)(l))
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| 183 |
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| 184 | #define LL_I2L(l, i) ((l) = (PRInt64)(i))
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| 185 | #define LL_UI2L(l, ui) ((l) = (PRInt64)(ui))
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| 186 | #define LL_F2L(l, f) ((l) = (PRInt64)(f))
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| 187 | #define LL_D2L(l, d) ((l) = (PRInt64)(d))
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| 188 |
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| 189 | /***********************************************************************
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| 190 | ** MACROS: LL_UDIVMOD
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| 191 | ** DESCRIPTION:
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| 192 | ** Produce both a quotient and a remainder given an unsigned
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| 193 | ** INPUTS: PRUint64 a: The dividend of the operation
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| 194 | ** PRUint64 b: The quotient of the operation
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| 195 | ** OUTPUTS: PRUint64 *qp: pointer to quotient
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| 196 | ** PRUint64 *rp: pointer to remainder
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| 197 | ***********************************************************************/
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| 198 | #define LL_UDIVMOD(qp, rp, a, b) \
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| 199 | (*(qp) = ((PRUint64)(a) / (b)), \
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| 200 | *(rp) = ((PRUint64)(a) % (b)))
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| 201 |
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| 202 | #else /* !HAVE_LONG_LONG */
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| 203 |
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| 204 | #ifdef IS_LITTLE_ENDIAN
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| 205 | #define LL_INIT(hi, lo) {PR_UINT32(lo), PR_UINT32(hi)}
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| 206 | #else
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| 207 | #define LL_INIT(hi, lo) {PR_UINT32(hi), PR_UINT32(lo)}
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| 208 | #endif
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| 209 |
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| 210 | #define LL_IS_ZERO(a) (((a).hi == 0) && ((a).lo == 0))
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| 211 | #define LL_EQ(a, b) (((a).hi == (b).hi) && ((a).lo == (b).lo))
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| 212 | #define LL_NE(a, b) (((a).hi != (b).hi) || ((a).lo != (b).lo))
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| 213 | #define LL_GE_ZERO(a) (((a).hi >> 31) == 0)
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| 214 |
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| 215 | #define LL_CMP(a, op, b) (((a).hi == (b).hi) ? ((a).lo op (b).lo) : \
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| 216 | ((PRInt32)(a).hi op (PRInt32)(b).hi))
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| 217 | #define LL_UCMP(a, op, b) (((a).hi == (b).hi) ? ((a).lo op (b).lo) : \
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| 218 | ((a).hi op (b).hi))
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| 219 |
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| 220 | #define LL_AND(r, a, b) ((r).lo = (a).lo & (b).lo, \
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| 221 | (r).hi = (a).hi & (b).hi)
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| 222 | #define LL_OR(r, a, b) ((r).lo = (a).lo | (b).lo, \
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| 223 | (r).hi = (a).hi | (b).hi)
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| 224 | #define LL_XOR(r, a, b) ((r).lo = (a).lo ^ (b).lo, \
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| 225 | (r).hi = (a).hi ^ (b).hi)
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| 226 | #define LL_OR2(r, a) ((r).lo = (r).lo | (a).lo, \
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| 227 | (r).hi = (r).hi | (a).hi)
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| 228 | #define LL_NOT(r, a) ((r).lo = ~(a).lo, \
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| 229 | (r).hi = ~(a).hi)
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| 230 |
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| 231 | #define LL_NEG(r, a) ((r).lo = -(PRInt32)(a).lo, \
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| 232 | (r).hi = -(PRInt32)(a).hi - ((r).lo != 0))
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| 233 | #define LL_ADD(r, a, b) { \
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| 234 | PRInt64 _a, _b; \
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| 235 | _a = a; _b = b; \
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| 236 | (r).lo = _a.lo + _b.lo; \
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| 237 | (r).hi = _a.hi + _b.hi + ((r).lo < _b.lo); \
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| 238 | }
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| 239 |
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| 240 | #define LL_SUB(r, a, b) { \
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| 241 | PRInt64 _a, _b; \
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| 242 | _a = a; _b = b; \
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| 243 | (r).lo = _a.lo - _b.lo; \
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| 244 | (r).hi = _a.hi - _b.hi - (_a.lo < _b.lo); \
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| 245 | }
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| 246 |
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| 247 | #define LL_MUL(r, a, b) { \
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| 248 | PRInt64 _a, _b; \
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| 249 | _a = a; _b = b; \
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| 250 | LL_MUL32(r, _a.lo, _b.lo); \
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| 251 | (r).hi += _a.hi * _b.lo + _a.lo * _b.hi; \
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| 252 | }
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| 253 |
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| 254 | #define _lo16(a) ((a) & PR_BITMASK(16))
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| 255 | #define _hi16(a) ((a) >> 16)
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| 256 |
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| 257 | #define LL_MUL32(r, a, b) { \
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| 258 | PRUint32 _a1, _a0, _b1, _b0, _y0, _y1, _y2, _y3; \
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| 259 | _a1 = _hi16(a), _a0 = _lo16(a); \
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| 260 | _b1 = _hi16(b), _b0 = _lo16(b); \
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| 261 | _y0 = _a0 * _b0; \
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| 262 | _y1 = _a0 * _b1; \
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| 263 | _y2 = _a1 * _b0; \
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| 264 | _y3 = _a1 * _b1; \
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| 265 | _y1 += _hi16(_y0); /* can't carry */ \
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| 266 | _y1 += _y2; /* might carry */ \
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| 267 | if (_y1 < _y2) \
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| 268 | _y3 += (PRUint32)(PR_BIT(16)); /* propagate */ \
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| 269 | (r).lo = (_lo16(_y1) << 16) + _lo16(_y0); \
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| 270 | (r).hi = _y3 + _hi16(_y1); \
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| 271 | }
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| 272 |
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| 273 | #define LL_UDIVMOD(qp, rp, a, b) ll_udivmod(qp, rp, a, b)
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| 274 |
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| 275 | NSPR_API(void) ll_udivmod(PRUint64 *qp, PRUint64 *rp, PRUint64 a, PRUint64 b);
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| 276 |
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| 277 | #define LL_DIV(r, a, b) { \
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| 278 | PRInt64 _a, _b; \
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| 279 | PRUint32 _negative = (PRInt32)(a).hi < 0; \
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| 280 | if (_negative) { \
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| 281 | LL_NEG(_a, a); \
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| 282 | } else { \
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| 283 | _a = a; \
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| 284 | } \
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| 285 | if ((PRInt32)(b).hi < 0) { \
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| 286 | _negative ^= 1; \
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| 287 | LL_NEG(_b, b); \
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| 288 | } else { \
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| 289 | _b = b; \
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| 290 | } \
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| 291 | LL_UDIVMOD(&(r), 0, _a, _b); \
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| 292 | if (_negative) \
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| 293 | LL_NEG(r, r); \
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| 294 | }
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| 295 |
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| 296 | #define LL_MOD(r, a, b) { \
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| 297 | PRInt64 _a, _b; \
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| 298 | PRUint32 _negative = (PRInt32)(a).hi < 0; \
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| 299 | if (_negative) { \
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| 300 | LL_NEG(_a, a); \
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| 301 | } else { \
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| 302 | _a = a; \
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| 303 | } \
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| 304 | if ((PRInt32)(b).hi < 0) { \
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| 305 | LL_NEG(_b, b); \
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| 306 | } else { \
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| 307 | _b = b; \
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| 308 | } \
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| 309 | LL_UDIVMOD(0, &(r), _a, _b); \
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| 310 | if (_negative) \
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| 311 | LL_NEG(r, r); \
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| 312 | }
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| 313 |
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| 314 | #define LL_SHL(r, a, b) { \
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| 315 | if (b) { \
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| 316 | PRInt64 _a; \
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| 317 | _a = a; \
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| 318 | if ((b) < 32) { \
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| 319 | (r).lo = _a.lo << ((b) & 31); \
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| 320 | (r).hi = (_a.hi << ((b) & 31)) | (_a.lo >> (32 - (b))); \
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| 321 | } else { \
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| 322 | (r).lo = 0; \
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| 323 | (r).hi = _a.lo << ((b) & 31); \
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| 324 | } \
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| 325 | } else { \
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| 326 | (r) = (a); \
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| 327 | } \
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| 328 | }
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| 329 |
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| 330 | /* a is an PRInt32, b is PRInt32, r is PRInt64 */
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| 331 | #define LL_ISHL(r, a, b) { \
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| 332 | if (b) { \
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| 333 | PRInt64 _a; \
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| 334 | _a.lo = (a); \
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| 335 | _a.hi = 0; \
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| 336 | if ((b) < 32) { \
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| 337 | (r).lo = (a) << ((b) & 31); \
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| 338 | (r).hi = ((a) >> (32 - (b))); \
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| 339 | } else { \
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| 340 | (r).lo = 0; \
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| 341 | (r).hi = (a) << ((b) & 31); \
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| 342 | } \
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| 343 | } else { \
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| 344 | (r).lo = (a); \
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| 345 | (r).hi = 0; \
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| 346 | } \
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| 347 | }
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| 348 |
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| 349 | #define LL_SHR(r, a, b) { \
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| 350 | if (b) { \
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| 351 | PRInt64 _a; \
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| 352 | _a = a; \
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| 353 | if ((b) < 32) { \
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| 354 | (r).lo = (_a.hi << (32 - (b))) | (_a.lo >> ((b) & 31)); \
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| 355 | (r).hi = (PRInt32)_a.hi >> ((b) & 31); \
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| 356 | } else { \
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| 357 | (r).lo = (PRInt32)_a.hi >> ((b) & 31); \
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| 358 | (r).hi = (PRInt32)_a.hi >> 31; \
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| 359 | } \
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| 360 | } else { \
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| 361 | (r) = (a); \
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| 362 | } \
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| 363 | }
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| 364 |
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| 365 | #define LL_USHR(r, a, b) { \
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| 366 | if (b) { \
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| 367 | PRInt64 _a; \
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| 368 | _a = a; \
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| 369 | if ((b) < 32) { \
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| 370 | (r).lo = (_a.hi << (32 - (b))) | (_a.lo >> ((b) & 31)); \
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| 371 | (r).hi = _a.hi >> ((b) & 31); \
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| 372 | } else { \
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| 373 | (r).lo = _a.hi >> ((b) & 31); \
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| 374 | (r).hi = 0; \
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| 375 | } \
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| 376 | } else { \
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| 377 | (r) = (a); \
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| 378 | } \
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| 379 | }
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| 380 |
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| 381 | #define LL_L2I(i, l) ((i) = (l).lo)
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| 382 | #define LL_L2UI(ui, l) ((ui) = (l).lo)
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| 383 | #define LL_L2F(f, l) { double _d; LL_L2D(_d, l); (f) = (PRFloat64)_d; }
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| 384 |
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| 385 | #define LL_L2D(d, l) { \
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| 386 | int _negative; \
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| 387 | PRInt64 _absval; \
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| 388 | \
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| 389 | _negative = (l).hi >> 31; \
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| 390 | if (_negative) { \
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| 391 | LL_NEG(_absval, l); \
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| 392 | } else { \
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| 393 | _absval = l; \
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| 394 | } \
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| 395 | (d) = (double)_absval.hi * 4.294967296e9 + _absval.lo; \
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| 396 | if (_negative) \
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| 397 | (d) = -(d); \
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| 398 | }
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| 399 |
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| 400 | #define LL_I2L(l, i) { PRInt32 _i = ((PRInt32)(i)) >> 31; (l).lo = (i); (l).hi = _i; }
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| 401 | #define LL_UI2L(l, ui) ((l).lo = (ui), (l).hi = 0)
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| 402 | #define LL_F2L(l, f) { double _d = (double)f; LL_D2L(l, _d); }
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| 403 |
|
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| 404 | #define LL_D2L(l, d) { \
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| 405 | int _negative; \
|
|---|
| 406 | double _absval, _d_hi; \
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| 407 | PRInt64 _lo_d; \
|
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| 408 | \
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| 409 | _negative = ((d) < 0); \
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| 410 | _absval = _negative ? -(d) : (d); \
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| 411 | \
|
|---|
| 412 | (l).hi = _absval / 4.294967296e9; \
|
|---|
| 413 | (l).lo = 0; \
|
|---|
| 414 | LL_L2D(_d_hi, l); \
|
|---|
| 415 | _absval -= _d_hi; \
|
|---|
| 416 | _lo_d.hi = 0; \
|
|---|
| 417 | if (_absval < 0) { \
|
|---|
| 418 | _lo_d.lo = -_absval; \
|
|---|
| 419 | LL_SUB(l, l, _lo_d); \
|
|---|
| 420 | } else { \
|
|---|
| 421 | _lo_d.lo = _absval; \
|
|---|
| 422 | LL_ADD(l, l, _lo_d); \
|
|---|
| 423 | } \
|
|---|
| 424 | \
|
|---|
| 425 | if (_negative) \
|
|---|
| 426 | LL_NEG(l, l); \
|
|---|
| 427 | }
|
|---|
| 428 |
|
|---|
| 429 | #endif /* !HAVE_LONG_LONG */
|
|---|
| 430 |
|
|---|
| 431 | PR_END_EXTERN_C
|
|---|
| 432 |
|
|---|
| 433 | #endif /* prlong_h___ */
|
|---|
