mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-14 07:27:34 +00:00
681fcfb1b7
constants rather than functions on platforms that have a 64-bit integer type. The patch is contributed by Christian Biesinger <cbiesinger@gmx.at>. r=wtc.
446 lines
14 KiB
C
446 lines
14 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is the Netscape Portable Runtime (NSPR).
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1998-2000
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
/*
|
|
** File: prlong.h
|
|
** Description: Portable access to 64 bit numerics
|
|
**
|
|
** Long-long (64-bit signed integer type) support. Some C compilers
|
|
** don't support 64 bit integers yet, so we use these macros to
|
|
** support both machines that do and don't.
|
|
**/
|
|
#ifndef prlong_h___
|
|
#define prlong_h___
|
|
|
|
#include "prtypes.h"
|
|
|
|
PR_BEGIN_EXTERN_C
|
|
|
|
/***********************************************************************
|
|
** DEFINES: LL_MaxInt
|
|
** LL_MinInt
|
|
** LL_Zero
|
|
** LL_MaxUint
|
|
** DESCRIPTION:
|
|
** Various interesting constants and static variable
|
|
** initializer
|
|
***********************************************************************/
|
|
#if defined(HAVE_WATCOM_BUG_2)
|
|
PRInt64 __pascal __loadds __export
|
|
LL_MaxInt(void);
|
|
PRInt64 __pascal __loadds __export
|
|
LL_MinInt(void);
|
|
PRInt64 __pascal __loadds __export
|
|
LL_Zero(void);
|
|
PRUint64 __pascal __loadds __export
|
|
LL_MaxUint(void);
|
|
#else
|
|
NSPR_API(PRInt64) LL_MaxInt(void);
|
|
NSPR_API(PRInt64) LL_MinInt(void);
|
|
NSPR_API(PRInt64) LL_Zero(void);
|
|
NSPR_API(PRUint64) LL_MaxUint(void);
|
|
#endif
|
|
|
|
#if defined(HAVE_LONG_LONG)
|
|
|
|
#if PR_BYTES_PER_LONG == 8
|
|
#define LL_MAXINT 9223372036854775807L
|
|
#define LL_MININT (-LL_MAXINT - 1L)
|
|
#define LL_ZERO 0L
|
|
#define LL_MAXUINT 18446744073709551615UL
|
|
#define LL_INIT(hi, lo) ((hi ## L << 32) + lo ## L)
|
|
#elif (defined(WIN32) || defined(WIN16)) && !defined(__GNUC__)
|
|
#define LL_MAXINT 9223372036854775807i64
|
|
#define LL_MININT (-LL_MAXINT - 1i64)
|
|
#define LL_ZERO 0i64
|
|
#define LL_MAXUINT 18446744073709551615ui64
|
|
#define LL_INIT(hi, lo) ((hi ## i64 << 32) + lo ## i64)
|
|
#else
|
|
#define LL_MAXINT 9223372036854775807LL
|
|
#define LL_MININT (-LL_MAXINT - 1LL)
|
|
#define LL_ZERO 0LL
|
|
#define LL_MAXUINT 18446744073709551615ULL
|
|
#define LL_INIT(hi, lo) ((hi ## LL << 32) + lo ## LL)
|
|
#endif
|
|
|
|
/***********************************************************************
|
|
** MACROS: LL_*
|
|
** DESCRIPTION:
|
|
** The following macros define portable access to the 64 bit
|
|
** math facilities.
|
|
**
|
|
***********************************************************************/
|
|
|
|
/***********************************************************************
|
|
** MACROS: LL_<relational operators>
|
|
**
|
|
** LL_IS_ZERO Test for zero
|
|
** LL_EQ Test for equality
|
|
** LL_NE Test for inequality
|
|
** LL_GE_ZERO Test for zero or positive
|
|
** LL_CMP Compare two values
|
|
***********************************************************************/
|
|
#define LL_IS_ZERO(a) ((a) == 0)
|
|
#define LL_EQ(a, b) ((a) == (b))
|
|
#define LL_NE(a, b) ((a) != (b))
|
|
#define LL_GE_ZERO(a) ((a) >= 0)
|
|
#define LL_CMP(a, op, b) ((PRInt64)(a) op (PRInt64)(b))
|
|
#define LL_UCMP(a, op, b) ((PRUint64)(a) op (PRUint64)(b))
|
|
|
|
/***********************************************************************
|
|
** MACROS: LL_<logical operators>
|
|
**
|
|
** LL_AND Logical and
|
|
** LL_OR Logical or
|
|
** LL_XOR Logical exclusion
|
|
** LL_OR2 A disgusting deviation
|
|
** LL_NOT Negation (one's complement)
|
|
***********************************************************************/
|
|
#define LL_AND(r, a, b) ((r) = (a) & (b))
|
|
#define LL_OR(r, a, b) ((r) = (a) | (b))
|
|
#define LL_XOR(r, a, b) ((r) = (a) ^ (b))
|
|
#define LL_OR2(r, a) ((r) = (r) | (a))
|
|
#define LL_NOT(r, a) ((r) = ~(a))
|
|
|
|
/***********************************************************************
|
|
** MACROS: LL_<mathematical operators>
|
|
**
|
|
** LL_NEG Negation (two's complement)
|
|
** LL_ADD Summation (two's complement)
|
|
** LL_SUB Difference (two's complement)
|
|
***********************************************************************/
|
|
#define LL_NEG(r, a) ((r) = -(a))
|
|
#define LL_ADD(r, a, b) ((r) = (a) + (b))
|
|
#define LL_SUB(r, a, b) ((r) = (a) - (b))
|
|
|
|
/***********************************************************************
|
|
** MACROS: LL_<mathematical operators>
|
|
**
|
|
** LL_MUL Product (two's complement)
|
|
** LL_DIV Quotient (two's complement)
|
|
** LL_MOD Modulus (two's complement)
|
|
***********************************************************************/
|
|
#define LL_MUL(r, a, b) ((r) = (a) * (b))
|
|
#define LL_DIV(r, a, b) ((r) = (a) / (b))
|
|
#define LL_MOD(r, a, b) ((r) = (a) % (b))
|
|
|
|
/***********************************************************************
|
|
** MACROS: LL_<shifting operators>
|
|
**
|
|
** LL_SHL Shift left [0..64] bits
|
|
** LL_SHR Shift right [0..64] bits with sign extension
|
|
** LL_USHR Unsigned shift right [0..64] bits
|
|
** LL_ISHL Signed shift left [0..64] bits
|
|
***********************************************************************/
|
|
#define LL_SHL(r, a, b) ((r) = (PRInt64)(a) << (b))
|
|
#define LL_SHR(r, a, b) ((r) = (PRInt64)(a) >> (b))
|
|
#define LL_USHR(r, a, b) ((r) = (PRUint64)(a) >> (b))
|
|
#define LL_ISHL(r, a, b) ((r) = (PRInt64)(a) << (b))
|
|
|
|
/***********************************************************************
|
|
** MACROS: LL_<conversion operators>
|
|
**
|
|
** LL_L2I Convert to signed 32 bit
|
|
** LL_L2UI Convert to unsigned 32 bit
|
|
** LL_L2F Convert to floating point
|
|
** LL_L2D Convert to floating point
|
|
** LL_I2L Convert signed to 64 bit
|
|
** LL_UI2L Convert unsigned to 64 bit
|
|
** LL_F2L Convert float to 64 bit
|
|
** LL_D2L Convert float to 64 bit
|
|
***********************************************************************/
|
|
#define LL_L2I(i, l) ((i) = (PRInt32)(l))
|
|
#define LL_L2UI(ui, l) ((ui) = (PRUint32)(l))
|
|
#define LL_L2F(f, l) ((f) = (PRFloat64)(l))
|
|
#define LL_L2D(d, l) ((d) = (PRFloat64)(l))
|
|
|
|
#define LL_I2L(l, i) ((l) = (PRInt64)(i))
|
|
#define LL_UI2L(l, ui) ((l) = (PRInt64)(ui))
|
|
#define LL_F2L(l, f) ((l) = (PRInt64)(f))
|
|
#define LL_D2L(l, d) ((l) = (PRInt64)(d))
|
|
|
|
/***********************************************************************
|
|
** MACROS: LL_UDIVMOD
|
|
** DESCRIPTION:
|
|
** Produce both a quotient and a remainder given an unsigned
|
|
** INPUTS: PRUint64 a: The dividend of the operation
|
|
** PRUint64 b: The quotient of the operation
|
|
** OUTPUTS: PRUint64 *qp: pointer to quotient
|
|
** PRUint64 *rp: pointer to remainder
|
|
***********************************************************************/
|
|
#define LL_UDIVMOD(qp, rp, a, b) \
|
|
(*(qp) = ((PRUint64)(a) / (b)), \
|
|
*(rp) = ((PRUint64)(a) % (b)))
|
|
|
|
#else /* !HAVE_LONG_LONG */
|
|
|
|
#define LL_MAXINT LL_MaxInt()
|
|
#define LL_MININT LL_MinInt()
|
|
#define LL_ZERO LL_Zero()
|
|
#define LL_MAXUINT LL_MaxUint()
|
|
|
|
#ifdef IS_LITTLE_ENDIAN
|
|
#define LL_INIT(hi, lo) {PR_UINT32(lo), PR_UINT32(hi)}
|
|
#else
|
|
#define LL_INIT(hi, lo) {PR_UINT32(hi), PR_UINT32(lo)}
|
|
#endif
|
|
|
|
#define LL_IS_ZERO(a) (((a).hi == 0) && ((a).lo == 0))
|
|
#define LL_EQ(a, b) (((a).hi == (b).hi) && ((a).lo == (b).lo))
|
|
#define LL_NE(a, b) (((a).hi != (b).hi) || ((a).lo != (b).lo))
|
|
#define LL_GE_ZERO(a) (((a).hi >> 31) == 0)
|
|
|
|
#define LL_CMP(a, op, b) (((a).hi == (b).hi) ? ((a).lo op (b).lo) : \
|
|
((PRInt32)(a).hi op (PRInt32)(b).hi))
|
|
#define LL_UCMP(a, op, b) (((a).hi == (b).hi) ? ((a).lo op (b).lo) : \
|
|
((a).hi op (b).hi))
|
|
|
|
#define LL_AND(r, a, b) ((r).lo = (a).lo & (b).lo, \
|
|
(r).hi = (a).hi & (b).hi)
|
|
#define LL_OR(r, a, b) ((r).lo = (a).lo | (b).lo, \
|
|
(r).hi = (a).hi | (b).hi)
|
|
#define LL_XOR(r, a, b) ((r).lo = (a).lo ^ (b).lo, \
|
|
(r).hi = (a).hi ^ (b).hi)
|
|
#define LL_OR2(r, a) ((r).lo = (r).lo | (a).lo, \
|
|
(r).hi = (r).hi | (a).hi)
|
|
#define LL_NOT(r, a) ((r).lo = ~(a).lo, \
|
|
(r).hi = ~(a).hi)
|
|
|
|
#define LL_NEG(r, a) ((r).lo = -(PRInt32)(a).lo, \
|
|
(r).hi = -(PRInt32)(a).hi - ((r).lo != 0))
|
|
#define LL_ADD(r, a, b) { \
|
|
PRInt64 _a, _b; \
|
|
_a = a; _b = b; \
|
|
(r).lo = _a.lo + _b.lo; \
|
|
(r).hi = _a.hi + _b.hi + ((r).lo < _b.lo); \
|
|
}
|
|
|
|
#define LL_SUB(r, a, b) { \
|
|
PRInt64 _a, _b; \
|
|
_a = a; _b = b; \
|
|
(r).lo = _a.lo - _b.lo; \
|
|
(r).hi = _a.hi - _b.hi - (_a.lo < _b.lo); \
|
|
}
|
|
|
|
#define LL_MUL(r, a, b) { \
|
|
PRInt64 _a, _b; \
|
|
_a = a; _b = b; \
|
|
LL_MUL32(r, _a.lo, _b.lo); \
|
|
(r).hi += _a.hi * _b.lo + _a.lo * _b.hi; \
|
|
}
|
|
|
|
#define _lo16(a) ((a) & PR_BITMASK(16))
|
|
#define _hi16(a) ((a) >> 16)
|
|
|
|
#define LL_MUL32(r, a, b) { \
|
|
PRUint32 _a1, _a0, _b1, _b0, _y0, _y1, _y2, _y3; \
|
|
_a1 = _hi16(a), _a0 = _lo16(a); \
|
|
_b1 = _hi16(b), _b0 = _lo16(b); \
|
|
_y0 = _a0 * _b0; \
|
|
_y1 = _a0 * _b1; \
|
|
_y2 = _a1 * _b0; \
|
|
_y3 = _a1 * _b1; \
|
|
_y1 += _hi16(_y0); /* can't carry */ \
|
|
_y1 += _y2; /* might carry */ \
|
|
if (_y1 < _y2) \
|
|
_y3 += (PRUint32)(PR_BIT(16)); /* propagate */ \
|
|
(r).lo = (_lo16(_y1) << 16) + _lo16(_y0); \
|
|
(r).hi = _y3 + _hi16(_y1); \
|
|
}
|
|
|
|
#define LL_UDIVMOD(qp, rp, a, b) ll_udivmod(qp, rp, a, b)
|
|
|
|
NSPR_API(void) ll_udivmod(PRUint64 *qp, PRUint64 *rp, PRUint64 a, PRUint64 b);
|
|
|
|
#define LL_DIV(r, a, b) { \
|
|
PRInt64 _a, _b; \
|
|
PRUint32 _negative = (PRInt32)(a).hi < 0; \
|
|
if (_negative) { \
|
|
LL_NEG(_a, a); \
|
|
} else { \
|
|
_a = a; \
|
|
} \
|
|
if ((PRInt32)(b).hi < 0) { \
|
|
_negative ^= 1; \
|
|
LL_NEG(_b, b); \
|
|
} else { \
|
|
_b = b; \
|
|
} \
|
|
LL_UDIVMOD(&(r), 0, _a, _b); \
|
|
if (_negative) \
|
|
LL_NEG(r, r); \
|
|
}
|
|
|
|
#define LL_MOD(r, a, b) { \
|
|
PRInt64 _a, _b; \
|
|
PRUint32 _negative = (PRInt32)(a).hi < 0; \
|
|
if (_negative) { \
|
|
LL_NEG(_a, a); \
|
|
} else { \
|
|
_a = a; \
|
|
} \
|
|
if ((PRInt32)(b).hi < 0) { \
|
|
LL_NEG(_b, b); \
|
|
} else { \
|
|
_b = b; \
|
|
} \
|
|
LL_UDIVMOD(0, &(r), _a, _b); \
|
|
if (_negative) \
|
|
LL_NEG(r, r); \
|
|
}
|
|
|
|
#define LL_SHL(r, a, b) { \
|
|
if (b) { \
|
|
PRInt64 _a; \
|
|
_a = a; \
|
|
if ((b) < 32) { \
|
|
(r).lo = _a.lo << ((b) & 31); \
|
|
(r).hi = (_a.hi << ((b) & 31)) | (_a.lo >> (32 - (b))); \
|
|
} else { \
|
|
(r).lo = 0; \
|
|
(r).hi = _a.lo << ((b) & 31); \
|
|
} \
|
|
} else { \
|
|
(r) = (a); \
|
|
} \
|
|
}
|
|
|
|
/* a is an PRInt32, b is PRInt32, r is PRInt64 */
|
|
#define LL_ISHL(r, a, b) { \
|
|
if (b) { \
|
|
PRInt64 _a; \
|
|
_a.lo = (a); \
|
|
_a.hi = 0; \
|
|
if ((b) < 32) { \
|
|
(r).lo = (a) << ((b) & 31); \
|
|
(r).hi = ((a) >> (32 - (b))); \
|
|
} else { \
|
|
(r).lo = 0; \
|
|
(r).hi = (a) << ((b) & 31); \
|
|
} \
|
|
} else { \
|
|
(r).lo = (a); \
|
|
(r).hi = 0; \
|
|
} \
|
|
}
|
|
|
|
#define LL_SHR(r, a, b) { \
|
|
if (b) { \
|
|
PRInt64 _a; \
|
|
_a = a; \
|
|
if ((b) < 32) { \
|
|
(r).lo = (_a.hi << (32 - (b))) | (_a.lo >> ((b) & 31)); \
|
|
(r).hi = (PRInt32)_a.hi >> ((b) & 31); \
|
|
} else { \
|
|
(r).lo = (PRInt32)_a.hi >> ((b) & 31); \
|
|
(r).hi = (PRInt32)_a.hi >> 31; \
|
|
} \
|
|
} else { \
|
|
(r) = (a); \
|
|
} \
|
|
}
|
|
|
|
#define LL_USHR(r, a, b) { \
|
|
if (b) { \
|
|
PRInt64 _a; \
|
|
_a = a; \
|
|
if ((b) < 32) { \
|
|
(r).lo = (_a.hi << (32 - (b))) | (_a.lo >> ((b) & 31)); \
|
|
(r).hi = _a.hi >> ((b) & 31); \
|
|
} else { \
|
|
(r).lo = _a.hi >> ((b) & 31); \
|
|
(r).hi = 0; \
|
|
} \
|
|
} else { \
|
|
(r) = (a); \
|
|
} \
|
|
}
|
|
|
|
#define LL_L2I(i, l) ((i) = (l).lo)
|
|
#define LL_L2UI(ui, l) ((ui) = (l).lo)
|
|
#define LL_L2F(f, l) { double _d; LL_L2D(_d, l); (f) = (PRFloat64)_d; }
|
|
|
|
#define LL_L2D(d, l) { \
|
|
int _negative; \
|
|
PRInt64 _absval; \
|
|
\
|
|
_negative = (l).hi >> 31; \
|
|
if (_negative) { \
|
|
LL_NEG(_absval, l); \
|
|
} else { \
|
|
_absval = l; \
|
|
} \
|
|
(d) = (double)_absval.hi * 4.294967296e9 + _absval.lo; \
|
|
if (_negative) \
|
|
(d) = -(d); \
|
|
}
|
|
|
|
#define LL_I2L(l, i) { PRInt32 _i = ((PRInt32)(i)) >> 31; (l).lo = (i); (l).hi = _i; }
|
|
#define LL_UI2L(l, ui) ((l).lo = (ui), (l).hi = 0)
|
|
#define LL_F2L(l, f) { double _d = (double)f; LL_D2L(l, _d); }
|
|
|
|
#define LL_D2L(l, d) { \
|
|
int _negative; \
|
|
double _absval, _d_hi; \
|
|
PRInt64 _lo_d; \
|
|
\
|
|
_negative = ((d) < 0); \
|
|
_absval = _negative ? -(d) : (d); \
|
|
\
|
|
(l).hi = _absval / 4.294967296e9; \
|
|
(l).lo = 0; \
|
|
LL_L2D(_d_hi, l); \
|
|
_absval -= _d_hi; \
|
|
_lo_d.hi = 0; \
|
|
if (_absval < 0) { \
|
|
_lo_d.lo = -_absval; \
|
|
LL_SUB(l, l, _lo_d); \
|
|
} else { \
|
|
_lo_d.lo = _absval; \
|
|
LL_ADD(l, l, _lo_d); \
|
|
} \
|
|
\
|
|
if (_negative) \
|
|
LL_NEG(l, l); \
|
|
}
|
|
|
|
#endif /* !HAVE_LONG_LONG */
|
|
|
|
PR_END_EXTERN_C
|
|
|
|
#endif /* prlong_h___ */
|