ossp-pkg/js/src/jslong.h
1.2
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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* 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
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* http://www.mozilla.org/MPL/
*
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* 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 Mozilla Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of 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"),
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/*
** File: jslong.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 jslong_h___
#define jslong_h___
#include "jstypes.h"
JS_BEGIN_EXTERN_C
#ifdef OSSP
#define JSLL_MaxInt JS_LL_MaxInt
#define JSLL_MinInt JS_LL_MinInt
#define JSLL_Zero JS_LL_Zero
#define jsll_udivmod js_ll_udivmod
#endif
/***********************************************************************
** DEFINES: JSLL_MaxInt
** JSLL_MinInt
** JSLL_Zero
** DESCRIPTION:
** Various interesting constants and static variable
** initializer
***********************************************************************/
#ifdef HAVE_WATCOM_BUG_2
JSInt64 __pascal __loadds __export
JSLL_MaxInt(void);
JSInt64 __pascal __loadds __export
JSLL_MinInt(void);
JSInt64 __pascal __loadds __export
JSLL_Zero(void);
#else
extern JS_PUBLIC_API(JSInt64) JSLL_MaxInt(void);
extern JS_PUBLIC_API(JSInt64) JSLL_MinInt(void);
extern JS_PUBLIC_API(JSInt64) JSLL_Zero(void);
#endif
#define JSLL_MAXINT JSLL_MaxInt()
#define JSLL_MININT JSLL_MinInt()
#define JSLL_ZERO JSLL_Zero()
#ifdef JS_HAVE_LONG_LONG
#if JS_BYTES_PER_LONG == 8
#define JSLL_INIT(hi, lo) ((hi ## L << 32) + lo ## L)
#elif (defined(WIN32) || defined(WIN16)) && !defined(__GNUC__)
#define JSLL_INIT(hi, lo) ((hi ## i64 << 32) + lo ## i64)
#else
#define JSLL_INIT(hi, lo) ((hi ## LL << 32) + lo ## LL)
#endif
/***********************************************************************
** MACROS: JSLL_*
** DESCRIPTION:
** The following macros define portable access to the 64 bit
** math facilities.
**
***********************************************************************/
/***********************************************************************
** MACROS: JSLL_<relational operators>
**
** JSLL_IS_ZERO Test for zero
** JSLL_EQ Test for equality
** JSLL_NE Test for inequality
** JSLL_GE_ZERO Test for zero or positive
** JSLL_CMP Compare two values
***********************************************************************/
#define JSLL_IS_ZERO(a) ((a) == 0)
#define JSLL_EQ(a, b) ((a) == (b))
#define JSLL_NE(a, b) ((a) != (b))
#define JSLL_GE_ZERO(a) ((a) >= 0)
#define JSLL_CMP(a, op, b) ((JSInt64)(a) op (JSInt64)(b))
#define JSLL_UCMP(a, op, b) ((JSUint64)(a) op (JSUint64)(b))
/***********************************************************************
** MACROS: JSLL_<logical operators>
**
** JSLL_AND Logical and
** JSLL_OR Logical or
** JSLL_XOR Logical exclusion
** JSLL_OR2 A disgusting deviation
** JSLL_NOT Negation (one's compliment)
***********************************************************************/
#define JSLL_AND(r, a, b) ((r) = (a) & (b))
#define JSLL_OR(r, a, b) ((r) = (a) | (b))
#define JSLL_XOR(r, a, b) ((r) = (a) ^ (b))
#define JSLL_OR2(r, a) ((r) = (r) | (a))
#define JSLL_NOT(r, a) ((r) = ~(a))
/***********************************************************************
** MACROS: JSLL_<mathematical operators>
**
** JSLL_NEG Negation (two's compliment)
** JSLL_ADD Summation (two's compliment)
** JSLL_SUB Difference (two's compliment)
***********************************************************************/
#define JSLL_NEG(r, a) ((r) = -(a))
#define JSLL_ADD(r, a, b) ((r) = (a) + (b))
#define JSLL_SUB(r, a, b) ((r) = (a) - (b))
/***********************************************************************
** MACROS: JSLL_<mathematical operators>
**
** JSLL_MUL Product (two's compliment)
** JSLL_DIV Quotient (two's compliment)
** JSLL_MOD Modulus (two's compliment)
***********************************************************************/
#define JSLL_MUL(r, a, b) ((r) = (a) * (b))
#define JSLL_DIV(r, a, b) ((r) = (a) / (b))
#define JSLL_MOD(r, a, b) ((r) = (a) % (b))
/***********************************************************************
** MACROS: JSLL_<shifting operators>
**
** JSLL_SHL Shift left [0..64] bits
** JSLL_SHR Shift right [0..64] bits with sign extension
** JSLL_USHR Unsigned shift right [0..64] bits
** JSLL_ISHL Signed shift left [0..64] bits
***********************************************************************/
#define JSLL_SHL(r, a, b) ((r) = (JSInt64)(a) << (b))
#define JSLL_SHR(r, a, b) ((r) = (JSInt64)(a) >> (b))
#define JSLL_USHR(r, a, b) ((r) = (JSUint64)(a) >> (b))
#define JSLL_ISHL(r, a, b) ((r) = (JSInt64)(a) << (b))
/***********************************************************************
** MACROS: JSLL_<conversion operators>
**
** JSLL_L2I Convert to signed 32 bit
** JSLL_L2UI Convert to unsigned 32 bit
** JSLL_L2F Convert to floating point
** JSLL_L2D Convert to floating point
** JSLL_I2L Convert signed to 64 bit
** JSLL_UI2L Convert unsigned to 64 bit
** JSLL_F2L Convert float to 64 bit
** JSLL_D2L Convert float to 64 bit
***********************************************************************/
#define JSLL_L2I(i, l) ((i) = (JSInt32)(l))
#define JSLL_L2UI(ui, l) ((ui) = (JSUint32)(l))
#define JSLL_L2F(f, l) ((f) = (JSFloat64)(l))
#define JSLL_L2D(d, l) ((d) = (JSFloat64)(l))
#define JSLL_I2L(l, i) ((l) = (JSInt64)(i))
#define JSLL_UI2L(l, ui) ((l) = (JSInt64)(ui))
#define JSLL_F2L(l, f) ((l) = (JSInt64)(f))
#define JSLL_D2L(l, d) ((l) = (JSInt64)(d))
/***********************************************************************
** MACROS: JSLL_UDIVMOD
** DESCRIPTION:
** Produce both a quotient and a remainder given an unsigned
** INPUTS: JSUint64 a: The dividend of the operation
** JSUint64 b: The quotient of the operation
** OUTPUTS: JSUint64 *qp: pointer to quotient
** JSUint64 *rp: pointer to remainder
***********************************************************************/
#define JSLL_UDIVMOD(qp, rp, a, b) \
(*(qp) = ((JSUint64)(a) / (b)), \
*(rp) = ((JSUint64)(a) % (b)))
#else /* !JS_HAVE_LONG_LONG */
#ifdef IS_LITTLE_ENDIAN
#define JSLL_INIT(hi, lo) {JS_INT32(lo), JS_INT32(hi)}
#else
#define JSLL_INIT(hi, lo) {JS_INT32(hi), JS_INT32(lo)}
#endif
#define JSLL_IS_ZERO(a) (((a).hi == 0) && ((a).lo == 0))
#define JSLL_EQ(a, b) (((a).hi == (b).hi) && ((a).lo == (b).lo))
#define JSLL_NE(a, b) (((a).hi != (b).hi) || ((a).lo != (b).lo))
#define JSLL_GE_ZERO(a) (((a).hi >> 31) == 0)
#ifdef DEBUG
#define JSLL_CMP(a, op, b) (JS_ASSERT((#op)[1] != '='), JSLL_REAL_CMP(a, op, b))
#define JSLL_UCMP(a, op, b) (JS_ASSERT((#op)[1] != '='), JSLL_REAL_UCMP(a, op, b))
#else
#define JSLL_CMP(a, op, b) JSLL_REAL_CMP(a, op, b)
#define JSLL_UCMP(a, op, b) JSLL_REAL_UCMP(a, op, b)
#endif
#define JSLL_REAL_CMP(a,op,b) (((JSInt32)(a).hi op (JSInt32)(b).hi) || \
(((a).hi == (b).hi) && ((a).lo op (b).lo)))
#define JSLL_REAL_UCMP(a,op,b) (((a).hi op (b).hi) || \
(((a).hi == (b).hi) && ((a).lo op (b).lo)))
#define JSLL_AND(r, a, b) ((r).lo = (a).lo & (b).lo, \
(r).hi = (a).hi & (b).hi)
#define JSLL_OR(r, a, b) ((r).lo = (a).lo | (b).lo, \
(r).hi = (a).hi | (b).hi)
#define JSLL_XOR(r, a, b) ((r).lo = (a).lo ^ (b).lo, \
(r).hi = (a).hi ^ (b).hi)
#define JSLL_OR2(r, a) ((r).lo = (r).lo | (a).lo, \
(r).hi = (r).hi | (a).hi)
#define JSLL_NOT(r, a) ((r).lo = ~(a).lo, \
(r).hi = ~(a).hi)
#define JSLL_NEG(r, a) ((r).lo = -(JSInt32)(a).lo, \
(r).hi = -(JSInt32)(a).hi - ((r).lo != 0))
#define JSLL_ADD(r, a, b) { \
JSInt64 _a, _b; \
_a = a; _b = b; \
(r).lo = _a.lo + _b.lo; \
(r).hi = _a.hi + _b.hi + ((r).lo < _b.lo); \
}
#define JSLL_SUB(r, a, b) { \
JSInt64 _a, _b; \
_a = a; _b = b; \
(r).lo = _a.lo - _b.lo; \
(r).hi = _a.hi - _b.hi - (_a.lo < _b.lo); \
}
#define JSLL_MUL(r, a, b) { \
JSInt64 _a, _b; \
_a = a; _b = b; \
JSLL_MUL32(r, _a.lo, _b.lo); \
(r).hi += _a.hi * _b.lo + _a.lo * _b.hi; \
}
#define jslo16(a) ((a) & JS_BITMASK(16))
#define jshi16(a) ((a) >> 16)
#define JSLL_MUL32(r, a, b) { \
JSUint32 _a1, _a0, _b1, _b0, _y0, _y1, _y2, _y3; \
_a1 = jshi16(a), _a0 = jslo16(a); \
_b1 = jshi16(b), _b0 = jslo16(b); \
_y0 = _a0 * _b0; \
_y1 = _a0 * _b1; \
_y2 = _a1 * _b0; \
_y3 = _a1 * _b1; \
_y1 += jshi16(_y0); /* can't carry */ \
_y1 += _y2; /* might carry */ \
if (_y1 < _y2) \
_y3 += (JSUint32)(JS_BIT(16)); /* propagate */ \
(r).lo = (jslo16(_y1) << 16) + jslo16(_y0); \
(r).hi = _y3 + jshi16(_y1); \
}
#define JSLL_UDIVMOD(qp, rp, a, b) jsll_udivmod(qp, rp, a, b)
extern JS_PUBLIC_API(void) jsll_udivmod(JSUint64 *qp, JSUint64 *rp, JSUint64 a, JSUint64 b);
#define JSLL_DIV(r, a, b) { \
JSInt64 _a, _b; \
JSUint32 _negative = (JSInt32)(a).hi < 0; \
if (_negative) { \
JSLL_NEG(_a, a); \
} else { \
_a = a; \
} \
if ((JSInt32)(b).hi < 0) { \
_negative ^= 1; \
JSLL_NEG(_b, b); \
} else { \
_b = b; \
} \
JSLL_UDIVMOD(&(r), 0, _a, _b); \
if (_negative) \
JSLL_NEG(r, r); \
}
#define JSLL_MOD(r, a, b) { \
JSInt64 _a, _b; \
JSUint32 _negative = (JSInt32)(a).hi < 0; \
if (_negative) { \
JSLL_NEG(_a, a); \
} else { \
_a = a; \
} \
if ((JSInt32)(b).hi < 0) { \
JSLL_NEG(_b, b); \
} else { \
_b = b; \
} \
JSLL_UDIVMOD(0, &(r), _a, _b); \
if (_negative) \
JSLL_NEG(r, r); \
}
#define JSLL_SHL(r, a, b) { \
if (b) { \
JSInt64 _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 JSInt32, b is JSInt32, r is JSInt64 */
#define JSLL_ISHL(r, a, b) { \
if (b) { \
JSInt64 _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 JSLL_SHR(r, a, b) { \
if (b) { \
JSInt64 _a; \
_a = a; \
if ((b) < 32) { \
(r).lo = (_a.hi << (32 - (b))) | (_a.lo >> ((b) & 31)); \
(r).hi = (JSInt32)_a.hi >> ((b) & 31); \
} else { \
(r).lo = (JSInt32)_a.hi >> ((b) & 31); \
(r).hi = (JSInt32)_a.hi >> 31; \
} \
} else { \
(r) = (a); \
} \
}
#define JSLL_USHR(r, a, b) { \
if (b) { \
JSInt64 _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 JSLL_L2I(i, l) ((i) = (l).lo)
#define JSLL_L2UI(ui, l) ((ui) = (l).lo)
#define JSLL_L2F(f, l) { double _d; JSLL_L2D(_d, l); (f) = (JSFloat64)_d; }
#define JSLL_L2D(d, l) { \
int _negative; \
JSInt64 _absval; \
\
_negative = (l).hi >> 31; \
if (_negative) { \
JSLL_NEG(_absval, l); \
} else { \
_absval = l; \
} \
(d) = (double)_absval.hi * 4.294967296e9 + _absval.lo; \
if (_negative) \
(d) = -(d); \
}
#define JSLL_I2L(l, i) { JSInt32 _i = (i) >> 31; (l).lo = (i); (l).hi = _i; }
#define JSLL_UI2L(l, ui) ((l).lo = (ui), (l).hi = 0)
#define JSLL_F2L(l, f) { double _d = (double)f; JSLL_D2L(l, _d); }
#define JSLL_D2L(l, d) { \
int _negative; \
double _absval, _d_hi; \
JSInt64 _lo_d; \
\
_negative = ((d) < 0); \
_absval = _negative ? -(d) : (d); \
\
(l).hi = _absval / 4.294967296e9; \
(l).lo = 0; \
JSLL_L2D(_d_hi, l); \
_absval -= _d_hi; \
_lo_d.hi = 0; \
if (_absval < 0) { \
_lo_d.lo = -_absval; \
JSLL_SUB(l, l, _lo_d); \
} else { \
_lo_d.lo = _absval; \
JSLL_ADD(l, l, _lo_d); \
} \
\
if (_negative) \
JSLL_NEG(l, l); \
}
#endif /* !JS_HAVE_LONG_LONG */
JS_END_EXTERN_C
#endif /* jslong_h___ */
