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/*
** (c) 1996-2000 The Regents of the University of California (through
** E.O. Lawrence Berkeley National Laboratory), subject to approval by
** the U.S. Department of Energy. Your use of this software is under
** license -- the license agreement is attached and included in the
** directory as license.txt or you may contact Berkeley Lab's Technology
** Transfer Department at TTD@lbl.gov. NOTICE OF U.S. GOVERNMENT RIGHTS.
** The Software was developed under funding from the U.S. Government
** which consequently retains certain rights as follows: the
** U.S. Government has been granted for itself and others acting on its
** behalf a paid-up, nonexclusive, irrevocable, worldwide license in the
** Software to reproduce, prepare derivative works, and perform publicly
** and display publicly. Beginning five (5) years after the date
** permission to assert copyright is obtained from the U.S. Department of
** Energy, and subject to any subsequent five (5) year renewals, the
** U.S. Government is granted for itself and others acting on its behalf
** a paid-up, nonexclusive, irrevocable, worldwide license in the
** Software to reproduce, prepare derivative works, distribute copies to
** the public, perform publicly and display publicly, and to permit
** others to do so.
*/
//
// $Id: FPC.cpp,v 1.6 2001/07/19 16:57:32 lijewski Exp $
//
#include <FPC.H>
#include <endian.h>
//
// FP orders.
//
const int FPC::normal_float_order[] = { 1, 2, 3, 4 };
const int FPC::reverse_float_order[] = { 4, 3, 2, 1 };
const int FPC::reverse_float_order_2[] = { 2, 1, 4, 3 };
const int FPC::normal_double_order[] = { 1, 2, 3, 4, 5, 6, 7, 8 };
const int FPC::reverse_double_order[] = { 8, 7, 6, 5, 4, 3, 2, 1 };
const int FPC::reverse_double_order_2[] = { 2, 1, 4, 3, 6, 5, 8, 7 };
const int FPC::cray_float_order[] = { 1, 2, 3, 4, 5, 6, 7, 8 };
//
// Floating point formats.
//
const long FPC::ieee_float[] = { 32L, 8L, 23L, 0L, 1L, 9L, 0L, 0x7FL };
const long FPC::ieee_double[] = { 64L, 11L, 52L, 0L, 1L, 12L, 0L, 0x3FFL };
const long FPC::cray_float[] = { 64L, 15L, 48L, 0L, 1L, 16L, 1L, 0x4000L };
//
// Every copy of the library will have exactly one
// `nativeLongDescriptor' and `nativeRealDescriptor' compiled into it.
// Each machine on which BoxLib runs MUST have them defined below.
//
// For non-specifically defined systems, assume that middle-endian ordering is no longer
// used, and rely on __BYTE_ORDER working
const
IntDescriptor&
FPC::NativeLongDescriptor ()
{
#if (defined(__alpha) || defined(__i486__) || defined(WIN32) || defined(i386) || defined(__i386__) || defined(__ia64__) || defined(__x86_64__)) || (__BYTE_ORDER == __LITTLE_ENDIAN)
static const IntDescriptor nld(sizeof(long), IntDescriptor::ReverseOrder);
#endif
#ifdef _CRAY1
static const IntDescriptor nld(sizeof(long), IntDescriptor::NormalOrder);
#endif
#if ( defined(__sgi) || \
defined(__sun) || \
defined(_AIX) || \
defined(_CRAYT3E) || \
defined(__hpux) || \
defined(__hppa__) || \
defined(__m68k__) ) || \
( __BYTE_ORDER == __BIG_ENDIAN )
static const IntDescriptor nld(sizeof(long), IntDescriptor::NormalOrder);
#endif
return nld;
}
const
RealDescriptor&
FPC::NativeRealDescriptor ()
{
#if (defined(__alpha) || defined(__i486__) || defined(WIN32) || defined(i386) || defined(__i386__) || defined(__ia64__) || defined(__x86_64__)) || ( __BYTE_ORDER == __LITTLE_ENDIAN)
#ifdef BL_USE_FLOAT
static const RealDescriptor nrd(ieee_float, reverse_float_order, 4);
#else
static const RealDescriptor nrd(ieee_double, reverse_double_order, 8);
#endif
#endif
#ifdef _CRAY1
static const RealDescriptor nrd(cray_float, cray_float_order, 8);
#endif
#if (defined(__sgi) || \
defined(__sun) || \
defined(_AIX) || \
defined(_CRAYT3E) || \
defined(__hpux) ) || ( __BYTE_ORDER == __BIG_ENDIAN)
#ifdef BL_USE_FLOAT
static const RealDescriptor nrd(ieee_float, normal_float_order, 4);
#else
static const RealDescriptor nrd(ieee_double, normal_double_order, 8);
#endif
#endif
return nrd;
}
const
RealDescriptor&
FPC::CrayRealDescriptor ()
{
static const RealDescriptor crd(cray_float, cray_float_order, 8);
return crd;
}
const
RealDescriptor&
FPC::Ieee32NormalRealDescriptor ()
{
static const RealDescriptor i32rd(ieee_float, normal_float_order, 4);
return i32rd;
}
const
RealDescriptor&
FPC::Ieee64NormalRealDescriptor ()
{
static const RealDescriptor i64rd(ieee_double, normal_double_order, 8);
return i64rd;
}
//
// TODO -- add more machine descriptions.
//
#if !(defined(__alpha) || \
defined(_CRAY1) || \
defined(_CRAYT3E) || \
defined(__sgi) || \
defined(__sun) || \
defined(__i486__) || \
defined(i386) || \
defined(__i386__) || \
defined(__ia64__) || \
defined(__x86_64__) || \
defined(__hpux) || \
defined(_MSC_VER) || \
defined(_AIX))
#warning "Assuming floating-point order from byte-order"
#endif
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