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added support for sparc processors

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[SVN r9719]
This commit is contained in:
John Maddock
2001-04-05 11:32:56 +00:00
parent 76d01f8824
commit 3bccc557e2
1 changed files with 54 additions and 13 deletions
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67
include/boost/detail/limits.hpp
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@ -19,7 +19,11 @@
*/
/*
* Modified by Jens Maurer for gcc 2.95 on x86.
* Revision history:
* 5 Apr 2001:
* Added sparc (big endian) processor support (John Maddock).
* Initial sub:
* Modified by Jens Maurer for gcc 2.95 on x86.
*/
#ifndef BOOST_SGI_CPP_LIMITS
@ -29,8 +33,10 @@
#include <cfloat>
#include <boost/config.hpp>
#ifndef __i386__
#error This file is intended to be used with x86 CPUs.
#if defined(__sparc) || defined(__sparc__)
#define BOOST_BIG_ENDIAN
#elif !defined(__i386__)
#error This file is not correctly set up for your cpu type.
#endif
namespace std {
@ -152,17 +158,31 @@ public:
BOOST_STL_DECLARE_LIMITS_MEMBER(bool, is_modulo, true);
};
template<class __number, unsigned int __Word>
#if defined(BOOST_BIG_ENDIAN)
template<class Number, unsigned int Word>
struct float_helper{
static __number __get_word() throw() {
// sizeof(long double) == 12, but only 10 bytes significant
const unsigned int _S_word[4] = { 0, 0, 0, __Word };
return *reinterpret_cast<const __number*>(
reinterpret_cast<const char *>(&_S_word)+16-
(sizeof(__number) == 12 ? 10 : sizeof(__number)));
static Number get_word() throw() {
// sizeof(long double) == 16
const unsigned int _S_word[4] = { Word, 0, 0, 0 };
return *reinterpret_cast<const Number*>(&_S_word);
}
};
#else
template<class Number, unsigned int Word>
struct float_helper{
static Number get_word() throw() {
// sizeof(long double) == 12, but only 10 bytes significant
const unsigned int _S_word[4] = { 0, 0, 0, Word };
return *reinterpret_cast<const Number*>(
reinterpret_cast<const char *>(&_S_word)+16-
(sizeof(Number) == 12 ? 10 : sizeof(Number)));
}
};
#endif
// Base class for floating-point numbers.
template <class __number,
@ -200,13 +220,13 @@ public:
static __number infinity() throw() {
return float_helper<__number, __InfinityWord>::__get_word();
return float_helper<__number, __InfinityWord>::get_word();
}
static __number quiet_NaN() throw() {
return float_helper<__number,__QNaNWord>::__get_word();
return float_helper<__number,__QNaNWord>::get_word();
}
static __number signaling_NaN() throw() {
return float_helper<__number,__SNaNWord>::__get_word();
return float_helper<__number,__SNaNWord>::get_word();
}
BOOST_STL_DECLARE_LIMITS_MEMBER(bool, is_iec559, __IsIEC559);
@ -323,9 +343,15 @@ template<> class numeric_limits<float>
FLT_MAX_EXP, // Maximum exponent
FLT_MIN_10_EXP, // Minimum base 10 exponent
FLT_MAX_10_EXP, // Maximum base 10 exponent
#if defined(BOOST_BIG_ENDIAN)
0x7f80 << (sizeof(int)*CHAR_BIT-16), // Last word of +infinity
0x7f81 << (sizeof(int)*CHAR_BIT-16), // Last word of quiet NaN
0x7fc1 << (sizeof(int)*CHAR_BIT-16), // Last word of signaling NaN
#else
0x7f800000u, // Last word of +infinity
0x7f810000u, // Last word of quiet NaN
0x7fc10000u, // Last word of signaling NaN
#endif
true, // conforms to iec559
round_to_nearest>
{
@ -345,9 +371,15 @@ template<> class numeric_limits<double>
DBL_MAX_EXP, // Maximum exponent
DBL_MIN_10_EXP, // Minimum base 10 exponent
DBL_MAX_10_EXP, // Maximum base 10 exponent
#if defined(BOOST_BIG_ENDIAN)
0x7ff0 << (sizeof(int)*CHAR_BIT-16), // Last word of +infinity
0x7ff1 << (sizeof(int)*CHAR_BIT-16), // Last word of quiet NaN
0x7ff9 << (sizeof(int)*CHAR_BIT-16), // Last word of signaling NaN
#else
0x7ff00000u, // Last word of +infinity
0x7ff10000u, // Last word of quiet NaN
0x7ff90000u, // Last word of signaling NaN
#endif
true, // conforms to iec559
round_to_nearest>
{
@ -367,9 +399,15 @@ template<> class numeric_limits<long double>
LDBL_MAX_EXP, // Maximum exponent
LDBL_MIN_10_EXP,// Minimum base 10 exponent
LDBL_MAX_10_EXP,// Maximum base 10 exponent
#if defined(BOOST_BIG_ENDIAN)
0x7ff0 << (sizeof(int)*CHAR_BIT-16), // Last word of +infinity
0x7ff1 << (sizeof(int)*CHAR_BIT-16), // Last word of quiet NaN
0x7ff9 << (sizeof(int)*CHAR_BIT-16), // Last word of signaling NaN
#else
0x7fff8000u, // Last word of +infinity
0x7fffc000u, // Last word of quiet NaN
0x7fff9000u, // Last word of signaling NaN
#endif
false, // Doesn't conform to iec559
round_to_nearest>
{
@ -388,3 +426,6 @@ public:
// Local Variables:
// mode:C++
// End: