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Avoid <limits> to determine vector register numeric_limits<>. This fixes

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build with ancient compilers like gcc "2.96".
This commit is contained in:
gbeauche 2005-06-22 12:27:01 +00:00
parent 3aa78832fc
commit 28a167b3bd
1 changed files with 32 additions and 5 deletions
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37
SheepShaver/src/kpx_cpu/src/cpu/ppc/ppc-operands.hpp
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@ -21,7 +21,34 @@
#ifndef PPC_OPERANDS_H
#define PPC_OPERANDS_H
#include <limits>
/**
* Numerical limits of vector registers components
**/
template< class type >
struct vector_numeric_limits {
static type min() throw();
static type max() throw();
};
#define DEFINE_NUMERIC_LIMITS(TYPE, SMAX, USFX) \
template<> \
struct vector_numeric_limits<TYPE> { \
static inline TYPE min() throw() { return -(SMAX) - 1; } \
static inline TYPE max() throw() { return SMAX; } \
}; \
template<> \
struct vector_numeric_limits<u##TYPE> { \
static inline u##TYPE min() throw() { return 0##USFX; } \
static inline u##TYPE max() throw() { return SMAX * 2##USFX + 1; } \
}
DEFINE_NUMERIC_LIMITS( int8, 127, U);
DEFINE_NUMERIC_LIMITS(int16, 32767, U);
DEFINE_NUMERIC_LIMITS(int32, 2147483647L, UL);
DEFINE_NUMERIC_LIMITS(int64, 9223372036854775807LL, ULL);
#undef DEFINE_NUMERIC_LIMITS
/**
* Compile time checks
@ -196,12 +223,12 @@ struct vector_saturate_operand : input_vr< field >, output_vr< field > {
static const uint32 element_size = sizeof(value_type);
static inline bool saturate(element_type & v) {
bool sat = false;
if (v > std::numeric_limits<value_type>::max()) {
v = std::numeric_limits<value_type>::max();
if (v > vector_numeric_limits<value_type>::max()) {
v = vector_numeric_limits<value_type>::max();
sat = true;
}
else if (v < std::numeric_limits<value_type>::min()) {
v = std::numeric_limits<value_type>::min();
else if (v < vector_numeric_limits<value_type>::min()) {
v = vector_numeric_limits<value_type>::min();
sat = true;
}
return sat;