#ifndef _MATH_64_H_
#define _MATH_64_H_

#include "types.h"

#define COMPILER_SUPPORTS_LONG_LONG		//undefine if compiler doe snot uspport long long


#ifdef COMPILER_SUPPORTS_LONG_LONG

typedef unsigned long long UInt64;

static inline UInt64 u64_from_halves(UInt32 hi, UInt32 lo)	{ return (((UInt64)hi) << 32ULL) | ((UInt64)lo);		}
static inline UInt64 u64_32_to_64(UInt32 v)			{ return (UInt64)v;						}
static inline UInt32 u64_64_to_32(UInt64 v)			{ return (UInt32)v;						}
static inline UInt32 u64_get_hi(UInt64 v)			{ return (UInt32)(v >> 32ULL);					}
static inline UInt64 u64_add(UInt64 a, UInt64 b)		{ return a + b;							}
static inline UInt64 u64_add32(UInt64 a, UInt32 b)		{ return a + (UInt64)b;						}
static inline UInt64 u64_umul3232(UInt32 a, UInt32 b)		{ return ((UInt64)a) * ((UInt64)b);				}	//sad but true: gcc has no u32xu32->64 multiply
static inline UInt64 u64_smul3232(Int32 a, Int32 b)		{ return ((signed long long)a) * ((signed long long)b);		}	//sad but true: gcc has no s32xs32->64 multiply
static inline UInt64 u64_shr(UInt64 a, unsigned bits)		{ return a >> (UInt64)bits;					}
static inline UInt64 u64_shl(UInt64 a, unsigned bits)		{ return a << (UInt64)bits;					}
static inline UInt64 u64_xtnd32(UInt64 a)			{ if(a & 0x80000000UL) a |= (((UInt64)-1) << 32ULL); return a;	}
static inline Boolean u64_isZero(UInt64 a)			{ return a == 0; 						}
static inline UInt64 u64_inc(UInt64 a)				{ return a + 1ULL;						}
static inline UInt64 u64_and(UInt64 a, UInt64 b)		{ return a & b;							}
static inline UInt64 u64_zero(void)				{ return 0;							}
static inline UInt64 u64_sub(UInt64 a, UInt64 b)		{ return a - b;							}

#else

typedef struct{
	
	UInt32 hi, lo;
}UInt64;


UInt64 u64_from_halves(UInt32 hi, UInt32 lo);
UInt64 u64_32_to_64(UInt32 v);
UInt32 u64_64_to_32(UInt64 v);
UInt32 u64_get_hi(UInt64 v);
UInt64 u64_add(UInt64 a, UInt64 b);
UInt64 u64_umul3232(UInt32 a, UInt32 b);
UInt64 u64_smul3232(Int32 a, Int32 b);
UInt64 u64_shr(UInt64 a, unsigned bits);
UInt64 u64_shl(UInt64 a, unsigned bits);
UInt64 u64_add32(UInt64 a, UInt32 b);
UInt64 u64_xtnd32(UInt64 a);
Boolean u64_isZero(UInt64 a);
UInt64 u64_inc(UInt64 a);
UInt64 u64_zero(void);
UInt64 u64_sub(UInt64 a, UInt64 b);



UInt64 u64_and(UInt64 a, UInt64 b);

#endif



#endif