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math64.h
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math64.h
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#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