ISAAC64Random.cpp File Reference

#include <cstring>
#include "../TypeDefs.h"
#include "standard.h"
#include "ISAAC64Random.h"

Include dependency graph for ISAAC64Random.cpp:

Macros
#define	ind(mm, x)   (*(uint64_t *)((ub1 *)(mm) + ((x) & ((RANDSIZ-1)<<3))))
#define	rngstep(mix, a, b, mm, m, m2, r, x)
#define	mix(a, b, c, d, e, f, g, h)
#define	shuffle(a, b, mm, m, m2, r, x)

Functions
void	isaac64Seed (char *seed, Rand64Context *ctx)
void	isaac64Init (bool hasSeed, Rand64Context *ctx)
void	isaac64Random (Rand64Context *ctx)
uint64_t	rand64Int (Rand64Context *ctx)
void	rand64Bytes (Rand64Context *ctx, uint8_t *buf, int count)

Macro Definition Documentation

ind

#define ind	(		mm,
			x
	)		(*(uint64_t *)((ub1 *)(mm) + ((x) & ((RANDSIZ-1)<<3))))

mix

#define mix	(		a,
			b,
			c,
			d,
			e,
			f,
			g,
			h
	)

Value:

{ \
   a-=e; f^=h>>9;  h+=a; \
   b-=f; g^=a<<9;  a+=b; \
   c-=g; h^=b>>23; b+=c; \
   d-=h; a^=c<<15; c+=d; \
   e-=a; b^=d>>14; d+=e; \
   f-=b; c^=e<<20; e+=f; \
   g-=c; d^=f>>17; f+=g; \
   h-=d; e^=g<<14; g+=h; \
}

rngstep

#define rngstep	(		mix,
			a,
			b,
			mm,
			m,
			m2,
			r,
			x
	)

Value:

{ \
  (x) = *(m);  \
  (a) = (mix) + *((m2)++); \
  *((m)++) = y = ind(mm,x) + (a) + (b); \
  *((r)++) = b = ind(mm,y>>RANDSIZL) + (x); \
}

shuffle

#define shuffle	(		a,
			b,
			mm,
			m,
			m2,
			r,
			x
	)

Value:

{ \
    rngstep(~((a) ^ ((a) << 21)), a, b, mm, m, m2, r, x); \
    rngstep(  (a) ^ ((a) >> 5),   a, b, mm, m, m2, r, x); \
    rngstep(  (a) ^ ((a) << 12),  a, b, mm, m, m2, r, x); \
    rngstep(  (a) ^ ((a) >> 33),  a, b, mm, m, m2, r, x); \
}

Function Documentation

isaac64Init()

void isaac64Init	(	bool	hasSeed,
		Rand64Context *	ctx
	)

isaac64Random()

void isaac64Random

(

Rand64Context *

ctx

)

isaac64Seed()

void isaac64Seed	(	char *	seed,
		Rand64Context *	ctx
	)

rand64Bytes()

void rand64Bytes	(	Rand64Context *	ctx,
		uint8_t *	buf,
		int	count
	)

rand64Int()

uint64_t rand64Int

(

Rand64Context *

ctx

)