From e98d15d4eb88ec13a6e6ef97e915aada231855fa Mon Sep 17 00:00:00 2001
From: Lars-Dominik Braun <lars@6xq.net>
Date: Mon, 9 Feb 2015 18:04:22 +0100
Subject: Replace isaac with xorshift

No difference in performance. rdrand instruction alone is too slow.
---
 isaac.h | 56 --------------------------------------------------------
 1 file changed, 56 deletions(-)
 delete mode 100644 isaac.h

(limited to 'isaac.h')

diff --git a/isaac.h b/isaac.h
deleted file mode 100644
index 6554569..0000000
--- a/isaac.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
-------------------------------------------------------------------------------
-isaac.h: definitions for a random number generator
-MODIFIED:
-  960327: Creation (addition of randinit, really)
-  970719: use context, not global variables, for internal state
-  980324: renamed seed to flag
-  980605: recommend RANDSIZL=4 for noncryptography.
-  991209: modified for inclusion with GNU Backgammon by Gary Wong
-  070121: modified for inclusion with flam3 by Erik Reckase
-------------------------------------------------------------------------------
-*/
-
-#include "isaacs.h"
-
-#ifndef _ISAAC_H_
-#define _ISAAC_H_
-
-#define RANDSIZL   (4)  /* I recommend 8 for crypto, 4 for simulations */
-#define RANDSIZ    (1<<RANDSIZL)
-
-/* context of random number generator */
-struct randctx
-{
-  ub4 randcnt;
-  ub4 randrsl[RANDSIZ];
-  ub4 randmem[RANDSIZ];
-  ub4 randa;
-  ub4 randb;
-  ub4 randc;
-};
-typedef  struct randctx  randctx;
-
-/*
-------------------------------------------------------------------------------
- If (flag==TRUE), then use the contents of randrsl[0..RANDSIZ-1] as the seed.
-------------------------------------------------------------------------------
-*/
-void irandinit( randctx *r, word flag );
-
-void isaac( randctx *r );
-
-
-/*
-------------------------------------------------------------------------------
- Call irand(/o_ randctx *r _o/) to retrieve a single 32-bit random value
-------------------------------------------------------------------------------
-*/
-#define irand(r) \
-   (!(r)->randcnt-- ? \
-     (isaac(r), (r)->randcnt=RANDSIZ-1, (r)->randrsl[(r)->randcnt]) : \
-     (r)->randrsl[(r)->randcnt])
-
-#endif
-
-
-- 
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