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portability fix: when rotating, don't do shifts >= wordsize.

This commit is contained in:
sommerfeld 2000-06-10 17:01:15 +00:00
parent cb31de55ed
commit 8e8ecc1bb5
1 changed files with 5 additions and 4 deletions
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9
sys/dev/rndpool.c
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@ -1,4 +1,4 @@
/* $NetBSD: rndpool.c,v 1.9 2000/06/05 23:42:34 sommerfeld Exp $ */
/* $NetBSD: rndpool.c,v 1.10 2000/06/10 17:01:15 sommerfeld Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
@ -141,9 +141,10 @@ rndpool_add_one_word(rp, val)
val ^= rp->pool[(rp->cursor + TAP3) & (RND_POOLWORDS - 1)];
val ^= rp->pool[(rp->cursor + TAP4) & (RND_POOLWORDS - 1)];
val ^= rp->pool[(rp->cursor + TAP5) & (RND_POOLWORDS - 1)];
rp->pool[rp->cursor++] ^=
((val << rp->rotate) | (val >> (32 - rp->rotate)));
if (rp->rotate != 0)
val = ((val << rp->rotate) | (val >> (32 - rp->rotate)));
rp->pool[rp->cursor++] ^= val;
/*
* If we have looped around the pool, increment the rotate
* variable so the next value will get xored in rotated to