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Message-ID: <20140921161244.GX21835@port70.net>
Date: Sun, 21 Sep 2014 18:12:45 +0200
From: Szabolcs Nagy <nsz@...t70.net>
To: musl@...ts.openwall.com
Subject: Re: [PATCH] fix a bug in the rand48 family of prng
* Alexander Monakov <amonakov@...ras.ru> [2014-09-21 20:01:08 +0400]:
> unsigned short a[3];
> long long foo()
> {
> return a[0] | a[1] << 16 | a[2]+0ull<<32;
> }
> long long bar()
> {
> return a[0] | a[1]+0u << 16 | a[2]+0ull<<32;
> }
ah yes signextension explains the problem
btw original mail said:
> printf("%ld %ld %ld\n", lrand48(), lrand48(), lrand48());
> ...
> I expected to get the same sequence because...
the arg evaluation order is unspecified so
one should expect the same numbers but not
in the same order for this test
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