Newsgroups: comp.arch
Path: utzoo!henry
From: henry@utzoo.uucp (Henry Spencer)
Subject: Re: Unaligned data and old FORTRAN
Message-ID: <1989Apr9.031604.7015@utzoo.uucp>
Organization: U of Toronto Zoology
References: <13998@sequent.UUCP> <747@key.COM> <1405@auspex.auspex.com>
Date: Sun, 9 Apr 89 03:16:04 GMT

In article <1405@auspex.auspex.com> guy@auspex.auspex.com (Guy Harris) writes:
>>Fortunately for current RISCs, the only legal kind of misalignment in Fortran
>>77 puts a doubleword on a singleword boundary, and processors with 32-bit
>>busses tend not to notice that.
>
>SPARC notices it, though.  (Was this put into the architecture for the
>benefit of potential future implementations with 64-bit buses?)

Possibly, but it has the more immediate benefit that a 64-bit operand
(like smaller ones) cannot straddle a page boundary.
-- 
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