Path: utzoo!mnetor!uunet!husc6!bbn!schooler@oak.bbn.com
From: schooler@oak.bbn.com (Richard Schooler)
Newsgroups: comp.arch
Subject: Re: Type Conversions - (Was: Bad RISC)
Message-ID: <22372@bbn.COM>
Date: 21 Mar 88 16:30:19 GMT
References: <2035@ho95e.ATT.COM> <753@esunix.UUCP>
Sender: news@bbn.COM
Reply-To: schooler@oak.bbn.com (Richard Schooler)
Organization: BBN Advanced Computers, Inc.
Lines: 13
In-reply-to: sedwards@esunix.UUCP (Scott Edwards)


In article <753@esunix.UUCP>, sedwards@esunix (Scott Edwards) writes:
>Since you brought this up, I've recently discovered that in the ANSI draft
>that prototypes override the implicit type conversions, as in float will
>not be promoted to double if the prototype declares it to be float.  Does
>this mean that char would not be promoted to int?  If so what would that
>to machines that have alignment restrictions and parameters are passed on
>the stack?  Just curious.

Many machines now have 32-bit wide stacks.  Pushing an eight-bit
quantity is possible, but advances the stack pointer by four (on a
byte-addressable machine).  The eight-bit quantity isn't promoted, but
merely padded.
		-- Richard Schooler