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Path: utzoo!linus!decvax!tektronix!hplabs!hpda!fortune!wdl1!jbn
From: jbn@wdl1.UUCP
Newsgroups: net.micro.68k
Subject: Optimizing M68000 C compilers?
Message-ID: <427@wdl1.UUCP>
Date: Fri, 17-May-85 01:23:21 EDT
Article-I.D.: wdl1.427
Posted: Fri May 17 01:23:21 1985
Date-Received: Sun, 19-May-85 06:06:09 EDT
Sender: notes@wdl1.UUCP
Organization: Ford Aerospace, Western Development Laboratories
Lines: 26
Nf-ID: #N:wdl1:22700012:000:503
Nf-From: wdl1!jbn    May 16 20:51:00 1985


      Is there a really strong C compiler for the 68K?  Try this on
yours?

	lcopy(src,dest,n)
	long src[];
	long dest[];
	long n;
	{	while (n--) *dest++ = *src++;	}

Is the inner loop two instructions long, and suitable for repeat mode?
If so, then try this one.

	lcopy(src,dest,n)
	long src[];
	long dest[];
	long n;
	{
		for (i=0; i<n; i++) dest[i] = src[i];
	}

Is the inner loop two instructions long, and suitable for repeat mode?
If so, please post.  That's a non-toy compiler.

					John Nagle