Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ukma!husc6!rice!sun-spots-request
From: psanders@axion.british-telecom.co.uk (Paul Sanders)
Newsgroups: comp.sys.sun
Subject: Incompatability from OS3 to OS4 ??
Keywords: Software
Message-ID: <1463@zaphod.axion.bt.co.uk>
Date: 10 May 89 01:12:07 GMT
Sender: usenet@rice.edu
Organization: Sun-Spots
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Approved: Sun-Spots@rice.edu
Original-Date: 2 May 89 07:38:13 GMT
X-Sun-Spots-Digest: Volume 7, Issue 279, message 11 of 23

Does anybody know whether there is a difference in the way C programs
interface with assembly code from SUNOS3 and SUNOS4 ??

As part of a program I'm trying to install under SUN OS4 there is the
following assembly code in one of the C files. I don't know anything about
assembly language programming on the SUN but the code looks fairly
reasonable.

The program works under OS3 so I assume something must have changed/been
fixed in the upgrade.

Could anyone tell me whether things have changed and, even better, a fix
for the fragment ??

nat
add(r0, r1)
nat	r0, r1;
{

	asm ("movl	a6@(0x8), d0");
	asm ("addl	a6@(0xc), d0");
	asm ("bvc	LADD");
	asm ("movel	#~0, d0");
	asm ("LADD:");
}

nat
mul(r0, r1)
nat	r0, r1;
{

	asm ("movl	a6@(0x8), d0");
	asm ("mulul	a6@(0xc), d0");
	asm ("bvc	LMUL");
	asm ("movel	#~0, d0");
	asm ("LMUL:");
}

Thanks

Paul Sanders
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