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Re: [Qemu-devel] mulu2 not implemented for tcg target sparc

From: Richard Henderson
Subject: Re: [Qemu-devel] mulu2 not implemented for tcg target sparc
Date: Mon, 11 Jan 2010 08:48:10 -0800
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20091209 Fedora/3.0-4.fc12 Thunderbird/3.0

On 01/10/2010 01:17 PM, Palle Lyckegaard wrote:
On Sun, 10 Jan 2010, Blue Swirl wrote:

Is it needed somewhere?

I was trying to run qemu-system-mips with a NetBSD malta kernel that
generates a MIPS mult operation. Tracing the code through tcg points at
a missing mulu2 opreration for sparc.

 >> It will be generated for instance for some muls when the target >>
is i386 (not even x86_64) on a 32-bit host.

In that case mulu2 support would be useful for Sparc32 host too.
Palle, are you planning to dig into this?

Yes I will try even if my tcg and SPARC assembly skills and very limited
(so far...)

Try this.  You're also missing double-word addition and subtraction.


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