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Re: what is the "VPU" (in igen/cgen/sim) ?
- From: Doug Evans <dje at google dot com>
- To: gdb <gdb at sourceware dot org>, bje at gnu dot org, nick clifton <nickc at redhat dot com>
- Date: Tue, 23 Jun 2015 15:01:34 -0500
- Subject: Re: what is the "VPU" (in igen/cgen/sim) ?
- Authentication-results: sourceware.org; auth=none
- References: <20150623195531 dot GJ17734 at vapier>
On Tue, Jun 23, 2015 at 2:55 PM, Mike Frysinger <vapier@gentoo.org> wrote:
> the simulator had VPU tracing support proposed here:
> https://sourceware.org/ml/gdb/2001-02/msg00267.html
>
> and committed here:
> https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=01816cd804ec526927f53f0e408dae8c6ea269f2
>
> but nowhere can i seem to find a description of what the "VPU" actually is.
> the references to cgen doesn't lead anywhere as a grep of the cgen tree doesn't
> match anything. the only user in the sim tree is msp430, and it uses it for
> generic cpu register tracing. i would guess that it means "video processing
> unit" as Google would lead me to believe, but that doesn't make sense in the
> cgen/sim context. same for "virtual processing unit".
>
> can anyone shed some light on this ?
> -mike
Hi.
I can't, except to say the term "vpu" doesn't exist in the cgen world.
I think Ben is your best here.