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Re: simulation; vliw targets; writeback tracking bitstring overflow

To: Ben Elliston <bje at redhat dot com>
Subject: Re: simulation; vliw targets; writeback tracking bitstring overflow
From: "Frank Ch. Eigler" <fche at redhat dot com>
Date: Sun, 28 Jan 2001 23:04:42 -0500
Cc: cgen at sources dot redhat dot com
References: <20010125173953.B915@redhat.com> <Pine.LNX.4.31.0101291324390.23345-100000@moshpit.cygnus.com>

Hi -

On Mon, Jan 29, 2001 at 01:25:40PM +1000, Ben Elliston wrote:
:    Anyway, this needs to get fixed.  A couple of alternatives are:
: 
:    - widening the bitfield to "unsigned long long"
:    - adopting a separate per-field indicator variable
:    - (since I'm interested in sid -> C++) adopting a std::bitset<N> type
: 
: What are the runtime memory requirements for moving to unsigned long long?

Effectively immeasurably small: an extra 4 bytes in an scache struct
and semantic function stack frame.  It's not really a big issue either
way.

- FChE

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References:
- simulation; vliw targets; writeback tracking bitstring overflow
  - From: Frank Ch. Eigler
- Re: simulation; vliw targets; writeback tracking bitstring overflow
  - From: Ben Elliston

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