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Re: [PATC] MIPS16/GAS: Permit branch swapping with PC-relative insns

From: Richard Sandiford <rdsandiford at googlemail dot com>
To: "Maciej W. Rozycki" <macro at codesourcery dot com>
Cc: binutils at sourceware dot org, Chao-ying Fu <fu at mips dot com>, Rich Fuhler <rich at mips dot com>, David Lau <davidlau at mips dot com>, Kevin Mills <kevinm at mips dot com>, Ilie Garbacea <ilie at mips dot com>, Catherine Moore <clm at codesourcery dot com>, Nathan Sidwell <nathan at codesourcery dot com>, Joseph Myers <joseph at codesourcery dot com>
Date: Thu, 11 Aug 2011 16:32:48 +0100
Subject: Re: [PATC] MIPS16/GAS: Permit branch swapping with PC-relative insns
References: <alpine.DEB.1.10.1108022232130.4083@tp.orcam.me.uk> <87r54ypzp5.fsf@firetop.home> <alpine.DEB.1.10.1108080133510.4083@tp.orcam.me.uk> <m3bovwwfkq.fsf@richards-thinkpad.stglab.manchester.uk.ibm.com> <alpine.DEB.1.10.1108111513230.4083@tp.orcam.me.uk> <m3r54suher.fsf@richards-thinkpad.stglab.manchester.uk.ibm.com> <alpine.DEB.1.10.1108111604120.4083@tp.orcam.me.uk>

"Maciej W. Rozycki" <macro@codesourcery.com> writes:
> On Thu, 11 Aug 2011, Richard Sandiford wrote:
>
>> But that ADDIUPC can't be swapped.  The offset is negative, so you need
>> the extended rather than 2-byte instruction.
>
>  Fair enough, although this was just an ad-hoc illustration.

But you haven't provided a less ad-hoc example that (a) you think
is reasonable code and (b) would benefit from this patch.

Richard

References:
- [PATC] MIPS16/GAS: Permit branch swapping with PC-relative insns
  - From: Maciej W. Rozycki
- Re: [PATC] MIPS16/GAS: Permit branch swapping with PC-relative insns
  - From: Richard Sandiford
- Re: [PATC] MIPS16/GAS: Permit branch swapping with PC-relative insns
  - From: Maciej W. Rozycki
- Re: [PATC] MIPS16/GAS: Permit branch swapping with PC-relative insns
  - From: Richard Sandiford
- Re: [PATC] MIPS16/GAS: Permit branch swapping with PC-relative insns
  - From: Maciej W. Rozycki
- Re: [PATC] MIPS16/GAS: Permit branch swapping with PC-relative insns
  - From: Richard Sandiford
- Re: [PATC] MIPS16/GAS: Permit branch swapping with PC-relative insns
  - From: Maciej W. Rozycki

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