2011/10/11 Georg-Johann Lay :
> This is a small addendum to PR50447.
>
> It's a change to addsi3 insn; the actual insn sequence printed is still the
> same (except for adding +/-1 to l-reg) but the effect on cc0 is worked out so
> that it can be used to cancel out comparisons like in long loops.
>
On 09/23/2011 02:10 AM, Paolo Bonzini wrote:
> On 09/23/2011 10:56 AM, Paolo Bonzini wrote:
>> Also, I am curious about one thing: while this is of course a very
>> pragmatic solution, you could also convert AVR to get rid of CC0, do
>> this at expansion time, and get split-wide-types to work as in
2011/9/23 Georg-Johann Lay :
> This is the compare part to fix PR50447.
>
> Just like the preceding changes to fix PR50447 it's a micro-optimization to
> smarter print-out of instructions.
>
> The patch covers comparisons against HI and SI integers.
>
> The byte-wide comparison allows reusing the v
On 09/23/2011 11:36 AM, Georg-Johann Lay wrote:
Paolo Bonzini schrieb:
On 09/23/2011 10:56 AM, Paolo Bonzini wrote:
Also, I am curious about one thing: while this is of course a very
pragmatic solution, you could also convert AVR to get rid of CC0, do
this at expansion time, and get split-wide-
Paolo Bonzini schrieb:
> On 09/23/2011 10:56 AM, Paolo Bonzini wrote:
>> Also, I am curious about one thing: while this is of course a very
>> pragmatic solution, you could also convert AVR to get rid of CC0, do
>> this at expansion time, and get split-wide-types to work as intended.
My changes ar
On 09/23/2011 10:56 AM, Paolo Bonzini wrote:
Also, I am curious about one thing: while this is of course a very
pragmatic solution, you could also convert AVR to get rid of CC0, do
this at expansion time, and get split-wide-types to work as intended.
compare-elim.c makes it relatively easy to re
On 09/23/2011 10:41 AM, Georg-Johann Lay wrote:
Yes, can be done for comparisons, too. I'd prefer a separate patch for it. The
subject is bit misleading; should be (2/n).
Also, I am curious about one thing: while this is of course a very
pragmatic solution, you could also convert AVR to get r
Paolo Bonzini schrieb:
> On 09/22/2011 07:43 PM, Georg-Johann Lay wrote:
>> This patch adds the PLUS part to fix the PR.
>>
>> addsi3 has a 8-bit scratch register now so that constants that are not
>> covered
>> by the constraints won't force a reload of the constant.
>>
>> The output routine tries
Denis Chertykov schrieb:
> 2011/9/22 Georg-Johann Lay :
>> This patch adds the PLUS part to fix the PR.
>>
>> addsi3 has a 8-bit scratch register now so that constants that are not
>> covered
>> by the constraints won't force a reload of the constant.
>>
>> The output routine tries adding the cons
On 09/22/2011 07:43 PM, Georg-Johann Lay wrote:
This patch adds the PLUS part to fix the PR.
addsi3 has a 8-bit scratch register now so that constants that are not covered
by the constraints won't force a reload of the constant.
The output routine tries adding the constant and subtracting the n
2011/9/22 Georg-Johann Lay :
> This patch adds the PLUS part to fix the PR.
>
> addsi3 has a 8-bit scratch register now so that constants that are not covered
> by the constraints won't force a reload of the constant.
>
> The output routine tries adding the constant and subtracting the negated
> co
2011/9/21 Georg-Johann Lay :
> This patch improves IOR, XOR, AND for HI and SI.
>
> There is room for improvement in the current implementation:
>
> - better analysis if a scratch is actually needed
> - add clobber operands to some insns
> - use 8-bit scratch instead of reload the constant
> - reus
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