[Patch,microblaze]: Optimized usage of fint instruction.
Michael Eager
eager@eagerm.com
Tue May 5 01:09:00 GMT 2015
On 03/04/2015 08:20 AM, Michael Eager wrote:
> On 03/04/15 03:53, Ajit Kumar Agarwal wrote:
>>
>>
>> -----Original Message-----
>> From: Michael Eager [mailto:eager@eagerm.com]
>> Sent: Thursday, February 26, 2015 4:33 AM
>> To: Ajit Kumar Agarwal; GCC Patches
>> Cc: Vinod Kathail; Shail Aditya Gupta; Vidhumouli Hunsigida; Nagaraju Mekala
>> Subject: Re: [Patch,microblaze]: Optimized usage of fint instruction.
>>
>> On 02/25/15 02:20, Ajit Kumar Agarwal wrote:
>>> Hello All:
>>>
>>> Please find the patch for the optimized usage of fint instruction
>>> changes. No regression is seen in the deja GNU tests.
>>>
>>> commit ed4dc0b96bf43c200cacad97f73a98ab7048e51b
>>> Author: Ajit Kumar Agarwal <ajitkum@xhdspdgnu.(none)>
>>> Date: Wed Feb 25 15:36:29 2015 +0530
>>>
>>> [Patch,microblaze]: Optimized usage of fint instruction.
>>>
>>> The changes are made in the patch for optimized usage of fint instruction.
>>> The sequence of fint/cond_branch is replaced with fcmp/cond_branch. The
>>> fint instruction takes 6/7 cycles as compared to fcmp instruction which
>>> takes 1 cycles. The conversion from float to int with fint instruction
>>> is not required and can directly compared with fcmp instruction which
>>> takes 1 cycle as compared to 6/7 cycles with fint instruction.
>>>
>>> ChangeLog:
>>> 2015-02-25 Ajit Agarwal <ajitkum@xilinx.com>
>>>
>>> * config/microblaze/microblaze.md (peephole2): New.
>>
>>>
>> + emit_insn (gen_cstoresf4 (comp_reg, operands[2],
>> + gen_rtx_REG(SFmode,REGNO(cmp_op0)),
>> + gen_rtx_REG(SFmode,REGNO(cmp_op1))));
>>
>>>> Spaces before left parens and after comma in last two lines.
>>
>> Changes are incorporated. Please find the log for updated patch.
>>
>> commit 492b0d0b67a5b12d2dc239de3215630c8838edea
>> Author: Ajit Kumar Agarwal <ajitkum@xhdspdgnu.(none)>
>> Date: Wed Mar 4 17:15:16 2015 +0530
>>
>> [Patch,microblaze]: Optimized usage of fint instruction.
>>
>> The changes are made in the patch for optimized usage of fint instruction.
>> The sequence of fint/cond_branch is replaced with fcmp/cond_branch. The
>> fint instruction takes 6/7 cycles as compared to fcmp instruction which
>> takes 1 cycles. The conversion from float to int with fint instruction
>> is not required and can directly compared with fcmp instruction which
>> takes 1 cycle as compared to 6/7 cycles with fint instruction.
>>
>> ChangeLog:
>> 2015-03-04 Ajit Agarwal <ajitkum@xilinx.com>
>>
>> * config/microblaze/microblaze.md (peephole2): New.
>>
>> Signed-off-by:Ajit Agarwal ajitkum@xilinx.com
>>
>> Thanks & Regards
>> Ajit
>
> OK.
Committed revision 222790.
--
Michael Eager eager@eagercon.com
1960 Park Blvd., Palo Alto, CA 94306 650-325-8077
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