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* [PATCH][aarch64] Use neoversen1 tuning struct for -mcpu=cortex-a76
@ 2019-07-30 17:08 Kyrill Tkachov
  2019-08-12 18:48 ` James Greenhalgh
  0 siblings, 1 reply; 2+ messages in thread
From: Kyrill Tkachov @ 2019-07-30 17:08 UTC (permalink / raw)
  To: gcc-patches; +Cc: Richard Earnshaw, Marcus Shawcroft, James Greenhalgh

[-- Attachment #1: Type: text/plain, Size: 491 bytes --]

Hi all,

The neoversen1 tuning struct gives better performance on the Cortex-A76, 
so use that.
The only difference from the current tuning is the function and label 
alignment settings.

This gives about 1.3% improvement on SPEC2006 int and 0.3% on SPEC2006 fp.

Tested on aarch64-none-elf.

Ok for trunk?
Thanks,
Kyrill

2019-07-31  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

     * config/aarch64/aarch64-cores.def (cortex-a76): Use neoversen1 tuning
     struct.


[-- Attachment #2: a76-tuning.patch --]
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diff --git a/gcc/config/aarch64/aarch64-cores.def b/gcc/config/aarch64/aarch64-cores.def
index 82d91d62519f0476e059718d8c2f02e3ea5a0613..bd257aeb34e7948caf729e5a684ddd9ceba457a4 100644
--- a/gcc/config/aarch64/aarch64-cores.def
+++ b/gcc/config/aarch64/aarch64-cores.def
@@ -99,7 +99,7 @@ AARCH64_CORE("thunderx2t99",  thunderx2t99,  thunderx2t99, 8_1A,  AARCH64_FL_FOR
 /* ARM ('A') cores. */
 AARCH64_CORE("cortex-a55",  cortexa55, cortexa53, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_F16 | AARCH64_FL_RCPC | AARCH64_FL_DOTPROD, cortexa53, 0x41, 0xd05, -1)
 AARCH64_CORE("cortex-a75",  cortexa75, cortexa57, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_F16 | AARCH64_FL_RCPC | AARCH64_FL_DOTPROD, cortexa73, 0x41, 0xd0a, -1)
-AARCH64_CORE("cortex-a76",  cortexa76, cortexa57, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_F16 | AARCH64_FL_RCPC | AARCH64_FL_DOTPROD, cortexa72, 0x41, 0xd0b, -1)
+AARCH64_CORE("cortex-a76",  cortexa76, cortexa57, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_F16 | AARCH64_FL_RCPC | AARCH64_FL_DOTPROD, neoversen1, 0x41, 0xd0b, -1)
 AARCH64_CORE("ares",  ares, cortexa57, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_F16 | AARCH64_FL_RCPC | AARCH64_FL_DOTPROD | AARCH64_FL_PROFILE, neoversen1, 0x41, 0xd0c, -1)
 AARCH64_CORE("neoverse-n1",  neoversen1, cortexa57, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_F16 | AARCH64_FL_RCPC | AARCH64_FL_DOTPROD | AARCH64_FL_PROFILE, neoversen1, 0x41, 0xd0c, -1)
 AARCH64_CORE("neoverse-e1",  neoversee1, cortexa53, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_F16 | AARCH64_FL_RCPC | AARCH64_FL_DOTPROD | AARCH64_FL_SSBS, cortexa53, 0x41, 0xd4a, -1)

^ permalink raw reply	[flat|nested] 2+ messages in thread
* Re: [PATCH][aarch64] Use neoversen1 tuning struct for -mcpu=cortex-a76
  2019-07-30 17:08 [PATCH][aarch64] Use neoversen1 tuning struct for -mcpu=cortex-a76 Kyrill Tkachov
@ 2019-08-12 18:48 ` James Greenhalgh
  0 siblings, 0 replies; 2+ messages in thread
From: James Greenhalgh @ 2019-08-12 18:48 UTC (permalink / raw)
  To: Kyrill Tkachov; +Cc: gcc-patches, Richard Earnshaw, Marcus Shawcroft, nd

On Tue, Jul 30, 2019 at 05:59:15PM +0100, Kyrill Tkachov wrote:
> Hi all,
> 
> The neoversen1 tuning struct gives better performance on the Cortex-A76, 
> so use that.
> The only difference from the current tuning is the function and label 
> alignment settings.
> 
> This gives about 1.3% improvement on SPEC2006 int and 0.3% on SPEC2006 fp.
> 
> Tested on aarch64-none-elf.
> 
> Ok for trunk?

OK.

Thanks,
James

> Thanks,
> Kyrill
> 
> 2019-07-31  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
> 
>      * config/aarch64/aarch64-cores.def (cortex-a76): Use neoversen1 tuning
>      struct.
> 

^ permalink raw reply	[flat|nested] 2+ messages in thread
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