From 9a85b75fc414653f4a691ea57b83722489cd3d61 Mon Sep 17 00:00:00 2001 From: James Greenhalgh Date: Wed, 21 Jun 2017 09:58:57 +0000 Subject: [PATCH] [Patch AArch64] Add initial tuning support for Cortex-A55 and Cortex-A75 This patch adds support for the ARM Cortex-A75 and Cortex-A55 processors through the -mcpu/-mtune values cortex-a55 and cortex-a75, and an ARM DynamIQ big.LITTLE configuration of these two processors through the -mcpu/-mtune value cortex-a75.cortex-a55 The ARM Cortex-A75 is ARM's latest and highest performance applications processor. For the initial tuning provided in this patch, I have chosen to share the tuning structure with its predecessor, the Cortex-A73. The ARM Cortex-A55 delivers the best combination of power efficiency and performance in its class. For the initial tuning provided in this patch, I have chosen to share the tuning structure with its predecessor, the Cortex-A53. Both Cortex-A55 and Cortex-A75 support ARMv8-A with the ARM8.1-A and ARMv8.2-A extensions, along with the cryptography extension, and the RCPC extensions from ARMv8.3-A. This is reflected in the patch, -mcpu=cortex-a75 is treated as equivalent to passing -mtune=cortex-a75 -march=armv8.2-a+rcpc . 2017-06-21 James Greenhalgh * config/aarch64/aarch64-cores.def (cortex-a55): New. (cortex-a75): Likewise. (cortex-a75.cortex-a55): Likewise. * config/aarch64/aarch64-tune.md: Regenerate. * doc/invoke.texi (-mtune): Document new values for -mtune. From-SVN: r249441 --- gcc/ChangeLog | 8 ++++++++ gcc/config/aarch64/aarch64-cores.def | 10 ++++++++++ gcc/config/aarch64/aarch64-tune.md | 2 +- gcc/doc/invoke.texi | 14 ++++++++------ 4 files changed, 27 insertions(+), 7 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 199a01fc6e2..e08150c612c 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,11 @@ +2017-06-21 James Greenhalgh + + * config/aarch64/aarch64-cores.def (cortex-a55): New. + (cortex-a75): Likewise. + (cortex-a75.cortex-a55): Likewise. + * config/aarch64/aarch64-tune.md: Regenerate. + * doc/invoke.texi (-mtune): Document new values for -mtune. + 2017-06-21 Tom de Vries * doc/sourcebuild.texi (Add Options, Features for dg-add-options): Add diff --git a/gcc/config/aarch64/aarch64-cores.def b/gcc/config/aarch64/aarch64-cores.def index e333d5fc5a0..0baa20ce8f5 100644 --- a/gcc/config/aarch64/aarch64-cores.def +++ b/gcc/config/aarch64/aarch64-cores.def @@ -80,6 +80,12 @@ AARCH64_CORE("vulcan", vulcan, thunderx2t99, 8_1A, AARCH64_FL_FOR_ARCH8_1 | AA /* Cavium ('C') cores. */ AARCH64_CORE("thunderx2t99", thunderx2t99, thunderx2t99, 8_1A, AARCH64_FL_FOR_ARCH8_1 | AARCH64_FL_CRYPTO, thunderx2t99, 0x43, 0x0af, -1) +/* ARMv8.2-A Architecture Processors. */ + +/* ARM ('A') cores. */ +AARCH64_CORE("cortex-a55", cortexa55, cortexa53, 8_2A, AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_RCPC, cortexa53, 0x41, 0xd05, -1) +AARCH64_CORE("cortex-a75", cortexa75, cortexa57, 8_2A, AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_RCPC, cortexa73, 0x41, 0xd0a, -1) + /* ARMv8-A big.LITTLE implementations. */ AARCH64_CORE("cortex-a57.cortex-a53", cortexa57cortexa53, cortexa53, 8A, AARCH64_FL_FOR_ARCH8 | AARCH64_FL_CRC, cortexa57, 0x41, AARCH64_BIG_LITTLE (0xd07, 0xd03), -1) @@ -87,4 +93,8 @@ AARCH64_CORE("cortex-a72.cortex-a53", cortexa72cortexa53, cortexa53, 8A, AARCH AARCH64_CORE("cortex-a73.cortex-a35", cortexa73cortexa35, cortexa53, 8A, AARCH64_FL_FOR_ARCH8 | AARCH64_FL_CRC, cortexa73, 0x41, AARCH64_BIG_LITTLE (0xd09, 0xd04), -1) AARCH64_CORE("cortex-a73.cortex-a53", cortexa73cortexa53, cortexa53, 8A, AARCH64_FL_FOR_ARCH8 | AARCH64_FL_CRC, cortexa73, 0x41, AARCH64_BIG_LITTLE (0xd09, 0xd03), -1) +/* ARM DynamIQ big.LITTLE configurations. */ + +AARCH64_CORE("cortex-a75.cortex-a55", cortexa75cortexa55, cortexa53, 8_2A, AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_RCPC, cortexa73, 0x41, AARCH64_BIG_LITTLE (0xd0a, 0xd05), -1) + #undef AARCH64_CORE diff --git a/gcc/config/aarch64/aarch64-tune.md b/gcc/config/aarch64/aarch64-tune.md index 4209f677935..7fcd6cb2c2e 100644 --- a/gcc/config/aarch64/aarch64-tune.md +++ b/gcc/config/aarch64/aarch64-tune.md @@ -1,5 +1,5 @@ ;; -*- buffer-read-only: t -*- ;; Generated automatically by gentune.sh from aarch64-cores.def (define_attr "tune" - "cortexa35,cortexa53,cortexa57,cortexa72,cortexa73,thunderx,thunderxt88p1,thunderxt88,thunderxt81,thunderxt83,xgene1,falkor,qdf24xx,exynosm1,thunderx2t99p1,vulcan,thunderx2t99,cortexa57cortexa53,cortexa72cortexa53,cortexa73cortexa35,cortexa73cortexa53" + "cortexa35,cortexa53,cortexa57,cortexa72,cortexa73,thunderx,thunderxt88p1,thunderxt88,thunderxt81,thunderxt83,xgene1,falkor,qdf24xx,exynosm1,thunderx2t99p1,vulcan,thunderx2t99,cortexa55,cortexa75,cortexa57cortexa53,cortexa72cortexa53,cortexa73cortexa35,cortexa73cortexa53,cortexa75cortexa55" (const (symbol_ref "((enum attr_tune) aarch64_tune)"))) diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 86c8d62622d..7e7a16a5cb6 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -14077,17 +14077,19 @@ processors implementing the target architecture. @opindex mtune Specify the name of the target processor for which GCC should tune the performance of the code. Permissible values for this option are: -@samp{generic}, @samp{cortex-a35}, @samp{cortex-a53}, @samp{cortex-a57}, -@samp{cortex-a72}, @samp{cortex-a73}, @samp{exynos-m1}, -@samp{xgene1}, @samp{vulcan}, @samp{thunderx}, +@samp{generic}, @samp{cortex-a35}, @samp{cortex-a53}, @samp{cortex-a55}, +@samp{cortex-a57}, @samp{cortex-a72}, @samp{cortex-a73}, @samp{cortex-a75}, +@samp{exynos-m1}, @samp{xgene1}, @samp{vulcan}, @samp{thunderx}, @samp{thunderxt88}, @samp{thunderxt88p1}, @samp{thunderxt81}, @samp{thunderxt83}, @samp{thunderx2t99}, @samp{cortex-a57.cortex-a53}, @samp{cortex-a72.cortex-a53}, @samp{cortex-a73.cortex-a35}, -@samp{cortex-a73.cortex-a53}, @samp{native}. +@samp{cortex-a73.cortex-a53}, @samp{cortex-a75.cortex-a55}, +@samp{native}. The values @samp{cortex-a57.cortex-a53}, @samp{cortex-a72.cortex-a53}, -@samp{cortex-a73.cortex-a35}, @samp{cortex-a73.cortex-a53} -specify that GCC should tune for a big.LITTLE system. +@samp{cortex-a73.cortex-a35}, @samp{cortex-a73.cortex-a53}, +@samp{cortex-a75.cortex-a55} specify that GCC should tune for a +big.LITTLE system. Additionally on native AArch64 GNU/Linux systems the value @samp{native} tunes performance to the host system. This option has no effect -- 2.30.2