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RE: [PATCH v4][aarch64] Implemented reciprocal square root (rsqrt) estimation in -ffast-math
- From: Evandro Menezes <e dot menezes at samsung dot com>
- To: 'Benedikt Huber' <benedikt dot huber at theobroma-systems dot com>, gcc-patches at gcc dot gnu dot org
- Cc: philipp dot tomsich at theobroma-systems dot com, Venkataramanan dot Kumar at amd dot com, pinskia at gmail dot com, kyrylo dot tkachov at arm dot com
- Date: Fri, 31 Jul 2015 18:00:08 -0500
- Subject: RE: [PATCH v4][aarch64] Implemented reciprocal square root (rsqrt) estimation in -ffast-math
- Authentication-results: sourceware.org; auth=none
- References: <1438362335-48036-1-git-send-email-benedikt dot huber at theobroma-systems dot com>
Hi, Benedikt.
It looks pretty good. I'd just hesitate to go about defining which cores
benefit from this by default, IIUC.
Cheers,
--
Evandro Menezes Austin, TX
> -----Original Message-----
> From: gcc-patches-owner@gcc.gnu.org [mailto:gcc-patches-owner@gcc.gnu.org]
On
> Behalf Of Benedikt Huber
> Sent: Friday, July 31, 2015 12:06
> To: gcc-patches@gcc.gnu.org
> Cc: philipp.tomsich@theobroma-systems.com; Venkataramanan.Kumar@amd.com;
> pinskia@gmail.com; e.menezes@samsung.com; kyrylo.tkachov@arm.com; Benedikt
> Huber
> Subject: [PATCH v4][aarch64] Implemented reciprocal square root (rsqrt)
> estimation in -ffast-math
>
> This fourth revision of the patch:
> * fixes an error in the docs.
> * uses gen_rsqrt* functions.
> * uses extra_tuning_flags.
>
> Ok for check in.
>
> Benedikt Huber (1):
> 2015-07-31 Benedikt Huber <benedikt.huber@theobroma-systems.com>
> Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
>
> gcc/ChangeLog | 21 ++++
> gcc/config/aarch64/aarch64-builtins.c | 104
> ++++++++++++++++++++
> gcc/config/aarch64/aarch64-opts.h | 7 ++
> gcc/config/aarch64/aarch64-protos.h | 2 +
> gcc/config/aarch64/aarch64-simd.md | 27 ++++++
> gcc/config/aarch64/aarch64-tuning-flags.def | 1 +
> gcc/config/aarch64/aarch64.c | 106
> +++++++++++++++++++-
> gcc/config/aarch64/aarch64.md | 3 +
> gcc/config/aarch64/aarch64.opt | 8 ++
> gcc/doc/invoke.texi | 19 ++++
> gcc/testsuite/gcc.target/aarch64/rsqrt-asm-check.c | 63 ++++++++++++
> gcc/testsuite/gcc.target/aarch64/rsqrt.c | 107
> +++++++++++++++++++++
> 12 files changed, 463 insertions(+), 5 deletions(-) create mode 100644
> gcc/testsuite/gcc.target/aarch64/rsqrt-asm-check.c
> create mode 100644 gcc/testsuite/gcc.target/aarch64/rsqrt.c
>
> --
> 1.9.1