From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Korsgaard Date: Sun, 11 Dec 2016 16:52:19 +0100 Subject: [Buildroot] [PATCH 4/4] jpeg-turbo: add simd support for aarch64 In-Reply-To: <20161211155219.22814-1-peter@korsgaard.com> References: <20161211155219.22814-1-peter@korsgaard.com> Message-ID: <20161211155219.22814-4-peter@korsgaard.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net >From the 1.5-b1 release notes: Added ARM 64-bit (ARMv8) NEON SIMD implementations of the commonly-used compression algorithms (including the slow integer forward DCT and h2v2 & h2v1 downsampling algorithms, which are not accelerated in the 32-bit NEON implementation.) This speeds up the compression of full-color JPEGs by about 75% on average on a Cavium ThunderX processor and by about 2-2.5x on average on Cortex-A53 and Cortex-A57 cores. Add it unconditionally for all aarch64 cores, as neon support is required for all "standard" ARMv8 implementations. If an ARMv8 implementation w/o NEON ever shows up, then we will need to add a BR2_AARCH64_CPU_HAS_NEON and handle it like ARM. Signed-off-by: Peter Korsgaard --- package/jpeg/Config.in | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/package/jpeg/Config.in b/package/jpeg/Config.in index 926f12e..9bf9712 100644 --- a/package/jpeg/Config.in +++ b/package/jpeg/Config.in @@ -7,7 +7,9 @@ config BR2_PACKAGE_JPEG config BR2_PACKAGE_JPEG_SIMD_SUPPORT bool default y if BR2_X86_CPU_HAS_MMX || BR2_ARM_CPU_HAS_NEON || \ - BR2_POWERPC_CPU_HAS_ALTIVEC + BR2_POWERPC_CPU_HAS_ALTIVEC || \ + BR2_aarch64 || BR2_aarch64_be + if BR2_PACKAGE_JPEG -- 2.10.2