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jpeg-turbo: add simd support for aarch64

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>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 <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Peter Korsgaard 2016-12-11 16:52:19 +01:00 committed by Thomas Petazzoni
parent 3031af7ea7
commit 643a21b326
1 changed files with 1 additions and 0 deletions
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1
package/jpeg/Config.in
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@ -8,6 +8,7 @@ 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_aarch64 || BR2_aarch64_be
if BR2_PACKAGE_JPEG