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jpeg-turbo: add simd support for powerpc cores with altivec

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>From the 1.5-b1 release notes:

Added full SIMD acceleration for PowerPC platforms using AltiVec VMX
(128-bit SIMD) instructions.  Although the performance of libjpeg-turbo on
PowerPC was already good, due to the increased number of registers available
to the compiler vs.  x86, it was still possible to speed up compression by
about 3-4x and decompression by about 2-2.5x (relative to libjpeg v6b)
through the use of AltiVec instructions.

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 16:52:18 +01:00 committed by Thomas Petazzoni
parent 6c5ff61a6a
commit 3031af7ea7
1 changed files with 2 additions and 1 deletions
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3
package/jpeg/Config.in
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@ -6,7 +6,8 @@ config BR2_PACKAGE_JPEG
# jpeg-turbo has simd support for some architectures
config BR2_PACKAGE_JPEG_SIMD_SUPPORT
bool
default y if BR2_X86_CPU_HAS_MMX || BR2_ARM_CPU_HAS_NEON
default y if BR2_X86_CPU_HAS_MMX || BR2_ARM_CPU_HAS_NEON || \
BR2_POWERPC_CPU_HAS_ALTIVEC
if BR2_PACKAGE_JPEG