package/xnnpack: new package

This package is required by tensorflow-lite.

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

DEVELOPERS

@@ -3039,6 +3039,7 @@ F:	package/gemmlowp/
 F:	package/psimd/
 F:	package/pthreadpool/
 F:	package/ruy/
+F:	package/xnnpack/
 
 N:	Stefan Nickl <Stefan.Nickl@gmail.com>
 F:	board/freescale/imx8dxlevk/

package/Config.in

@@ -2318,6 +2318,7 @@ endif
 	source "package/uvw/Config.in"
 	source "package/volk/Config.in"
 	source "package/xapian/Config.in"
+	source "package/xnnpack/Config.in"
 endmenu
 
 menu "Security"

package/xnnpack/Config.in

@@ -0,0 +1,25 @@
+config BR2_PACKAGE_XNNPACK_ARCH_SUPPORTS
+	bool
+	default y if BR2_i386
+	default y if BR2_x86_64
+	depends on BR2_PACKAGE_CPUINFO_ARCH_SUPPORTS
+
+config BR2_PACKAGE_XNNPACK
+	bool "xnnpack"
+	depends on BR2_PACKAGE_XNNPACK_ARCH_SUPPORTS
+	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # C++14
+	depends on BR2_TOOLCHAIN_HAS_THREADS # cpuinfo
+	select BR2_PACKAGE_CPUINFO
+	select BR2_PACKAGE_FP16
+	select BR2_PACKAGE_FXDIV
+	select BR2_PACKAGE_PTHREADPOOL
+	help
+	  XNNPACK is a highly optimized solution for neural network
+	  inference on ARM, x86, WebAssembly, and RISC-V platforms.
+
+	  https://github.com/google/XNNPACK
+
+comment "xnnpack needs a toolchain w/ C++14, threads"
+	depends on !BR2_INSTALL_LIBSTDCPP || \
+		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 || !BR2_TOOLCHAIN_HAS_THREADS

package/xnnpack/xnnpack.hash

@@ -0,0 +1,4 @@
+# Locally calculated
+sha256  0ed35a104a697abbae72b02b967e057883ff57b388178649c453b68cffb81f72  xnnpack-d7f398ee5e135ef4f7045802eea973cc6cb26c6c.tar.gz
+# License files, locally calculated
+sha256  63f519e15726f4c4f830bd958f694c84fecb4e0a4cacc527d2696bb71ef95ada  LICENSE

package/xnnpack/xnnpack.mk

@@ -0,0 +1,21 @@
+################################################################################
+#
+# xnnpack
+#
+################################################################################
+
+XNNPACK_VERSION = d7f398ee5e135ef4f7045802eea973cc6cb26c6c
+XNNPACK_SITE = $(call github,google,XNNPACK,$(XNNPACK_VERSION))
+XNNPACK_LICENSE = BSD-3-Clause
+XNNPACK_LICENSE_FILES = LICENSE
+XNNPACK_INSTALL_STAGING = YES
+XNNPACK_DEPENDENCIES = cpuinfo fp16 fxdiv pthreadpool
+XNNPACK_CONF_OPTS = \
+	-DCPUINFO_SOURCE_DIR=$(STAGING_DIR)/usr \
+	-DCMAKE_POSITION_INDEPENDENT_CODE=ON \
+	-DXNNPACK_BUILD_TESTS=OFF \
+	-DXNNPACK_BUILD_BENCHMARKS=OFF \
+	-DXNNPACK_ENABLE_KLEIDIAI=OFF \
+	-DXNNPACK_USE_SYSTEM_LIBS=ON
+
+$(eval $(cmake-package))