Detect ARM64 FP16 on aarch64

mingw-w64-opencv/0018-aarch64-fp16-mingw.patch

@@ -0,0 +1,12 @@
+diff -bur opencv-4.5.5-c/modules/core/src/system.cpp opencv-4.5.5/modules/core/src/system.cpp
+--- opencv-4.5.5-c/modules/core/src/system.cpp	2021-12-24 20:53:27.000000000 -0700
++++ opencv-4.5.5/modules/core/src/system.cpp	2022-08-10 01:11:19.072482300 -0600
+@@ -605,7 +605,7 @@
+     #if (defined __ARM_NEON__ || (defined __ARM_NEON && defined __aarch64__))
+         have[CV_CPU_NEON] = true;
+     #endif
+-    #if (defined __ARM_FP  && (((__ARM_FP & 0x2) != 0) && defined __ARM_NEON__))
++    #if (defined __ARM_FP  && (((__ARM_FP & 0x2) != 0) && (defined __ARM_NEON__ || defined __aarch64__)))
+         have[CV_CPU_FP16] = true;
+     #endif
+     #endif

mingw-w64-opencv/PKGBUILD

@@ -4,10 +4,10 @@ _realname=opencv
 pkgbase=mingw-w64-${_realname}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
 pkgver=4.5.5
-pkgrel=3
+pkgrel=4
 pkgdesc="Open Source Computer Vision Library (mingw-w64)"
 arch=('any')
-mingw_arch=('mingw32' 'mingw64' 'ucrt64' 'clang64' 'clang32')
+mingw_arch=('mingw32' 'mingw64' 'ucrt64' 'clang64' 'clang32' 'clangarm64')
 url="https://opencv.org/"
 license=("BSD")
 depends=(#"${MINGW_PACKAGE_PREFIX}-gst-plugins-base
@@ -62,6 +62,7 @@ source=("${_realname}-${pkgver}.tar.gz"::https://github.com/opencv/opencv/archiv
         '0015-windres-cant-handle-spaces-in-defines.patch'
         '0016-use-pkgconfig-and-link-pthread.patch'
         '0017-fix-highgui-qt-opengl-linking.patch'
+        '0018-aarch64-fp16-mingw.patch'
         '0101-somehow-uint-not-detected.patch'
         '0102-mingw-w64-have-sincos.patch'
         '0103-sfm-module-linking.patch'
@@ -80,6 +81,7 @@ sha256sums=('a1cfdcf6619387ca9e232687504da996aaa9f7b5689986b8331ec02cb61d28ad'
             '11522ffedb22980ba8d09ff715a25327fe14806e55588bffa761e39e1d035ea5'
             '4b0b9ee5f93e3c26397badf6b296a674b8f115129520a845d9f50d77d2c086d7'
             'f02b92aef58fcad8233a5041dfde7dacefa55efeb8266f58d1f6ba6ffc5301fc'
+            'cedb7593a377eb9e40c72762e79b2af56415ec410309ae8ff698557fe3f953f5'
             '7d2ff25f97c84b59793502786dd64e25c8ca991b0523ffea56b45ce031e80c3f'
             '2001804c5245af1894a308d6521f9cd044fb6dbd713b6e2e45106399a409c14d'
             '0422317096007b72ab4928b48762da4252addf3e4f8066ba94e29344f5975ab8'
@@ -118,7 +120,8 @@ prepare() {
         0014-python-install-path.patch \
         0015-windres-cant-handle-spaces-in-defines.patch \
         0016-use-pkgconfig-and-link-pthread.patch \
-        0017-fix-highgui-qt-opengl-linking.patch
+        0017-fix-highgui-qt-opengl-linking.patch \
+        0018-aarch64-fp16-mingw.patch
 
   cd "${srcdir}/${_realname}_contrib-${pkgver}"
   apply_patch_with_msg \