--- /dev/null
+#!/bin/sh
+
+#
+# Returns properties of the native system.
+# best architecture as supported by the CPU
+# filename of the best binary uploaded as an artifact during CI
+#
+
+# Check if all the given flags are present in the CPU flags list
+check_flags() {
+ for flag; do
+ printf '%s\n' "$flags" | grep -q -w "$flag" || return 1
+ done
+}
+
+# Set the CPU flags list
+# remove underscores and points from flags, e.g. gcc uses avx512vnni, while some cpuinfo can have avx512_vnni, some systems use sse4_1 others sse4.1
+get_flags() {
+ flags=$(awk '/^flags[ \t]*:|^Features[ \t]*:/{gsub(/^flags[ \t]*:[ \t]*|^Features[ \t]*:[ \t]*|[_.]/, ""); line=$0} END{print line}' /proc/cpuinfo)
+}
+
+# Check for gcc march "znver1" or "znver2" https://en.wikichip.org/wiki/amd/cpuid
+check_znver_1_2() {
+ vendor_id=$(awk '/^vendor_id/{print $3; exit}' /proc/cpuinfo)
+ cpu_family=$(awk '/^cpu family/{print $4; exit}' /proc/cpuinfo)
+ [ "$vendor_id" = "AuthenticAMD" ] && [ "$cpu_family" = "23" ] && znver_1_2=true
+}
+
+# Set the file CPU x86_64 architecture
+set_arch_x86_64() {
+ if check_flags 'avx512vnni' 'avx512dq' 'avx512f' 'avx512bw' 'avx512vl'; then
+ true_arch='x86-64-vnni256'
+ elif check_flags 'avx512f' 'avx512bw'; then
+ true_arch='x86-64-avx512'
+ elif [ -z "${znver_1_2+1}" ] && check_flags 'bmi2'; then
+ true_arch='x86-64-bmi2'
+ elif check_flags 'avx2'; then
+ true_arch='x86-64-avx2'
+ elif check_flags 'sse41' && check_flags 'popcnt'; then
+ true_arch='x86-64-sse41-popcnt'
+ else
+ true_arch='x86-64'
+ fi
+}
+
+# Check the system type
+uname_s=$(uname -s)
+uname_m=$(uname -m)
+case $uname_s in
+ 'Darwin') # Mac OSX system
+ case $uname_m in
+ 'arm64')
+ true_arch='apple-silicon'
+ file_arch='x86-64-sse41-popcnt' # Supported by Rosetta 2
+ ;;
+ 'x86_64')
+ flags=$(sysctl -n machdep.cpu.features machdep.cpu.leaf7_features | tr '\n' ' ' | tr '[:upper:]' '[:lower:]' | tr -d '_.')
+ set_arch_x86_64
+ if [ "$true_arch" = 'x86-64-vnni256' ] || [ "$true_arch" = 'x86-64-avx512' ]; then
+ file_arch='x86-64-bmi2'
+ fi
+ ;;
+ esac
+ file_os='macos'
+ file_ext='tar'
+ ;;
+ 'Linux') # Linux system
+ get_flags
+ case $uname_m in
+ 'x86_64')
+ file_os='ubuntu'
+ check_znver_1_2
+ set_arch_x86_64
+ ;;
+ 'i686')
+ file_os='ubuntu'
+ true_arch='x86-32'
+ ;;
+ 'aarch64')
+ file_os='android'
+ true_arch='armv8'
+ if check_flags 'dotprod'; then
+ true_arch="$true_arch-dotprod"
+ fi
+ ;;
+ 'armv7'*)
+ file_os='android'
+ true_arch='armv7'
+ if check_flags 'neon'; then
+ true_arch="$true_arch-neon"
+ fi
+ ;;
+ *) # Unsupported machine type, exit with error
+ printf 'Unsupported machine type: %s\n' "$uname_m"
+ exit 1
+ ;;
+ esac
+ file_ext='tar'
+ ;;
+ 'CYGWIN'*|'MINGW'*|'MSYS'*) # Windows system with POSIX compatibility layer
+ get_flags
+ check_znver_1_2
+ set_arch_x86_64
+ file_os='windows'
+ file_ext='zip'
+ ;;
+ *)
+ # Unknown system type, exit with error
+ printf 'Unsupported system type: %s\n' "$uname_s"
+ exit 1
+ ;;
+esac
+
+if [ -z "$file_arch" ]; then
+ file_arch=$true_arch
+fi
+
+file_name="stockfish-$file_os-$file_arch.$file_ext"
+
+printf '%s %s\n' "$true_arch" "$file_name"