feat: Emulate SSE4.2 on ARM64

src/cpu.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+set -Eeuo pipefail
+
+KVM_ERR=""
+KVM_OPTS=""
+QEMU_CPU="qemu64,+ssse3,+sse4,+sse4.1,+sse4.2"
+
+if [ "$ARCH" == "amd64" ]; then
+
+  if [ -e /dev/kvm ] && sh -c 'echo -n > /dev/kvm' &> /dev/null; then
+    if ! grep -q -e vmx -e svm /proc/cpuinfo; then
+      KVM_ERR="(vmx/svm disabled)"
+    fi
+  else
+    [ -e /dev/kvm ] && KVM_ERR="(no write access)" || KVM_ERR="(device file missing)"
+  fi
+
+  if [ -n "$KVM_ERR" ]; then
+    error "KVM acceleration not detected $KVM_ERR, this will cause a major loss of performance."
+    error "See the FAQ on how to enable it, or skip this error by setting KVM=N (not recommended)."
+    [[ "$KVM" != [Nn]* ]] && [[ "$DEBUG" != [Yy1]* ]] && exit 88
+    [ "$CPU_MODEL" == "host"* ] && CPU_MODEL="$QEMU_CPU"
+  else
+    KVM_OPTS=",accel=kvm -enable-kvm"
+  fi
+
+  if [ "$CPU_MODEL" == "host" ]; then
+    if ! grep -qE '^flags.* (sse4_2)' /proc/cpuinfo; then
+      info "Your CPU does not have the SSE4.2 instruction set, it will be emulated.."
+      CPU_MODEL="host,+ssse3,+sse4,+sse4.1,+sse4.2"
+    fi
+  fi
+else
+  [ "$CPU_MODEL" == "host"* ] && CPU_MODEL="$QEMU_CPU"
+fi
+
+return 0