Implemented more arm64 instructions

src/arm/Store.go

@@ -0,0 +1,24 @@
+package arm
+
+import (
+	"git.urbach.dev/cli/q/src/cpu"
+)
+
+// StoreRegister writes the contents of the register to a memory address.
+func StoreRegister(source cpu.Register, base cpu.Register, offset int, length byte) uint32 {
+	offset &= 0b1_1111_1111
+	common := uint32(offset)<<12 | uint32(base)<<5 | uint32(source)
+
+	switch length {
+	case 1:
+		return 0b00111<<27 | common
+	case 2:
+		return 0b01111<<27 | common
+	case 4:
+		return 0b10111<<27 | common
+	case 8:
+		return 0b11111<<27 | common
+	}
+
+	panic("invalid length")
+}