Implemented bitwise AND on arm64

src/arm/And.go

@@ -0,0 +1,21 @@
+package arm
+
+import (
+	"git.urbach.dev/cli/q/src/cpu"
+)
+
+// AndRegisterNumber performs a bitwise AND using a register and a number.
+func AndRegisterNumber(destination cpu.Register, source cpu.Register, number int) uint32 {
+	imm13, encodable := encodeLogicalImmediate(uint(number))
+
+	if !encodable {
+		panic("bitwise and operand can't be encoded as a bitmask immediate")
+	}
+
+	return 0b100100100<<23 | uint32(imm13)<<10 | reg2(destination, source)
+}
+
+// AndRegisterRegister performs a bitwise AND using two registers.
+func AndRegisterRegister(destination cpu.Register, source cpu.Register, operand cpu.Register) uint32 {
+	return 0b10001010<<24 | reg3Imm(destination, source, operand, 0)
+}