Added basic support for arm64

src/arm/Move.go

@@ -0,0 +1,29 @@
+package arm
+
+import (
+	"encoding/binary"
+
+	"git.urbach.dev/cli/q/src/cpu"
+)
+
+// MoveRegisterNumber moves an integer into the given register.
+func MoveRegisterNumber(code []byte, destination cpu.Register, number int) []byte {
+	return MoveZero(code, destination, 0, uint16(number))
+}
+
+// MoveKeep moves a 16-bit integer into the given register and keeps all other bits.
+func MoveKeep(code []byte, destination cpu.Register, halfword int, number uint16) []byte {
+	x := mov(0b11, halfword, number, destination)
+	return binary.LittleEndian.AppendUint32(code, x)
+}
+
+// MoveZero moves a 16-bit integer into the given register and clears all other bits to zero.
+func MoveZero(code []byte, destination cpu.Register, halfword int, number uint16) []byte {
+	x := mov(0b10, halfword, number, destination)
+	return binary.LittleEndian.AppendUint32(code, x)
+}
+
+// mov encodes a generic move instruction.
+func mov(opCode uint32, halfword int, number uint16, destination cpu.Register) uint32 {
+	return (1 << 31) | (opCode << 29) | (0b100101 << 23) | uint32(halfword<<21) | uint32(number<<5) | uint32(destination)
+}