Moved sizeof functions to a separate package

src/build/arch/x64/encodeNum.go

@@ -4,11 +4,12 @@ import (
 	"encoding/binary"
 
 	"git.akyoto.dev/cli/q/src/build/cpu"
+	"git.akyoto.dev/cli/q/src/build/sizeof"
 )
 
 // encodeNum encodes an instruction with up to two registers and a number parameter.
 func encodeNum(code []byte, mod AddressMode, reg cpu.Register, rm cpu.Register, number int, opCode8 byte, opCode32 byte) []byte {
-	if SizeOf(int64(number)) == 1 {
+	if sizeof.Signed(int64(number)) == 1 {
 		code = encode(code, mod, reg, rm, 8, opCode8)
 		return append(code, byte(number))
 	}