SUB: subtract the two arguments; treat link as carry
MAX:
MIN:
-SORT: output min(in1,in2) followed by max(in1,in2) (FIXME: redundant?)
== TeX ==============================================================
This ship is a two-input arithmetic unit. It features several
Use carry-in bit to create a selector? Perhaps a waste of an ALU.
-Carry-save / carry completion stuff.
-
Flags: zero, negative, overflow, ?
+\begin{verbatim}
move elsewhere:
//MUL:
//DIV:
//MOD:
+\end{verbatim}
== Fleeterpreter ====================================================
+public long resolveLiteral(String literal) {
+ if (literal.equals("ADD")) return 0;
+ if (literal.equals("SUB")) return 1;
+ if (literal.equals("MAX")) return 2;
+ if (literal.equals("MIN")) return 3;
+ return super.resolveLiteral(literal);
+}
public void service() {
if (box_in1.dataReadyForShip() &&
box_in2.dataReadyForShip() &&
box_inOp.dataReadyForShip() &&
- box_out.readyForItemFromShip()) {
- int a = box_in1.removeDataForShip();
- int b = box_in2.removeDataForShip();
- int op = box_inOp.removeDataForShip();
- switch(op) {
+ box_out.readyForDataFromShip()) {
+ long a = box_in1.removeDataForShip();
+ long b = box_in2.removeDataForShip();
+ long op = box_inOp.removeDataForShip();
+ switch((int)op) {
case 0: box_out.addDataFromShip(a+b); // ADD
break;
case 1: box_out.addDataFromShip(a-b); // SUB
break;
- case 2: box_out.addDataFromShip(Math.max(a,b)); // ADD
+ case 2: box_out.addDataFromShip(Math.max(a,b)); // MAX
break;
- case 3: box_out.addDataFromShip(Math.min(a,b)); // SUB
+ case 3: box_out.addDataFromShip(Math.min(a,b)); // MIN
break;
default: box_out.addDataFromShip(0);
break;
end
end
+== Test ==============================================================================
+// expected output
+#ship debug : Debug
+#ship alu : Alu2
+
+#expect 17
+#expect 1
+#expect 8
+#expect 9
+
+debug.in: [*] take, deliver;
+9: sendto alu.in1;
+9: sendto alu.in1;
+9: sendto alu.in1;
+9: sendto alu.in1;
+8: sendto alu.in2;
+8: sendto alu.in2;
+8: sendto alu.in2;
+8: sendto alu.in2;
+
+Alu2.ADD: sendto alu.inOp;
+Alu2.SUB: sendto alu.inOp;
+Alu2.MIN: sendto alu.inOp;
+Alu2.MAX: sendto alu.inOp;
+
+alu.in1: [*] take, deliver;
+alu.in2: [*] take, deliver;
+alu.inOp: [*] take, deliver;
+alu.out: [*] take, sendto debug.in;
+