From c4a98361b15f1ef8d6143e00154866d6513b48be Mon Sep 17 00:00:00 2001
From: WeebDataHoarder <57538841+weebdatahoarder@users.noreply.github.com>
Date: Tue, 3 Aug 2021 17:54:27 +0200
Subject: [PATCH] Implement XOR (without offsets)

---
 src/instructions/Instruction.cpp | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/src/instructions/Instruction.cpp b/src/instructions/Instruction.cpp
index 7aeda5e..4e932c3 100644
--- a/src/instructions/Instruction.cpp
+++ b/src/instructions/Instruction.cpp
@@ -111,6 +111,35 @@ namespace Instruction {
             return std::move(i);
         });
 
+        //XOR P1, P2 = A, P3 = B
+        addOperator("XOR", 3, [](const parseOperatorResult &op, const std::vector<Token> &tokens) -> std::unique_ptr<Instruction> {
+            if(op.offset1 != 0){
+                throw std::runtime_error("XOR cannot use addressing offsets");
+            }
+            auto c = std::make_unique<Container>("XOR op = a + b - (a & b) - (a & b)");
+
+            /*
+             * Non-offset version
+             * AND S1, A, B
+             * ADD S0, A, B
+             * SUB S0, S0, S1
+             * SUB P1, S0, S1
+             */
+
+            if(tokens.at(2).getType() == Token::Type::Immediate){
+                c->addInstruction(std::make_unique<CalcImm>(Calc::Operation::AND, 0, (uint32_t) MgmtRegisters::std_SCRATCH_1, tokens.at(1).getNumericValue(), tokens.at(2).getNumericValue()), "XOR, s1 = a & b");
+                c->addInstruction(std::make_unique<CalcImm>(Calc::Operation::ADD, 0, (uint32_t) MgmtRegisters::std_SCRATCH_0, tokens.at(1).getNumericValue(), tokens.at(2).getNumericValue()), "XOR, s0 = a + b");
+            }else{
+                c->addInstruction(std::make_unique<Calc>(Calc::Operation::AND, 0, (uint32_t) MgmtRegisters::std_SCRATCH_1, tokens.at(1).getNumericValue(), tokens.at(2).getNumericValue()), "XOR, s1 = a & b");
+                c->addInstruction(std::make_unique<Calc>(Calc::Operation::ADD, 0, (uint32_t) MgmtRegisters::std_SCRATCH_0, tokens.at(1).getNumericValue(), tokens.at(2).getNumericValue()), "XOR, s0 = a + b");
+            }
+
+            c->addInstruction(std::make_unique<Calc>(Calc::Operation::SUB, 0, (uint32_t) MgmtRegisters::std_SCRATCH_0, (uint32_t) MgmtRegisters::std_SCRATCH_0, (uint32_t) MgmtRegisters::std_SCRATCH_1), "XOR, s0 = s0 - s1");
+            c->addInstruction(std::make_unique<Calc>(Calc::Operation::SUB, 0, tokens.at(0).getNumericValue(), (uint32_t) MgmtRegisters::std_SCRATCH_0, (uint32_t) MgmtRegisters::std_SCRATCH_1), "XOR, result = s0 - s1");
+
+            return std::move(c);
+        });
+
         addOperator("AND", 3, CalcImm::fromAndTokens);
 
         addOperator("OR", 3, CalcImm::fromOrTokens);