From c0bfc265d02e8cbac078d728ed6f0bcc3a958315 Mon Sep 17 00:00:00 2001
From: PalindromicBreadLoaf <herbthehaircut@proton.me>
Date: Wed, 23 Jul 2025 19:16:20 -0400
Subject: [PATCH] Implement State Clear Instructions

---
 src/cpu.cpp | 26 ++++++++++++++++++++++++++
 src/cpu.h   |  5 +++++
 2 files changed, 31 insertions(+)

diff --git a/src/cpu.cpp b/src/cpu.cpp
index a4ca4f0..adaded4 100644
--- a/src/cpu.cpp
+++ b/src/cpu.cpp
@@ -349,6 +349,12 @@ void CPU::ExecuteInstruction() {
         case 0x24: BIT_DirectPage(); break;     // BIT $nn
         case 0x34: BIT_DirectPageX(); break;    // BIT $nn,X
 
+        // Clear State Flags Instructions
+        case 0x18: CLC(); break;    // CLC
+        case 0xD8: CLD(); break;    // CLD
+        case 0x58: CLI(); break;    // CLI
+        case 0xB8: CLV(); break;    // CLV
+
         // CMP - Compare Accumulator
         case 0xC9: CMP_Immediate(); break;             // CMP #$nn or #$nnnn
         case 0xCD: CMP_Absolute(); break;              // CMP $nnnn
@@ -2794,4 +2800,24 @@ void CPU::BRK() {
 
         cycles += 4;
     }
+}
+
+void CPU::CLC() {
+    P &= ~FLAG_C;
+    cycles += 2;
+}
+
+void CPU::CLD() {
+    P &= ~FLAG_D;
+    cycles += 2;
+}
+
+void CPU::CLI() {
+    P &= ~FLAG_I;
+    cycles += 2;
+}
+
+void CPU::CLV() {
+    P &= ~FLAG_V;
+    cycles += 2;
 }
\ No newline at end of file
diff --git a/src/cpu.h b/src/cpu.h
index e0d47dc..7e7c924 100644
--- a/src/cpu.h
+++ b/src/cpu.h
@@ -251,6 +251,11 @@ public:
     void BVC_Relative();
     void BVS_Relative();
     void BRK();
+
+    void CLC();
+    void CLD();
+    void CLI();
+    void CLV();
 };
 
 #endif //CPU_H