From d39ad32438bded26d4d65b7b81e415b5c709e8b3 Mon Sep 17 00:00:00 2001
From: Jason Turner <jason@emptycrate.com>
Date: Wed, 5 May 2021 17:02:38 -0600
Subject: [PATCH] convert sec/sbc with cmp, increase perf

---
 src/main.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index 0e0a235..06ab0be 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1005,8 +1005,7 @@ void translate_instruction(std::vector<mos6502> &instructions, const AVR::OpCode
   case AVR::OpCode::cpi: {
     // note that this will leave the C flag in the 6502 borrow state, not normal carry state
     instructions.emplace_back(mos6502::OpCode::lda, AVR::get_register(o1_reg_num));
-    instructions.emplace_back(mos6502::OpCode::sec);
-    instructions.emplace_back(mos6502::OpCode::sbc, Operand(o2.type, fixup_8bit_literal(o2.value)));
+    instructions.emplace_back(mos6502::OpCode::cmp, Operand(o2.type, fixup_8bit_literal(o2.value)));
     return;
   }
   case AVR::OpCode::brlo: {
@@ -1074,6 +1073,7 @@ void translate_instruction(std::vector<mos6502> &instructions, const AVR::OpCode
       return;
     } else {
       instructions.emplace_back(mos6502::OpCode::bcs, o1);
+      return;
     }
 
   }