Better label handling

include/lib1funcs.hpp

@@ -2,7 +2,7 @@
 static constexpr std::string_view __mulhi3 = 
 R"(
 ;;; based on protocol from gcc's calling conventions for AVR
-
+;;; 16x16 = 16 multiply
 ;;; R25:R24 = R23:R22 * R25:R24
 ;;; Clobbers: __tmp_reg__, R21..R23
 
@@ -33,3 +33,22 @@ __mulhi3:
 )";
 
 
+static constexpr std::string_view __mulqi3 =
+  R"(
+;;; based on protocol from gcc's calling conventions for AVR
+;;; 8x8 = 8 multiply
+;;; R24 = R22 * R24
+;;; Clobbers: __tmp_reg__, R22, R24
+
+__mulqi3:
+        ldi __temp_reg__,0
+__mulqi_1:
+        sbrc r24,0
+        add __temp_reg__,r22
+        lsr r24
+        lsl r22
+        cpse r24,__zero_reg__
+        rjmp __mulqi_1
+        mov r24, __temp_reg__
+        ret
+)";

include/optimizer.hpp

@@ -285,13 +285,15 @@ bool optimize(std::vector<mos6502> &instructions, [[maybe_unused]] const Persona
     }
   }
 
-  bool block_optimized = false;
+  bool optimizer_run = false;
   for (auto &block : get_optimizable_blocks(instructions)) {
-    block_optimized = block_optimized || optimize_redundant_lda_after_sta(block)
+    const bool block_optimized = optimize_redundant_lda_after_sta(block)
                       || optimize_dead_sta(block, personality) || optimize_dead_tax(block)
                       || optimize_redundant_ldy(block) || optimize_redundant_lda(block, personality);
+
+    optimizer_run = optimizer_run || block_optimized;
   }
-  return block_optimized;
+  return optimizer_run;
 }
 
 #endif// INC_6502_CPP_OPTIMIZER_HPP