Create common function for running instructions

[emu8051.git] / src / common / cpu8051.c

diff --git a/src/common/cpu8051.c b/src/common/cpu8051.c
index bf7bd99..2c2845e 100644 (file)
--- a/src/common/cpu8051.c
+++ b/src/common/cpu8051.c
@@ -24,7 +24,9 @@
 
 #include <stdio.h>
 #include <stdint.h>
+#include <stdbool.h>
 
+#include "common.h"
 #include "reg8051.h"
 #include "cpu8051.h"
 #include "memory.h"
@@ -319,6 +321,53 @@ cpu8051_Exec(void)
        }
 }
 
+/*
+ * Run specified number of instructions, or when encountering a
+ * breakpoint or a stop point.
+ * Set instr_count to -1 to disable running for a specific number
+ * of instructions.
+ *
+ * Returns TRUE when a breakpoint is encountered.
+ */
+int
+cpu8051_run(int instr_count, int (*interface_stop)(void))
+{
+       int stop = false;
+       int breakpoint_hit = false;
+
+       while (stop == false) {
+               cpu8051_Exec();
+
+               if (instr_count > 0)
+                       instr_count--;
+
+               if (instr_count == 0) {
+                       stop = true;
+                       log_info("Number of instructions reached! Stopping!");
+               }
+
+               if (IsBreakpoint(cpu8051.pc)) {
+                       stop = true;
+                       breakpoint_hit = true;
+                       log_info("Breakpoint hit at %.4X! Stopping!", cpu8051.pc);
+               }
+
+               if (IsStoppoint(cpu8051.pc)) {
+                       stop = true;
+                       log_info("Stoppoint hit at %.4X! Stopping!", cpu8051.pc);
+               }
+
+               if (interface_stop != NULL) {
+                       if (interface_stop()) {
+                               stop = true;
+                               log_info("Caught break signal!");
+                       }
+               }
+       }
+
+       return breakpoint_hit;
+}
+
 /*
  * Addressing modes defined in the order as they appear in disasm.h
  * from table argstext[]