syntax fix + assembly calculate a^b

src/Makefile

@@ -1,6 +1,13 @@
 LDFLAGS="-L/usr/local/opt/flex/lib"
 
-machine.py: ram
+a_pow_b: ram
+	./ram < a_pow_b.1
+	echo "### machine.py ###"
+	cat machine.py
+	echo "### execution ###"
+	python machine.py
+
+test: ram
 	./ram < test.1
 	echo "### machine.py ###"
 	cat machine.py

src/a_pow_b.1

@@ -0,0 +1,11 @@
+(2,4,5)
+ADD(i1,0,r0)
+ADD(i1,0,r1)
+ADD(i1,0,r2)
+ADD(1,0,r3)
+JE(i2,r3,4)
+MULT(r2,r0,r2)
+ADD(1,r3,r3)
+JUMP(-3)
+ADD(0,1,o0)
+ADD(r2,0,o1)

src/ram.l

@@ -11,7 +11,7 @@
 %%
 [rio][0-9]*         { yylval = strdup(yytext); return REGISTER;}
 [rio]@[rio][0-9]*   { yylval = strdup(yytext); return REGISTER_REF;}
-[0-9]*              { yylval = strdup(yytext); return VALUE;}
+[\-0-9]*              { yylval = strdup(yytext); return VALUE;}
 ADD|SUB|MULT|DIV    { yylval = strdup(yytext); return OP;}
 JUMP|JE|JL          { yylval = strdup(yytext); return OP_CTRL;}
 [ ]*,[ ]*           {return COMMA;}

src/ram.y

@@ -84,9 +84,9 @@ args:
 ;
 
 args_ctrl:
-    VALUE COMMA arg COMMA arg {
+    arg COMMA arg COMMA VALUE {
         char* tmp = "";
-        asprintf(&tmp, "%c, %s, %s", $1, $3, $5);
+        asprintf(&tmp, "%s, %s, %s", $5, $1, $3);
         $$ = tmp;
         }
     |   VALUE {