Create test_z_inst.c

Added examples folder 
Added test code to test basic instructions like add , sub and msr
This code is in processes of further expansion and tuning

dynasm/Examples/test_z_inst.c

@@ -0,0 +1,80 @@
+#include <assert.h>
+#include <stdio.h>
+#include <sys/mman.h>
+
+#include "../dynasm/dasm_proto.h"
+#include "../dynasm/dasm_s390x.h"
+
+//DynASM directives.
+ |.arch s390x
+ |.actionlist actions
+
+/* Instructio modes
+   mode 0 : RR Mode
+   mode 1 : I Mode
+*/
+
+void *jitcode(dasm_State **state);
+void add(dasm_State * , int);
+void sub(dasm_State * , int);
+void mul(dasm_State * , int);
+
+void *jitcode(dasm_State **state) 
+{
+  size_t size;
+  int dasm_status = dasm_link(state, &size);
+  assert(dasm_status == DASM_S_OK);
+
+  void *ret = (int *)calloc(10,sizeof(int));
+  dasm_encode(state, ret);
+  dasm_free(state);
+
+  return (int *)ret;
+}
+
+void add(dasm_State *state)
+{
+   dasm_State ** Dst = &state;
+   
+   | ar r2,r3
+   | br r14
+} 
+
+void sub(dasm_State *state)
+{
+  dasm_State **Dst = &state;
+  
+  | sr r2,r3
+  | br r14
+}
+
+void mul(dasm_State *state)
+{
+  dasm_State **Dst = &state;
+  
+  | msr r2 , r3
+  | br r14
+}
+
+void main(int argc, char *argv[]) 
+{
+  dasm_State *state;
+  dasm_State **Dst = &state;
+  int num1 , num2;
+  int *ret;
+  size_t size;
+  
+  int* (*fptr)(int , int) = jitcode(&state);
+
+  num1 = atoi(argv[1]);
+  num2 = atoi(argv[2]);
+
+  dasm_init(&state, 1);
+  dasm_setup(&state, actions);
+
+  /* Call respective test function */
+  sub(state);
+
+  ret = fptr(num1 , num2);
+  printf("The value is %d\n" ,ret);
+}