write strcpy in asm and add some testing

src/library.js

@@ -4329,14 +4329,18 @@ LibraryManager.library = {
     }
   },
 
+  strcpy__asm: 'true',
+  strcpy__sig: 'iii',
   strcpy: function(pdest, psrc) {
+    pdest = pdest|0; psrc = psrc|0;
     var i = 0;
     do {
-      {{{ makeCopyValues('pdest+i', 'psrc+i', 1, 'i8', null, 1) }}};
-      i ++;
-    } while ({{{ makeGetValue('psrc', 'i-1', 'i8') }}} != 0);
-    return pdest;
+      {{{ makeCopyValues('(pdest+i)|0', '(psrc+i)|0', 1, 'i8', null, 1) }}};
+      i = (i+1)|0;
+    } while (({{{ makeGetValue('psrc', 'i-1', 'i8') }}})|0 != 0);
+    return pdest|0;
   },
+
   stpcpy: function(pdest, psrc) {
     var i = 0;
     do {

tests/runner.py

@@ -4117,10 +4117,12 @@ The current type of b is: 9
 
           #define CONSTRLEN 32
 
+          char * (*func)(char *, const char *) = NULL;
+
           void conoutfv(const char *fmt)
           {
               static char buf[CONSTRLEN];
-              strcpy(buf, fmt);
+              func(buf, fmt); // call by function pointer to make sure we test strcpy here
               puts(buf);
           }
 
@@ -4142,6 +4144,7 @@ The current type of b is: 9
           };
 
           int main() {
+            func = &strcpy;
             conoutfv("*staticccz*");
             printf("*%.2f,%.2f,%.2f*\\n", S::getIdentity().x, S::getIdentity().y, S::getIdentity().z);
             return 0;