vortex runtime console out implementation

runtime/src/vx_print.S

@@ -3,15 +3,9 @@
 .type vx_putchar, @function
 .global vx_putchar
 vx_putchar:
-    la t0, print_addr
-    lw t0, 0(t0)
-    csrr t1, CSR_GTID
-    slli t1, t1, 16
-    or t1, t1, a0
-    sw t1, 0(t0)
-    ret
-
-.section .data
-print_addr:
-    .word IO_COUT_ADDR 
-
+    csrr t0, CSR_GTID
+    andi t0, t0, %lo(IO_COUT_SIZE-1)
+    li t1, IO_COUT_ADDR
+    add t0, t0, t1    
+    sb a0, 0(t0)
+    ret

runtime/src/vx_print.c

@@ -64,7 +64,7 @@ static const char* skip_modifier(const char* format) {
 		break;
 	case 'j':
 	case 'z':
-  case 't':
+    case 't':
 	case 'L':
 		++format;
 		break;
@@ -123,10 +123,10 @@ int vx_vprintf(const char* format, va_list va) {
 
 int vx_printf(const char * format, ...) {
 	va_list va;
-  va_start(va, format);
+  	va_start(va, format);
 	int ret = vx_vprintf(format, va);
-  va_end(va);
-  return ret;
+  	va_end(va);
+  	return ret;
 }
 
 static const char hextoa[] = "0123456789abcdef";