Added runtime (kernel 2.0)

runtime/io/vx_io.c

@@ -0,0 +1,30 @@
+
+#include "vx_io.h"
+
+void vx_print_hex(unsigned f)
+{
+	vx_print_str(hextoa[f]);
+	// if (f < 16)
+	// {
+	// 	vx_print_str(hextoa[f]);
+	// 	return;
+	// }
+	// int temp;
+	// int sf = 32;
+	// bool start = false;
+	// do
+	// {
+	// 	temp = (f >> (sf - 4)) & 0xf;
+	// 	if (temp != 0) start = true;
+	// 	if (start) vx_print_str(hextoa[temp]);
+	// 	sf -= 4;
+	// } while(sf > 0);
+}
+
+
+void vx_printf(char * c, unsigned f)
+{
+	vx_print_str(c);
+	vx_print_hex(f);
+	vx_print_str("\n");
+}

runtime/io/vx_io.h

@@ -0,0 +1,10 @@
+
+#pragma once
+
+#include <stdbool.h>
+
+static char * hextoa[] = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};
+void vx_print_hex(unsigned);
+void vx_print_str(char *);
+void vx_printf(char *, unsigned);
+void vx_printc(unsigned, char c);

runtime/io/vx_io.s

@@ -0,0 +1,30 @@
+
+
+.type vx_print_str, @function
+.global vx_print_str
+vx_print_str:
+    addi sp, sp, -12
+    sw   ra, 0(sp)
+    sw   a1, 4(sp)
+bl:
+    lbu  a1,0(a0)
+    beqz a1,be
+    jal  vx_printc
+    addi a0, a0, 1
+    j bl
+be:
+    lw   ra, 0(sp)
+    lw   a1, 4(sp)
+    addi sp, sp, 12
+    ret
+
+
+.type vx_printc, @function
+.global vx_printc
+vx_printc:
+    la t0, 0x00010000
+    sw a1, 0(t0)
+    ret
+
+
+