update idle kernel

tests/regression/idle/hello.c

@@ -0,0 +1,39 @@
+#include <stdio.h>
+#include <stdbool.h>
+
+int main() {
+    int value32 = 4097;  // Value for x32
+    int value50 = -16778000;  // Value for x50
+    int value71 = 2147483647;  // Value for x71
+    int value125 = -2147483648; // Value for x125
+    int sum;
+
+    asm volatile (
+        // Assign values to the registers
+        "mv x32, %1\n"
+        "mv x50, %2\n"
+        "mv x71, %3\n"
+        "mv x125, %4\n"
+
+        // Sum the values in the registers
+        "add x32, x32, x50\n"  // x32 = x32 + x50
+        "add x32, x32, x71\n"  // x32 = x32 + x71
+        "add x32, x32, x125\n" // x32 = x32 + x125
+
+        // Move the result back to a C variable
+        "mv %0, x32\n"
+        : "=r" (sum) // Output
+        : "r" (value32), "r" (value50), "r" (value71), "r" (value125) // Inputs
+        : "x32", "x50", "x71", "x125" // Clobbered registers
+    );
+    volatile bool test = *(&value125 + 4);
+    if (test) {
+        printf("hello world 1!");
+    } else {
+        printf("hello world 2!");
+    }
+
+    // asm volatile (".insn r5 0, 0, 0, x101, x102, x103, x104, x105");
+
+    return sum;
+}