uninit local var

    void bar() {
        int l;  // local variables don't have a default value
        printf("uninitialized local variable: %x\n", l);
    }

    void foo() {
        int xyz = 0x12345678;
        printf("quit foo w/ local var = %x\n", xyz);
    }

---
pointer arithmetic

    int main() {
        char *c = (char *)0x08200000;
        int  *i = (int *) 0x08200000;

        printf("%p %p\n", (c+1), (i+1));

        return 0;
    }

---
C arrays


    int a[3] = {1, 2, 3};    // an array of 3 int's
    char b[3] = {'a', 'b', 'c'};  // an array of 3 char's

    int main() {
      // first element is at index 0
      printf("%d\n", a[0]);

      a[1] += 1;  // use index access
      *(a+2) = 5; // pointer access

      printf("%d %d\n", a[1], a[2]);

      // pointers to array elements
      printf("a %p a1 %p a2 %p a2 %p\n", a, a+1, a+2, &a[2]);

      // pointer arithmetic uses type
      printf("%p %p\n", b, b+1);

      return 0;
    }

---
[skipped]
Bit fields:

struct xyz {
    int a : 1;
    int b : 31;
};

int main() {
    struct xyz i;
    i.a = 1;
    i.b = 0x7eadbeef;

    printf("a: %d, %b: %x\n", i.a, i.b);

  return 0;
}


---
Milk-V Pioneer

https://milkv.io/pioneer

---
XuanTie C920

https://xrvm.com/cpu-details?id=4108967096845668352

---
Alibaba cloud

https://www.alibabacloud.com/press-room/alibaba-unveils-risc-v-chip-development-platform

---
tenstorrent

https://tenstorrent.com/risc-v/