caos-with-snake/cpu/x86.h

#pragma once
#include <stdint.h>

static inline void stosl(void *addr, int data, int cnt) {
    asm volatile("cld; rep stosl"
                 :
                 : "D"(addr), "c"(cnt), "a"(data)
                 : "memory");
}

static inline void stosb(void *addr, unsigned char data, int cnt) {
    asm volatile("cld; rep stosb"
                 :
                 : "D"(addr), "c"(cnt), "a"(data)
                 : "memory");
}

static inline void lcr3(uint32_t val) {
    asm volatile("mov %0,%%cr3" : : "r"(val));
}