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#include <cstdint>
#include <cstdio>
using namespace std;
struct Register {
uint32_t value = 0;
uint8_t *l = (uint8_t *)&value;
uint8_t *h = (uint8_t *)&value + 1;
uint16_t *x = (uint16_t *)&value;
uint32_t *e = &value;
};
int main() {
Register eax, ecx, edx, ebx;
#define ax (*(eax.x))
#define dx (*(edx.x))
#define cx (*(ecx.x))
#define cl (*(ecx.l))
// mov ax,1234h
ax = 0x1234;
// mov cl,3
cl = 4;
// rol ax,cl
ax = (ax << cl) | (ax >> (16 - cl));
// dec ax
ax--;
// mov cx,4
cx = 4;
// mul cx
uint32_t ret = ax * cx;
ax = (uint16_t)ret;
dx = (uint16_t)(ret >> 16);
printf("ax = %#x\n", ax);
}
Cpp
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