#include <stdio.h> | |
#include <xbyak/xbyak.h> | |
struct Code : Xbyak::CodeGenerator { | |
Code(bool nf) { | |
xor_(eax, eax); // CF = 0 | |
mov(eax, -1); | |
if (nf) { | |
puts("no flags (with T_nf)"); | |
add(eax|T_nf, eax, 1); // does not change CF | |
} else { | |
puts("change flags (without T_nf)"); | |
add(eax, eax, 1); // CF = 1 | |
} | |
adc(eax, 0); // eax = CF ? 1 : 0 | |
ret(); | |
} | |
}; | |
int main() { | |
for (int i = 0; i < 2; i++) { | |
Code c(i); | |
printf("i=%d ret=%d\n", i, c.getCode<int(*)()>()()); | |
} | |
} |