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