68 lines
1.5 KiB
C++
68 lines
1.5 KiB
C++
/*
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An example of ccmp
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> g++ ccmp.cpp -I ../xbyak
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> sde -future -- ./a.out
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*/
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#include <stdio.h>
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#include <xbyak/xbyak.h>
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#include <xbyak/xbyak_util.h>
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using namespace Xbyak;
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struct Code1 : Xbyak::CodeGenerator {
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Code1()
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{
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Xbyak::util::StackFrame sf(this, 2);
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const auto& p1 = sf.p[0];
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const auto& p2 = sf.p[1];
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int dfv = 0;
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cmp(p1, 3);
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ctesta(p2, 1, dfv); // eflags = (p1 > 3) ? ((p2 & 1) == 0) : dfv;
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setz(al|T_zu);
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}
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};
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struct Code2 : Xbyak::CodeGenerator {
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Code2()
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{
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Xbyak::util::StackFrame sf(this, 3);
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const auto& p1 = sf.p[0];
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const auto& p2 = sf.p[1];
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const auto& p3 = sf.p[2];
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int dfv = 0;
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cmp(p1, 1);
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ccmpe(p2, 2, dfv); // eflags = p1==1 ? p2==2 : dfv;
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ccmpe(p3, 3, dfv); // eflags = (p1==1 && p2==2) ? p3==3 : dfv;
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setz(al|T_zu); // p1==1 && p2==2 && p3==3
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}
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};
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int main()
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try
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{
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{
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puts("(p1 > 3) && ((p2 & 1) == 0)");
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Code1 c;
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auto f = c.getCode<int (*)(int, int)>();
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for (int p1 = 2; p1 < 5; p1++) {
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for (int p2 = 0; p2 < 3; p2++) {
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printf("p1=%d p2=%d ret=%d (%d)\n", p1, p2, f(p1, p2), p1 > 3 && ((p2&1) == 0));
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}
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}
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}
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{
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puts("p1 == 1 && p2 == 2 && p3 == 3");
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Code2 c;
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auto f = c.getCode<int (*)(int, int, int)>();
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for (int p1 = 0; p1 < 3; p1++) {
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for (int p2 = 1; p2 < 4; p2++) {
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for (int p3 = 2; p3 < 5; p3++) {
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printf("p1=%d p2=%d p3=%d ret=%d (%d)\n", p1, p2, p3, f(p1, p2, p3), p1==1 && p2==2 && p3==3);
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}
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}
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}
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}
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} catch (std::exception& e) {
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printf("ERR %s\n", e.what());
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}
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