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add sample/zero_upper.cpp

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MITSUNARI Shigeo 2023-12-26 11:37:49 +09:00
parent f17cb9d6b9
commit bacd8d34b6
2 changed files with 53 additions and 1 deletions
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6
sample/Makefile
View file

@ -30,7 +30,7 @@ else
endif
ifeq ($(BIT),64)
TARGET += test64 bf64 memfunc64 test_util64 jmp_table64
TARGET += test64 bf64 memfunc64 test_util64 jmp_table64 zero_upper
ifeq ($(BOOST_EXIST),1)
TARGET += calc64 #calc2_64
endif
@ -103,6 +103,10 @@ profiler: profiler.cpp ../xbyak/xbyak_util.h
$(CXX) $(CFLAGS) profiler.cpp -o $@
profiler-vtune: profiler.cpp ../xbyak/xbyak_util.h
$(CXX) $(CFLAGS) profiler.cpp -o $@ -DXBYAK_USE_VTUNE -I /opt/intel/vtune_amplifier/include/ -L /opt/intel/vtune_amplifier/lib64 -ljitprofiling -ldl
zero_upper: zero_upper.cpp $(XBYAK_INC)
$(CXX) $(CFLAGS) zero_upper.cpp -o $@
test_zero_upper: zero_upper
sde -future -- ./zero_upper
clean:
rm -rf $(TARGET) profiler profiler-vtune

48
sample/zero_upper.cpp Normal file
View file

@ -0,0 +1,48 @@
/*
An example of T_zu (zero upper) flag
> g++ zero_upper.cpp -I ../xbyak
> sde -future -- ./a.out
*/
#include <stdio.h>
#include <xbyak/xbyak.h>
using namespace Xbyak;
struct Code : Xbyak::CodeGenerator {
Code(int mode)
{
mov(eax, 0x12345678);
cmp(eax, eax); // ZF=1
switch (mode) {
case 0: // imul
puts("imul");
imul(ax,ax, 0x1234);
break;
case 1: // imul+zu
puts("imul+zu");
imul(ax|T_zu, ax, 0x1234);
break;
case 2: // setz
puts("setz");
setz(al);
break;
case 3: // setz+zu
puts("setz+zu");
setz(al|T_zu);
break;
}
ret();
}
};
int main()
try
{
for (int mode = 0; mode < 4; mode++) {
Code c(mode);
auto f = c.getCode<int (*)()>();
printf("ret=%08x\n", f());
}
} catch (std::exception& e) {
printf("ERR %s\n", e.what());
}