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60 lines
2.1 KiB
C++
60 lines
2.1 KiB
C++
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#include "MinMaxFlagsTest.h"
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#include "VuAssembler.h"
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void CMinMaxFlagsTest::Execute(CTestVm& virtualMachine)
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{
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auto flagsMaskRegister = CVuAssembler::VI1;
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auto flagsResultRegister = CVuAssembler::VI2;
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virtualMachine.Reset();
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auto microMem = reinterpret_cast<uint32*>(virtualMachine.m_microMem);
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CVuAssembler assembler(microMem);
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//Inspired by Legacy of Kain: Defiance
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//Just make sure that the compiler doesn't think that MINI/MAX changes MACflags
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//It can throw off the flags computation elision optimization and give wrong results
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//This will set the MACflag to ZX = 1
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assembler.Write(
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CVuAssembler::Upper::ADDbc(CVuAssembler::DEST_X, CVuAssembler::VF0, CVuAssembler::VF0, CVuAssembler::VF0, CVuAssembler::BC_Z),
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CVuAssembler::Lower::IADDIU(flagsMaskRegister, CVuAssembler::VI0, 0x7FFF));
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assembler.Write(
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CVuAssembler::Upper::MINI(CVuAssembler::DEST_YZW, CVuAssembler::VF3, CVuAssembler::VF1, CVuAssembler::VF2),
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CVuAssembler::Lower::NOP());
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assembler.Write(
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CVuAssembler::Upper::MINI(CVuAssembler::DEST_YZW, CVuAssembler::VF3, CVuAssembler::VF1, CVuAssembler::VF2),
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CVuAssembler::Lower::NOP());
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assembler.Write(
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CVuAssembler::Upper::MINI(CVuAssembler::DEST_YZW, CVuAssembler::VF3, CVuAssembler::VF1, CVuAssembler::VF2),
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CVuAssembler::Lower::NOP());
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assembler.Write(
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CVuAssembler::Upper::MINI(CVuAssembler::DEST_YZW, CVuAssembler::VF3, CVuAssembler::VF1, CVuAssembler::VF2),
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CVuAssembler::Lower::NOP());
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assembler.Write(
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CVuAssembler::Upper::MINI(CVuAssembler::DEST_YZW, CVuAssembler::VF3, CVuAssembler::VF1, CVuAssembler::VF2),
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CVuAssembler::Lower::NOP());
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assembler.Write(
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CVuAssembler::Upper::MINI(CVuAssembler::DEST_YZW, CVuAssembler::VF3, CVuAssembler::VF1, CVuAssembler::VF2),
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CVuAssembler::Lower::FMAND(flagsResultRegister, flagsMaskRegister));
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assembler.Write(
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CVuAssembler::Upper::NOP() | CVuAssembler::Upper::E_BIT,
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CVuAssembler::Lower::NOP());
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assembler.Write(
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CVuAssembler::Upper::NOP(),
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CVuAssembler::Lower::NOP());
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virtualMachine.ExecuteTest(0);
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TEST_VERIFY(virtualMachine.m_cpu.m_State.nCOP2VI[flagsResultRegister] == 0x8);
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}
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