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107 lines
3.5 KiB
C++
107 lines
3.5 KiB
C++
#include "DynamicStallTest.h"
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#include "VuAssembler.h"
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void CDynamicStallTest::Execute(CTestVm& virtualMachine)
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{
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virtualMachine.Reset();
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auto microMem = reinterpret_cast<uint32*>(virtualMachine.m_microMem);
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//Inspired by Time Crisis 4
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//Code expects two different pipeline timings.
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//One code branch doesn't stall and the other one does.
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{
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CVuAssembler assembler(microMem);
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auto jmpTarget = assembler.CreateLabel();
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//pipeTime = 0 (FMAC result available in pipeTime 4, DIV result will be available in pipeTime 7)
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assembler.Write(
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CVuAssembler::Upper::MADDbc(CVuAssembler::DEST_XYZW, CVuAssembler::VF10, CVuAssembler::VF8, CVuAssembler::VF0, CVuAssembler::BC_W),
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CVuAssembler::Lower::DIV(CVuAssembler::VF0, CVuAssembler::FVF_W, CVuAssembler::VF19, CVuAssembler::FVF_W));
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//pipeTime = 1
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assembler.Write(
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CVuAssembler::Upper::NOP(),
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CVuAssembler::Lower::NOP());
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//pipeTime = 2
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assembler.Write(
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CVuAssembler::Upper::NOP(),
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CVuAssembler::Lower::NOP());
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//pipeTime = 3
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assembler.Write(
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CVuAssembler::Upper::NOP(),
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CVuAssembler::Lower::NOP());
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//Run 1 - pipeTime = 4 (operation at pipeTime 0 completed, no stall)
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//Run 2 - pipeTime = 12-13-14 (stalling because FMAC operation is not over)
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assembler.MarkLabel(jmpTarget);
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assembler.Write(
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CVuAssembler::Upper::CLIP(CVuAssembler::VF10, CVuAssembler::VF10),
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CVuAssembler::Lower::NOP());
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//Run 1 - pipeTime = 5
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//Run 2 - pipeTime = 15
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assembler.Write(
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CVuAssembler::Upper::NOP(),
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CVuAssembler::Lower::NOP());
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//Run 1 - pipeTime = 6
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//Run 2 - pipeTime = 16
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assembler.Write(
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CVuAssembler::Upper::NOP(),
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CVuAssembler::Lower::NOP());
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//Run 1 - pipeTime = 7 (DIV result is available)
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//Run 2 - pipeTime = 17 (DIV result is available)
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assembler.Write(
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CVuAssembler::Upper::MULq(CVuAssembler::DEST_W, CVuAssembler::VF21, CVuAssembler::VF0),
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CVuAssembler::Lower::NOP());
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//Run 1 - pipeTime = 8
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assembler.Write(
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CVuAssembler::Upper::NOP(),
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CVuAssembler::Lower::IADDIU(CVuAssembler::VI1, CVuAssembler::VI1, 1));
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//Run 1 - pipeTime = 9 (DIV result will be available at pipeTime 16)
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assembler.Write(
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CVuAssembler::Upper::NOP(),
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CVuAssembler::Lower::DIV(CVuAssembler::VF0, CVuAssembler::FVF_W, CVuAssembler::VF20, CVuAssembler::FVF_W));
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//Run 1 - pipeTime = 10 (FMAC result will be available at pipeTime 14)
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assembler.Write(
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CVuAssembler::Upper::MADDbc(CVuAssembler::DEST_XYZW, CVuAssembler::VF10, CVuAssembler::VF8, CVuAssembler::VF0, CVuAssembler::BC_W),
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CVuAssembler::Lower::IBNE(CVuAssembler::VI1, CVuAssembler::VI2, jmpTarget));
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//Run 1 - pipeTime = 11
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assembler.Write(
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CVuAssembler::Upper::NOP(),
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CVuAssembler::Lower::SQ(CVuAssembler::DEST_XYZW, CVuAssembler::VF21, 0xFFFF, CVuAssembler::VI1));
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//
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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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//
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assembler.Write(
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CVuAssembler::Upper::NOP(),
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CVuAssembler::Lower::NOP());
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}
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auto vuMem = reinterpret_cast<uint128*>(virtualMachine.m_vuMem);
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virtualMachine.m_cpu.m_State.nCOP2[19] = uint128{Float::_2, Float::_2, Float::_2, Float::_2};
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virtualMachine.m_cpu.m_State.nCOP2[20] = uint128{Float::_4, Float::_4, Float::_4, Float::_4};
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virtualMachine.m_cpu.m_State.nCOP2VI[1] = 0;
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virtualMachine.m_cpu.m_State.nCOP2VI[2] = 2;
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virtualMachine.ExecuteTest(0);
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TEST_VERIFY(virtualMachine.m_cpu.m_State.nCOP2VI[2] == 2);
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TEST_VERIFY(vuMem[0].nV3 == Float::_1Half);
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TEST_VERIFY(vuMem[1].nV3 == Float::_1Quarter);
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}
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