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91 lines
3.1 KiB
C++
91 lines
3.1 KiB
C++
#include "DynamicStallTest2.h"
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#include "VuAssembler.h"
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void CDynamicStallTest2::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 Metal Gear Solid 2
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//No stall occurs in this piece of code, but making sure we don't trigger any dynamic stalling
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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 (flags) result available in pipeTime 4)
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assembler.Write(
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CVuAssembler::Upper::SUB(CVuAssembler::DEST_XYZW, CVuAssembler::VF0, CVuAssembler::VF21, CVuAssembler::VF13),
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CVuAssembler::Lower::NOP());
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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 (write VF27x, result available at pipeTime 6)
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assembler.Write(
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CVuAssembler::Upper::ADDbc(CVuAssembler::DEST_X, CVuAssembler::VF27, CVuAssembler::VF27, CVuAssembler::VF27, CVuAssembler::BC_Z),
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CVuAssembler::Lower::NOP());
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//pipeTime = 3 (write VF26x, result available at pipeTime 7)
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assembler.Write(
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CVuAssembler::Upper::ADDbc(CVuAssembler::DEST_X, CVuAssembler::VF26, CVuAssembler::VF26, CVuAssembler::VF26, CVuAssembler::BC_Z),
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CVuAssembler::Lower::NOP());
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//pipeTime = 4 (FMAND obtain result from SUB operation at time 0)
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assembler.Write(
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CVuAssembler::Upper::SUB(CVuAssembler::DEST_XYZW, CVuAssembler::VF0, CVuAssembler::VF21, CVuAssembler::VF13),
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CVuAssembler::Lower::FMAND(CVuAssembler::VI11, CVuAssembler::VI10));
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//pipeTime = 5
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assembler.Write(
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CVuAssembler::Upper::NOP(),
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CVuAssembler::Lower::IBEQ(CVuAssembler::VI1, CVuAssembler::VI0, jmpTarget));
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//pipeTime = 6
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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 = 7 (VF26x and VF27x are available, no stall, FMAND result from op at time 3)
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assembler.Write(
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CVuAssembler::Upper::SUB(CVuAssembler::DEST_XYZ, CVuAssembler::VF0, CVuAssembler::VF27, CVuAssembler::VF26),
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CVuAssembler::Lower::FMAND(CVuAssembler::VI12, CVuAssembler::VI10));
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//pipeTime = 8
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assembler.Write(
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CVuAssembler::Upper::NOP(),
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CVuAssembler::Lower::IBEQ(CVuAssembler::VI1, CVuAssembler::VI0, jmpTarget));
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assembler.Write(
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CVuAssembler::Upper::NOP(),
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CVuAssembler::Lower::NOP());
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assembler.MarkLabel(jmpTarget);
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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[13] = uint128{Float::_4, Float::_4, Float::_4, Float::_4};
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virtualMachine.m_cpu.m_State.nCOP2[21] = uint128{Float::_2, Float::_2, Float::_2, Float::_2};
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virtualMachine.m_cpu.m_State.nCOP2VI[1] = 1;
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virtualMachine.m_cpu.m_State.nCOP2VI[10] = 0xFF; //Check sign and zero
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virtualMachine.ExecuteTest(0);
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TEST_VERIFY(virtualMachine.m_cpu.m_State.nCOP2VI[11] == 0xF0); //VF21 - VF13 -> negative result
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TEST_VERIFY(virtualMachine.m_cpu.m_State.nCOP2VI[12] == 0x08); //VF26 -> zero result
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}
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