Amneesh Singh
1c96f418eb
So, I ended up moving exec methods from Instruction to Cpu for encapsulating cycle emulation, and this has caused me lots of pain since I had to rewrite a shit ton of tests which are not even useful or comprehensible, i do no know why i put myself through this Signed-off-by: Amneesh Singh <natto@weirdnatto.in>
72 lines
1.6 KiB
C++
72 lines
1.6 KiB
C++
#include "cpu/cpu.hh"
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using namespace matar;
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class CpuFixture {
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public:
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CpuFixture()
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: bus(Bus::init(std::array<uint8_t, Bus::BIOS_SIZE>(),
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std::vector<uint8_t>(Header::HEADER_SIZE)))
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, cpu(bus) {}
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protected:
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void exec(arm::InstructionData data, Condition condition = Condition::AL) {
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// hack to account for one fetch cycle
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bus->internal_cycle();
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arm::Instruction instruction(condition, data);
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cpu.exec(instruction);
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}
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void exec(thumb::InstructionData data) {
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// hack to account for one fetch cycle
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bus->internal_cycle();
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thumb::Instruction instruction(data);
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cpu.exec(instruction);
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}
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void reset(uint32_t value = 0) { setr(15, value + 8); }
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uint32_t getr(uint8_t r) {
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uint32_t pc = 0;
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if (r != 15)
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pc = getr_(15, cpu);
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uint32_t ret = getr_(r, cpu);
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if (r == 15)
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pc = ret;
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// undo PC advance
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setr_(15, pc, cpu);
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return ret;
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}
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void setr(uint8_t r, uint32_t value) {
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uint32_t pc = getr_(15, cpu);
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setr_(r, value, cpu);
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// undo PC advance when r != 15
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// when r is 15, setr_ takes account of pipeline flush
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if (r != 15)
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setr_(15, pc, cpu);
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}
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Psr psr(bool spsr = false);
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void set_psr(Psr psr, bool spsr = false);
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std::shared_ptr<Bus> bus;
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Cpu cpu;
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private:
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// hack to get a register
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uint32_t getr_(uint8_t r, Cpu tmp);
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// hack to set a register
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void setr_(uint8_t r, uint32_t value, Cpu& cpu);
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};
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