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Finishing Program Flow Operations

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This commit is contained in:
Melefo
2020-02-24 19:06:35 +01:00
parent 92d8e97fa5
commit e9a7b9e8d7
7 changed files with 278 additions and 41 deletions
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sources/APU/APU.hpp
+24 -8
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@@ -161,10 +161,16 @@ namespace ComSquare::APU
//! @brief Keep the number of excess cycles executed to pad the next update
unsigned int _paddingCycles = 0;
//! @brief Get value of the Pointer Counter
uint8_t _getDirectValue();
//! @brief Get direct page offset
uint24_t _getDirectAddr();
//! @brief Get direct page offset and add to it the X Index Flag
uint24_t _getDirectAddrByX();
//! @brief Get absolute direct page offset
uint24_t _getAbsoluteAddr();
//! @brief Get absolute direct page offset nd add to it the X Index Flag
uint24_t _getAbsoluteAddrByX();
//! @brief Get absolute offset and separate its bits
std::pair<uint24_t, uint24_t> _getAbsoluteBit();
@@ -235,22 +241,32 @@ namespace ComSquare::APU
//! @brief Branch Always, go to the specified location from the next instruction.
int BRA();
//! @brief Branch if Zero Flag is set
//! @brief Branch if Zero Flag is set.
int BEQ();
//! @brief Branch if Zero Flag is clear
//! @brief Branch if Zero Flag is clear.
int BNE();
//! @brief Branch if Carry Flag is set
//! @brief Branch if Carry Flag is set.
int BCS();
//! @brief Branch if Carry Flag is clear
//! @brief Branch if Carry Flag is clear.
int BCC();
//! @brief Branch if Overflow Flag is set
//! @brief Branch if Overflow Flag is set.
int BVS();
//! @brief Branch if Overflow Flag is set
//! @brief Branch if Overflow Flag is set.
int BVC();
//! @brief Branch if Negative Flag is set
//! @brief Branch if Negative Flag is set.
int BMI();
//! @brief Branch if Negative Flag is clear
//! @brief Branch if Negative Flag is clear.
int BPL();
//! @brief Branch if the specified is set in the address, go to the specified location from the next instruction.
int BBS(uint24_t addr, uint8_t bit);
//! @brief Branch if the specified is clear in the address, go to the specified location from the next instruction.
int BBC(uint24_t addr, uint8_t bit);
//! @brief Branch if the value at the specified address is not equal to the Accumulator Flag.
int CBNE(uint24_t addr, bool by_x = false);
//! @brief Decrement a value then branch to the specified location if the value is not zero.
int DBNZ(bool direct_addr = false);
//! @brief Jump to the specified location.
int JMP(uint24_t addr, bool by_x = false);
public:
explicit APU(std::shared_ptr<MemoryMap> &map);
APU(const APU &) = default;