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1. SASM Flags Manipulation

File: sasm_flags.h
Author: Soham Metha
Date: January 2025

1.1. Table of Contents

1.2. Flags Enum

The Flags enumeration defines individual CPU flag bit masks, allowing manipulation of specific flags using bitwise operations.

Flag Bit Mask Description
Halt 1 << 0 Halt flag
Sign 1 << 1 Sign flag
Overflow 1 << 2 Overflow flag
Carry 1 << 3 Carry flag
Borrow 1 << 4 Borrow flag
Parity 1 << 5 Parity flag
Zero 1 << 6 Zero flag

1.3. Flag Manipulation Functions

1.3.1. Halt Flag

  • Set Halt Flag

    void setHalt(CPU* cpu, bool halt);

    Sets the Halt flag in the CPU structure based on the given halt value.

  • Get Halt Flag 

    bool getHalt(const CPU* cpu);
    Returns the current state of the Halt flag.

1.3.2. Sign Flag

  • Set Sign Flag

    void setSign(CPU* cpu, bool sign);

    Sets the Sign flag in the CPU structure based on the given sign value.

  • Get Sign Flag 

    bool getSign(const CPU* cpu);
    Returns the current state of the Sign flag.

1.3.3. Overflow Flag

  • Set Overflow Flag

    void setOverflow(CPU* cpu, bool overflow);

    Sets the Overflow flag in the CPU structure based on the given overflow value.

  • Get Overflow Flag 

    bool getOverflow(const CPU* cpu);
    Returns the current state of the Overflow flag.

1.3.4. Carry Flag

  • Set Carry Flag

    void setCarry(CPU* cpu, bool carry);

    Sets the Carry flag in the CPU structure based on the given carry value.

  • Get Carry Flag 

    bool getCarry(const CPU* cpu);
    Returns the current state of the Carry flag.

1.3.5. Borrow Flag

  • Set Borrow Flag

    void setBorrow(CPU* cpu, bool borrow);

    Sets the Borrow flag in the CPU structure based on the given borrow value.

  • Get Borrow Flag 

    bool getBorrow(const CPU* cpu);
    Returns the current state of the Borrow flag.

1.3.6. Parity Flag

  • Set Parity Flag

    void setParity(CPU* cpu, bool parity);

    Sets the Parity flag in the CPU structure based on the given parity value.

  • Get Parity Flag 

    bool getParity(const CPU* cpu);
    Returns the current state of the Parity flag.

1.3.7. Zero Flag

  • Set Zero Flag

    void setZero(CPU* cpu, bool zero);

    Sets the Zero flag in the CPU structure based on the given zero value.

  • Get Zero Flag 

    bool getZero(const CPU* cpu);
    Returns the current state of the Zero flag.