Steve2/A2Mac/instructions/6502_instr_branch.h

//
//  main.c
//  6502
//
//  Created by Tamas Rudnai on 7/14/19.
//  Copyright © 2019 GameAlloy. All rights reserved.
//

#ifndef __6502_INSTR_BRANCH_H__
#define __6502_INSTR_BRANCH_H__

static inline void BR( int8_t reladdr ) {
    m6502.pc += reladdr;
}

/**
 BCC  Branch on Carry Clear
 
 branch on C = 0                  N Z C I D V
 - - - - - -
 
 addressing    assembler    opc  bytes  cyles
 --------------------------------------------
 relative      BCC oper      90    2     2**
 **/
static inline void BCC( int8_t reladdr ) {
    dbgPrintf("BCC ");
    if ( m6502.flags.C == 0 )
        BR( reladdr );
}

/**
 BCS  Branch on Carry Set
 
 branch on C = 1                  N Z C I D V
 - - - - - -
 
 addressing    assembler    opc  bytes  cyles
 --------------------------------------------
 relative      BCS oper      B0    2     2**
 **/
static inline void BCS( int8_t reladdr ) {
    dbgPrintf("BCS ");
    if ( m6502.flags.C == 1 )
        BR( reladdr );
}

/**
 BNE  Branch on Result not Zero
 
 branch on Z = 0                  N Z C I D V
 - - - - - -
 
 addressing    assembler    opc  bytes  cyles
 --------------------------------------------
 relative      BNE oper      D0    2     2**
 **/
static inline void BNE( int8_t reladdr ) {
    dbgPrintf("BNE ");
    if ( m6502.flags.Z == 0 )
        BR( reladdr );
}

/**
 BEQ  Branch on Result Zero
 
 branch on Z = 1                  N Z C I D V
 - - - - - -
 
 addressing    assembler    opc  bytes  cyles
 --------------------------------------------
 relative      BEQ oper      F0    2     2**
 **/
static inline void BEQ( int8_t reladdr ) {
    dbgPrintf("BEQ ");
    if ( m6502.flags.Z == 1 )
        BR( reladdr );
}

/**
 BPL  Branch on Result Plus
 
 branch on N = 0                  N Z C I D V
 - - - - - -
 
 addressing    assembler    opc  bytes  cyles
 --------------------------------------------
 relative      BPL oper      10    2     2**
 **/
static inline void BPL( int8_t reladdr ) {
    dbgPrintf("BPL ");
    if ( m6502.flags.N == 0 )
        BR( reladdr );
}

/**
 BMI  Branch on Result Minus
 
 branch on N = 1                  N Z C I D V
 - - - - - -
 
 addressing    assembler    opc  bytes  cyles
 --------------------------------------------
 relative      BMI oper      30    2     2**
 **/
static inline void BMI( int8_t reladdr ) {
    dbgPrintf("BMI ");
    if ( m6502.flags.N == 1 )
        BR( reladdr );
}

/**
 BVC  Branch on Overflow Clear
 
 branch on V = 0                  N Z C I D V
 - - - - - -
 
 addressing    assembler    opc  bytes  cyles
 --------------------------------------------
 relative      BVC oper      50    2     2**
 **/
static inline void BVC( int8_t reladdr ) {
    dbgPrintf("BVC ");
    if ( m6502.flags.V == 0 )
        BR( reladdr );
}

/**
 BVS  Branch on Overflow Set
 
 branch on V = 1                  N Z C I D V
 - - - - - -
 
 addressing    assembler    opc  bytes  cyles
 --------------------------------------------
 relative      BVC oper      70    2     2**
 **/
static inline void BVS( int8_t reladdr ) {
    dbgPrintf("BVS ");
    if ( m6502.flags.V == 1 )
        BR( reladdr );
}

#endif // __6502_INSTR_BRANCH_H__