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80 lines
1.3 KiB
C
80 lines
1.3 KiB
C
//
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// common.h
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// 6502
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//
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// Created by Tamas Rudnai on 7/14/19.
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// Copyright © 2019 GameAlloy. All rights reserved.
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//
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#ifndef __COMMON_H__
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#define __COMMON_H__
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#include "6502.h"
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#define K 1000ULL
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#define M (K * K)
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#define G (M * K)
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#define T (G * K)
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#define KB 1024ULL
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#define MB (KB * KB)
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#define GB (MB * KB)
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#define TB (GB * KB)
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typedef
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union {
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uint8_t bits;
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struct {
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uint8_t b0:1;
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uint8_t b1:1;
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uint8_t b2:1;
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uint8_t b3:1;
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uint8_t b4:1;
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uint8_t b5:1;
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uint8_t b6:1;
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uint8_t b7:1;
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};
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} bits_t;
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#define BITTEST(n,x) ((bits_t)(n)).b##x
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static inline void set_flags_N( uint8_t test ) {
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m6502.flags.N = BITTEST(test, 7);
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}
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static inline void set_flags_V( uint8_t test ) {
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m6502.flags.V = BITTEST(test, 6);
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}
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static inline void set_flags_Z( uint8_t test ) {
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m6502.flags.Z = test == 0;
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}
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static inline void set_flags_NZ( uint8_t test ) {
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set_flags_N(test);
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set_flags_Z(test);
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}
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static inline void set_flags_NVZ( uint8_t test ) {
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set_flags_NZ(test);
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set_flags_V(test);
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}
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static inline void set_flags_NZC( int test ) {
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set_flags_NZ(test);
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m6502.flags.C = (unsigned)test > 0xFF;
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}
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static inline void set_flags_NZCV( int test ) {
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set_flags_NZC(test);
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set_flags_V(test);
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}
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#endif // __COMMON_H__
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