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- Speed optimizations

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- Carry Flag bugfix
This commit is contained in:
Tamas Rudnai 2019-09-12 00:30:22 -07:00
parent 08327ef0a4
commit f2e5b49a6e
5 changed files with 13 additions and 9 deletions
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4
A2Mac/common.h
View File

@ -56,7 +56,7 @@ static inline void set_flags_Z( const uint8_t test ) {
dbgPrintf("%c", m6502.flags.Z ? 'Z' : 'z'); dbgPrintf("%c", m6502.flags.Z ? 'Z' : 'z');
} }
static inline void set_flags_C( const int test ) { static inline void set_flags_C( const int16_t test ) {
m6502.flags.C = test >= 0; m6502.flags.C = test >= 0;
dbgPrintf("%c", m6502.flags.C ? 'C' : 'c'); dbgPrintf("%c", m6502.flags.C ? 'C' : 'c');
} }
@ -76,7 +76,7 @@ static inline void set_flags_NVZ( const uint8_t test ) {
set_flags_V(test); set_flags_V(test);
} }
static inline void set_flags_NZC( const int test ) { static inline void set_flags_NZC( const int16_t test ) {
set_flags_NZ(test); set_flags_NZ(test);
set_flags_C(test); set_flags_C(test);
} }

6
A2Mac/instructions/6502_instr_arithmetic.h
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@ -31,7 +31,11 @@
**/ **/
static inline void ADC( uint8_t imm ) { static inline void ADC( uint8_t imm ) {
dbgPrintf("ADC(%02X) A:%02X + %02X ", imm, m6502.A, imm); dbgPrintf("ADC(%02X) A:%02X + %02X ", imm, m6502.A, imm);
set_flags_NZCV( m6502.A += imm + m6502.flags.C );
int16_t tmp;
set_flags_NVZ( m6502.A = tmp = (int16_t)m6502.A + imm + m6502.flags.C );
m6502.flags.C = tmp > 0xFF;
dbgPrintf("-> A:%02X ", m6502.A); dbgPrintf("-> A:%02X ", m6502.A);
} }

6
A2Mac/instructions/6502_instr_compare_test.h
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@ -49,7 +49,7 @@ static inline void BIT( uint8_t imm ) {
**/ **/
static inline void CMP( uint8_t imm ) { static inline void CMP( uint8_t imm ) {
dbgPrintf("CMP(%02X) ", imm); dbgPrintf("CMP(%02X) ", imm);
set_flags_NZC( (int)m6502.A - imm ); set_flags_NZC( (int16_t)m6502.A - imm );
} }
/** /**
@ -66,7 +66,7 @@ static inline void CMP( uint8_t imm ) {
**/ **/
static inline void CPX( uint8_t imm ) { static inline void CPX( uint8_t imm ) {
dbgPrintf("CPX(%02X) ", imm); dbgPrintf("CPX(%02X) ", imm);
set_flags_NZC( (int)m6502.X - imm ); set_flags_NZC( (int16_t)m6502.X - imm );
} }
/** /**
@ -83,7 +83,7 @@ static inline void CPX( uint8_t imm ) {
**/ **/
static inline void CPY( uint8_t imm ) { static inline void CPY( uint8_t imm ) {
dbgPrintf("CPY(%02X) ", imm); dbgPrintf("CPY(%02X) ", imm);
set_flags_NZC( (int)m6502.Y - imm ); set_flags_NZC( (int16_t)m6502.Y - imm );
} }
#endif // __6502_INSTR_COMPARE_TEST_H__ #endif // __6502_INSTR_COMPARE_TEST_H__

4
A2Mac/instructions/6502_instr_inc_dec.h
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@ -33,7 +33,7 @@ static inline void INC( uint8_t * dst ) {
INX Increment Index X by One INX Increment Index X by One
X + 1 -> X N Z C I D V X + 1 -> X N Z C I D V
+ + - - - - + + - - - -
addressing assembler opc bytes cyles addressing assembler opc bytes cyles
-------------------------------------------- --------------------------------------------
@ -49,7 +49,7 @@ static inline void INX() {
INY Increment Index Y by One INY Increment Index Y by One
Y + 1 -> Y N Z C I D V Y + 1 -> Y N Z C I D V
+ + - - - - + + - - - -
addressing assembler opc bytes cyles addressing assembler opc bytes cyles
-------------------------------------------- --------------------------------------------

2
A2Mac/instructions/6502_instr_misc.h
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@ -28,7 +28,7 @@ static inline void BRK() {
NOP No Operation NOP No Operation
--- N Z C I D V --- N Z C I D V
- - - - - - - - - - - -
addressing assembler opc bytes cyles addressing assembler opc bytes cyles
-------------------------------------------- --------------------------------------------