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kolibrios/programs/emulator/e80/trunk/z80/macros.c
Yogev Ezra b2ba8d7766 Add emulators: 'DosBox' (binary only), 'e80', 'fceu' (binary only). 
git-svn-id: svn://kolibrios.org@1814 a494cfbc-eb01-0410-851d-a64ba20cac60
2011-01-30 14:48:24 +00:00

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/*=====================================================================
Macros.c -> Macros used on the opcode execution.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Copyright (c) 2000 Santiago Romero Iglesias.
Email: sromero@escomposlinux.org
======================================================================*/
/* defines for the registers: faster access to them when coding... */
#define r_PC regs->PC.W
#define r_PCl regs->PC.B.l
#define r_PCh regs->PC.B.h
#define r_SP regs->SP.W
#define r_IFF1 regs->IFF1
#define r_IFF2 regs->IFF2
#define r_R regs->R.W
#define r_AF regs->AF.W
#define r_A regs->AF.B.h
#define r_F regs->AF.B.l
#define r_BC regs->BC.W
#define r_B regs->BC.B.h
#define r_C regs->BC.B.l
#define r_DE regs->DE.W
#define r_D regs->DE.B.h
#define r_E regs->DE.B.l
#define r_HL regs->HL.W
#define r_H regs->HL.B.h
#define r_L regs->HL.B.l
#define r_IX regs->IX.W
#define r_IXh regs->IX.B.h
#define r_IXl regs->IX.B.l
#define r_IY regs->IY.W
#define r_IYh regs->IY.B.h
#define r_IYl regs->IY.B.l
#define r_AFs regs->AFs.W
#define r_As regs->AFs.B.h
#define r_Fs regs->AFs.B.l
#define r_BCs regs->BCs.W
#define r_Bs regs->BCs.B.h
#define r_Cs regs->BCs.B.l
#define r_DEs regs->DEs.W
#define r_Ds regs->DEs.B.h
#define r_Es regs->DEs.B.l
#define r_HLs regs->HLs.W
#define r_Hs regs->HLs.B.h
#define r_Ls regs->HLs.B.l
#define r_IXs regs->IX.W
#define r_IXhs regs->IX.B.h
#define r_IXls regs->IX.B.l
#define r_IYs regs->IY.W
#define r_IYhs regs->IY.B.h
#define r_IYls regs->IY.B.l
#define r_op ops.W
#define r_oph ops.B.h
#define r_opl ops.B.l
#define r_tmp tmpreg2.W
#define r_tmph tmpreg2.B.h
#define r_tmpl tmpreg2.B.l
#define r_mem mread.W
#define r_memh mread.B.h
#define r_meml mread.B.l
#ifndef _DISASM_
/*--- Flag tables by Philip Kendall, taken from it's fuse emulator -*/
/*--- I was having headache trying to emulate correctly the FLAGS,
so I finished using the FLAG tables used by P. Kendall. ------*/
#define FLAG_C 0x01
#define FLAG_N 0x02
#define FLAG_P 0x04
#define FLAG_V FLAG_P
#define FLAG_3 0x08
#define FLAG_H 0x10
#define FLAG_5 0x20
#define FLAG_Z 0x40
#define FLAG_S 0x80
/* Whether a half carry occured or not can be determined by looking at
the 3rd bit of the two arguments and the result; these are hashed
into this table in the form r12, where r is the 3rd bit of the
result, 1 is the 3rd bit of the 1st argument and 2 is the
third bit of the 2nd argument; the tables differ for add and subtract
operations */
/* Whether a half carry occured or not can be determined by looking at
the 3rd bit of the two arguments and the result; these are hashed
into this table in the form r12, where r is the 3rd bit of the
result, 1 is the 3rd bit of the 1st argument and 2 is the
third bit of the 2nd argument; the tables differ for add and subtract
operations */
byte halfcarry_add_table[] = { 0, FLAG_H, FLAG_H, FLAG_H, 0, 0, 0, FLAG_H };
byte halfcarry_sub_table[] = { 0, 0, FLAG_H, 0, FLAG_H, 0, FLAG_H, FLAG_H };
/* Similarly, overflow can be determined by looking at the 7th bits; again
the hash into this table is r12 */
byte overflow_add_table[] = { 0, 0, 0, FLAG_V, FLAG_V, 0, 0, 0 };
byte overflow_sub_table[] = { 0, FLAG_V, 0, 0, 0, 0, FLAG_V, 0 };
/* Some more tables; initialised in z80_init_tables() */
byte sz53_table[0x100]; /* The S, Z, 5 and 3 bits of the temp value */
byte parity_table[0x100]; /* The parity of the temp value */
byte sz53p_table[0x100]; /* OR the above two tables together */
/*------------------------------------------------------------------*/
// Contributed by Metalbrain to implement OUTI, etc.
byte ioblock_inc1_table[64];
byte ioblock_dec1_table[64];
byte ioblock_2_table[0x100];
/*--- Memory Write on the A address on no bank machines -------------*/
void Z80WriteMem( word where, word A, Z80Regs *regs)
{
if( where >= 16384 )
regs->RAM[where] = A;
}
#endif
/*--- Memory Read from the A address on no bank machines -------------*/
#define Z80ReadMem(A) ((regs->RAM[(A)]))
// return( regs->RAM[A] );
/* macros to change the ICount register */
#define AddCycles(n) regs->ICount-=(n)
#define SubCycles(n) regs->ICount+=(n)
//#define AddR(n) r_R = (r_R+(n))
#define AddR(n) r_R = ((r_R & 0x80) | ((r_R+(n)) & 0x7f ))
#define SubR(n) r_R = ((r_R & 0x80) | ((r_R-(n)) & 0x7f ))
/* setting and resetting the flag bits: */
#define SET_FLAG(flag) (r_F |= (flag))
#define RESET_FLAG(flag) (r_F &= ~(flag))
#define TEST_FLAG(flag) (r_F & (flag))
/* store a given register in the stack (hi and lo bytes) */
#define PUSH(rreg) \
Z80WriteMem( --(r_SP), regs->rreg.B.h, regs); \
Z80WriteMem( --(r_SP), regs->rreg.B.l, regs)
#define POP(rreg)\
regs->rreg.B.l = Z80ReadMem(r_SP); r_SP++;\
regs->rreg.B.h = Z80ReadMem(r_SP); r_SP++
#define PUSH_IXYr() \
Z80WriteMem( --(r_SP), REGH, regs); \
Z80WriteMem( --(r_SP), REGL, regs)
#define POP_IXYr()\
REGL = Z80ReadMem(r_SP); r_SP++; \
REGH = Z80ReadMem(r_SP); r_SP++
#define RST(rstval) PUSH(PC); r_PC=(rstval)
/*--- Move data to mem or regs --------------------------------------*/
#define LD_r_r(dreg, sreg) (dreg) = (sreg)
#define STORE_r(daddreg, sreg) Z80WriteMem((daddreg), (sreg), regs)
#define STORE_nn_rr(dreg) \
r_opl = Z80ReadMem(r_PC); r_PC++;\
r_oph = Z80ReadMem(r_PC); r_PC++; \
r_tmp = dreg; \
Z80WriteMem((r_op),r_tmpl, regs); \
Z80WriteMem((r_op+1),r_tmph, regs)
#define STORE_nn_r(sreg) \
r_opl = Z80ReadMem(r_PC); r_PC++; \
r_oph = Z80ReadMem(r_PC); r_PC++; \
Z80WriteMem((r_op),(sreg), regs)
#define LOAD_r(dreg, saddreg) (dreg)=Z80ReadMem((saddreg))
#define LOAD_rr_nn(dreg) r_opl = Z80ReadMem(r_PC); r_PC++; \
r_oph = Z80ReadMem(r_PC); r_PC++; \
r_tmpl = Z80ReadMem(r_op); \
r_tmph = Z80ReadMem((r_op)+1); \
dreg=r_tmp
#define LOAD_r_nn(dreg) r_opl = Z80ReadMem(r_PC); r_PC++; \
r_oph = Z80ReadMem(r_PC); r_PC++; \
dreg = Z80ReadMem(r_op)
#define LD_r_n(reg) (reg) = Z80ReadMem(r_PC++)
#define LD_rr_nn(reg) r_opl = Z80ReadMem(r_PC); r_PC++; \
r_oph = Z80ReadMem(r_PC); r_PC++; \
reg = r_op
#define EX(reg1,reg2) r_opl=(reg1); (reg1)=(reg2); (reg2)=r_opl
#define EX_WORD(reg1,reg2) r_op=(reg1); (reg1)=(reg2); (reg2)=r_op
/*--- Increments/Decrements -----------------------------------------*/
#define INC(reg) (reg)++; \
r_F = ( r_F & FLAG_C ) | ( (reg)==0x80 ? FLAG_V : 0 ) | \
( (reg)&0x0f ? 0 : FLAG_H ) | ( (reg) ? 0 : FLAG_Z ) | \
sz53_table[(reg)]
#define DEC(reg) \
r_F = ( r_F & FLAG_C ) | ( (reg)&0x0f ? 0 : FLAG_H ) | FLAG_N; \
(reg)--; \
r_F |= ( (reg)==0x7f ? FLAG_V : 0 ) | sz53_table[(reg)]
// it was:
// r_F |= ( (reg)==0x79 ? FLAG_V : 0 ) | sz53_table[(reg)]
// But Kak pointed my was not 0x79 -> 0x7F, changed 7-3-2001
/*--- Bit operations ------------------------------------------------*/
#define BIT_RES(b,reg) reg &= ~(0x1<<b)
#define BIT_SET(b,reg) reg |= (0x1<<b)
#define BIT_mem_RES(b,addr) r_opl = Z80ReadMem(addr); \
r_opl &= ~(0x1<<b); \
Z80WriteMem(addr, r_opl, regs)
#define BIT_mem_SET(b,addr) r_opl = Z80ReadMem(addr); \
r_opl |= (0x1<<b); \
Z80WriteMem(addr, r_opl, regs)
#define BIT_RES_mem(b,addr,reg) reg &= ~(0x1<<b); \
Z80WriteMem((addr), (reg), regs)
#define BIT_SET_mem(b,addr,reg) reg |= (0x1<<b); \
Z80WriteMem((addr), (reg), regs)
#define BIT_BIT(b,reg) r_F = ( r_F & FLAG_C ) | \
( (reg) & ( FLAG_3 | FLAG_5 ) ) |\
(((reg) & ( 0x01 << b ) ) ? FLAG_H : \
(FLAG_P|FLAG_H|FLAG_Z ) )
#define BIT_mem_BIT(b,reg) r_opl = Z80ReadMem(reg); \
r_F = ( r_F & FLAG_C ) | \
( (r_opl) & ( FLAG_3 | FLAG_5 ) ) |\
(((r_opl) & ( 0x01 << b ) ) ? FLAG_H : \
(FLAG_P|FLAG_H|FLAG_Z ) )
#define BIT_BIT7(reg) r_F = ( r_F & FLAG_C ) | ( (reg) & \
( FLAG_3 | FLAG_5 ) ) |\
(((reg) & 0x80 ) ? ( FLAG_H | FLAG_S ) :\
( FLAG_P | FLAG_H | FLAG_Z ) )
#define BIT_mem_BIT7(reg) r_opl = Z80ReadMem(reg); \
r_F = ( r_F & FLAG_C ) | ( (r_opl) & \
( FLAG_3 | FLAG_5 ) ) |\
(((r_opl) & 0x80 ) ? ( FLAG_H | FLAG_S ) :\
( FLAG_P | FLAG_H | FLAG_Z ) )
#define RLC(reg) (reg) = ( (reg)<<1 ) | ( (reg)>>7 ); \
r_F = ( (reg) & FLAG_C ) | sz53p_table[(reg)]
#define RRC(reg) r_F = (reg) & FLAG_C; \
(reg) = ( (reg)>>1 ) | ( (reg)<<7 );\
r_F |= sz53p_table[(reg)]
#define RL(reg) r_opl = (reg); \
(reg) = ( (reg)<<1 ) | ( r_F & FLAG_C ); \
r_F = ( r_opl >> 7 ) | sz53p_table[(reg)]
#define RR(reg) r_opl = (reg); \
(reg) = ( (reg)>>1 ) | ( r_F << 7 );\
r_F = ( r_opl & FLAG_C ) | sz53p_table[(reg)]
#define SLA(reg) r_F = (reg) >> 7;\
(reg) <<= 1;\
r_F |= sz53p_table[(reg)]
#define SRA(reg) r_F = (reg) & FLAG_C; \
(reg) = ( (reg) & 0x80 ) | ( (reg) >> 1 );\
r_F |= sz53p_table[(reg)]
#define SLL(reg) r_F = (reg) >> 7;\
(reg) = ( (reg) << 1 ) | 0x01;\
r_F |= sz53p_table[(reg)]
#define SRL(reg) r_F = (reg) & FLAG_C;\
(reg) >>= 1;\
r_F |= sz53p_table[(reg)]
/*--- JP operations -------------------------------------------------*/
#define JP_nn() r_opl = Z80ReadMem(r_PC); \
r_PC++; \
r_oph = Z80ReadMem(r_PC); \
r_PC = r_op
#define JR_n() r_PC += (offset) (Z80ReadMem(r_PC)); r_PC++
#define RET_nn() r_PCl = Z80ReadMem (r_SP); r_SP++; \
r_PCh = Z80ReadMem (r_SP); r_SP++;
#define CALL_nn() r_opl = Z80ReadMem (r_PC); r_PC++; \
r_oph = Z80ReadMem (r_PC); r_PC++; \
Z80WriteMem( --(r_SP), r_PCh, regs ); \
Z80WriteMem( --(r_SP), r_PCl, regs ); \
r_PC = r_op
/*--- ALU operations ------------------------------------------------*/
#define AND(reg) r_A &= (reg); \
r_F = FLAG_H | sz53p_table[r_A]
#define OR(reg) r_A |= (reg); \
r_F = sz53p_table[r_A]
#define XOR(reg) r_A ^= (reg); \
r_F = sz53p_table[r_A]
#define AND_mem(raddress) r_opl = Z80ReadMem(raddress); \
r_A &= (r_opl); \
r_F = FLAG_H | sz53p_table[r_A]
#define OR_mem(raddress) r_opl = Z80ReadMem(raddress); \
r_A |= (r_opl); \
r_F = sz53p_table[r_A]
#define XOR_mem(raddress) r_opl = Z80ReadMem(raddress); \
r_A ^= (r_opl); \
r_F = sz53p_table[r_A]
#define ADD(val) tempword = r_A + (val); \
r_oph = ((r_A&0x88)>>3)|(((val)&0x88)>>2) | \
( (tempword & 0x88) >> 1 ); \
r_A = tempword; \
r_F = ( tempword & 0x100 ? FLAG_C : 0 ) | \
halfcarry_add_table[ r_oph & 0x07] | \
overflow_add_table[ r_oph >> 4] | \
sz53_table[r_A]
#define ADD_WORD(value1,value2) \
tempdword = (value1) + (value2); \
r_oph = ( ( (value1) & 0x0800 ) >> 11 ) | \
( ( (value2) & 0x0800 ) >> 10 ) | \
( ( tempdword & 0x0800 ) >> 9 ); \
(value1) = tempdword; \
r_F = ( r_F & ( FLAG_V | FLAG_Z | FLAG_S ) ) | \
( tempdword & 0x10000 ? FLAG_C : 0 ) | \
(( tempdword >> 8 ) & ( FLAG_3 | FLAG_5 ) ) | \
halfcarry_add_table[r_oph]
#define ADC(value) \
tempword = r_A + (value) + ( r_F & FLAG_C ); \
r_oph = ( (r_A & 0x88) >> 3 ) | ( ( (value) & 0x88 ) >> 2 ) |\
( (tempword & 0x88) >> 1 ); \
r_A = tempword; \
r_F = ( tempword & 0x100 ? FLAG_C : 0 ) | \
halfcarry_add_table[r_oph & 0x07] | \
overflow_add_table[r_oph >> 4] | \
sz53_table[r_A]
#define ADC_WORD(value) \
tempdword= r_HL + (value) + ( r_F & FLAG_C ); \
r_oph = ( ( r_HL & 0x8800 ) >> 11 ) | \
( ( (value) & 0x8800 ) >> 10 ) | \
( ( tempdword & 0x8800 ) >> 9 ); \
r_HL = tempdword; \
r_F = ( tempdword & 0x10000 ? FLAG_C : 0 )| \
overflow_add_table[r_oph >> 4] | \
( r_H & ( FLAG_3 | FLAG_5 | FLAG_S ) ) | \
halfcarry_add_table[ r_oph & 0x0f ]| \
( r_HL ? 0 : FLAG_Z )
#define SUB(value) \
tempword = r_A - (value);\
r_opl = ( (r_A & 0x88) >> 3 ) | \
( ( (value) & 0x88 ) >> 2 ) | \
( (tempword & 0x88) >> 1 ); \
r_A = tempword; \
r_F = ( tempword & 0x100 ? FLAG_C : 0 ) | FLAG_N | \
halfcarry_sub_table[r_opl & 0x07] | \
overflow_sub_table[r_opl >> 4] | \
sz53_table[r_A]
#define SBC(value) \
tempword = r_A - (value) - ( r_F & FLAG_C ); \
r_opl = ( (r_A & 0x88) >> 3 ) | \
( ( (value) & 0x88 ) >> 2 ) | \
( (tempword & 0x88) >> 1 ); \
r_A = tempword; \
r_F = ( tempword & 0x100 ? FLAG_C : 0 ) | FLAG_N | \
halfcarry_sub_table[r_opl & 0x07] | \
overflow_sub_table[r_opl >> 4] | \
sz53_table[r_A]
#define SBC_WORD(Rg) \
tempword=r_F & C_FLAG; r_op=(r_HL-Rg-tempword)&0xFFFF; \
r_F= \
N_FLAG| \
(((long)r_HL-(long)Rg-(long)tempword)&0x10000? C_FLAG:0)| \
((r_HL^Rg)&(r_HL^r_op)&0x8000? O_FLAG:0)| \
((r_HL^Rg^r_op)&0x1000? H_FLAG:0)| \
(r_op? 0:Z_FLAG)|(r_oph&S_FLAG); \
r_HL=r_op
#define CP(value) \
tempword = r_A - (value);\
r_opl = ( (r_A & 0x88) >> 3 ) | ( ( (value) & 0x88 ) >> 2 ) | \
( (tempword & 0x88) >> 1 ); \
r_F = ( tempword & 0x100 ? FLAG_C : ( tempword ? 0 : FLAG_Z ) ) | FLAG_N |\
halfcarry_sub_table[r_opl & 0x07] | \
overflow_sub_table[r_opl >> 4] | \
( value & ( FLAG_3 | FLAG_5 ) ) | \
( tempword & FLAG_S )
#define NEG_A() r_opl = r_A; r_A=0; SUB(r_opl)
/*--- MISC operations -----------------------------------------------*/
#define IN(reg,port) (reg)=Z80InPort((port)); \
r_F = ( r_F & FLAG_C) | sz53p_table[(reg)]
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