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+/*
+
+ z80 - Z80 emulation
+
+ Copyright (C) 2021 Ian Cowburn (ianc@noddybox.co.uk)
+
+ 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 3 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, see <http://www.gnu.org/licenses/>
+
+ -------------------------------------------------------------------------
+
+ $Id: z80_private.h 13 2006-10-12 16:38:57Z ianc $
+
+ Private macros for Z80
+
+*/
+
+#ifndef Z80_PRIVATE_H
+#define Z80_PRIVATE_H "$Id: z80_private.h 13 2006-10-12 16:38:57Z ianc $"
+
+#include "z80_config.h"
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+#define MAX_PER_CALLBACK 10
+
+
+/* ---------------------------------------- TYPES
+*/
+
+struct Z80Private
+{
+ Z80Val cycle;
+
+ int halt;
+
+ Z80Byte shift;
+
+ int raise;
+ Z80Byte devbyte;
+ int nmi;
+
+#ifndef ENABLE_ARRAY_MEMORY
+ Z80ReadMemory disread;
+
+ Z80ReadMemory mread;
+ Z80WriteMemory mwrite;
+#endif
+
+ Z80ReadPort pread;
+ Z80WritePort pwrite;
+
+ Z80Callback callback[eZ80_NO_CALLBACK][MAX_PER_CALLBACK];
+
+ int last_cb;
+};
+
+#define PRIV cpu->priv
+
+
+/* ---------------------------------------- ARRAY MEMORY
+*/
+
+#ifdef ENABLE_ARRAY_MEMORY
+extern Z80Byte Z80_MEMORY[];
+#endif
+
+
+/* ---------------------------------------- MACROS
+*/
+
+/* NOTE: A lot of these macros assume you have a variable called 'cpu'
+ which is a pointer to Z80
+*/
+
+
+/* Invoke a callback class
+*/
+#define CALLBACK(r,d) do \
+ { \
+ int f; \
+ \
+ for(f=0;f<MAX_PER_CALLBACK;f++) \
+ if (PRIV->callback[r][f]) \
+ PRIV->last_cb &= \
+ PRIV->callback[r][f](cpu,d);\
+ } while(0)
+
+/* Flag register
+*/
+#define C_Z80 0x01
+#define N_Z80 0x02
+#define P_Z80 0x04
+#define V_Z80 P_Z80
+#define H_Z80 0x10
+#define Z_Z80 0x40
+#define S_Z80 0x80
+
+#define B3_Z80 0x08
+#define B5_Z80 0x20
+
+
+#define SET(v,b) (v)|=b
+#define CLR(v,b) (v)&=~(b)
+
+#define SETFLAG(f) SET(cpu->AF.b[LO],f)
+#define CLRFLAG(f) CLR(cpu->AF.b[LO],f)
+
+#ifdef ENABLE_ARRAY_MEMORY
+
+#define PEEK(addr) Z80_MEMORY[addr]
+
+static inline Z80Word PEEKW(Z80Word addr)
+{
+ return (PEEK(addr) | (Z80Word)PEEK(addr+1)<<8);
+}
+
+#define POKE(addr,val) do \
+ { \
+ Z80Word ba=addr; \
+ if (ba>=RAMBOT && ba<=RAMTOP) \
+ Z80_MEMORY[ba]=val; \
+ } while(0)
+
+#define POKEW(addr,val) do \
+ { \
+ Z80Word wa=addr; \
+ Z80Word wv=val; \
+ POKE(wa,wv); \
+ POKE(wa+1,wv>>8); \
+ } while(0)
+
+
+#define FETCH_BYTE (Z80_MEMORY[cpu->PC++])
+#define FETCH_WORD (cpu->PC+=2, \
+ Z80_MEMORY[cpu->PC-2]| \
+ ((Z80Word)Z80_MEMORY[cpu->PC-1]<<8))
+
+#else
+
+#define PEEK(addr) (PRIV->mread(cpu,addr))
+#define PEEKW(addr) FPEEKW(cpu,addr)
+
+#define POKE(addr,val) PRIV->mwrite(cpu,addr,val)
+#define POKEW(addr,val) FPOKEW(cpu,addr,val)
+
+#define FETCH_BYTE (PRIV->mread(cpu,cpu->PC++))
+#define FETCH_WORD (cpu->PC+=2,FPEEKW(cpu,cpu->PC-2))
+
+#endif
+
+
+#define IS_C (cpu->AF.b[LO]&C_Z80)
+#define IS_N (cpu->AF.b[LO]&N_Z80)
+#define IS_P (cpu->AF.b[LO]&P_Z80)
+#define IS_H (cpu->AF.b[LO]&H_Z80)
+#define IS_Z (cpu->AF.b[LO]&Z_Z80)
+#define IS_S (cpu->AF.b[LO]&S_Z80)
+
+#define CARRY IS_C
+
+#define IS_IX_IY (PRIV->shift==0xdd || PRIV->shift==0xfd)
+#define OFFSET(off) off=(IS_IX_IY ? (Z80Relative)FETCH_BYTE:0)
+
+#define TSTATE(n) PRIV->cycle+=n
+
+#define ADD_R(v) cpu->R=((cpu->R&0x80)|((cpu->R+(v))&0x7f))
+#define INC_R ADD_R(1)
+
+#ifdef ENABLE_ARRAY_MEMORY
+
+#define PUSH(REG) do \
+ { \
+ Z80Word pv=REG; \
+ cpu->SP-=2; \
+ POKE(cpu->SP,pv); \
+ POKE(cpu->SP+1,pv>>8); \
+ } while(0)
+
+#else
+
+#define PUSH(REG) do \
+ { \
+ Z80Word pushv=REG; \
+ cpu->SP-=2; \
+ PRIV->mwrite(cpu,cpu->SP,pushv); \
+ PRIV->mwrite(cpu,cpu->SP+1,pushv>>8);\
+ } while(0)
+#endif
+
+#define POP(REG) do \
+ { \
+ REG=PEEK(cpu->SP) | \
+ (Z80Word)PEEK(cpu->SP+1)<<8; \
+ cpu->SP+=2; \
+ } while(0)
+
+#define SETHIDDEN(res) cpu->AF.b[LO]=(cpu->AF.b[LO]&~(B3_Z80|B5_Z80))|\
+ ((res)&(B3_Z80|B5_Z80))
+
+#define CALL do \
+ { \
+ PUSH(cpu->PC+2); \
+ cpu->PC=PEEKW(cpu->PC); \
+ } while(0)
+
+#define NOCALL cpu->PC+=2
+#define JP cpu->PC=PEEKW(cpu->PC)
+#define NOJP cpu->PC+=2
+#define JR cpu->PC+=(Z80Relative)PEEK(cpu->PC)+1
+#define NOJR cpu->PC++
+
+#define OUT(P,V) do \
+ { \
+ if (PRIV->pwrite) \
+ PRIV->pwrite(cpu,P,V); \
+ } while(0)
+
+#define IN(P) (PRIV->pread?PRIV->pread(cpu,P):0)
+
+
+
+/* ---------------------------------------- LABELS
+*/
+extern Z80Label *z80_labels;
+
+
+/* ---------------------------------------- GLOBAL GENERAL OPCODES/ROUTINES
+*/
+void Z80_Decode(Z80 *cpu, Z80Byte opcode);
+void Z80_InitialiseInternals(void);
+
+
+/* ---------------------------------------- DISASSEMBLY
+*/
+#ifdef ENABLE_DISASSEM
+typedef void (*DIS_OP_CALLBACK)(Z80 *z80, Z80Byte op, Z80Word *pc);
+
+extern DIS_OP_CALLBACK dis_CB_opcode[];
+extern DIS_OP_CALLBACK dis_DD_opcode[];
+extern DIS_OP_CALLBACK dis_DD_CB_opcode[];
+extern DIS_OP_CALLBACK dis_ED_opcode[];
+extern DIS_OP_CALLBACK dis_FD_opcode[];
+extern DIS_OP_CALLBACK dis_FD_CB_opcode[];
+extern DIS_OP_CALLBACK dis_opcode_z80[];
+
+const char *Z80_Dis_Printf(const char *format, ...);
+
+Z80Byte Z80_Dis_FetchByte(Z80 *cpu, Z80Word *pc);
+Z80Word Z80_Dis_FetchWord(Z80 *cpu, Z80Word *pc);
+
+void Z80_Dis_Set(const char *op, const char *arg);
+const char *Z80_Dis_GetOp(void);
+const char *Z80_Dis_GetArg(void);
+#endif /* ENABLE_DISASSEM */
+
+#endif /* Z80_PRIVATE_H */
+
+/* END OF FILE */