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Changed Z80 cycle table definitions to be per-device. Removed

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old set_info constants for the tables; they are now set up via
the z80_set_cycle_tables function.
This commit is contained in:
Aaron Giles 2009-04-04 22:43:56 +00:00
parent b09944610a
commit 09aefa1379
2 changed files with 48 additions and 61 deletions
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87
src/emu/cpu/z80/z80.c
View File

@ -120,22 +120,28 @@
typedef struct _z80_state z80_state;
struct _z80_state
{
PAIR prvpc,pc,sp,af,bc,de,hl,ix,iy,memptr;
PAIR af2,bc2,de2,hl2;
UINT8 r,r2,iff1,iff2,halt,im,i;
UINT8 nmi_state; /* nmi line state */
UINT8 nmi_pending; /* nmi pending */
UINT8 irq_state; /* irq line state */
UINT8 after_ei; /* are we in the EI shadow? */
UINT32 ea;
PAIR prvpc,pc,sp,af,bc,de,hl,ix,iy,memptr;
PAIR af2,bc2,de2,hl2;
UINT8 r,r2,iff1,iff2,halt,im,i;
UINT8 nmi_state; /* nmi line state */
UINT8 nmi_pending; /* nmi pending */
UINT8 irq_state; /* irq line state */
UINT8 after_ei; /* are we in the EI shadow? */
UINT32 ea;
cpu_irq_callback irq_callback;
const device_config *device;
const address_space *program;
const address_space *io;
int icount;
int icount;
z80_daisy_state *daisy;
cpu_state_table state;
UINT8 rtemp;
UINT8 rtemp;
const UINT8 * cc_op;
const UINT8 * cc_cb;
const UINT8 * cc_ed;
const UINT8 * cc_xy;
const UINT8 * cc_xycb;
const UINT8 * cc_ex;
};
INLINE z80_state *get_safe_token(const device_config *device)
@ -376,9 +382,8 @@ static const UINT8 cc_ex[0x100] = {
6, 0, 0, 0, 7, 0, 0, 2, 6, 0, 0, 0, 7, 0, 0, 2,
6, 0, 0, 0, 7, 0, 0, 2, 6, 0, 0, 0, 7, 0, 0, 2};
static const UINT8 *cc[6];
#define Z80_TABLE_dd Z80_TABLE_xy
#define Z80_TABLE_fd Z80_TABLE_xy
#define cc_dd cc_xy
#define cc_fd cc_xy
static void take_interrupt(z80_state *z80);
static CPU_BURN( z80 );
@ -513,7 +518,7 @@ INLINE void BURNODD(z80_state *z80, int cycles, int opcodes, int cyclesum)
/***************************************************************
* adjust cycle count by n T-states
***************************************************************/
#define CC(Z,prefix,opcode) do { (Z)->icount -= cc[Z80_TABLE_##prefix][opcode]; } while (0)
#define CC(Z,prefix,opcode) do { (Z)->icount -= z80->cc_##prefix[opcode]; } while (0)
/***************************************************************
* execute an opcode
@ -3284,7 +3289,7 @@ static void take_interrupt(z80_state *z80)
RM16(z80, irq_vector, &z80->pc);
LOG(("Z80 '%s' IM2 [$%04x] = $%04x\n", z80->device->tag, irq_vector, z80->PCD));
/* CALL opcode timing */
z80->icount -= cc[Z80_TABLE_op][0xcd];
z80->icount -= z80->cc_op[0xcd];
}
else
/* Interrupt mode 1. RST 38h */
@ -3294,7 +3299,7 @@ static void take_interrupt(z80_state *z80)
PUSH(z80, pc);
z80->PCD = 0x0038;
/* RST $38 + 'interrupt latency' cycles */
z80->icount -= cc[Z80_TABLE_op][0xff] + cc[Z80_TABLE_ex][0xff];
z80->icount -= z80->cc_op[0xff] + cc_ex[0xff];
}
else
{
@ -3308,18 +3313,18 @@ static void take_interrupt(z80_state *z80)
PUSH(z80, pc);
z80->PCD = irq_vector & 0xffff;
/* CALL $xxxx + 'interrupt latency' cycles */
z80->icount -= cc[Z80_TABLE_op][0xcd] + cc[Z80_TABLE_ex][0xff];
z80->icount -= z80->cc_op[0xcd] + z80->cc_ex[0xff];
break;
case 0xc30000: /* jump */
z80->PCD = irq_vector & 0xffff;
/* JP $xxxx + 2 cycles */
z80->icount -= cc[Z80_TABLE_op][0xc3] + cc[Z80_TABLE_ex][0xff];
z80->icount -= z80->cc_op[0xc3] + z80->cc_ex[0xff];
break;
default: /* rst (or other opcodes?) */
PUSH(z80, pc);
z80->PCD = irq_vector & 0x0038;
/* RST $xx + 2 cycles */
z80->icount -= cc[Z80_TABLE_op][z80->PCD] + cc[Z80_TABLE_ex][z80->PCD];
z80->icount -= z80->cc_op[z80->PCD] + z80->cc_ex[z80->PCD];
break;
}
}
@ -3334,14 +3339,6 @@ static CPU_INIT( z80 )
z80_state *z80 = get_safe_token(device);
int i, p;
/* setup cycle tables */
cc[Z80_TABLE_op] = cc_op;
cc[Z80_TABLE_cb] = cc_cb;
cc[Z80_TABLE_ed] = cc_ed;
cc[Z80_TABLE_xy] = cc_xy;
cc[Z80_TABLE_xycb] = cc_xycb;
cc[Z80_TABLE_ex] = cc_ex;
if( !SZHVC_add || !SZHVC_sub )
{
int oldval, newval, val;
@ -3465,6 +3462,14 @@ static CPU_INIT( z80 )
z80->state = state_table_template;
z80->state.baseptr = z80;
z80->state.subtypemask = 1;
/* setup cycle tables */
z80->cc_op = cc_op;
z80->cc_cb = cc_cb;
z80->cc_ed = cc_ed;
z80->cc_xy = cc_xy;
z80->cc_xycb = cc_xycb;
z80->cc_ex = cc_ex;
}
/****************************************************************************
@ -3630,18 +3635,21 @@ static CPU_SET_INFO( z80 )
{
/* --- the following bits of info are set as 64-bit signed integers --- */
case CPUINFO_INT_INPUT_STATE + INPUT_LINE_NMI: set_irq_line(z80, INPUT_LINE_NMI, info->i); break;
case CPUINFO_INT_INPUT_STATE + 0: set_irq_line(z80, 0, info->i); break;
/* --- the following bits of info are set as pointers to data or functions --- */
case CPUINFO_PTR_Z80_CYCLE_TABLE + Z80_TABLE_op: cc[Z80_TABLE_op] = (const UINT8 *)info->p; break;
case CPUINFO_PTR_Z80_CYCLE_TABLE + Z80_TABLE_cb: cc[Z80_TABLE_cb] = (const UINT8 *)info->p; break;
case CPUINFO_PTR_Z80_CYCLE_TABLE + Z80_TABLE_ed: cc[Z80_TABLE_ed] = (const UINT8 *)info->p; break;
case CPUINFO_PTR_Z80_CYCLE_TABLE + Z80_TABLE_xy: cc[Z80_TABLE_xy] = (const UINT8 *)info->p; break;
case CPUINFO_PTR_Z80_CYCLE_TABLE + Z80_TABLE_xycb: cc[Z80_TABLE_xycb] = (const UINT8 *)info->p; break;
case CPUINFO_PTR_Z80_CYCLE_TABLE + Z80_TABLE_ex: cc[Z80_TABLE_ex] = (const UINT8 *)info->p; break;
case CPUINFO_INT_INPUT_STATE + 0: set_irq_line(z80, 0, info->i); break;
}
}
void z80_set_cycle_tables(const device_config *device, const UINT8 *op, const UINT8 *cb, const UINT8 *ed, const UINT8 *xy, const UINT8 *xycb, const UINT8 *ex)
{
z80_state *z80 = get_safe_token(device);
z80->cc_op = (op != NULL) ? op : cc_op;
z80->cc_cb = (cb != NULL) ? cb : cc_cb;
z80->cc_ed = (ed != NULL) ? ed : cc_ed;
z80->cc_xy = (xy != NULL) ? xy : cc_xy;
z80->cc_xycb = (xycb != NULL) ? xycb : cc_xycb;
z80->cc_ex = (ex != NULL) ? ex : cc_ex;
}
/**************************************************************************
@ -3689,13 +3697,6 @@ CPU_GET_INFO( z80 )
case CPUINFO_PTR_INSTRUCTION_COUNTER: info->icount = &z80->icount; break;
case CPUINFO_PTR_STATE_TABLE: info->state_table = &z80->state; break;
case CPUINFO_PTR_Z80_CYCLE_TABLE + Z80_TABLE_op: info->p = (void *)cc[Z80_TABLE_op]; break;
case CPUINFO_PTR_Z80_CYCLE_TABLE + Z80_TABLE_cb: info->p = (void *)cc[Z80_TABLE_cb]; break;
case CPUINFO_PTR_Z80_CYCLE_TABLE + Z80_TABLE_ed: info->p = (void *)cc[Z80_TABLE_ed]; break;
case CPUINFO_PTR_Z80_CYCLE_TABLE + Z80_TABLE_xy: info->p = (void *)cc[Z80_TABLE_xy]; break;
case CPUINFO_PTR_Z80_CYCLE_TABLE + Z80_TABLE_xycb: info->p = (void *)cc[Z80_TABLE_xycb]; break;
case CPUINFO_PTR_Z80_CYCLE_TABLE + Z80_TABLE_ex: info->p = (void *)cc[Z80_TABLE_ex]; break;
/* --- the following bits of info are returned as NULL-terminated strings --- */
case CPUINFO_STR_NAME: strcpy(info->s, "Z80"); break;
case CPUINFO_STR_CORE_FAMILY: strcpy(info->s, "Zilog Z80"); break;

22
src/emu/cpu/z80/z80.h
View File

@ -19,25 +19,11 @@ enum
Z80_GENPCBASE = REG_GENPCBASE
};
enum
{
Z80_TABLE_op,
Z80_TABLE_cb,
Z80_TABLE_ed,
Z80_TABLE_xy,
Z80_TABLE_xycb,
Z80_TABLE_ex /* cycles counts for taken jr/jp/call and interrupt latency (rst opcodes) */
};
enum
{
CPUINFO_PTR_Z80_CYCLE_TABLE = CPUINFO_PTR_CPU_SPECIFIC,
CPUINFO_PTR_Z80_CYCLE_TABLE_LAST = CPUINFO_PTR_Z80_CYCLE_TABLE + Z80_TABLE_ex
};
extern CPU_GET_INFO( z80 );
CPU_GET_INFO( z80 );
#define CPU_Z80 CPU_GET_INFO_NAME( z80 )
extern CPU_DISASSEMBLE( z80 );
CPU_DISASSEMBLE( z80 );
void z80_set_cycle_tables(const device_config *device, const UINT8 *op, const UINT8 *cb, const UINT8 *ed, const UINT8 *xy, const UINT8 *xycb, const UINT8 *ex);
#endif /* __Z80_H__ */