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get rid of old speedup hack (besides, it made halt timing inaccurate on drivers with custom cycletables)

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This commit is contained in:
Michaël Banaan Ananas 2012-09-02 22:52:44 +00:00
parent 68184de87e
commit 2da493f56d
1 changed files with 0 additions and 32 deletions
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32
src/emu/cpu/z80/z80.c
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@ -366,7 +366,6 @@ static const UINT8 cc_ex[0x100] = {
static void take_interrupt(z80_state *z80);
static void take_interrupt_nsc800(z80_state *z80);
static CPU_BURN( z80 );
typedef void (*funcptr)(z80_state *z80);
@ -477,19 +476,6 @@ PROTOTYPES(Z80ed,ed);
PROTOTYPES(Z80fd,fd);
PROTOTYPES(Z80xycb,xycb);
/****************************************************************************/
/* Burn an odd amount of cycles, that is instructions taking something */
/* different from 4 T-states per opcode (and r increment) */
/****************************************************************************/
INLINE void BURNODD(z80_state *z80, int cycles, int opcodes, int cyclesum)
{
if( cycles > 0 )
{
z80->r += (cycles / cyclesum) * opcodes;
z80->icount -= (cycles / cyclesum) * cyclesum;
}
}
/***************************************************************
* define an opcode function
***************************************************************/
@ -594,8 +580,6 @@ INLINE void BURNODD(z80_state *z80, int cycles, int opcodes, int cyclesum)
#define ENTER_HALT(Z) do { \
(Z)->PC--; \
(Z)->halt = 1; \
if( (Z)->irq_state == CLEAR_LINE ) \
CPU_BURN_NAME(z80)( (Z)->device, (Z)->icount); \
} while (0)
/***************************************************************
@ -3686,22 +3670,6 @@ static CPU_EXECUTE( z80 )
} while (z80->icount > 0);
}
/****************************************************************************
* Burn 'cycles' T-states. Adjust z80->r register for the lost time
****************************************************************************/
static CPU_BURN( z80 )
{
z80_state *z80 = get_safe_token(device);
if( cycles > 0 )
{
/* NOP takes 4 cycles per instruction */
int n = (cycles + 3) / 4;
z80->r += n;
z80->icount -= 4 * n;
}
}
/****************************************************************************
* Set IRQ line state
****************************************************************************/