2009-05-03 01:02:35 +02:00
|
|
|
/*
|
2009-06-03 07:25:50 +02:00
|
|
|
* Copyright (C) 2002-2009 The DOSBox Team
|
2009-05-03 01:02:35 +02:00
|
|
|
*
|
|
|
|
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
*/
|
|
|
|
|
2009-06-03 07:25:50 +02:00
|
|
|
/* $Id: core_prefetch.cpp,v 1.2 2009/05/27 09:15:41 qbix79 Exp $ */
|
2009-05-03 01:02:35 +02:00
|
|
|
|
|
|
|
#include <stdio.h>
|
|
|
|
|
|
|
|
#include "dosbox.h"
|
|
|
|
#include "mem.h"
|
|
|
|
#include "cpu.h"
|
|
|
|
#include "lazyflags.h"
|
|
|
|
#include "inout.h"
|
|
|
|
#include "callback.h"
|
|
|
|
#include "pic.h"
|
|
|
|
#include "fpu.h"
|
|
|
|
#include "paging.h"
|
|
|
|
|
|
|
|
#if C_DEBUG
|
|
|
|
#include "debug.h"
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#if (!C_CORE_INLINE)
|
|
|
|
#define LoadMb(off) mem_readb(off)
|
|
|
|
#define LoadMw(off) mem_readw(off)
|
|
|
|
#define LoadMd(off) mem_readd(off)
|
|
|
|
#define SaveMb(off,val) mem_writeb(off,val)
|
|
|
|
#define SaveMw(off,val) mem_writew(off,val)
|
|
|
|
#define SaveMd(off,val) mem_writed(off,val)
|
|
|
|
#else
|
|
|
|
#include "paging.h"
|
|
|
|
#define LoadMb(off) mem_readb_inline(off)
|
|
|
|
#define LoadMw(off) mem_readw_inline(off)
|
|
|
|
#define LoadMd(off) mem_readd_inline(off)
|
|
|
|
#define SaveMb(off,val) mem_writeb_inline(off,val)
|
|
|
|
#define SaveMw(off,val) mem_writew_inline(off,val)
|
|
|
|
#define SaveMd(off,val) mem_writed_inline(off,val)
|
|
|
|
#endif
|
|
|
|
|
|
|
|
extern Bitu cycle_count;
|
|
|
|
|
|
|
|
#if C_FPU
|
|
|
|
#define CPU_FPU 1 //Enable FPU escape instructions
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#define CPU_PIC_CHECK 1
|
|
|
|
#define CPU_TRAP_CHECK 1
|
|
|
|
|
|
|
|
#define OPCODE_NONE 0x000
|
|
|
|
#define OPCODE_0F 0x100
|
|
|
|
#define OPCODE_SIZE 0x200
|
|
|
|
|
|
|
|
#define PREFIX_ADDR 0x1
|
|
|
|
#define PREFIX_REP 0x2
|
|
|
|
|
|
|
|
#define TEST_PREFIX_ADDR (core.prefixes & PREFIX_ADDR)
|
|
|
|
#define TEST_PREFIX_REP (core.prefixes & PREFIX_REP)
|
|
|
|
|
|
|
|
#define DO_PREFIX_SEG(_SEG) \
|
|
|
|
BaseDS=SegBase(_SEG); \
|
|
|
|
BaseSS=SegBase(_SEG); \
|
|
|
|
core.base_val_ds=_SEG; \
|
|
|
|
goto restart_opcode;
|
|
|
|
|
|
|
|
#define DO_PREFIX_ADDR() \
|
|
|
|
core.prefixes=(core.prefixes & ~PREFIX_ADDR) | \
|
|
|
|
(cpu.code.big ^ PREFIX_ADDR); \
|
|
|
|
core.ea_table=&EATable[(core.prefixes&1) * 256]; \
|
|
|
|
goto restart_opcode;
|
|
|
|
|
|
|
|
#define DO_PREFIX_REP(_ZERO) \
|
|
|
|
core.prefixes|=PREFIX_REP; \
|
|
|
|
core.rep_zero=_ZERO; \
|
|
|
|
goto restart_opcode;
|
|
|
|
|
|
|
|
typedef PhysPt (*GetEAHandler)(void);
|
|
|
|
|
|
|
|
static const Bit32u AddrMaskTable[2]={0x0000ffff,0xffffffff};
|
|
|
|
|
|
|
|
static struct {
|
|
|
|
Bitu opcode_index;
|
|
|
|
PhysPt cseip;
|
|
|
|
PhysPt base_ds,base_ss;
|
|
|
|
SegNames base_val_ds;
|
|
|
|
bool rep_zero;
|
|
|
|
Bitu prefixes;
|
|
|
|
GetEAHandler * ea_table;
|
|
|
|
} core;
|
|
|
|
|
|
|
|
#define GETIP (core.cseip-SegBase(cs))
|
|
|
|
#define SAVEIP reg_eip=GETIP;
|
|
|
|
#define LOADIP core.cseip=(SegBase(cs)+reg_eip);
|
|
|
|
|
|
|
|
#define SegBase(c) SegPhys(c)
|
|
|
|
#define BaseDS core.base_ds
|
|
|
|
#define BaseSS core.base_ss
|
|
|
|
|
|
|
|
|
|
|
|
#define MAX_PQ_SIZE 32
|
|
|
|
static Bit8u prefetch_buffer[MAX_PQ_SIZE];
|
|
|
|
static bool pq_valid=false;
|
|
|
|
static Bitu pq_start;
|
|
|
|
|
|
|
|
static INLINE Bit8u Fetchb() {
|
|
|
|
Bit8u temp;
|
|
|
|
if (pq_valid && (core.cseip>=pq_start) && (core.cseip<pq_start+CPU_PrefetchQueueSize)) {
|
|
|
|
temp=prefetch_buffer[core.cseip-pq_start];
|
|
|
|
if ((core.cseip+1>=pq_start+CPU_PrefetchQueueSize-4) &&
|
|
|
|
(core.cseip+1<pq_start+CPU_PrefetchQueueSize)) {
|
|
|
|
Bitu remaining_bytes=pq_start+CPU_PrefetchQueueSize-(core.cseip+1);
|
|
|
|
for (Bitu i=0; i<remaining_bytes; i++) prefetch_buffer[i]=prefetch_buffer[core.cseip+1-pq_start+i];
|
|
|
|
for (Bitu i=remaining_bytes; i<CPU_PrefetchQueueSize; i++) prefetch_buffer[i]=LoadMb(core.cseip+1+i);
|
|
|
|
pq_start=core.cseip+1;
|
|
|
|
pq_valid=true;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
for (Bitu i=0; i<CPU_PrefetchQueueSize; i++) prefetch_buffer[i]=LoadMb(core.cseip+i);
|
|
|
|
pq_start=core.cseip;
|
|
|
|
pq_valid=true;
|
|
|
|
temp=prefetch_buffer[0];
|
|
|
|
}
|
|
|
|
/* if (temp!=LoadMb(core.cseip)) {
|
|
|
|
LOG_MSG("prefetch queue content!=memory at %x:%x",SegValue(cs),reg_eip);
|
|
|
|
} */
|
|
|
|
core.cseip+=1;
|
|
|
|
return temp;
|
|
|
|
}
|
|
|
|
|
|
|
|
static INLINE Bit16u Fetchw() {
|
|
|
|
Bit16u temp;
|
|
|
|
if (pq_valid && (core.cseip>=pq_start) && (core.cseip+2<pq_start+CPU_PrefetchQueueSize)) {
|
|
|
|
temp=prefetch_buffer[core.cseip-pq_start]|
|
|
|
|
(prefetch_buffer[core.cseip-pq_start+1]<<8);
|
|
|
|
if ((core.cseip+2>=pq_start+CPU_PrefetchQueueSize-4) &&
|
|
|
|
(core.cseip+2<pq_start+CPU_PrefetchQueueSize)) {
|
|
|
|
Bitu remaining_bytes=pq_start+CPU_PrefetchQueueSize-(core.cseip+2);
|
|
|
|
for (Bitu i=0; i<remaining_bytes; i++) prefetch_buffer[i]=prefetch_buffer[core.cseip+2-pq_start+i];
|
|
|
|
for (Bitu i=remaining_bytes; i<CPU_PrefetchQueueSize; i++) prefetch_buffer[i]=LoadMb(core.cseip+2+i);
|
|
|
|
pq_start=core.cseip+2;
|
|
|
|
pq_valid=true;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
for (Bitu i=0; i<CPU_PrefetchQueueSize; i++) prefetch_buffer[i]=LoadMb(core.cseip+i);
|
|
|
|
pq_start=core.cseip;
|
|
|
|
pq_valid=true;
|
|
|
|
temp=prefetch_buffer[0] | (prefetch_buffer[1]<<8);
|
|
|
|
}
|
|
|
|
/* if (temp!=LoadMw(core.cseip)) {
|
|
|
|
LOG_MSG("prefetch queue content!=memory at %x:%x",SegValue(cs),reg_eip);
|
|
|
|
} */
|
|
|
|
core.cseip+=2;
|
|
|
|
return temp;
|
|
|
|
}
|
|
|
|
|
|
|
|
static INLINE Bit32u Fetchd() {
|
|
|
|
Bit32u temp;
|
|
|
|
if (pq_valid && (core.cseip>=pq_start) && (core.cseip+4<pq_start+CPU_PrefetchQueueSize)) {
|
|
|
|
temp=prefetch_buffer[core.cseip-pq_start]|
|
|
|
|
(prefetch_buffer[core.cseip-pq_start+1]<<8)|
|
|
|
|
(prefetch_buffer[core.cseip-pq_start+2]<<16)|
|
|
|
|
(prefetch_buffer[core.cseip-pq_start+3]<<24);
|
|
|
|
if ((core.cseip+4>=pq_start+CPU_PrefetchQueueSize-4) &&
|
|
|
|
(core.cseip+4<pq_start+CPU_PrefetchQueueSize)) {
|
|
|
|
Bitu remaining_bytes=pq_start+CPU_PrefetchQueueSize-(core.cseip+4);
|
|
|
|
for (Bitu i=0; i<remaining_bytes; i++) prefetch_buffer[i]=prefetch_buffer[core.cseip+4-pq_start+i];
|
|
|
|
for (Bitu i=remaining_bytes; i<CPU_PrefetchQueueSize; i++) prefetch_buffer[i]=LoadMb(core.cseip+4+i);
|
|
|
|
pq_start=core.cseip+4;
|
|
|
|
pq_valid=true;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
for (Bitu i=0; i<CPU_PrefetchQueueSize; i++) prefetch_buffer[i]=LoadMb(core.cseip+i);
|
|
|
|
pq_start=core.cseip;
|
|
|
|
pq_valid=true;
|
|
|
|
temp=prefetch_buffer[0] | (prefetch_buffer[1]<<8) |
|
|
|
|
(prefetch_buffer[2]<<16) | (prefetch_buffer[3]<<24);
|
|
|
|
}
|
|
|
|
/* if (temp!=LoadMd(core.cseip)) {
|
|
|
|
LOG_MSG("prefetch queue content!=memory at %x:%x",SegValue(cs),reg_eip);
|
|
|
|
} */
|
|
|
|
core.cseip+=4;
|
|
|
|
return temp;
|
|
|
|
}
|
|
|
|
|
|
|
|
#define Push_16 CPU_Push16
|
|
|
|
#define Push_32 CPU_Push32
|
|
|
|
#define Pop_16 CPU_Pop16
|
|
|
|
#define Pop_32 CPU_Pop32
|
|
|
|
|
|
|
|
#include "instructions.h"
|
|
|
|
#include "core_normal/support.h"
|
|
|
|
#include "core_normal/string.h"
|
|
|
|
|
|
|
|
|
|
|
|
#define EALookupTable (core.ea_table)
|
|
|
|
|
|
|
|
Bits CPU_Core_Prefetch_Run(void) {
|
|
|
|
bool invalidate_pq=false;
|
|
|
|
while (CPU_Cycles-->0) {
|
|
|
|
if (invalidate_pq) {
|
|
|
|
pq_valid=false;
|
|
|
|
invalidate_pq=false;
|
|
|
|
}
|
|
|
|
LOADIP;
|
|
|
|
core.opcode_index=cpu.code.big*0x200;
|
|
|
|
core.prefixes=cpu.code.big;
|
|
|
|
core.ea_table=&EATable[cpu.code.big*256];
|
|
|
|
BaseDS=SegBase(ds);
|
|
|
|
BaseSS=SegBase(ss);
|
|
|
|
core.base_val_ds=ds;
|
|
|
|
#if C_DEBUG
|
|
|
|
#if C_HEAVY_DEBUG
|
|
|
|
if (DEBUG_HeavyIsBreakpoint()) {
|
|
|
|
FillFlags();
|
|
|
|
return debugCallback;
|
|
|
|
};
|
|
|
|
#endif
|
|
|
|
cycle_count++;
|
|
|
|
#endif
|
|
|
|
restart_opcode:
|
|
|
|
Bit8u next_opcode=Fetchb();
|
|
|
|
invalidate_pq=false;
|
|
|
|
if (core.opcode_index&OPCODE_0F) invalidate_pq=true;
|
|
|
|
else switch (next_opcode) {
|
|
|
|
case 0x70: case 0x71: case 0x72: case 0x73:
|
|
|
|
case 0x74: case 0x75: case 0x76: case 0x77:
|
|
|
|
case 0x78: case 0x79: case 0x7a: case 0x7b:
|
|
|
|
case 0x7c: case 0x7d: case 0x7e: case 0x7f: // jcc
|
|
|
|
case 0x9a: // call
|
|
|
|
case 0xc2: case 0xc3: // retn
|
|
|
|
case 0xc8: // enter
|
|
|
|
case 0xc9: // leave
|
|
|
|
case 0xca: case 0xcb: // retf
|
|
|
|
case 0xcc: // int3
|
|
|
|
case 0xcd: // int
|
|
|
|
case 0xce: // into
|
|
|
|
case 0xcf: // iret
|
|
|
|
case 0xe0: // loopnz
|
|
|
|
case 0xe1: // loopz
|
|
|
|
case 0xe2: // loop
|
|
|
|
case 0xe3: // jcxz
|
|
|
|
case 0xe8: // call
|
|
|
|
case 0xe9: case 0xea: case 0xeb: // jmp
|
|
|
|
case 0xff:
|
|
|
|
invalidate_pq=true;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
switch (core.opcode_index+next_opcode) {
|
|
|
|
#include "core_normal/prefix_none.h"
|
|
|
|
#include "core_normal/prefix_0f.h"
|
|
|
|
#include "core_normal/prefix_66.h"
|
|
|
|
#include "core_normal/prefix_66_0f.h"
|
|
|
|
default:
|
|
|
|
illegal_opcode:
|
|
|
|
#if C_DEBUG
|
|
|
|
{
|
|
|
|
Bitu len=(GETIP-reg_eip);
|
|
|
|
LOADIP;
|
|
|
|
if (len>16) len=16;
|
|
|
|
char tempcode[16*2+1];char * writecode=tempcode;
|
|
|
|
for (;len>0;len--) {
|
|
|
|
sprintf(writecode,"%X",mem_readb(core.cseip++));
|
|
|
|
writecode+=2;
|
|
|
|
}
|
|
|
|
LOG(LOG_CPU,LOG_NORMAL)("Illegal/Unhandled opcode %s",tempcode);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
CPU_Exception(6,0);
|
|
|
|
invalidate_pq=true;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
SAVEIP;
|
|
|
|
}
|
|
|
|
FillFlags();
|
|
|
|
return CBRET_NONE;
|
|
|
|
decode_end:
|
|
|
|
SAVEIP;
|
|
|
|
FillFlags();
|
|
|
|
return CBRET_NONE;
|
|
|
|
}
|
|
|
|
|
|
|
|
Bits CPU_Core_Prefetch_Trap_Run(void) {
|
|
|
|
Bits oldCycles = CPU_Cycles;
|
|
|
|
CPU_Cycles = 1;
|
|
|
|
cpu.trap_skip = false;
|
|
|
|
|
|
|
|
Bits ret=CPU_Core_Prefetch_Run();
|
|
|
|
if (!cpu.trap_skip) CPU_HW_Interrupt(1);
|
|
|
|
CPU_Cycles = oldCycles-1;
|
|
|
|
cpudecoder = &CPU_Core_Prefetch_Run;
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void CPU_Core_Prefetch_Init(void) {
|
|
|
|
|
|
|
|
}
|
|
|
|
|