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Current WIP code.

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OBattler
2020-02-29 19:12:23 +01:00
parent 3b6cc393eb
commit 490c04fcae
882 changed files with 37763 additions and 9455 deletions
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309
src/cpu_common/386_common.c Normal file
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#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <wchar.h>
#include <math.h>
#ifndef INFINITY
# define INFINITY (__builtin_inff())
#endif
#define HAVE_STDARG_H
#include "86box.h"
#include "cpu.h"
#include "timer.h"
#include "x86.h"
#include "x87.h"
#include "nmi.h"
#include "mem.h"
#include "pic.h"
#include "pit.h"
#include "fdd.h"
#include "fdc.h"
#include "386_common.h"
#include "x86_flags.h"
#include "codegen.h"
x86seg gdt, ldt, idt, tr;
uint32_t cr2, cr3, cr4;
uint32_t dr[8];
uint32_t use32;
int stack32;
int optype;
int trap;
uint32_t rmdat;
uint32_t *eal_r, *eal_w;
int nmi_enable = 1;
int cpl_override=0;
int fpucount=0;
#ifdef USE_NEW_DYNAREC
uint16_t cpu_cur_status = 0;
#else
uint32_t cpu_cur_status = 0;
#endif
uint32_t pccache;
uint8_t *pccache2;
#ifdef ENABLE_386_COMMON_LOG
int x386_common_do_log = ENABLE_386_COMMON_LOG;
void
x386_common_log(const char *fmt, ...)
{
va_list ap;
if (x386_common_do_log) {
va_start(ap, fmt);
pclog_ex(fmt, ap);
va_end(ap);
}
}
#else
#define x386_common_log(fmt, ...)
#endif
void x86_int(int num)
{
uint32_t addr;
flags_rebuild();
cpu_state.pc=cpu_state.oldpc;
if (msw&1)
{
pmodeint(num,0);
}
else
{
addr = (num << 2) + idt.base;
if ((num << 2) + 3 > idt.limit)
{
if (idt.limit < 35)
{
cpu_state.abrt = 0;
softresetx86();
cpu_set_edx();
#ifdef ENABLE_386_COMMON_LOG
x386_log("Triple fault in real mode - reset\n");
#endif
}
else
x86_int(8);
}
else
{
if (stack32)
{
writememw(ss,ESP-2,cpu_state.flags);
writememw(ss,ESP-4,CS);
writememw(ss,ESP-6,cpu_state.pc);
ESP-=6;
}
else
{
writememw(ss,((SP-2)&0xFFFF),cpu_state.flags);
writememw(ss,((SP-4)&0xFFFF),CS);
writememw(ss,((SP-6)&0xFFFF),cpu_state.pc);
SP-=6;
}
cpu_state.flags &= ~I_FLAG;
cpu_state.flags &= ~T_FLAG;
#ifndef USE_NEW_DYNAREC
oxpc=cpu_state.pc;
#endif
cpu_state.pc=readmemw(0,addr);
loadcs(readmemw(0,addr+2));
}
}
cycles-=70;
CPU_BLOCK_END();
}
void x86_int_sw(int num)
{
uint32_t addr;
flags_rebuild();
cycles -= timing_int;
if (msw&1)
{
pmodeint(num,1);
}
else
{
addr = (num << 2) + idt.base;
if ((num << 2) + 3 > idt.limit)
{
x86_int(13);
}
else
{
if (stack32)
{
writememw(ss,ESP-2,cpu_state.flags);
writememw(ss,ESP-4,CS);
writememw(ss,ESP-6,cpu_state.pc);
ESP-=6;
}
else
{
writememw(ss,((SP-2)&0xFFFF),cpu_state.flags);
writememw(ss,((SP-4)&0xFFFF),CS);
writememw(ss,((SP-6)&0xFFFF),cpu_state.pc);
SP-=6;
}
cpu_state.flags &= ~I_FLAG;
cpu_state.flags &= ~T_FLAG;
#ifndef USE_NEW_DYNAREC
oxpc=cpu_state.pc;
#endif
cpu_state.pc=readmemw(0,addr);
loadcs(readmemw(0,addr+2));
cycles -= timing_int_rm;
}
}
trap = 0;
CPU_BLOCK_END();
}
int x86_int_sw_rm(int num)
{
uint32_t addr;
uint16_t new_pc, new_cs;
flags_rebuild();
cycles -= timing_int;
addr = num << 2;
new_pc = readmemw(0, addr);
new_cs = readmemw(0, addr + 2);
if (cpu_state.abrt) return 1;
writememw(ss,((SP-2)&0xFFFF),cpu_state.flags);
if (cpu_state.abrt)
return 1;
writememw(ss,((SP-4)&0xFFFF),CS);
writememw(ss,((SP-6)&0xFFFF),cpu_state.pc);
if (cpu_state.abrt)
return 1;
SP-=6;
cpu_state.eflags &= ~VIF_FLAG;
cpu_state.flags &= ~T_FLAG;
cpu_state.pc = new_pc;
loadcs(new_cs);
#ifndef USE_NEW_DYNAREC
oxpc=cpu_state.pc;
#endif
cycles -= timing_int_rm;
trap = 0;
CPU_BLOCK_END();
return 0;
}
void x86illegal()
{
x86_int(6);
}
int checkio(int port)
{
uint16_t t;
uint8_t d;
cpl_override = 1;
t = readmemw(tr.base, 0x66);
cpl_override = 0;
if (cpu_state.abrt) return 0;
if ((t+(port>>3))>tr.limit) return 1;
cpl_override = 1;
#ifdef USE_NEW_DYNAREC
d = readmembl(tr.base + t + (port >> 3));
#else
d = readmemb386l(0, tr.base + t + (port >> 3));
#endif
cpl_override = 0;
return d&(1<<(port&7));
}
#define divexcp() { \
x386_common_log("Divide exception at %04X(%06X):%04X\n",CS,cs,cpu_state.pc); \
x86_int(0); \
}
int divl(uint32_t val)
{
uint64_t num, quo;
uint32_t rem, quo32;
if (val==0)
{
divexcp();
return 1;
}
num=(((uint64_t)EDX)<<32)|EAX;
quo=num/val;
rem=num%val;
quo32=(uint32_t)(quo&0xFFFFFFFF);
if (quo!=(uint64_t)quo32)
{
divexcp();
return 1;
}
EDX=rem;
EAX=quo32;
return 0;
}
int idivl(int32_t val)
{
int64_t num, quo;
int32_t rem, quo32;
if (val==0)
{
divexcp();
return 1;
}
num=(((uint64_t)EDX)<<32)|EAX;
quo=num/val;
rem=num%val;
quo32=(int32_t)(quo&0xFFFFFFFF);
if (quo!=(int64_t)quo32)
{
divexcp();
return 1;
}
EDX=rem;
EAX=quo32;
return 0;
}
void cpu_386_flags_extract()
{
flags_extract();
}
void cpu_386_flags_rebuild()
{
flags_rebuild();
}