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86Box/src/cpu/386.c

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Current WIP code.
2020-02-29 19:12:23 +01:00
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <wchar.h>
#include <math.h>
#ifndef INFINITY
Some clang-formatting in src/cpu
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# define INFINITY (__builtin_inff())
Current WIP code.
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#endif
#define HAVE_STDARG_H
Move all include files to src/include - 86Box's own headers go to /86box - munt's public interface goes to /mt32emu - all slirp headers go to /slirp (might want to consider using only its public inteface) - single file headers from other projects go in include root
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#include <86box/86box.h>
Current WIP code.
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#include "cpu.h"
Move all include files to src/include - 86Box's own headers go to /86box - munt's public interface goes to /mt32emu - all slirp headers go to /slirp (might want to consider using only its public inteface) - single file headers from other projects go in include root
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#include <86box/timer.h>
Current WIP code.
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#include "x86.h"
#include "x87.h"
Move all include files to src/include - 86Box's own headers go to /86box - munt's public interface goes to /mt32emu - all slirp headers go to /slirp (might want to consider using only its public inteface) - single file headers from other projects go in include root
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#include <86box/nmi.h>
#include <86box/mem.h>
#include <86box/pic.h>
#include <86box/pit.h>
#include <86box/fdd.h>
#include <86box/fdc.h>
ACPI, SMM, and PIIX fixes, fixes quite a few boards, also fixed the Via Apollo series northbridge ID's, some CPU instructions on both 808x and 286+, and added SMM to 486's (Intel and AMD), WinChip and WinChip 2, and VIA Cyrix III, also removed the TC430HX and the Toshiba machine from the Dev branch.
2020-04-16 21:56:19 +02:00
#include <86box/machine.h>
GDB Stub: Initial commit
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#include <86box/gdbstub.h>
Current WIP code.
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#include "386_common.h"
#ifdef USE_NEW_DYNAREC
Some clang-formatting in src/cpu
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# include "codegen.h"
Current WIP code.
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#endif
#undef CPU_BLOCK_END
#define CPU_BLOCK_END()
extern int codegen_flags_changed;
int tempc, oldcpl, optype, inttype, oddeven = 0;
int timetolive;
uint16_t oldcs;
uint32_t oldds, oldss, olddslimit, oldsslimit,
Some clang-formatting in src/cpu
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olddslimitw, oldsslimitw;
Current WIP code.
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uint32_t oxpc;
uint32_t rmdat32;
uint32_t backupregs[16];
x86seg _oldds;
Replaced the codegen_ops_NULL table references with NULL pointers, as it has the same effect without requiring an extra table of opcodes, also made the new recompiler clear codegen_flags_changed after every interpreted instruction to prevent conditional jumps from occasionally taking the wrong turn (fixes CL-GD 54x6 driver glitches in 24bpp mode on Windows 98 SE), and added instruction length heuristics on fetching the instruction, fixes Jane's US Navy Fighters.
2023-06-09 14:55:13 +02:00
#if 1
int opcode_length[256] = { 3, 3, 3, 3, 3, 3, 1, 1, 3, 3, 3, 3, 3, 3, 1, 3, /* 0x0x */
3, 3, 3, 3, 3, 3, 1, 1, 3, 3, 3, 3, 3, 3, 1, 1, /* 0x1x */
3, 3, 3, 3, 3, 3, 1, 1, 3, 3, 3, 3, 3, 3, 1, 1, /* 0x2x */
3, 3, 3, 3, 3, 3, 1, 1, 3, 3, 3, 3, 3, 3, 1, 1, /* 0x3x */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x4x */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x5x */
1, 1, 3, 3, 1, 1, 1, 1, 3, 3, 2, 3, 1, 1, 1, 1, /* 0x6x */
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0x7x */
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 0x8x */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, /* 0x9x */
3, 3, 3, 3, 1, 1, 1, 1, 2, 3, 1, 1, 1, 1, 1, 1, /* 0xax */
2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, /* 0xbx */
3, 3, 3, 1, 3, 3, 3, 3, 3, 1, 3, 1, 1, 2, 1, 1, /* 0xcx */
3, 3, 3, 3, 2, 2, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, /* 0xdx */
2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 2, 1, 1, 1, 1, /* 0xex */
1, 1, 1, 1, 1, 1, 3, 3, 1, 1, 1, 1, 1, 1, 3, 3 }; /* 0xfx */
#else
int opcode_length[256] = { 3, 3, 3, 3, 3, 3, 1, 1, 3, 3, 3, 3, 3, 3, 1, 3, /* 0x0x */
3, 3, 3, 3, 3, 3, 1, 1, 3, 3, 3, 3, 3, 3, 1, 1, /* 0x1x */
3, 3, 3, 3, 3, 3, 3, 1, 3, 3, 3, 3, 3, 3, 3, 1, /* 0x2x */
3, 3, 3, 3, 3, 3, 3, 1, 3, 3, 3, 3, 3, 3, 3, 1, /* 0x3x */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x4x */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x5x */
1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 2, 3, 1, 1, 1, 1, /* 0x6x */
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0x7x */
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 0x8x */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, /* 0x9x */
3, 3, 3, 3, 1, 1, 1, 1, 2, 3, 1, 1, 1, 1, 1, 1, /* 0xax */
2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, /* 0xbx */
3, 3, 3, 1, 3, 3, 3, 3, 3, 1, 3, 1, 1, 2, 1, 1, /* 0xcx */
3, 3, 3, 3, 2, 2, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, /* 0xdx */
2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 2, 1, 1, 1, 1, /* 0xex */
3, 1, 3, 3, 1, 1, 3, 3, 1, 1, 1, 1, 1, 1, 3, 3 }; /* 0xfx */
#endif
Current WIP code.
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#ifdef ENABLE_386_LOG
int x386_do_log = ENABLE_386_LOG;
void
x386_log(const char *fmt, ...)
{
va_list ap;
if (x386_do_log) {
Some clang-formatting in src/cpu
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va_start(ap, fmt);
pclog_ex(fmt, ap);
va_end(ap);
Current WIP code.
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}
}
#else
Some clang-formatting in src/cpu
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# define x386_log(fmt, ...)
Current WIP code.
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#endif
#undef CPU_BLOCK_END
#define CPU_BLOCK_END()
#include "x86_flags.h"
Fix some compile warns while I'm at it
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/*
Some clang-formatting in src/cpu
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#define getbytef() \
((uint8_t) (fetchdat)); \
cpu_state.pc++
#define getwordf() \
((uint16_t) (fetchdat)); \
cpu_state.pc += 2
#define getbyte2f() \
((uint8_t) (fetchdat >> 8)); \
cpu_state.pc++
#define getword2f() \
((uint16_t) (fetchdat >> 8)); \
cpu_state.pc += 2
Fix some compile warns while I'm at it
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*/
Some clang-formatting in src/cpu
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#define OP_TABLE(name) ops_##name
Current WIP code.
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Temporarily reverted that FPU clock cycles change.
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#if 0
Some clang-formatting in src/cpu
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# define CLOCK_CYCLES(c) \
{ \
if (fpu_cycles > 0) { \
fpu_cycles -= (c); \
if (fpu_cycles < 0) { \
cycles += fpu_cycles; \
} \
} else { \
cycles -= (c); \
} \
}
# define CLOCK_CYCLES_FPU(c) cycles -= (c)
# define CONCURRENCY_CYCLES(c) fpu_cycles = (c)
Temporarily reverted that FPU clock cycles change.
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#else
Some clang-formatting in src/cpu
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# define CLOCK_CYCLES(c) cycles -= (c)
# define CLOCK_CYCLES_FPU(c) cycles -= (c)
# define CONCURRENCY_CYCLES(c)
Temporarily reverted that FPU clock cycles change.
2022-02-01 19:07:22 +01:00
#endif
adjust CLOCK_CYCLES and related macros to handle fpu/iu concurrency add CLOCK_CYCLES_FPU, which does exactly what CLOCK_CYCLES already did. add CONCURRENCY_CYCLES, which sets fpu_cycles, which is the number of available concurrent execution cycles that the integer unit can do "free" work in while the fpu is executing. adjust CLOCK_CYCLES so that if there are fpu_cycles, the cycle count is subtracted from fpu_cycles instead of cycles, emulating the behavior of these concurrent cycles being "free" as on real hardware.
2022-01-29 07:27:45 -08:00
Current WIP code.
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#define CLOCK_CYCLES_ALWAYS(c) cycles -= (c)
#include "x86_ops.h"
void
exec386(int cycs)
{
Some clang-formatting in src/cpu
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int vector, tempi, cycdiff, oldcyc;
int cycle_period, ins_cycles;
Current WIP code.
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uint32_t addr;
cycles += cycs;
while (cycles > 0) {
Some clang-formatting in src/cpu
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cycle_period = (timer_target - (uint32_t) tsc) + 1;
Current WIP code.
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Some clang-formatting in src/cpu
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x86_was_reset = 0;
cycdiff = 0;
oldcyc = cycles;
while (cycdiff < cycle_period) {
ins_cycles = cycles;
Current WIP code.
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#ifndef USE_NEW_DYNAREC
Some clang-formatting in src/cpu
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oldcs = CS;
oldcpl = CPL;
Current WIP code.
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#endif
Some clang-formatting in src/cpu
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cpu_state.oldpc = cpu_state.pc;
cpu_state.op32 = use32;
Current WIP code.
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#ifndef USE_NEW_DYNAREC
Some clang-formatting in src/cpu
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x86_was_reset = 0;
Current WIP code.
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#endif
Some clang-formatting in src/cpu
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cpu_state.ea_seg = &cpu_state.seg_ds;
cpu_state.ssegs = 0;
Current WIP code.
2020-02-29 19:12:23 +01:00
Replaced the codegen_ops_NULL table references with NULL pointers, as it has the same effect without requiring an extra table of opcodes, also made the new recompiler clear codegen_flags_changed after every interpreted instruction to prevent conditional jumps from occasionally taking the wrong turn (fixes CL-GD 54x6 driver glitches in 24bpp mode on Windows 98 SE), and added instruction length heuristics on fetching the instruction, fixes Jane's US Navy Fighters.
2023-06-09 14:55:13 +02:00
fetchdat = fastreadl_fetch(cs + cpu_state.pc);
Current WIP code.
2020-02-29 19:12:23 +01:00
Some clang-formatting in src/cpu
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if (!cpu_state.abrt) {
Fixed SMM, overhauled the emulation of the VIA northbridges, and added the Via Apollo VP3.
2020-04-01 08:59:29 +02:00
#ifdef ENABLE_386_LOG
Some clang-formatting in src/cpu
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if (in_smm)
x386_log("[%04X:%08X] %08X\n", CS, cpu_state.pc, fetchdat);
Fixed SMM, overhauled the emulation of the VIA northbridges, and added the Via Apollo VP3.
2020-04-01 08:59:29 +02:00
#endif
Some clang-formatting in src/cpu
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opcode = fetchdat & 0xFF;
fetchdat >>= 8;
trap = cpu_state.flags & T_FLAG;
cpu_state.pc++;
x86_opcodes[(opcode | cpu_state.op32) & 0x3ff](fetchdat);
if (x86_was_reset)
break;
}
Fixed SMM, overhauled the emulation of the VIA northbridges, and added the Via Apollo VP3.
2020-04-01 08:59:29 +02:00
#ifdef ENABLE_386_LOG
Some clang-formatting in src/cpu
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else if (in_smm)
x386_log("[%04X:%08X] ABRT\n", CS, cpu_state.pc);
Fixed SMM, overhauled the emulation of the VIA northbridges, and added the Via Apollo VP3.
2020-04-01 08:59:29 +02:00
#endif
Current WIP code.
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#ifndef USE_NEW_DYNAREC
Some clang-formatting in src/cpu
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if (!use32)
cpu_state.pc &= 0xffff;
Current WIP code.
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#endif
Some clang-formatting in src/cpu
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if (cpu_end_block_after_ins)
cpu_end_block_after_ins--;
Improved STI fix.
2020-11-21 04:02:58 +01:00
Some clang-formatting in src/cpu
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if (cpu_state.abrt) {
flags_rebuild();
tempi = cpu_state.abrt & ABRT_MASK;
cpu_state.abrt = 0;
x86_doabrt(tempi);
if (cpu_state.abrt) {
cpu_state.abrt = 0;
Reverted a bad change to cpu/386.c, fixes freezes and mysterious behavior on the Interpreter.
2020-11-17 20:00:28 +01:00
#ifndef USE_NEW_DYNAREC
Some clang-formatting in src/cpu
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CS = oldcs;
Reverted a bad change to cpu/386.c, fixes freezes and mysterious behavior on the Interpreter.
2020-11-17 20:00:28 +01:00
#endif
Some clang-formatting in src/cpu
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cpu_state.pc = cpu_state.oldpc;
x386_log("Double fault\n");
pmodeint(8, 0);
if (cpu_state.abrt) {
cpu_state.abrt = 0;
softresetx86();
cpu_set_edx();
Reverted a bad change to cpu/386.c, fixes freezes and mysterious behavior on the Interpreter.
2020-11-17 20:00:28 +01:00
#ifdef ENABLE_386_LOG
Some clang-formatting in src/cpu
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x386_log("Triple fault - reset\n");
Reverted a bad change to cpu/386.c, fixes freezes and mysterious behavior on the Interpreter.
2020-11-17 20:00:28 +01:00
#endif
Some clang-formatting in src/cpu
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}
}
Do not raise CPU trap if an exception has occurred, fixes #2577.
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} else if (trap) {
flags_rebuild();
Code/Comments cleanup Tabs to spaces Whitespace Normalize clang-format comments
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trap = 0;
Do not raise CPU trap if an exception has occurred, fixes #2577.
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#ifndef USE_NEW_DYNAREC
Code/Comments cleanup Tabs to spaces Whitespace Normalize clang-format comments
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oldcs = CS;
Do not raise CPU trap if an exception has occurred, fixes #2577.
2022-10-28 04:12:31 +02:00
#endif
Code/Comments cleanup Tabs to spaces Whitespace Normalize clang-format comments
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cpu_state.oldpc = cpu_state.pc;
dr[6] |= 0x4000;
x86_int(1);
Some clang-formatting in src/cpu
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}
if (smi_line)
enter_smm_check(0);
Handle trap first also on interpreter - makes retf.exe at least run.
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else if (nmi && nmi_enable && nmi_mask) {
#ifndef USE_NEW_DYNAREC
clang format in cpu
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oldcs = CS;
Handle trap first also on interpreter - makes retf.exe at least run.
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#endif
Some clang-formatting in src/cpu
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cpu_state.oldpc = cpu_state.pc;
x86_int(2);
nmi_enable = 0;
Made NMI's always auto-clear, will revert if it makes things worse.
2021-09-02 15:24:17 +02:00
#ifdef OLD_NMI_BEHAVIOR
Some clang-formatting in src/cpu
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if (nmi_auto_clear) {
nmi_auto_clear = 0;
nmi = 0;
}
Made NMI's always auto-clear, will revert if it makes things worse.
2021-09-02 15:24:17 +02:00
#else
Some clang-formatting in src/cpu
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nmi = 0;
Made NMI's always auto-clear, will revert if it makes things worse.
2021-09-02 15:24:17 +02:00
#endif
Some clang-formatting in src/cpu
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} else if ((cpu_state.flags & I_FLAG) && pic.int_pending && !cpu_end_block_after_ins) {
vector = picinterrupt();
if (vector != -1) {
flags_rebuild();
if (msw & 1)
pmodeint(vector, 0);
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;
addr = (vector << 2) + idt.base;
cpu_state.flags &= ~I_FLAG;
cpu_state.flags &= ~T_FLAG;
cpu_state.pc = readmemw(0, addr);
loadcs(readmemw(0, addr + 2));
}
}
}
ins_cycles -= cycles;
tsc += ins_cycles;
cycdiff = oldcyc - cycles;
if (timetolive) {
timetolive--;
if (!timetolive)
fatal("Life expired\n");
}
if (TIMER_VAL_LESS_THAN_VAL(timer_target, (uint32_t) tsc))
timer_process_inline();
GDB Stub: Initial commit
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#ifdef USE_GDBSTUB
Some clang-formatting in src/cpu
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if (gdbstub_instruction())
return;
GDB Stub: Initial commit
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#endif
Some clang-formatting in src/cpu
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}
Current WIP code.
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}
}
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