Bits CPU_Core_Full_Run(void) {
FullData inst;
while (CPU_Cycles-->0) {
#if C_DEBUG
cycle_count++;
#if C_HEAVY_DEBUG
if (DEBUG_HeavyIsBreakpoint()) {
FillFlags();
return debugCallback;
};
#endif
#endif
LoadIP();
inst.entry=cpu.code.big*0x200;
inst.prefix=cpu.code.big;
restartopcode:
inst.entry=(inst.entry & 0xffffff00) | Fetchb();
inst.code=OpCodeTable[inst.entry];
#include "core_full/load.h"
#include "core_full/op.h"
#include "core_full/save.h"
nextopcode:;
SaveIP();
continue;
illegalopcode:
LOG(LOG_CPU,LOG_NORMAL)("Illegal opcode");
CPU_Exception(0x6,0);
}
FillFlags();
return CBRET_NONE;
}
Bits CPU_Core_Normal_Run(void)
{
while (CPU_Cycles-- > 0)
{
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;
restart_opcode:
// lastOpcode = core.opcode_index+Fetchb();
// switch (lastOpcode)
switch (core.opcode_index+Fetchb())
{
#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:
CPU_Exception(6, 0);
continue;
}
SAVEIP;
}
FillFlags();
return CBRET_NONE;
decode_end:
SAVEIP;
FillFlags();
return CBRET_NONE;
}
Bits CPU_Core_Simple_Run(void) {
while (CPU_Cycles-->0) {
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
#endif
cycle_count++;
restart_opcode:
switch (core.opcode_index+Fetchb()) {
#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);
continue;
}
SAVEIP;
}
FillFlags();
return CBRET_NONE;
decode_end:
SAVEIP;
FillFlags();
return CBRET_NONE;
}
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
{
bool ignore=false;
Bitu len=(GETIP-reg_eip);
LOADIP;
if (len>16) len=16;
char tempcode[16*2+1];char * writecode=tempcode;
if (ignore_opcode_63 && mem_readb(core.cseip) == 0x63)
ignore = true;
for (;len>0;len--) {
sprintf(writecode,"%02X",mem_readb(core.cseip++));
writecode+=2;
}
if (!ignore)
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_Core286_Normal_Run(void) {
if (CPU_Cycles <= 0)
return CBRET_NONE;
while (CPU_Cycles-->0) {
LOADIP;
core.prefixes=0;
core.opcode_index=0;
core.ea_table=&EATable[0];
BaseDS=SegBase(ds);
BaseSS=SegBase(ss);
core.base_val_ds=ds;
#if C_DEBUG
#if C_HEAVY_DEBUG
if (DEBUG_HeavyIsBreakpoint()) {
FillFlags();
return (Bits)debugCallback;
};
#endif
#endif
cycle_count++;
restart_opcode:
switch (core.opcode_index+Fetchb()) {
#include "core_normal/prefix_none.h"
#include "core_normal/prefix_0f.h"
default:
illegal_opcode:
#if C_DEBUG
{
bool ignore=false;
Bitu len=(GETIP-reg_eip);
LOADIP;
if (len>16) len=16;
char tempcode[16*2+1];char * writecode=tempcode;
if (ignore_opcode_63 && mem_readb(core.cseip) == 0x63)
ignore = true;
for (;len>0;len--) {
sprintf(writecode,"%02X",mem_readb(core.cseip++));
writecode+=2;
}
if (!ignore)
LOG(LOG_CPU,LOG_NORMAL)("Illegal/Unhandled opcode %s",tempcode);
}
#endif
CPU_Exception(6,0);
continue;
gp_fault:
CPU_Exception(EXCEPTION_GP,0);
continue;
}
SAVEIP;
}
FillFlags();
return CBRET_NONE;
/* 8086/286 multiple prefix interrupt bug emulation.
* If an instruction is interrupted, only the last prefix is restarted.
* See also [https://www.pcjs.org/pubs/pc/reference/intel/8086/] and [https://www.youtube.com/watch?v=6FC-tcwMBnU] */
prefix_out:
SAVEIP_PREFIX;
FillFlags();
return CBRET_NONE;
decode_end:
SAVEIP;
FillFlags();
return CBRET_NONE;
}
Bits CPU_Core_Normal_Run(void) {
while (CPU_Cycles-->0) {
LOADIP;
dosbox_check_nonrecursive_pf_cs = SegValue(cs);
dosbox_check_nonrecursive_pf_eip = reg_eip;
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
#endif
cycle_count++;
restart_opcode:
switch (core.opcode_index+Fetchb()) {
#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
{
bool ignore=false;
Bitu len=(GETIP-reg_eip);
LOADIP;
if (len>16) len=16;
char tempcode[16*2+1];char * writecode=tempcode;
if (ignore_opcode_63 && mem_readb(core.cseip) == 0x63)
ignore = true;
for (;len>0;len--) {
sprintf(writecode,"%02X",mem_readb(core.cseip++));
writecode+=2;
}
if (!ignore)
LOG(LOG_CPU,LOG_NORMAL)("Illegal/Unhandled opcode %s",tempcode);
}
#endif
CPU_Exception(6,0);
continue;
gp_fault:
LOG_MSG("Segment limit violation");
CPU_Exception(EXCEPTION_GP,0);
continue;
}
SAVEIP;
}
FillFlags();
return CBRET_NONE;
decode_end:
SAVEIP;
FillFlags();
return CBRET_NONE;
}
