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dosbox-wii/src/cpu/core_dyn_x86/decoder.h
Carl.Kenner a0ed243c23 DOSBox 0.61
2009-05-02 21:53:27 +00:00

1412 lines
45 KiB
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/*
* Copyright (C) 2002-2004 The DOSBox Team
*
* 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 Library 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.
*/
enum REP_Type {
REP_NONE=0,REP_NZ,REP_Z
};
static struct DynDecode {
PhysPt code;
PhysPt code_start;
PhysPt op_start;
bool big_op;
bool big_addr;
REP_Type rep;
Bitu cycles;
CacheBlock * block;
struct {
Bitu val;
Bitu mod;
Bitu rm;
Bitu reg;
} modrm;
DynReg * segprefix;
} decode;
static Bit8u INLINE decode_fetchb(void) {
return mem_readb(decode.code++);
}
static Bit16u INLINE decode_fetchw(void) {
decode.code+=2;
return mem_readw(decode.code-2);
}
static Bit32u INLINE decode_fetchd(void) {
decode.code+=4;
return mem_readd(decode.code-4);
}
static void dyn_read_byte(DynReg * addr,DynReg * dst,Bitu high) {
if (high) gen_call_function((void *)&mem_readb,"%Dd%Rh",addr,dst);
else gen_call_function((void *)&mem_readb,"%Dd%Rl",addr,dst);
}
static void dyn_write_byte(DynReg * addr,DynReg * val,Bitu high) {
if (high) gen_call_function((void *)&mem_writeb,"%Dd%Dh",addr,val);
else gen_call_function((void *)&mem_writeb,"%Dd%Dl",addr,val);
}
static void dyn_read_word(DynReg * addr,DynReg * dst,bool dword) {
if (dword) gen_call_function((void *)&mem_readd,"%Dd%Rd",addr,dst);
else gen_call_function((void *)&mem_readw,"%Dd%Rw",addr,dst);
}
static void dyn_write_word(DynReg * addr,DynReg * val,bool dword) {
if (dword) gen_call_function((void *)&mem_writed,"%Dd%Dd",addr,val);
else gen_call_function((void *)&mem_writew,"%Dd%Dw",addr,val);
}
static void dyn_reduce_cycles(void) {
if (!decode.cycles) decode.cycles++;
gen_lea(DREG(CYCLES),DREG(CYCLES),0,0,-(Bits)decode.cycles);
gen_releasereg(DREG(CYCLES));
}
static void dyn_push(DynReg * dynreg) {
gen_storeflags();
if (decode.big_op) {
gen_dop_word_imm(DOP_SUB,true,DREG(ESP),4);
} else {
gen_dop_word_imm(DOP_SUB,true,DREG(ESP),2);
}
gen_dop_word(DOP_MOV,true,DREG(STACK),DREG(ESP));
gen_dop_word(DOP_AND,true,DREG(STACK),DREG(SMASK));
gen_dop_word(DOP_ADD,true,DREG(STACK),DREG(SS));
if (decode.big_op) {
gen_call_function((void *)&mem_writed,"%Drd%Dd",DREG(STACK),dynreg);
} else {
//Can just push the whole 32-bit word as operand
gen_call_function((void *)&mem_writew,"%Drd%Dd",DREG(STACK),dynreg);
}
gen_releasereg(DREG(STACK));
gen_restoreflags();
}
static void dyn_pop(DynReg * dynreg) {
gen_storeflags();
gen_dop_word(DOP_MOV,true,DREG(STACK),DREG(ESP));
gen_dop_word(DOP_AND,true,DREG(STACK),DREG(SMASK));
gen_dop_word(DOP_ADD,true,DREG(STACK),DREG(SS));
if (decode.big_op) {
gen_call_function((void *)&mem_readd,"%Rd%Drd",dynreg,DREG(STACK));
} else {
gen_call_function((void *)&mem_readw,"%Rw%Drd",dynreg,DREG(STACK));
}
if (dynreg!=DREG(ESP)) {
if (decode.big_op) {
gen_dop_word_imm(DOP_ADD,true,DREG(ESP),4);
} else {
gen_dop_word_imm(DOP_ADD,true,DREG(ESP),2);
}
}
gen_releasereg(DREG(STACK));
gen_restoreflags();
}
static void INLINE dyn_get_modrm(void) {
decode.modrm.val=decode_fetchb();
decode.modrm.mod=(decode.modrm.val >> 6) & 3;
decode.modrm.reg=(decode.modrm.val >> 3) & 7;
decode.modrm.rm=(decode.modrm.val & 7);
}
static void dyn_fill_ea(bool addseg=true) {
DynReg * segbase;
if (!decode.big_addr) {
Bits imm;
switch (decode.modrm.mod) {
case 0:imm=0;break;
case 1:imm=(Bit8s)decode_fetchb();break;
case 2:imm=(Bit16s)decode_fetchw();break;
}
switch (decode.modrm.rm) {
case 0:/* BX+SI */
gen_lea(DREG(EA),DREG(EBX),DREG(ESI),0,imm);
segbase=DREG(DS);
break;
case 1:/* BX+DI */
gen_lea(DREG(EA),DREG(EBX),DREG(EDI),0,imm);
segbase=DREG(DS);
break;
case 2:/* BP+SI */
gen_lea(DREG(EA),DREG(EBP),DREG(ESI),0,imm);
segbase=DREG(SS);
break;
case 3:/* BP+DI */
gen_lea(DREG(EA),DREG(EBP),DREG(EDI),0,imm);
segbase=DREG(SS);
break;
case 4:/* SI */
gen_lea(DREG(EA),DREG(ESI),0,0,imm);
segbase=DREG(DS);
break;
case 5:/* DI */
gen_lea(DREG(EA),DREG(EDI),0,0,imm);
segbase=DREG(DS);
break;
case 6:/* imm/BP */
if (!decode.modrm.mod) {
imm=(Bit16s)decode_fetchw();
gen_dop_word_imm(DOP_MOV,true,DREG(EA),imm);
segbase=DREG(DS);
} else {
gen_lea(DREG(EA),DREG(EBP),0,0,imm);
segbase=DREG(SS);
}
break;
case 7: /* BX */
gen_lea(DREG(EA),DREG(EBX),0,0,imm);
segbase=DREG(DS);
break;
}
gen_extend_word(false,DREG(EA),DREG(EA));
} else {
Bits imm=0;
DynReg * base=0;DynReg * scaled=0;Bitu scale=0;
switch (decode.modrm.rm) {
case 0:base=DREG(EAX);segbase=DREG(DS);break;
case 1:base=DREG(ECX);segbase=DREG(DS);break;
case 2:base=DREG(EDX);segbase=DREG(DS);break;
case 3:base=DREG(EBX);segbase=DREG(DS);break;
case 4: /* SIB */
{
Bitu sib=decode_fetchb();
switch (sib & 7) {
case 0:base=DREG(EAX);segbase=DREG(DS);break;
case 1:base=DREG(ECX);segbase=DREG(DS);break;
case 2:base=DREG(EDX);segbase=DREG(DS);break;
case 3:base=DREG(EBX);segbase=DREG(DS);break;
case 4:base=DREG(ESP);segbase=DREG(SS);break;
case 5:
if (decode.modrm.mod) {
base=DREG(EBP);segbase=DREG(SS);
} else {
imm=(Bit32s)decode_fetchd();segbase=DREG(DS);
}
break;
case 6:base=DREG(ESI);segbase=DREG(DS);break;
case 7:base=DREG(EDI);segbase=DREG(DS);break;
}
static DynReg * scaledtable[8]={
DREG(EAX),DREG(ECX),DREG(EDX),DREG(EBX),
0,DREG(EBP),DREG(ESI),DREG(EDI),
};
scaled=scaledtable[(sib >> 3) &7];
scale=(sib >> 6);
}
break; /* SIB Break */
case 5:
if (decode.modrm.mod) {
base=DREG(EBP);segbase=DREG(SS);
} else {
imm=(Bit32s)decode_fetchd();segbase=DREG(DS);
}
break;
case 6:base=DREG(ESI);segbase=DREG(DS);break;
case 7:base=DREG(EDI);segbase=DREG(DS);break;
}
switch (decode.modrm.mod) {
case 1:imm=(Bit8s)decode_fetchb();break;
case 2:imm=(Bit32s)decode_fetchd();break;
}
gen_lea(DREG(EA),base,scaled,scale,imm);
}
if (addseg) {
gen_lea(DREG(EA),DREG(EA),decode.segprefix ? decode.segprefix : segbase,0,0);
}
}
#include "helpers.h"
#include "string.h"
static void dyn_dop_ebgb(DualOps op) {
dyn_get_modrm();DynReg * rm_reg=&DynRegs[decode.modrm.reg&3];
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_read_byte(DREG(EA),DREG(TMPB),false);
gen_dop_byte(op,DREG(TMPB),0,rm_reg,decode.modrm.reg&4);
dyn_write_byte(DREG(EA),DREG(TMPB),false);
gen_releasereg(DREG(EA));gen_releasereg(DREG(TMPB));
} else {
gen_dop_byte(op,&DynRegs[decode.modrm.rm&3],decode.modrm.rm&4,rm_reg,decode.modrm.reg&4);
}
}
static void dyn_dop_gbeb(DualOps op) {
dyn_get_modrm();DynReg * rm_reg=&DynRegs[decode.modrm.reg&3];
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_read_byte(DREG(EA),DREG(TMPB),false);
gen_dop_byte(op,rm_reg,decode.modrm.reg&4,DREG(TMPB),0);
gen_releasereg(DREG(EA));gen_releasereg(DREG(TMPB));
} else {
gen_dop_byte(op,rm_reg,decode.modrm.reg&4,&DynRegs[decode.modrm.rm&3],decode.modrm.rm&4);
}
}
static void dyn_mov_ebib(void) {
dyn_get_modrm();
if (decode.modrm.mod<3) {
//TODO Maybe not use a temp register here and call mem_writeb directly?
dyn_fill_ea();
gen_dop_byte_imm(DOP_MOV,DREG(TMPB),0,decode_fetchb());
dyn_write_byte(DREG(EA),DREG(TMPB),false);
gen_releasereg(DREG(EA));gen_releasereg(DREG(TMPB));
} else {
gen_dop_byte_imm(DOP_MOV,&DynRegs[decode.modrm.rm&3],decode.modrm.rm&4,decode_fetchb());
}
}
static void dyn_mov_ebgb(void) {
dyn_get_modrm();
DynReg * rm_reg=&DynRegs[decode.modrm.reg&3];Bitu rm_regi=decode.modrm.reg&4;
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_write_byte(DREG(EA),rm_reg,rm_regi);
gen_releasereg(DREG(EA));
} else {
gen_dop_byte(DOP_MOV,&DynRegs[decode.modrm.rm&3],decode.modrm.rm&4,rm_reg,rm_regi);
}
}
static void dyn_mov_gbeb(void) {
dyn_get_modrm();
DynReg * rm_reg=&DynRegs[decode.modrm.reg&3];Bitu rm_regi=decode.modrm.reg&4;
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_read_byte(DREG(EA),rm_reg,rm_regi);
gen_releasereg(DREG(EA));
} else {
gen_dop_byte(DOP_MOV,rm_reg,rm_regi,&DynRegs[decode.modrm.rm&3],decode.modrm.rm&4);
}
}
static void dyn_dop_evgv(DualOps op) {
dyn_get_modrm();
DynReg * rm_reg=&DynRegs[decode.modrm.reg];
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_read_word(DREG(EA),DREG(TMPW),decode.big_op);
gen_dop_word(op,decode.big_op,DREG(TMPW),rm_reg);
dyn_write_word(DREG(EA),DREG(TMPW),decode.big_op);
gen_releasereg(DREG(EA));gen_releasereg(DREG(TMPW));
} else {
gen_dop_word(op,decode.big_op,&DynRegs[decode.modrm.rm],rm_reg);
}
}
static void dyn_imul_gvev(Bitu immsize) {
dyn_get_modrm();DynReg * src;
DynReg * rm_reg=&DynRegs[decode.modrm.reg];
if (decode.modrm.mod<3) {
dyn_fill_ea();dyn_read_word(DREG(EA),DREG(TMPW),decode.big_op);
src=DREG(TMPW);gen_releasereg(DREG(EA));
} else {
src=&DynRegs[decode.modrm.rm];
}
switch (immsize) {
case 0:gen_imul_word(decode.big_op,rm_reg,src);break;
case 1:gen_imul_word_imm(decode.big_op,rm_reg,src,(Bit8s)decode_fetchb());break;
case 2:gen_imul_word_imm(decode.big_op,rm_reg,src,(Bit16s)decode_fetchw());break;
case 4:gen_imul_word_imm(decode.big_op,rm_reg,src,(Bit32s)decode_fetchd());break;
}
gen_releasereg(DREG(TMPW));
}
static void dyn_dop_gvev(DualOps op) {
dyn_get_modrm();
DynReg * rm_reg=&DynRegs[decode.modrm.reg];
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_read_word(DREG(EA),DREG(TMPW),decode.big_op);
gen_dop_word(op,decode.big_op,rm_reg,DREG(TMPW));
gen_releasereg(DREG(EA));gen_releasereg(DREG(TMPW));
} else {
gen_dop_word(op,decode.big_op,rm_reg,&DynRegs[decode.modrm.rm]);
}
}
static void dyn_mov_evgv(void) {
dyn_get_modrm();
DynReg * rm_reg=&DynRegs[decode.modrm.reg];
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_write_word(DREG(EA),rm_reg,decode.big_op);
gen_releasereg(DREG(EA));
} else {
gen_dop_word(DOP_MOV,decode.big_op,&DynRegs[decode.modrm.rm],rm_reg);
}
}
static void dyn_mov_gvev(void) {
dyn_get_modrm();
DynReg * rm_reg=&DynRegs[decode.modrm.reg];
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_read_word(DREG(EA),rm_reg,decode.big_op);
gen_releasereg(DREG(EA));
} else {
gen_dop_word(DOP_MOV,decode.big_op,rm_reg,&DynRegs[decode.modrm.rm]);
}
}
static void dyn_mov_eviv(void) {
dyn_get_modrm();
if (decode.modrm.mod<3) {
dyn_fill_ea();
gen_dop_word_imm(DOP_MOV,decode.big_op,DREG(TMPW),decode.big_op ? decode_fetchd() : decode_fetchw());
dyn_write_word(DREG(EA),DREG(TMPW),decode.big_op);
gen_releasereg(DREG(EA));gen_releasereg(DREG(TMPW));
} else {
gen_dop_word_imm(DOP_MOV,decode.big_op,&DynRegs[decode.modrm.rm],decode.big_op ? decode_fetchd() : decode_fetchw());
}
}
static void dyn_mov_ev_gb(bool sign) {
dyn_get_modrm();DynReg * rm_reg=&DynRegs[decode.modrm.reg];
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_read_byte(DREG(EA),DREG(TMPB),false);
gen_releasereg(DREG(EA));
gen_extend_byte(sign,decode.big_op,rm_reg,DREG(TMPB),0);
gen_releasereg(DREG(TMPB));
} else {
gen_extend_byte(sign,decode.big_op,rm_reg,&DynRegs[decode.modrm.rm&3],decode.modrm.rm&4);
}
}
static void dyn_mov_ev_gw(bool sign) {
if (!decode.big_op) {
dyn_mov_evgv();
return;
}
dyn_get_modrm();DynReg * rm_reg=&DynRegs[decode.modrm.reg];
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_read_word(DREG(EA),DREG(TMPW),false);
gen_releasereg(DREG(EA));
gen_extend_word(sign,rm_reg,DREG(TMPW));
} else {
gen_extend_word(sign,rm_reg,&DynRegs[decode.modrm.rm]);
}
}
static void dyn_dshift_ev_gv(bool left,bool immediate) {
dyn_get_modrm();
DynReg * rm_reg=&DynRegs[decode.modrm.reg];
DynReg * ea_reg;
if (decode.modrm.mod<3) {
dyn_fill_ea();ea_reg=DREG(TMPW);
dyn_read_word(DREG(EA),DREG(TMPW),decode.big_op);
} else ea_reg=&DynRegs[decode.modrm.rm];
if (immediate) gen_dshift_imm(decode.big_op,left,ea_reg,rm_reg,decode_fetchb());
else gen_dshift_cl(decode.big_op,left,ea_reg,rm_reg,DREG(ECX));
if (decode.modrm.mod<3) {
dyn_write_word(DREG(EA),DREG(TMPW),decode.big_op);
gen_releasereg(DREG(EA));gen_releasereg(DREG(TMPW));
}
}
static DualOps grp1_table[8]={DOP_ADD,DOP_OR,DOP_ADC,DOP_SBB,DOP_AND,DOP_SUB,DOP_XOR,DOP_CMP};
static void dyn_grp1_eb_ib(void) {
dyn_get_modrm();
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_read_byte(DREG(EA),DREG(TMPB),false);
gen_dop_byte_imm(grp1_table[decode.modrm.reg],DREG(TMPB),0,decode_fetchb());
if (grp1_table[decode.modrm.reg]!=DOP_CMP) dyn_write_byte(DREG(EA),DREG(TMPB),false);
gen_releasereg(DREG(EA));gen_releasereg(DREG(TMPB));
} else {
gen_dop_byte_imm(grp1_table[decode.modrm.reg],&DynRegs[decode.modrm.rm&3],decode.modrm.rm&4,decode_fetchb());
}
}
static void dyn_grp1_ev_ivx(bool withbyte) {
dyn_get_modrm();
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_read_word(DREG(EA),DREG(TMPW),decode.big_op);
Bits imm=withbyte ? (Bit8s)decode_fetchb() : (decode.big_op ? decode_fetchd(): decode_fetchw());
gen_dop_word_imm(grp1_table[decode.modrm.reg],decode.big_op,DREG(TMPW),imm);
dyn_write_word(DREG(EA),DREG(TMPW),decode.big_op);
gen_releasereg(DREG(EA));gen_releasereg(DREG(TMPW));
} else {
Bits imm=withbyte ? (Bit8s)decode_fetchb() : (decode.big_op ? decode_fetchd(): decode_fetchw());
gen_dop_word_imm(grp1_table[decode.modrm.reg],decode.big_op,&DynRegs[decode.modrm.rm],imm);
}
}
static ShiftOps grp2_table[8]={
SHIFT_ROL,SHIFT_ROR,SHIFT_RCL,SHIFT_RCR,
SHIFT_SHL,SHIFT_SHR,SHIFT_SHL,SHIFT_SAR
};
enum grp2_types {
grp2_1,grp2_imm,grp2_cl,
};
static void dyn_grp2_eb(grp2_types type) {
dyn_get_modrm();
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_read_byte(DREG(EA),DREG(TMPB),false);
DynReg * shift;
switch (type) {
case grp2_cl:shift=DREG(ECX);break;
case grp2_1:shift=DREG(SHIFT);gen_dop_byte_imm(DOP_MOV,DREG(SHIFT),0,1);break;
case grp2_imm:shift=DREG(SHIFT);gen_dop_byte_imm(DOP_MOV,DREG(SHIFT),0,decode_fetchb());break;
}
gen_shift_byte(grp2_table[decode.modrm.reg],shift,DREG(TMPB),0);
dyn_write_byte(DREG(EA),DREG(TMPB),false);
gen_releasereg(DREG(EA));gen_releasereg(DREG(TMPB));gen_releasereg(DREG(SHIFT));
} else {
DynReg * shift;
switch (type) {
case grp2_cl:shift=DREG(ECX);break;
case grp2_1:shift=DREG(SHIFT);gen_dop_byte_imm(DOP_MOV,DREG(SHIFT),0,1);break;
case grp2_imm:shift=DREG(SHIFT);gen_dop_byte_imm(DOP_MOV,DREG(SHIFT),0,decode_fetchb());break;
}
gen_shift_byte(grp2_table[decode.modrm.reg],shift,&DynRegs[decode.modrm.rm&3],decode.modrm.rm&4);
gen_releasereg(DREG(SHIFT));
}
}
static void dyn_grp2_ev(grp2_types type) {
dyn_get_modrm();
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_read_word(DREG(EA),DREG(TMPW),decode.big_op);
DynReg * shift;
switch (type) {
case grp2_cl:shift=DREG(ECX);break;
case grp2_1:shift=DREG(SHIFT);gen_dop_byte_imm(DOP_MOV,DREG(SHIFT),0,1);break;
case grp2_imm:shift=DREG(SHIFT);gen_dop_byte_imm(DOP_MOV,DREG(SHIFT),0,decode_fetchb());break;
}
gen_shift_word(grp2_table[decode.modrm.reg],shift,decode.big_op,DREG(TMPW));
dyn_write_word(DREG(EA),DREG(TMPW),decode.big_op);
gen_releasereg(DREG(EA));gen_releasereg(DREG(TMPW));gen_releasereg(DREG(SHIFT));
} else {
DynReg * shift;
switch (type) {
case grp2_cl:shift=DREG(ECX);break;
case grp2_1:shift=DREG(SHIFT);gen_dop_byte_imm(DOP_MOV,DREG(SHIFT),0,1);break;
case grp2_imm:shift=DREG(SHIFT);gen_dop_byte_imm(DOP_MOV,DREG(SHIFT),0,decode_fetchb());break;
}
gen_shift_word(grp2_table[decode.modrm.reg],shift,decode.big_op,&DynRegs[decode.modrm.rm]);
gen_releasereg(DREG(SHIFT));
}
}
static void dyn_grp3_eb(void) {
DynState state;Bit8u * branch;
dyn_get_modrm();DynReg * src;Bit8u src_i;
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_read_byte(DREG(EA),DREG(TMPB),false);
src=DREG(TMPB);src_i=0;
} else {
src=&DynRegs[decode.modrm.rm&3];
src_i=decode.modrm.rm&4;
}
switch (decode.modrm.reg) {
case 0x0: /* test eb,ib */
gen_dop_byte_imm(DOP_TEST,src,src_i,decode_fetchb());
goto skipsave;
case 0x2: /* NOT Eb */
gen_sop_byte(SOP_NOT,src,src_i);
break;
case 0x3: /* NEG Eb */
gen_sop_byte(SOP_NEG,src,src_i);
break;
case 0x4: /* mul Eb */
gen_mul_byte(false,DREG(EAX),src,src_i);
goto skipsave;
case 0x5: /* imul Eb */
gen_mul_byte(true,DREG(EAX),src,src_i);
goto skipsave;
case 0x6: /* div Eb */
case 0x7: /* idiv Eb */
/* EAX could be used, so precache it */
if (decode.modrm.mod==3)
gen_dop_byte(DOP_MOV,DREG(TMPB),0,&DynRegs[decode.modrm.rm&3],decode.modrm.rm&4);
gen_storeflags();gen_releasereg(DREG(EAX));
gen_call_function((decode.modrm.reg==6) ? (void *)&dyn_helper_divb : (void *)&dyn_helper_idivb,
"%Rd%Drl",DREG(TMPB),DREG(TMPB));
gen_dop_word(DOP_OR,true,DREG(TMPB),DREG(TMPB));
branch=gen_create_branch(BR_Z);
dyn_savestate(&state);
dyn_reduce_cycles();
gen_lea(DREG(EIP),DREG(EIP),0,0,decode.op_start-decode.code_start);
dyn_save_flags(true);
dyn_releaseregs();
gen_call_function((void *)&CPU_Exception,"%Id%Id",0,0);
dyn_load_flags();
gen_return(BR_Normal);
dyn_loadstate(&state);
gen_fill_branch(branch);
gen_restoreflags();
goto skipsave;
}
/* Save the result if memory op */
if (decode.modrm.mod<3) dyn_write_byte(DREG(EA),DREG(TMPB),false);
skipsave:
gen_releasereg(DREG(TMPB));gen_releasereg(DREG(EA));
}
static void dyn_grp3_ev(void) {
DynState state;Bit8u * branch;
dyn_get_modrm();DynReg * src;
if (decode.modrm.mod<3) {
dyn_fill_ea();src=DREG(TMPW);
dyn_read_word(DREG(EA),DREG(TMPW),decode.big_op);
} else src=&DynRegs[decode.modrm.rm];
switch (decode.modrm.reg) {
case 0x0: /* test ev,iv */
gen_dop_word_imm(DOP_TEST,decode.big_op,src,decode.big_op ? decode_fetchd() : decode_fetchw());
goto skipsave;
case 0x2: /* NOT Ev */
gen_sop_word(SOP_NOT,decode.big_op,src);
break;
case 0x3: /* NEG Eb */
gen_sop_word(SOP_NEG,decode.big_op,src);
break;
case 0x4: /* mul Eb */
gen_mul_word(false,DREG(EAX),DREG(EDX),decode.big_op,src);
goto skipsave;
case 0x5: /* imul Eb */
gen_mul_word(true,DREG(EAX),DREG(EDX),decode.big_op,src);
goto skipsave;
case 0x6: /* div Eb */
case 0x7: /* idiv Eb */
/* EAX could be used, so precache it */
if (decode.modrm.mod==3)
gen_dop_word(DOP_MOV,decode.big_op,DREG(TMPW),&DynRegs[decode.modrm.rm]);
gen_storeflags();gen_releasereg(DREG(EAX));gen_releasereg(DREG(EDX));
void * func=(decode.modrm.reg==6) ?
(decode.big_op ? (void *)&dyn_helper_divd : (void *)&dyn_helper_divw) :
(decode.big_op ? (void *)&dyn_helper_idivd : (void *)&dyn_helper_idivw);
gen_call_function(func,"%Rd%Drd",DREG(TMPW),DREG(TMPW));
gen_dop_word(DOP_OR,true,DREG(TMPW),DREG(TMPW));
branch=gen_create_branch(BR_Z);
dyn_savestate(&state);
dyn_reduce_cycles();
gen_lea(DREG(EIP),DREG(EIP),0,0,decode.op_start-decode.code_start);
dyn_save_flags(true);
dyn_releaseregs();
gen_call_function((void *)&CPU_Exception,"%Id%Id",0,0);
dyn_load_flags();
gen_return(BR_Normal);
dyn_loadstate(&state);
gen_fill_branch(branch);
gen_restoreflags();
goto skipsave;
}
/* Save the result if memory op */
if (decode.modrm.mod<3) dyn_write_word(DREG(EA),DREG(TMPW),decode.big_op);
skipsave:
gen_releasereg(DREG(TMPW));gen_releasereg(DREG(EA));
}
static void dyn_mov_ev_seg(void) {
dyn_get_modrm();
gen_load_host(&Segs.val[decode.modrm.reg],DREG(TMPW),2);
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_write_word(DREG(EA),DREG(TMPW),false);
gen_releasereg(DREG(EA));
} else {
gen_dop_word(DOP_MOV,decode.big_op,&DynRegs[decode.modrm.rm],DREG(TMPW));
}
gen_releasereg(DREG(TMPW));
}
static void dyn_load_seg(SegNames seg,DynReg * src,bool withpop) {
if (cpu.pmode) {
Bit8u * branch;DynState state;
gen_storeflags();
gen_call_function((void *)&CPU_SetSegGeneral,"%Rd%Id%Drw",DREG(TMPB),seg,src);
gen_dop_byte(DOP_OR,DREG(TMPB),0,DREG(TMPB),0);
branch=gen_create_branch(BR_Z);
dyn_savestate(&state);
dyn_reduce_cycles();
if (withpop) gen_dop_word_imm(DOP_SUB,true,DREG(ESP),decode.big_op ? 4 : 2);
gen_dop_word_imm(DOP_ADD,true,DREG(EIP),decode.op_start-decode.code_start);
dyn_save_flags(true);
dyn_releaseregs();
gen_call_function((void *)&CPU_StartException,"");
dyn_load_flags();
gen_return(BR_Normal);
dyn_loadstate(&state);
gen_fill_branch(branch);
gen_restoreflags();
} else {
//TODO Maybe just calculate the base directly if in realmode
gen_call_function((void *)&CPU_SetSegGeneral,"%Id%Drw",seg,src);
}
gen_releasereg(&DynRegs[G_ES+seg]);
if (seg==ss) gen_releasereg(DREG(SMASK));
}
static void dyn_load_seg_off_ea(SegNames seg) {
dyn_get_modrm();
if (decode.modrm.mod<3) {
dyn_fill_ea();
gen_lea(DREG(TMPW),DREG(EA),0,0,decode.big_op ? 4:2);
dyn_read_word(DREG(TMPW),DREG(TMPW),false);
dyn_load_seg(seg,DREG(TMPW),false);gen_releasereg(DREG(TMPW));
dyn_read_word(DREG(EA),&DynRegs[decode.modrm.reg],decode.big_op);
gen_releasereg(DREG(EA));
} else {
IllegalOption();
}
}
static void dyn_mov_seg_ev(void) {
dyn_get_modrm();
SegNames seg=(SegNames)decode.modrm.reg;
if (seg==cs) IllegalOption();
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_read_word(DREG(EA),DREG(EA),false);
dyn_load_seg(seg,DREG(EA),false);
gen_releasereg(DREG(EA));
} else {
dyn_load_seg(seg,&DynRegs[decode.modrm.rm],false);
}
}
static void dyn_push_seg(SegNames seg) {
gen_load_host(&Segs.val[seg],DREG(TMPW),2);
dyn_push(DREG(TMPW));
gen_releasereg(DREG(TMPW));
}
static void dyn_pop_seg(SegNames seg) {
gen_storeflags();
dyn_pop(DREG(TMPW));
dyn_load_seg(seg,DREG(TMPW),true);
gen_releasereg(DREG(TMPW));
gen_restoreflags();
}
static void dyn_pop_ev(void) {
gen_storeflags();
dyn_pop(DREG(TMPW));
dyn_get_modrm();
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_write_word(DREG(EA),DREG(TMPW),decode.big_op);
gen_releasereg(DREG(EA));
} else {
gen_dop_word(DOP_MOV,decode.big_op,&DynRegs[decode.modrm.rm],DREG(TMPW));
}
gen_releasereg(DREG(TMPW));
gen_restoreflags();
}
static void dyn_leave(void) {
gen_storeflags();
gen_dop_word(DOP_MOV,true,DREG(TMPW),DREG(SMASK));
gen_sop_word(SOP_NOT,true,DREG(TMPW));
gen_dop_word(DOP_AND,true,DREG(ESP),DREG(TMPW));
gen_dop_word(DOP_MOV,true,DREG(TMPW),DREG(EBP));
gen_dop_word(DOP_AND,true,DREG(TMPW),DREG(SMASK));
gen_dop_word(DOP_OR,true,DREG(ESP),DREG(TMPW));
dyn_pop(DREG(EBP));
gen_releasereg(DREG(TMPW));
gen_restoreflags();
}
static void dyn_segprefix(SegNames seg) {
if (decode.segprefix) IllegalOption();
decode.segprefix=&DynRegs[G_ES+seg];
}
static void dyn_closeblock(BlockType type) {
//Shouldn't create empty block normally but let's do it like this
if (decode.code>decode.code_start) decode.code--;
Bitu start_page=decode.code_start >> 12;
Bitu end_page=decode.code>>12;
decode.block->page.start=(Bit16s)decode.code_start & 4095;
decode.block->page.end=(Bit16s)((end_page-start_page)*4096+(decode.code&4095));
cache_closeblock(type);
}
static void dyn_normal_exit(BlockReturn code) {
gen_lea(DREG(EIP),DREG(EIP),0,0,decode.code-decode.code_start);
dyn_reduce_cycles();
dyn_releaseregs();
gen_return(code);
dyn_closeblock(BT_Normal);
}
static void dyn_exit_link(bool dword,Bits eip_change) {
gen_lea(DREG(EIP),DREG(EIP),0,0,(decode.code-decode.code_start)+eip_change);
if (!dword) gen_extend_word(false,DREG(EIP),DREG(EIP));
dyn_reduce_cycles();
dyn_releaseregs();
// gen_return(BR_Normal);
gen_jmp_ptr(&decode.block->link.to[0],offsetof(CacheBlock,cache.start));
dyn_closeblock(BT_SingleLink);
}
static void dyn_branched_exit(BranchTypes btype,Bit32s eip_add) {
dyn_reduce_cycles();
dyn_releaseregs();
Bitu eip_base=decode.code-decode.code_start;
Bit8u * data=gen_create_branch(btype);
/* Branch not taken */
gen_lea(DREG(EIP),DREG(EIP),0,0,eip_base);
gen_releasereg(DREG(EIP));
// gen_return(BR_Normal);
gen_jmp_ptr(&decode.block->link.to[0],offsetof(CacheBlock,cache.start));
gen_fill_branch(data);
/* Branch taken */
gen_lea(DREG(EIP),DREG(EIP),0,0,eip_base+eip_add);
gen_releasereg(DREG(EIP));
// gen_return(BR_Normal);
gen_jmp_ptr(&decode.block->link.to[1],offsetof(CacheBlock,cache.start));
dyn_closeblock(BT_DualLink);
}
enum LoopTypes {
LOOP_NONE,LOOP_NE,LOOP_E,
};
static void dyn_loop(LoopTypes type) {
Bits eip_add=(Bit8s)decode_fetchb();
Bitu eip_base=decode.code-decode.code_start;
gen_storeflags();
dyn_reduce_cycles();
Bit8u * branch1;
Bit8u * branch2=0;
gen_sop_word(SOP_DEC,decode.big_addr,DREG(ECX));
dyn_releaseregs();
branch1=gen_create_branch(BR_Z);
gen_restoreflags(true);
switch (type) {
case LOOP_NONE:
break;
case LOOP_E:
branch2=gen_create_branch(BR_NZ);
break;
case LOOP_NE:
branch2=gen_create_branch(BR_Z);
break;
}
gen_lea(DREG(EIP),DREG(EIP),0,0,eip_base+eip_add);
gen_releasereg(DREG(EIP));
gen_jmp_ptr(&decode.block->link.to[0],offsetof(CacheBlock,cache.start));
gen_fill_branch(branch1);
if (branch2) gen_fill_branch(branch2);
/* Branch taken */
gen_restoreflags();
gen_lea(DREG(EIP),DREG(EIP),0,0,eip_base);
gen_releasereg(DREG(EIP));
gen_jmp_ptr(&decode.block->link.to[1],offsetof(CacheBlock,cache.start));
dyn_closeblock(BT_DualLink);
}
static void dyn_ret_near(Bitu bytes) {
dyn_reduce_cycles();
//TODO maybe AND eip 0xffff, but shouldn't be needed
gen_storeflags();
dyn_pop(DREG(EIP));
if (bytes) gen_dop_word_imm(DOP_ADD,true,DREG(ESP),bytes);
dyn_releaseregs();
gen_restoreflags();
gen_return(BR_Normal);
dyn_closeblock(BT_Normal);
}
static void dyn_ret_far(Bitu bytes) {
dyn_reduce_cycles();
//TODO maybe AND eip 0xffff, but shouldn't be needed
gen_lea(DREG(EIP),DREG(EIP),0,0,decode.code-decode.code_start);
dyn_save_flags();
dyn_releaseregs();
gen_call_function((void*)&CPU_RET,"%Id%Id%Id",decode.big_op,bytes,decode.code-decode.op_start);
dyn_load_flags();
dyn_releaseregs();;
gen_return(BR_Normal);
dyn_closeblock(BT_Normal);
}
static void dyn_call_near_imm(void) {
Bits imm;
if (decode.big_op) imm=(Bit32s)decode_fetchd();
else imm=(Bit16s)decode_fetchw();
gen_lea(DREG(EIP),DREG(EIP),0,0,decode.code-decode.code_start);
dyn_push(DREG(EIP));
gen_lea(DREG(EIP),DREG(EIP),0,0,imm);
if (!decode.big_op) gen_extend_word(false,DREG(EIP),DREG(EIP));
dyn_reduce_cycles();
dyn_releaseregs();
gen_return(BR_Normal);
// gen_jmp_ptr(&decode.block->link.to[0],offsetof(CacheBlock,cache.start));
dyn_closeblock(BT_SingleLink);
}
static void dyn_call_far_imm(void) {
Bitu sel,off;
off=decode.big_op ? decode_fetchd() : decode_fetchw();
sel=decode_fetchw();
dyn_reduce_cycles();
gen_lea(DREG(EIP),DREG(EIP),0,0,decode.code-decode.code_start);
dyn_save_flags();
dyn_releaseregs();
gen_call_function((void*)&CPU_CALL,"%Id%Id%Id%Id",decode.big_op,sel,off,decode.code-decode.op_start);
dyn_load_flags();
dyn_releaseregs();
gen_return(BR_Normal);
dyn_closeblock(BT_Normal);
}
static void dyn_jmp_far_imm(void) {
Bitu sel,off;
off=decode.big_op ? decode_fetchd() : decode_fetchw();
sel=decode_fetchw();
dyn_reduce_cycles();
gen_lea(DREG(EIP),DREG(EIP),0,0,decode.code-decode.code_start);
dyn_save_flags();
dyn_releaseregs();
gen_call_function((void*)&CPU_JMP,"%Id%Id%Id%Id",decode.big_op,sel,off,decode.code-decode.op_start);
dyn_load_flags();
dyn_releaseregs();
gen_return(BR_Normal);
dyn_closeblock(BT_Normal);
}
static void dyn_iret(void) {
dyn_save_flags();
dyn_reduce_cycles();
gen_dop_word_imm(DOP_ADD,true,DREG(EIP),decode.code-decode.code_start);
dyn_releaseregs();
gen_call_function((void*)&CPU_IRET,"%Id%Id",decode.big_op,decode.code-decode.op_start);
dyn_load_flags();
dyn_releaseregs();
gen_return(BR_Normal);
dyn_closeblock(BT_CheckFlags);
}
static void dyn_interrupt(Bitu num) {
dyn_save_flags();
dyn_reduce_cycles();
gen_dop_word_imm(DOP_ADD,true,DREG(EIP),decode.code-decode.code_start);
dyn_releaseregs();
gen_call_function((void*)&CPU_Interrupt,"%Id%Id%Id",num,CPU_INT_SOFTWARE,decode.code-decode.op_start);
dyn_load_flags();
dyn_releaseregs();
gen_return(BR_Normal);
dyn_closeblock(BT_Normal);
}
static CacheBlock * CreateCacheBlock(PhysPt start,bool big,Bitu max_opcodes) {
Bits i;
decode.code_start=start;
decode.code=start;
Bitu cycles=0;
decode.block=cache_openblock();
gen_save_host_direct(&cache.block.running,(Bit32u)decode.block);
for (i=0;i<G_MAX;i++) {
DynRegs[i].flags&=~(DYNFLG_ACTIVE|DYNFLG_CHANGED);
DynRegs[i].genreg=0;
}
gen_reinit();
/* Start with the cycles check */
gen_storeflags();
gen_dop_word_imm(DOP_CMP,true,DREG(CYCLES),0);
Bit8u * cyclebranch=gen_create_branch(BR_NLE);
gen_restoreflags(true);
gen_return(BR_Cycles);
gen_fill_branch(cyclebranch);
gen_releasereg(DREG(CYCLES));
gen_restoreflags();
decode.cycles=0;
while (max_opcodes--) {
/* Init prefixes */
decode.big_addr=big;
decode.big_op=big;
decode.segprefix=0;
decode.rep=REP_NONE;
decode.cycles++;
decode.op_start=decode.code;
restart_prefix:
Bitu opcode=decode_fetchb();
switch (opcode) {
//Add
case 0x00:dyn_dop_ebgb(DOP_ADD);break;
case 0x01:dyn_dop_evgv(DOP_ADD);break;
case 0x02:dyn_dop_gbeb(DOP_ADD);break;
case 0x03:dyn_dop_gvev(DOP_ADD);break;
case 0x04:gen_dop_byte_imm(DOP_ADD,DREG(EAX),0,decode_fetchb());break;
case 0x05:gen_dop_word_imm(DOP_ADD,decode.big_op,DREG(EAX),decode.big_op ? decode_fetchd() : decode_fetchw());break;
case 0x06:dyn_push_seg(es);break;
case 0x07:dyn_pop_seg(es);break;
case 0x08:dyn_dop_ebgb(DOP_OR);break;
case 0x09:dyn_dop_evgv(DOP_OR);break;
case 0x0a:dyn_dop_gbeb(DOP_OR);break;
case 0x0b:dyn_dop_gvev(DOP_OR);break;
case 0x0c:gen_dop_byte_imm(DOP_OR,DREG(EAX),0,decode_fetchb());break;
case 0x0d:gen_dop_word_imm(DOP_OR,decode.big_op,DREG(EAX),decode.big_op ? decode_fetchd() : decode_fetchw());break;
case 0x0e:dyn_push_seg(cs);break;
case 0x0f:
{
Bitu dual_code=decode_fetchb();
switch (dual_code) {
/* Short conditional jumps */
case 0x80:case 0x81:case 0x82:case 0x83:case 0x84:case 0x85:case 0x86:case 0x87:
case 0x88:case 0x89:case 0x8a:case 0x8b:case 0x8c:case 0x8d:case 0x8e:case 0x8f:
dyn_branched_exit((BranchTypes)(dual_code&0xf),
decode.big_op ? (Bit32s)decode_fetchd() : (Bit16s)decode_fetchw());
return decode.block;
/* PUSH/POP FS */
case 0xa0:dyn_push_seg(fs);break;
case 0xa1:dyn_pop_seg(fs);break;
/* SHLD Imm/cl*/
case 0xa4:dyn_dshift_ev_gv(true,true);break;
case 0xa5:dyn_dshift_ev_gv(true,false);break;
/* PUSH/POP GS */
case 0xa8:dyn_push_seg(gs);break;
case 0xa9:dyn_pop_seg(gs);break;
/* SHRD Imm/cl*/
case 0xac:dyn_dshift_ev_gv(false,true);break;
case 0xad:dyn_dshift_ev_gv(false,false);break;
/* Imul Ev,Gv */
case 0xaf:dyn_imul_gvev(0);break;
/* LFS,LGS */
case 0xb4:dyn_load_seg_off_ea(fs);break;
case 0xb5:dyn_load_seg_off_ea(gs);break;
/* MOVZX Gv,Eb/Ew */
case 0xb6:dyn_mov_ev_gb(false);break;
case 0xb7:dyn_mov_ev_gw(false);break;
/* MOVSX Gv,Eb/Ew */
case 0xbe:dyn_mov_ev_gb(true);break;
case 0xbf:dyn_mov_ev_gw(true);break;
default:
DYN_LOG("Unhandled dual opcode 0F%02X",dual_code);
goto illegalopcode;
}
}break;
case 0x10:dyn_dop_ebgb(DOP_ADC);break;
case 0x11:dyn_dop_evgv(DOP_ADC);break;
case 0x12:dyn_dop_gbeb(DOP_ADC);break;
case 0x13:dyn_dop_gvev(DOP_ADC);break;
case 0x14:gen_dop_byte_imm(DOP_ADC,DREG(EAX),0,decode_fetchb());break;
case 0x15:gen_dop_word_imm(DOP_ADC,decode.big_op,DREG(EAX),decode.big_op ? decode_fetchd() : decode_fetchw());break;
case 0x16:dyn_push_seg(ss);break;
case 0x17:dyn_pop_seg(ss);break;
case 0x18:dyn_dop_ebgb(DOP_SBB);break;
case 0x19:dyn_dop_evgv(DOP_SBB);break;
case 0x1a:dyn_dop_gbeb(DOP_SBB);break;
case 0x1b:dyn_dop_gvev(DOP_SBB);break;
case 0x1c:gen_dop_byte_imm(DOP_SBB,DREG(EAX),0,decode_fetchb());break;
case 0x1d:gen_dop_word_imm(DOP_SBB,decode.big_op,DREG(EAX),decode.big_op ? decode_fetchd() : decode_fetchw());break;
case 0x1e:dyn_push_seg(ds);break;
case 0x1f:dyn_pop_seg(ds);break;
case 0x20:dyn_dop_ebgb(DOP_AND);break;
case 0x21:dyn_dop_evgv(DOP_AND);break;
case 0x22:dyn_dop_gbeb(DOP_AND);break;
case 0x23:dyn_dop_gvev(DOP_AND);break;
case 0x24:gen_dop_byte_imm(DOP_AND,DREG(EAX),0,decode_fetchb());break;
case 0x25:gen_dop_word_imm(DOP_AND,decode.big_op,DREG(EAX),decode.big_op ? decode_fetchd() : decode_fetchw());break;
case 0x26:dyn_segprefix(es);goto restart_prefix;
case 0x28:dyn_dop_ebgb(DOP_SUB);break;
case 0x29:dyn_dop_evgv(DOP_SUB);break;
case 0x2a:dyn_dop_gbeb(DOP_SUB);break;
case 0x2b:dyn_dop_gvev(DOP_SUB);break;
case 0x2c:gen_dop_byte_imm(DOP_SUB,DREG(EAX),0,decode_fetchb());break;
case 0x2d:gen_dop_word_imm(DOP_SUB,decode.big_op,DREG(EAX),decode.big_op ? decode_fetchd() : decode_fetchw());break;
case 0x2e:dyn_segprefix(cs);goto restart_prefix;
case 0x30:dyn_dop_ebgb(DOP_XOR);break;
case 0x31:dyn_dop_evgv(DOP_XOR);break;
case 0x32:dyn_dop_gbeb(DOP_XOR);break;
case 0x33:dyn_dop_gvev(DOP_XOR);break;
case 0x34:gen_dop_byte_imm(DOP_XOR,DREG(EAX),0,decode_fetchb());break;
case 0x35:gen_dop_word_imm(DOP_XOR,decode.big_op,DREG(EAX),decode.big_op ? decode_fetchd() : decode_fetchw());break;
case 0x36:dyn_segprefix(ss);goto restart_prefix;
case 0x38:dyn_dop_ebgb(DOP_CMP);break;
case 0x39:dyn_dop_evgv(DOP_CMP);break;
case 0x3a:dyn_dop_gbeb(DOP_CMP);break;
case 0x3b:dyn_dop_gvev(DOP_CMP);break;
case 0x3c:gen_dop_byte_imm(DOP_CMP,DREG(EAX),0,decode_fetchb());break;
case 0x3d:gen_dop_word_imm(DOP_CMP,decode.big_op,DREG(EAX),decode.big_op ? decode_fetchd() : decode_fetchw());break;
case 0x3e:dyn_segprefix(ds);goto restart_prefix;
/* INC/DEC general register */
case 0x40:case 0x41:case 0x42:case 0x43:case 0x44:case 0x45:case 0x46:case 0x47:
gen_sop_word(SOP_INC,decode.big_op,&DynRegs[opcode&7]);
break;
case 0x48:case 0x49:case 0x4a:case 0x4b:case 0x4c:case 0x4d:case 0x4e:case 0x4f:
gen_sop_word(SOP_DEC,decode.big_op,&DynRegs[opcode&7]);
break;
/* PUSH/POP General register */
case 0x50:case 0x51:case 0x52:case 0x53:case 0x55:case 0x56:case 0x57:
dyn_push(&DynRegs[opcode&7]);
break;
case 0x54: /* PUSH SP is special */
gen_dop_word(DOP_MOV,true,DREG(TMPW),DREG(ESP));
dyn_push(DREG(TMPW));
gen_releasereg(DREG(TMPW));
break;
case 0x58:case 0x59:case 0x5a:case 0x5b:case 0x5c:case 0x5d:case 0x5e:case 0x5f:
dyn_pop(&DynRegs[opcode&7]);
break;
case 0x60: /* PUSHA */
gen_storeflags();
gen_dop_word(DOP_MOV,true,DREG(TMPW),DREG(ESP));
for (i=G_EAX;i<=G_EDI;i++) {
dyn_push((i!=G_ESP) ? &DynRegs[i] : DREG(TMPW));
}
gen_restoreflags();
gen_releasereg(DREG(TMPW));
break;
case 0x61: /* POPA */
gen_storeflags();
for (i=G_EDI;i>=G_EAX;i--) {
dyn_pop((i!=G_ESP) ? &DynRegs[i] : DREG(TMPW));
}
gen_restoreflags();gen_releasereg(DREG(TMPW));
break;
//segprefix FS,GS
case 0x64:dyn_segprefix(fs);goto restart_prefix;
case 0x65:dyn_segprefix(gs);goto restart_prefix;
//Push immediates
//Operand size
case 0x66:decode.big_op=!big;goto restart_prefix;
//Address size
case 0x67:decode.big_addr=!big;goto restart_prefix;
case 0x68: /* PUSH Iv */
gen_dop_word_imm(DOP_MOV,decode.big_op,DREG(TMPW),decode.big_op ? decode_fetchd() : decode_fetchw());
dyn_push(DREG(TMPW));
gen_releasereg(DREG(TMPW));
break;
/* Imul Ivx */
case 0x69:dyn_imul_gvev(decode.big_op ? 4 : 2);break;
case 0x6a: /* PUSH Ibx */
gen_dop_word_imm(DOP_MOV,true,DREG(TMPW),(Bit8s)decode_fetchb());
dyn_push(DREG(TMPW));
gen_releasereg(DREG(TMPW));
break;
/* Imul Ibx */
case 0x6b:dyn_imul_gvev(1);break;
/* Short conditional jumps */
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:
dyn_branched_exit((BranchTypes)(opcode&0xf),(Bit8s)decode_fetchb());
return decode.block;
/* Group 1 */
case 0x80:dyn_grp1_eb_ib();break;
case 0x81:dyn_grp1_ev_ivx(false);break;
case 0x82:dyn_grp1_eb_ib();break;
case 0x83:dyn_grp1_ev_ivx(true);break;
/* TEST Gb,Eb Gv,Ev */
case 0x84:dyn_dop_gbeb(DOP_TEST);break;
case 0x85:dyn_dop_gvev(DOP_TEST);break;
/* XCHG Eb,Gb Ev,Gv */
case 0x86:dyn_dop_ebgb(DOP_XCHG);break;
case 0x87:dyn_dop_evgv(DOP_XCHG);break;
/* MOV e,g and g,e */
case 0x88:dyn_mov_ebgb();break;
case 0x89:dyn_mov_evgv();break;
case 0x8a:dyn_mov_gbeb();break;
case 0x8b:dyn_mov_gvev();break;
/* MOV ev,seg */
case 0x8c:dyn_mov_ev_seg();break;
/* LEA Gv */
case 0x8d:
dyn_get_modrm();dyn_fill_ea(false);
gen_dop_word(DOP_MOV,decode.big_op,&DynRegs[decode.modrm.reg],DREG(EA));
gen_releasereg(DREG(EA));
break;
/* Mov seg,ev */
case 0x8e:dyn_mov_seg_ev();break;
/* POP Ev */
case 0x8f:dyn_pop_ev();break;
//NOP
case 0x90:
break;
//XCHG ax,reg
case 0x91:case 0x92:case 0x93:case 0x94:case 0x95:case 0x96:case 0x97:
gen_dop_word(DOP_XCHG,decode.big_op,DREG(EAX),&DynRegs[opcode&07]);
break;
/* CBW/CWDE */
case 0x98:
/*
if (decode.big_op) gen_extend_word(true,DREG(EAX),DREG(EAX));
else gen_extend_byte(true,false,DREG(EAX),DREG(EAX),0);
*/
gen_cbw(decode.big_op,DREG(EAX));
break;
/* CWD/CDQ */
case 0x99:
gen_cwd(decode.big_op,DREG(EAX),DREG(EDX));
break;
/* CALL FAR Ip */
case 0x9a:dyn_call_far_imm();return decode.block;
/* MOV AL,direct addresses */
case 0xa0:
gen_lea(DREG(EA),decode.segprefix ? decode.segprefix : DREG(DS),0,0,
decode.big_addr ? decode_fetchd() : decode_fetchw());
dyn_read_byte(DREG(EA),DREG(EAX),false);
gen_releasereg(DREG(EA));
break;
/* MOV AX,direct addresses */
case 0xa1:
gen_lea(DREG(EA),decode.segprefix ? decode.segprefix : DREG(DS),0,0,
decode.big_addr ? decode_fetchd() : decode_fetchw());
dyn_read_word(DREG(EA),DREG(EAX),decode.big_op);
gen_releasereg(DREG(EA));
break;
/* MOV direct address,AL */
case 0xa2:
gen_lea(DREG(EA),decode.segprefix ? decode.segprefix : DREG(DS),0,0,
decode.big_addr ? decode_fetchd() : decode_fetchw());
dyn_write_byte(DREG(EA),DREG(EAX),false);
gen_releasereg(DREG(EA));
break;
/* MOV direct addresses,AX */
case 0xa3:
gen_lea(DREG(EA),decode.segprefix ? decode.segprefix : DREG(DS),0,0,
decode.big_addr ? decode_fetchd() : decode_fetchw());
dyn_write_word(DREG(EA),DREG(EAX),decode.big_op);
gen_releasereg(DREG(EA));
break;
/* MOVSB/W/D*/
case 0xa4:dyn_string(STR_MOVSB);break;
case 0xa5:dyn_string(decode.big_op ? STR_MOVSD : STR_MOVSW);break;
/* TEST AL,AX Imm */
case 0xa8:gen_dop_byte_imm(DOP_TEST,DREG(EAX),0,decode_fetchb());break;
case 0xa9:gen_dop_word_imm(DOP_TEST,decode.big_op,DREG(EAX),decode.big_op ? decode_fetchd() : decode_fetchw());break;
/* STOSB/W/D*/
case 0xaa:dyn_string(STR_STOSB);break;
case 0xab:dyn_string(decode.big_op ? STR_STOSD : STR_STOSW);break;
/* LODSB/W/D*/
case 0xac:dyn_string(STR_LODSB);break;
case 0xad:dyn_string(decode.big_op ? STR_LODSD : STR_LODSW);break;
//Mov Byte reg,Imm byte
case 0xb0:case 0xb1:case 0xb2:case 0xb3:case 0xb4:case 0xb5:case 0xb6:case 0xb7:
gen_dop_byte_imm(DOP_MOV,&DynRegs[opcode&3],opcode&4,decode_fetchb());
break;
//Mov word reg imm byte,word,
case 0xb8:case 0xb9:case 0xba:case 0xbb:case 0xbc:case 0xbd:case 0xbe:case 0xbf:
gen_dop_word_imm(DOP_MOV,decode.big_op,&DynRegs[opcode&7],decode.big_op ? decode_fetchd() : decode_fetchw());break;
break;
//GRP2 Eb/Ev,Ib
case 0xc0:dyn_grp2_eb(grp2_imm);break;
case 0xc1:dyn_grp2_ev(grp2_imm);break;
//RET near Iw / Ret
case 0xc2:dyn_ret_near(decode_fetchw());return decode.block;
case 0xc3:dyn_ret_near(0);return decode.block;
//LES/LDS
case 0xc4:dyn_load_seg_off_ea(es);break;
case 0xc5:dyn_load_seg_off_ea(ds);break;
// MOV Eb/Ev,Ib/Iv
case 0xc6:dyn_mov_ebib();break;
case 0xc7:dyn_mov_eviv();break;
// LEAVE
case 0xc9:dyn_leave();break;
//RET far Iw / Ret
case 0xca:dyn_ret_far(decode_fetchw());return decode.block;
case 0xcb:dyn_ret_far(0);return decode.block;
/* Interrupt */
case 0xcd:dyn_interrupt(decode_fetchb());return decode.block;
/* IRET */
case 0xcf:dyn_iret();return decode.block;
//GRP2 Eb/Ev,1
case 0xd0:dyn_grp2_eb(grp2_1);break;
case 0xd1:dyn_grp2_ev(grp2_1);break;
//GRP2 Eb/Ev,CL
case 0xd2:dyn_grp2_eb(grp2_cl);break;
case 0xd3:dyn_grp2_ev(grp2_cl);break;
//Loop's
case 0xe2:dyn_loop(LOOP_NONE);return decode.block;
//IN AL/AX,imm
case 0xe4:gen_call_function((void*)&IO_ReadB,"%Id%Rl",decode_fetchb(),DREG(EAX));break;
case 0xe5:
if (decode.big_op) {
gen_call_function((void*)&IO_ReadD,"%Id%Rd",decode_fetchb(),DREG(EAX));
} else {
gen_call_function((void*)&IO_ReadW,"%Id%Rw",decode_fetchb(),DREG(EAX));
}
break;
//OUT imm,AL
case 0xe6:gen_call_function((void*)&IO_WriteB,"%Id%Dl",decode_fetchb(),DREG(EAX));break;
case 0xe7:
if (decode.big_op) {
gen_call_function((void*)&IO_WriteD,"%Id%Dd",decode_fetchb(),DREG(EAX));
} else {
gen_call_function((void*)&IO_WriteW,"%Id%Dw",decode_fetchb(),DREG(EAX));
}
break;
case 0xe8: /* CALL Ivx */
dyn_call_near_imm();
return decode.block;
case 0xe9: /* Jmp Ivx */
dyn_exit_link(decode.big_op,decode.big_op ? (Bit32s)decode_fetchd() : (Bit16s)decode_fetchw());
return decode.block;
/* CALL FAR Ip */
case 0xea:dyn_jmp_far_imm();return decode.block;
/* Jmp Ibx */
case 0xeb:dyn_exit_link(decode.big_op,(Bit8s)decode_fetchb());return decode.block;
/* IN AL/AX,DX*/
case 0xec:gen_call_function((void*)&IO_ReadB,"%Dw%Rl",DREG(EDX),DREG(EAX));break;
case 0xed:
if (decode.big_op) {
gen_call_function((void*)&IO_ReadD,"%Dw%Rd",DREG(EDX),DREG(EAX));
} else {
gen_call_function((void*)&IO_ReadW,"%Dw%Rw",DREG(EDX),DREG(EAX));
}
break;
/* OUT DX,AL/AX */
case 0xee:gen_call_function((void*)&IO_WriteB,"%Dw%Dl",DREG(EDX),DREG(EAX));break;
case 0xef:
if (decode.big_op) {
gen_call_function((void*)&IO_WriteD,"%Dw%Dd",DREG(EDX),DREG(EAX));
} else {
gen_call_function((void*)&IO_WriteW,"%Dw%Dw",DREG(EDX),DREG(EAX));
}
break;
case 0xf2: //REPNE/NZ
decode.rep=REP_NZ;
goto restart_prefix;
case 0xf3: //REPE/Z
decode.rep=REP_Z;
goto restart_prefix;
/* Change carry flag */
case 0xf5: //CMC
case 0xf8: //CLC
case 0xf9: //STC
cache_addb(opcode);break;
/* GRP 3 Eb/EV */
case 0xf6:dyn_grp3_eb();break;
case 0xf7:dyn_grp3_ev();break;
/* Change interrupt flag */
case 0xfa: //CLI
gen_storeflags();
gen_dop_word_imm(DOP_AND,true,DREG(FLAGS),~FLAG_IF);
gen_restoreflags();
break;
case 0xfb: //STI
gen_storeflags();
gen_dop_word_imm(DOP_OR,true,DREG(FLAGS),FLAG_IF);
gen_restoreflags();
if (max_opcodes<=0) max_opcodes=1; //Allow 1 extra opcode
break;
/* GRP 4 Eb and callback's */
case 0xfe:
dyn_get_modrm();
switch (decode.modrm.reg) {
case 0x0://INC Eb
case 0x1://DEC Eb
if (decode.modrm.mod<3) {
dyn_fill_ea();dyn_read_byte(DREG(EA),DREG(TMPB),false);
gen_sop_byte(decode.modrm.reg==0 ? SOP_INC : SOP_DEC,DREG(TMPB),0);
dyn_write_byte(DREG(EA),DREG(TMPB),false);
gen_releasereg(DREG(EA));gen_releasereg(DREG(TMPB));
} else {
gen_sop_byte(decode.modrm.reg==0 ? SOP_INC : SOP_DEC,
&DynRegs[decode.modrm.rm&3],decode.modrm.rm&4);
}
break;
case 0x7: //CALBACK Iw
gen_save_host_direct(&core_dyn.callback,decode_fetchw());
gen_lea(DREG(EIP),DREG(EIP),0,0,decode.code-decode.code_start);
dyn_reduce_cycles();
dyn_releaseregs();
gen_return(BR_CallBack);
dyn_closeblock(BT_Normal);
return decode.block;
}
break;
case 0xff:
{
dyn_get_modrm();DynReg * src;
if (decode.modrm.mod<3) {
dyn_fill_ea();
dyn_read_word(DREG(EA),DREG(TMPW),decode.big_op);
src=DREG(TMPW);
} else src=&DynRegs[decode.modrm.rm];
switch (decode.modrm.reg) {
case 0x0://INC Ev
case 0x1://DEC Ev
gen_sop_word(decode.modrm.reg==0 ? SOP_INC : SOP_DEC,decode.big_op,src);
if (decode.modrm.mod<3){
dyn_write_word(DREG(EA),DREG(TMPW),decode.big_op);
gen_releasereg(DREG(EA));gen_releasereg(DREG(TMPW));
}
break;
case 0x2: /* CALL Ev */
gen_lea(DREG(EIP),DREG(EIP),0,0,decode.code-decode.code_start);
dyn_push(DREG(EIP));
gen_dop_word(DOP_MOV,decode.big_op,DREG(EIP),src);
goto core_close_block;
case 0x4: /* JMP Ev */
gen_dop_word(DOP_MOV,decode.big_op,DREG(EIP),src);
goto core_close_block;
case 0x3: /* CALL Ep */
case 0x5: /* JMP Ep */
dyn_save_flags();
gen_lea(DREG(EA),DREG(EA),0,0,decode.big_op ? 4: 2);
gen_lea(DREG(EIP),DREG(EIP),0,0,decode.code-decode.code_start);
dyn_read_word(DREG(EA),DREG(EA),false);
for (Bitu i=0;i<G_MAX;i++) if (i!= G_EA && i!=G_TMPW) gen_releasereg(&DynRegs[i]);
gen_call_function(
decode.modrm.reg == 3 ? (void*)&CPU_CALL : (void*)&CPU_JMP,
decode.big_op ? (char *)"%Id%Drw%Drd%Id" : (char *)"%Id%Drw%Drw%Id",
decode.big_op,DREG(EA),DREG(TMPW),decode.code-decode.op_start);
dyn_load_flags();
goto core_close_block;
case 0x6: /* PUSH Ev */
dyn_push(src);
break;
default:
IllegalOption();
}}
break;
default:
DYN_LOG("Dynamic unhandled opcode %X",opcode);
goto illegalopcode;
}
}
/* Normal exit because of max opcodes reached */
gen_lea(DREG(EIP),DREG(EIP),0,0,decode.code-decode.code_start);
core_close_block:
dyn_reduce_cycles();
dyn_releaseregs();
gen_return(BR_Normal);
dyn_closeblock(BT_Normal);
return decode.block;
illegalopcode:
decode.code=decode.op_start;
gen_lea(DREG(EIP),DREG(EIP),0,0,decode.code-decode.code_start);
dyn_reduce_cycles();
dyn_releaseregs();
gen_return(BR_Opcode);
dyn_closeblock(BT_Normal);
return decode.block;
}
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