Cleaned up a load of comments.
Support for pmode related instructions to switch to other core. Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1038
This commit is contained in:
Sjoerd van der Berg
parent
f92993a121
commit
a8132aee39
2 changed files with 132 additions and 120 deletions
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@ -17,8 +17,55 @@
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*/
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switch (Fetchb()) {
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case 0x01: /* Group 7 Ed */
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{
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GetRM;Bitu which=(rm>>3)&7;
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if (rm < 0xc0) { //First ones all use EA
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GetEAa;Bitu limit,base;
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switch (which) {
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case 0x00: /* SGDT */
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CPU_SGDT(limit,base);
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SaveMw(eaa,limit);
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SaveMd(eaa+2,base);
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break;
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case 0x01: /* SIDT */
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CPU_SIDT(limit,base);
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SaveMw(eaa,limit);
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SaveMd(eaa+2,base);
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break;
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case 0x02: /* LGDT */
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CPU_LGDT(LoadMw(eaa),LoadMd(eaa+2));
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break;
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case 0x03: /* LIDT */
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CPU_LIDT(LoadMw(eaa),LoadMd(eaa+2));
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break;
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case 0x04: /* SMSW */
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CPU_SMSW(limit);
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SaveMw(eaa,limit);
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break;
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case 0x06: /* LMSW */
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limit=LoadMw(eaa);
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if (!CPU_LMSW(limit)) goto decode_end;
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break;
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}
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} else {
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GetEArw;Bitu limit;
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switch (which) {
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case 0x04: /* SMSW */
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CPU_SMSW(limit);
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*earw=limit;
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break;
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case 0x06: /* LMSW */
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if (!CPU_LMSW(*earw)) goto decode_end;
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break;
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default:
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LOG(LOG_CPU,LOG_ERROR)("Illegal group 7 RM subfunction %d",which);
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break;
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}
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}
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}
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break;
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case 0xa4: /* SHLD Ed,Gd,Ib */
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{
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GetRMrd;
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@ -19,95 +19,96 @@
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switch(Fetchb()) {
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case 0x00: /* GRP 6 */
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{
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EXCEPTION(6);
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break;
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GetRM;
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switch (rm & 0x38) {
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case 0x00:
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default:
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E_Exit("CPU:GRP6:Illegal call %2X",(rm>>3) &3);
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}
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}
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break;
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case 0x01: /* GRP 7 */
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{
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GetRM;
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switch (rm & 0x38) {
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case 0x20: /* SMSW */
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/* Let's seriously fake this call */
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if (rm>0xc0) {GetEArw;*earw=0;}
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else {GetEAa;SaveMw(eaa,0);}
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GetRM;Bitu which=(rm>>3)&7;
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switch (which) {
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case 0x00: /* SLDT */
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case 0x01: /* STR */
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{
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Bitu saveval;
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if (!which) CPU_SLDT(saveval);
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else CPU_STR(saveval);
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if (rm>0xc0) {GetEArw;*earw=saveval;}
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else {GetEAa;SaveMw(eaa,saveval);}
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}
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break;
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case 0x02:case 0x03:case 0x04:case 0x05:
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{
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Bitu loadval;
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if (rm >= 0xc0 ) {GetEArw;loadval=*earw;}
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else {GetEAa;loadval=LoadMw(eaa);}
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break;
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switch (which) {
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case 0x02:CPU_LLDT(loadval);break;
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case 0x03:CPU_LTR(loadval);break;
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case 0x04:CPU_VERR(loadval);break;
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case 0x05:CPU_VERW(loadval);break;
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}
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}
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default:
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GetEAa;
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LOG(LOG_CPU,LOG_ERROR)("GRP7:Illegal call %2X",(rm>>3) &3);
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LOG(LOG_CPU,LOG_ERROR)("GRP6:Illegal call %2X",which);
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}
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}
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break;
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case 0x01: /* Group 7 Ew */
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{
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GetRM;Bitu which=(rm>>3)&7;
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if (rm < 0xc0) { //First ones all use EA
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GetEAa;Bitu limit,base;
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switch (which) {
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case 0x00: /* SGDT */
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CPU_SGDT(limit,base);
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SaveMw(eaa,limit);
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SaveMd(eaa+2,base);
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break;
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case 0x01: /* SIDT */
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CPU_SIDT(limit,base);
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SaveMw(eaa,limit);
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SaveMd(eaa+2,base);
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break;
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case 0x02: /* LGDT */
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CPU_LGDT(LoadMw(eaa),LoadMd(eaa+2) & 0xFFFFFF);
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break;
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case 0x03: /* LIDT */
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CPU_LIDT(LoadMw(eaa),LoadMd(eaa+2) & 0xFFFFFF);
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break;
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case 0x04: /* SMSW */
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CPU_SMSW(limit);
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SaveMw(eaa,limit);
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break;
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case 0x06: /* LMSW */
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limit=LoadMw(eaa);
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if (!CPU_LMSW(limit)) goto decode_end;
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break;
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}
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} else {
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GetEArw;Bitu limit;
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switch (which) {
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case 0x04: /* SMSW */
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CPU_SMSW(limit);
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*earw=limit;
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break;
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case 0x06: /* LMSW */
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if (!CPU_LMSW(*earw)) goto decode_end;
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break;
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default:
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LOG(LOG_CPU,LOG_ERROR)("Illegal group 7 RM subfunction %d",which);
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break;
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}
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}
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}
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break;
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/* 0x02 LAR Gw,Ew (286) */
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/* 0x03 LSL Gw,Ew (286) */
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/* 0x05 LOADALL (286 only?) */
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/* 0x06 CLTS (286) */
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/* 0x07 LOADALL (386 only?) */
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/* 0x08 INVD (486) */
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/* 0x02 WBINVD (486) */
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/* 0x10 UMOV Eb,Gb (386) */
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/* 0x11 UMOV Ew,Gw (386) */
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/* 0x12 UMOV Gb,Eb (386) */
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/* 0x13 UMOV Gw,Ew (386) */
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/* 0x20 MOV Rd,CRx (386) */
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/* 0x21 MOV Rd,DRx (386) */
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/* 0x22 MOV CRx,Rd (386) */
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/* 0x23 MOV DRx,Rd (386) */
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case 0x23: /* MOV DRx,Rd */
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{
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GetRM;
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LOG(LOG_CPU,LOG_NORMAL)("CPU:0F:23 does nothing");
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Bitu which=(rm >> 3) & 7;
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if (rm >= 0xc0 ) {
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GetEArw;
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} else {
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GetEAa;
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LOG(LOG_CPU,LOG_ERROR)("MOV DR%,XXX with non-register",which);
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}
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}
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break;
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/* 0x24 MOV Rd,TRx (386) */
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/* 0x26 MOV TRx,Rd (386) */
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/* 0x30 WRMSR (P5) */
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/* 0x31 RDTSC (P5) */
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/* 0x32 RDMSR (P5) */
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/* 0x33 RDPMC (P6) */
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/* 0x40-4F CMOVcc Gw,Ew (P6) */
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/* 0x50 PAVEB Rq,Eq (CYRIX MMX) */
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/* 0x51 PADDSIW Rq,Eq (CYRIX MMX) */
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/* 0x52 PMAGW Rq,Eq (CYRIX MMX) */
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/* 0x54 PDISTIB Rq,Eq (CYRIX MMX) */
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/* 0x55 PSUBSIW Rq,Eq (CYRIX MMX) */
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/* 0x58 PMVZB Rq,Eq (CYRIX MMX) */
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/* 0x59 PMULHRW Rq,Eq (CYRIX MMX) */
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/* 0x5A PMVNZB Rq,Eq (CYRIX MMX) */
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/* 0x5B PMVLZB Rq,Eq (CYRIX MMX) */
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/* 0x5C PMVGEZB Rq,Eq (CYRIX MMX) */
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/* 0x5D PMULHRIW Rq,Eq (CYRIX MMX) */
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/* 0x5E PMACHRIW Rq,Eq (CYRIX MMX) */
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/* 0x60 PUNPCKLBW Rq,Eq (MMX) */
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/* 0x61 PUNPCKLWD Rq,Eq (MMX) */
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/* 0x62 PUNPCKLDQ Rq,Eq (MMX) */
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/* 0x63 PACKSSWB Rq,Eq (MMX) */
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/* 0x64 PCMPGTB Rq,Eq (MMX) */
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/* 0x65 PCMPGTW Rq,Eq (MMX) */
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/* 0x66 PCMPGTD Rq,Eq (MMX) */
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/* 0x67 PACKUSWB Rq,Eq (MMX) */
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/* 0x68 PUNPCKHBW Rq,Eq (MMX) */
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/* 0x69 PUNPCKHWD Rq,Eq (MMX) */
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/* 0x6A PUNPCKHDQ Rq,Eq (MMX) */
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/* 0x6B PACKSSDW Rq,Eq (MMX) */
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/* 0x6E MOVD Rq,Ed (MMX) */
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/* 0x6F MOVQ Rq,Eq (MMX) */
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/* 0x71 PSLLW/PSRAW/PSRLW Rq,Ib (MMX) */
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/* 0x72 PSLLD/PSRAD/PSRLD Rq,Ib (MMX) */
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/* 0x73 PSLLQ/PSRLQ Rq,Ib (MMX) */
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/* 0x74 PCMPEQB Rq,Eq (MMX) */
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/* 0x75 PCMPEQW Rq,Eq (MMX) */
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/* 0x76 PCMPEQD Rq,Eq (MMX) */
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/* 0x77 EMMS (MMX) */
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/* 0x7E MOVD Ed,Rq (MMX) */
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/* 0x7F MOVQ Ed,Rq (MMX) */
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case 0x80: /* JO */
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JumpSIw(get_OF());break;
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case 0x81: /* JNO */
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@ -178,7 +179,9 @@ switch(Fetchb()) {
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Push_16(SegValue(fs));break;
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case 0xa1: /* POP FS */
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SegSet16(fs,Pop_16());break;
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/* 0xa2 CPUID */
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case 0xa2:
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CPU_CPUID();
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break;
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case 0xa3: /* BT Ew,Gw */
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{
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GetRMrw;
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@ -199,13 +202,10 @@ switch(Fetchb()) {
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case 0xa5: /* SHLD Ew,Gw,CL */
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RMEwGwOp3(DSHLW,reg_cl);
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break;
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/* 0xa6 XBTS (early 386 only) CMPXCHG (early 486 only) */
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/* 0xa7 IBTS (early 386 only) CMPXCHG (early 486 only) */
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case 0xa8: /* PUSH GS */
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Push_16(SegValue(gs));break;
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case 0xa9: /* POP GS */
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SegSet16(gs,Pop_16());break;
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/* 0xaa RSM */
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case 0xab: /* BTS Ew,Gw */
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{
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GetRMrw;
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@ -231,9 +231,7 @@ switch(Fetchb()) {
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case 0xaf: /* IMUL Gw,Ew */
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RMGwEwOp3(DIMULW,*rmrw);
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break;
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/* 0xb0 CMPXCHG Eb,Gb */
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/* 0xb1 CMPXCHG Ew,Gw */
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case 0xb2: /* LSS */
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{
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GetRMrw;GetEAa;
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@ -385,10 +383,6 @@ switch(Fetchb()) {
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else {GetEAa;*rmrw=LoadMbs(eaa);}
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break;
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}
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/* 0xc0 XADD Eb,Gb (486) */
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/* 0xc1 XADD Ew,Gw (486) */
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/* 0xc7 CMPXCHG8B Mq (P5) */
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/* 0xc8-cf BSWAP Rw (odd behavior,486) */
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case 0xc8: BSWAP(reg_eax); break;
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case 0xc9: BSWAP(reg_ecx); break;
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case 0xca: BSWAP(reg_edx); break;
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@ -398,35 +392,6 @@ switch(Fetchb()) {
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case 0xce: BSWAP(reg_esi); break;
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case 0xcf: BSWAP(reg_edi); break;
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/* 0xd1 PSRLW Rq,Eq (MMX) */
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/* 0xd2 PSRLD Rq,Eq (MMX) */
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/* 0xd3 PSRLQ Rq,Eq (MMX) */
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/* 0xd5 PMULLW Rq,Eq (MMX) */
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/* 0xd8 PSUBUSB Rq,Eq (MMX) */
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/* 0xd9 PSUBUSW Rq,Eq (MMX) */
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/* 0xdb PAND Rq,Eq (MMX) */
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/* 0xdc PADDUSB Rq,Eq (MMX) */
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/* 0xdd PADDUSW Rq,Eq (MMX) */
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/* 0xdf PANDN Rq,Eq (MMX) */
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/* 0xe1 PSRAW Rq,Eq (MMX) */
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/* 0xe2 PSRAD Rq,Eq (MMX) */
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/* 0xe5 PMULHW Rq,Eq (MMX) */
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/* 0xe8 PSUBSB Rq,Eq (MMX) */
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/* 0xe9 PSUBSW Rq,Eq (MMX) */
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/* 0xeb POR Rq,Eq (MMX) */
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/* 0xec PADDSB Rq,Eq (MMX) */
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/* 0xed PADDSW Rq,Eq (MMX) */
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/* 0xef PXOR Rq,Eq (MMX) */
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/* 0xf1 PSLLW Rq,Eq (MMX) */
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/* 0xf2 PSLLD Rq,Eq (MMX) */
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/* 0xf3 PSLLQ Rq,Eq (MMX) */
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/* 0xf5 PMADDWD Rq,Eq (MMX) */
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/* 0xf8 PSUBB Rq,Eq (MMX) */
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/* 0xf9 PSUBW Rq,Eq (MMX) */
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/* 0xfa PSUBD Rq,Eq (MMX) */
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/* 0xfc PADDB Rq,Eq (MMX) */
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/* 0xfd PADDW Rq,Eq (MMX) */
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/* 0xfe PADDD Rq,Eq (MMX) */
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default:
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SUBIP(1);
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E_Exit("CPU:Opcode 0F:%2X Unhandled",Fetchb());
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