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Add the easiest 80386 extensions: PUSH/POP FS/GS and longer conditional jumps.

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This commit is contained in:
Thomas Harte 2022-03-05 17:32:21 -05:00
parent 6432521b9d
commit 7a79111767
1 changed files with 20 additions and 5 deletions
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25
InstructionSets/x86/Decoder.cpp
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@ -433,18 +433,33 @@ std::pair<int, typename Decoder<model>::InstructionT> Decoder<model>::decode(con
// 0x24: MOV Td, Rd
// 0x26: MOV Rd, Td
// 0x8x: long-displacement jumps: JO, JNO, JB, JNB, JZ, JNZ, JBE, JNBE, JS, JNS, JP, JNP, JL, JNL, JLE, JNLE
case 0x70: RequiresMin(i80386); Jump(JO, data_size_); break;
case 0x71: RequiresMin(i80386); Jump(JNO, data_size_); break;
case 0x72: RequiresMin(i80386); Jump(JB, data_size_); break;
case 0x73: RequiresMin(i80386); Jump(JNB, data_size_); break;
case 0x74: RequiresMin(i80386); Jump(JE, data_size_); break;
case 0x75: RequiresMin(i80386); Jump(JNE, data_size_); break;
case 0x76: RequiresMin(i80386); Jump(JBE, data_size_); break;
case 0x77: RequiresMin(i80386); Jump(JNBE, data_size_); break;
case 0x78: RequiresMin(i80386); Jump(JS, data_size_); break;
case 0x79: RequiresMin(i80386); Jump(JNS, data_size_); break;
case 0x7a: RequiresMin(i80386); Jump(JP, data_size_); break;
case 0x7b: RequiresMin(i80386); Jump(JNP, data_size_); break;
case 0x7c: RequiresMin(i80386); Jump(JL, data_size_); break;
case 0x7d: RequiresMin(i80386); Jump(JNL, data_size_); break;
case 0x7e: RequiresMin(i80386); Jump(JLE, data_size_); break;
case 0x7f: RequiresMin(i80386); Jump(JNLE, data_size_); break;
// [0x90, 0x97]: byte set on condition Eb: SETO, SETNO, SETB, SETNB, SETZ, SETNZ, SETBE, SETNBE
// [0x98, 0x9f]: SETS, SETNS, SETP, SETNP, SETL, SETNL, SETLE, SETNLE
// 0xa0: PUSH FS
// 0xa1: POP FS
case 0xa0: RequiresMin(i80386); Complete(PUSH, FS, None, data_size_); break;
case 0xa1: RequiresMin(i80386); Complete(POP, FS, None, data_size_); break;
// 0xa3: BT Ev, Gv
// 0xa4: SHLD EvGvIb
// 0xa5: SHLD EvGcCL
// 0xa8: PUSH GS
// 0xa9: POP GS
case 0xa8: RequiresMin(i80386); Complete(PUSH, GS, None, data_size_); break;
case 0xa9: RequiresMin(i80386); Complete(POP, GS, None, data_size_); break;
// 0xab: BTS Ev, Gv
// 0xac: SHRD EvGvIb
// 0xad: SHRD EvGvCL