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Formalises what's missing in terms of opcodes and fills in some blanks.

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This commit is contained in:
Thomas Harte 2021-01-05 21:47:12 -05:00
parent 9d7d45338f
commit 17cbba85fc
2 changed files with 31 additions and 5 deletions
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32
Processors/Decoders/x86/x86.cpp
View File

@ -225,7 +225,8 @@ Instruction Decoder::decode(const uint8_t *source, size_t length) {
MapComplete(0xa5, MOVS, None, None, 2);
MapComplete(0xa6, CMPS, None, None, 1);
MapComplete(0xa7, CMPS, None, None, 2);
MapRegData(0xa8, TEST, AL, 1);
MapRegData(0xa9, TEST, AX, 2);
MapComplete(0xaa, STOS, None, None, 1);
MapComplete(0xab, STOS, None, None, 2);
MapComplete(0xac, LODS, None, None, 1);
@ -244,18 +245,22 @@ Instruction Decoder::decode(const uint8_t *source, size_t length) {
MapRegData(0xc2, RETIntra, None, 2);
MapComplete(0xc3, RETIntra, None, None, 2);
MapMemRegReg(0xc4, LES, Reg_MemReg, 4);
MapMemRegReg(0xc5, LDS, Reg_MemReg, 4);
MapRegData(0xca, RETInter, None, 2);
MapComplete(0xcb, RETInter, None, None, 4);
MapComplete(0xcc, INT3, None, None, 0);
MapRegData(0xcd, INT, None, 1);
MapComplete(0xce, INTO, None, None, 0);
MapComplete(0xcf, IRET, None, None, 0);
MapRegData(0xd4, AAM, None, 1);
MapRegData(0xd5, AAD, None, 1);
MapComplete(0xd7, XLAT, None, None, 1);
MapMemRegReg(0xd8, ESC, MemReg_Reg, 0);
MapMemRegReg(0xd9, ESC, MemReg_Reg, 0);
MapMemRegReg(0xda, ESC, MemReg_Reg, 0);
@ -265,23 +270,44 @@ Instruction Decoder::decode(const uint8_t *source, size_t length) {
MapMemRegReg(0xde, ESC, MemReg_Reg, 0);
MapMemRegReg(0xdf, ESC, MemReg_Reg, 0);
MapJump(0xe0, LOOPNE); MapJump(0xe1, LOOPE);
MapJump(0xe2, LOOP); MapJump(0xe3, JPCX);
MapRegAddr(0xe4, IN, AL, 1, 1); MapRegAddr(0xe5, IN, AX, 2, 1);
MapAddrReg(0xe6, OUT, AL, 1, 1); MapAddrReg(0xe7, OUT, AX, 2, 1);
MapRegData(0xe8, CALL, None, 2);
MapRegData(0xe9, JMP, None, 2);
MapFar(0xea, JMP);
MapJump(0xeb, JMP);
MapComplete(0xec, IN, DX, AL, 1); MapComplete(0xed, IN, DX, AX, 1);
MapComplete(0xee, OUT, AL, DX, 1); MapComplete(0xef, OUT, AX, DX, 1);
MapComplete(0xf4, HLT, None, None, 1);
MapComplete(0xf5, CMC, None, None, 1);
MapMemRegReg(0xf6, Invalid, MemRegTEST_to_IDIV, 1);
MapMemRegReg(0xf7, Invalid, MemRegTEST_to_IDIV, 2);
MapComplete(0xf8, CLC, None, None, 1);
MapComplete(0xf9, STC, None, None, 1);
MapComplete(0xfa, CLI, None, None, 1);
MapComplete(0xfb, STI, None, None, 1);
MapComplete(0xfc, CLD, None, None, 1);
MapComplete(0xfd, STD, None, None, 1);
/*
Unimplemented (but should be):
0x8e, 0x8f,
0xc6, 0xc7,
0xd0, 0xd1, 0xd2, 0xd3,
0xfe, 0xff
[and consider which others are unused but seem to be
known to consume a second byte?]
*/
// Other prefix bytes.
case 0xf0: lock_ = true; break;
case 0xf2: repetition_ = Repetition::RepNE; break;

4
Processors/Decoders/x86/x86.hpp
View File

@ -25,7 +25,7 @@ enum class Operation: uint8_t {
AAA, AAD, AAM, AAS, ADC, ADD, AND, CALL, CBW, CLC, CLD, CLI, CMC,
CMP, CMPS, CWD, DAA, DAS, DEC, DIV, ESC, HLT, IDIV, IMUL, IN,
INC, INT, INTO, IRET,
INC, INT, INT3, INTO, IRET,
JO, JNO,
JB, JNB,
JE, JNE,
@ -40,7 +40,7 @@ enum class Operation: uint8_t {
POP, POPF, PUSH, PUSHF, RCL, RCR, REP, ROL, ROR, SAHF,
SAR, SBB, SCAS, SHL, SHR, STC, STD, STI, STOS, SUB, TEST,
WAIT, XCHG, XLAT, XOR,
LES,
LES, LOOP, JPCX,
RETInter,
RETIntra,