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[SOFT386]

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Implement LAHF, SAHF, LEA and PUSH imm16/32


svn path=/branches/ntvdm/; revision=60144
This commit is contained in:
Aleksandar Andrejevic 2013-09-15 18:02:41 +00:00
parent e1e34dc171
commit 99dd92ffa0
1 changed files with 110 additions and 10 deletions
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120
lib/soft386/opcodes.c
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@ -3627,10 +3627,49 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeArpl)
SOFT386_OPCODE_HANDLER(Soft386OpcodePushImm)
{
// TODO: NOT IMPLEMENTED
UNIMPLEMENTED;
BOOLEAN Size = State->SegmentRegs[SOFT386_REG_CS].Size;
return FALSE;
/* Make sure this is the right instruction */
ASSERT(Opcode == 0x68);
if (State->PrefixFlags == SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
else
{
/* Invalid prefix */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
if (Size)
{
ULONG Data;
if (!Soft386FetchDword(State, &Data))
{
/* Exception occurred */
return FALSE;
}
/* Call the internal API */
return Soft386StackPush(State, Data);
}
else
{
USHORT Data;
if (!Soft386FetchWord(State, &Data))
{
/* Exception occurred */
return FALSE;
}
/* Call the internal API */
return Soft386StackPush(State, Data);
}
}
SOFT386_OPCODE_HANDLER(Soft386OpcodeImulModrmImm)
@ -3645,6 +3684,9 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodePushByteImm)
{
UCHAR Data;
/* Make sure this is the right instruction */
ASSERT(Opcode == 0x6A);
if (!Soft386FetchByte(State, &Data))
{
/* Exception occurred */
@ -3811,10 +3853,57 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeMovStoreSeg)
SOFT386_OPCODE_HANDLER(Soft386OpcodeLea)
{
// TODO: NOT IMPLEMENTED
UNIMPLEMENTED;
SOFT386_MOD_REG_RM ModRegRm;
BOOLEAN OperandSize, AddressSize;
return FALSE;
/* Make sure this is the right instruction */
ASSERT(Opcode == 0x8D);
OperandSize = AddressSize = State->SegmentRegs[SOFT386_REG_CS].Size;
if (State->PrefixFlags & SOFT386_PREFIX_ADSIZE)
{
/* The ADSIZE prefix toggles the address size */
AddressSize = !AddressSize;
}
if (State->PrefixFlags & SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the operand size */
OperandSize = !OperandSize;
}
/* Get the operands */
if (!Soft386ParseModRegRm(State, AddressSize, &ModRegRm))
{
/* Exception occurred */
return FALSE;
}
/* The second operand must be memory */
if (!ModRegRm.Memory)
{
/* Invalid */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
/* Write the address to the register */
if (OperandSize)
{
return Soft386WriteModrmDwordOperands(State,
&ModRegRm,
TRUE,
ModRegRm.MemoryAddress);
}
else
{
return Soft386WriteModrmWordOperands(State,
&ModRegRm,
TRUE,
ModRegRm.MemoryAddress);
}
}
SOFT386_OPCODE_HANDLER(Soft386OpcodeMovLoadSeg)
@ -3936,16 +4025,27 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodePopFlags)
SOFT386_OPCODE_HANDLER(Soft386OpcodeSahf)
{
// TODO: NOT IMPLEMENTED
UNIMPLEMENTED;
/* Make sure this is the right instruction */
ASSERT(Opcode == 0x9E);
/* Set the low-order byte of FLAGS to AH */
State->Flags.Long &= 0xFFFFFF00;
State->Flags.Long |= State->GeneralRegs[SOFT386_REG_EAX].HighByte;
/* Restore the reserved bits of FLAGS */
State->Flags.AlwaysSet = TRUE;
State->Flags.Reserved0 = State->Flags.Reserved1 = FALSE;
return FALSE;
}
SOFT386_OPCODE_HANDLER(Soft386OpcodeLahf)
{
// TODO: NOT IMPLEMENTED
UNIMPLEMENTED;
/* Make sure this is the right instruction */
ASSERT(Opcode == 0x9F);
/* Set AH to the low-order byte of FLAGS */
State->GeneralRegs[SOFT386_REG_EAX].HighByte = LOBYTE(State->Flags.Long);
return FALSE;
}