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[SOFT386]

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Implement PUSHA and POPA.


svn path=/branches/ntvdm/; revision=60049
This commit is contained in:
Aleksandar Andrejevic 2013-09-11 23:31:35 +00:00
parent f092154985
commit 76b87315a8
1 changed files with 80 additions and 6 deletions
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86
lib/soft386/opcodes.c
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@ -3485,18 +3485,92 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeAas)
SOFT386_OPCODE_HANDLER(Soft386OpcodePushAll) SOFT386_OPCODE_HANDLER(Soft386OpcodePushAll)
{ {
// TODO: NOT IMPLEMENTED INT i;
UNIMPLEMENTED; BOOLEAN Size = State->SegmentRegs[SOFT386_REG_CS].Size;
SOFT386_REG SavedEsp = State->GeneralRegs[SOFT386_REG_ESP];
return FALSE; /* Make sure this is the right instruction */
ASSERT(Opcode == 0x60);
if (State->PrefixFlags == SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
else
{
/* Invalid prefix */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
/* Push all the registers in order */
for (i = 0; i < SOFT386_NUM_GEN_REGS; i++)
{
if (i == SOFT386_REG_ESP)
{
/* Use the saved ESP instead */
if (!Soft386StackPush(State, Size ? SavedEsp.Long : SavedEsp.LowWord))
{
/* Exception occurred */
return FALSE;
}
}
else
{
/* Push the register */
if (!Soft386StackPush(State, Size ? State->GeneralRegs[i].Long
: State->GeneralRegs[i].LowWord))
{
/* Exception occurred */
return FALSE;
}
}
}
return TRUE;
} }
SOFT386_OPCODE_HANDLER(Soft386OpcodePopAll) SOFT386_OPCODE_HANDLER(Soft386OpcodePopAll)
{ {
// TODO: NOT IMPLEMENTED INT i;
UNIMPLEMENTED; BOOLEAN Size = State->SegmentRegs[SOFT386_REG_CS].Size;
ULONG Value;
return FALSE; /* Make sure this is the right instruction */
ASSERT(Opcode == 0x61);
if (State->PrefixFlags == SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
else
{
/* Invalid prefix */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
/* Pop all the registers in reverse order */
for (i = SOFT386_NUM_GEN_REGS - 1; i >= 0; i--)
{
/* Pop the value */
if (!Soft386StackPop(State, &Value))
{
/* Exception occurred */
return FALSE;
}
/* Don't modify ESP */
if (i != SOFT386_REG_ESP)
{
if (Size) State->GeneralRegs[i].Long = Value;
else State->GeneralRegs[i].LowWord = LOWORD(Value);
}
}
return TRUE;
} }
SOFT386_OPCODE_HANDLER(Soft386OpcodeBound) SOFT386_OPCODE_HANDLER(Soft386OpcodeBound)