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[SOFT386]

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Implement the following instructions:
PUSH reg16/reg32
POP reg16/reg32


svn path=/branches/ntvdm/; revision=59816
This commit is contained in:
Aleksandar Andrejevic 2013-08-25 12:17:24 +00:00
parent fffdba9eb5
commit 5a86737e91
2 changed files with 84 additions and 16 deletions
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84
lib/soft386/opcodes.c
View file

@ -104,22 +104,22 @@ Soft386OpcodeHandlers[SOFT386_NUM_OPCODE_HANDLERS] =
Soft386OpcodeDecrement,
Soft386OpcodeDecrement,
Soft386OpcodeDecrement,
NULL, // TODO: OPCODE 0x50 NOT SUPPORTED
NULL, // TODO: OPCODE 0x51 NOT SUPPORTED
NULL, // TODO: OPCODE 0x52 NOT SUPPORTED
NULL, // TODO: OPCODE 0x53 NOT SUPPORTED
NULL, // TODO: OPCODE 0x54 NOT SUPPORTED
NULL, // TODO: OPCODE 0x55 NOT SUPPORTED
NULL, // TODO: OPCODE 0x56 NOT SUPPORTED
NULL, // TODO: OPCODE 0x57 NOT SUPPORTED
NULL, // TODO: OPCODE 0x58 NOT SUPPORTED
NULL, // TODO: OPCODE 0x59 NOT SUPPORTED
NULL, // TODO: OPCODE 0x5A NOT SUPPORTED
NULL, // TODO: OPCODE 0x5B NOT SUPPORTED
NULL, // TODO: OPCODE 0x5C NOT SUPPORTED
NULL, // TODO: OPCODE 0x5D NOT SUPPORTED
NULL, // TODO: OPCODE 0x5E NOT SUPPORTED
NULL, // TODO: OPCODE 0x5F NOT SUPPORTED
Soft386OpcodePushReg,
Soft386OpcodePushReg,
Soft386OpcodePushReg,
Soft386OpcodePushReg,
Soft386OpcodePushReg,
Soft386OpcodePushReg,
Soft386OpcodePushReg,
Soft386OpcodePushReg,
Soft386OpcodePopReg,
Soft386OpcodePopReg,
Soft386OpcodePopReg,
Soft386OpcodePopReg,
Soft386OpcodePopReg,
Soft386OpcodePopReg,
Soft386OpcodePopReg,
Soft386OpcodePopReg,
NULL, // TODO: OPCODE 0x60 NOT SUPPORTED
NULL, // TODO: OPCODE 0x61 NOT SUPPORTED
NULL, // TODO: OPCODE 0x62 NOT SUPPORTED
@ -534,3 +534,55 @@ Soft386OpcodeDecrement(PSOFT386_STATE State, UCHAR Opcode)
/* Return success */
return TRUE;
}
BOOLEAN
FASTCALL
Soft386OpcodePushReg(PSOFT386_STATE State, UCHAR Opcode)
{
if ((State->PrefixFlags != SOFT386_PREFIX_OPSIZE)
&& (State->PrefixFlags != 0))
{
/* Invalid prefix */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
/* Make sure this is the right instruction */
ASSERT((Opcode & 0xF8) == 0x50);
/* Call the internal function */
return Soft386StackPush(State, State->GeneralRegs[Opcode & 0x07].Long);
}
BOOLEAN
FASTCALL
Soft386OpcodePopReg(PSOFT386_STATE State, UCHAR Opcode)
{
ULONG Value;
BOOLEAN Size = State->SegmentRegs[SOFT386_REG_SS].Size;
if (State->PrefixFlags == SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
else if (State->PrefixFlags != 0)
{
/* Invalid prefix */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
/* Make sure this is the right instruction */
ASSERT((Opcode & 0xF8) == 0x58);
/* Call the internal function */
if (!Soft386StackPop(State, &Value)) return FALSE;
/* Store the value */
if (Size) State->GeneralRegs[Opcode & 0x07].Long = Value;
else State->GeneralRegs[Opcode & 0x07].LowWord = Value;
/* Return success */
return TRUE;
}

16
lib/soft386/opcodes.h
View file

@ -47,4 +47,20 @@ Soft386OpcodeDecrement
UCHAR Opcode
);
BOOLEAN
FASTCALL
Soft386OpcodePushReg
(
PSOFT386_STATE State,
UCHAR Opcode
);
BOOLEAN
FASTCALL
Soft386OpcodePopReg
(
PSOFT386_STATE State,
UCHAR Opcode
);
#endif // _OPCODES_H_