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[FAST486]

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Superfluous prefixes don't usually generate #UD, except for LOCK.


svn path=/trunk/; revision=67702
This commit is contained in:
Aleksandar Andrejevic 2015-05-12 20:08:39 +00:00
parent 1e3adf9e73
commit 84ed5d3cf2
1 changed files with 8 additions and 48 deletions
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56
reactos/lib/fast486/opcodes.c
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@ -1046,12 +1046,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeMovByteRegImm)
/* Make sure this is the right instruction */ /* Make sure this is the right instruction */
ASSERT((Opcode & 0xF8) == 0xB0); ASSERT((Opcode & 0xF8) == 0xB0);
if (State->PrefixFlags != 0) NO_LOCK_PREFIX();
{
/* Invalid prefix */
Fast486Exception(State, FAST486_EXCEPTION_UD);
return;
}
/* Fetch the byte */ /* Fetch the byte */
if (!Fast486FetchByte(State, &Value)) if (!Fast486FetchByte(State, &Value))
@ -1211,12 +1206,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeAddAl)
/* Make sure this is the right instruction */ /* Make sure this is the right instruction */
ASSERT(Opcode == 0x04); ASSERT(Opcode == 0x04);
if (State->PrefixFlags) NO_LOCK_PREFIX();
{
/* This opcode doesn't take any prefixes */
Fast486Exception(State, FAST486_EXCEPTION_UD);
return;
}
if (!Fast486FetchByte(State, &SecondValue)) if (!Fast486FetchByte(State, &SecondValue))
{ {
@ -1437,12 +1427,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeOrAl)
/* Make sure this is the right instruction */ /* Make sure this is the right instruction */
ASSERT(Opcode == 0x0C); ASSERT(Opcode == 0x0C);
if (State->PrefixFlags) NO_LOCK_PREFIX();
{
/* This opcode doesn't take any prefixes */
Fast486Exception(State, FAST486_EXCEPTION_UD);
return;
}
if (!Fast486FetchByte(State, &SecondValue)) if (!Fast486FetchByte(State, &SecondValue))
{ {
@ -1872,12 +1857,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeXorAl)
/* Make sure this is the right instruction */ /* Make sure this is the right instruction */
ASSERT(Opcode == 0x34); ASSERT(Opcode == 0x34);
if (State->PrefixFlags) NO_LOCK_PREFIX();
{
/* This opcode doesn't take any prefixes */
Fast486Exception(State, FAST486_EXCEPTION_UD);
return;
}
if (!Fast486FetchByte(State, &SecondValue)) if (!Fast486FetchByte(State, &SecondValue))
{ {
@ -2073,12 +2053,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeTestAl)
/* Make sure this is the right instruction */ /* Make sure this is the right instruction */
ASSERT(Opcode == 0xA8); ASSERT(Opcode == 0xA8);
if (State->PrefixFlags) NO_LOCK_PREFIX();
{
/* This opcode doesn't take any prefixes */
Fast486Exception(State, FAST486_EXCEPTION_UD);
return;
}
if (!Fast486FetchByte(State, &SecondValue)) if (!Fast486FetchByte(State, &SecondValue))
{ {
@ -2454,12 +2429,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeAdcAl)
/* Make sure this is the right instruction */ /* Make sure this is the right instruction */
ASSERT(Opcode == 0x14); ASSERT(Opcode == 0x14);
if (State->PrefixFlags) NO_LOCK_PREFIX();
{
/* This opcode doesn't take any prefixes */
Fast486Exception(State, FAST486_EXCEPTION_UD);
return;
}
if (!Fast486FetchByte(State, &SecondValue)) if (!Fast486FetchByte(State, &SecondValue))
{ {
@ -2746,12 +2716,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeSbbAl)
/* Make sure this is the right instruction */ /* Make sure this is the right instruction */
ASSERT(Opcode == 0x1C); ASSERT(Opcode == 0x1C);
if (State->PrefixFlags) NO_LOCK_PREFIX();
{
/* This opcode doesn't take any prefixes */
Fast486Exception(State, FAST486_EXCEPTION_UD);
return;
}
if (!Fast486FetchByte(State, &SecondValue)) if (!Fast486FetchByte(State, &SecondValue))
{ {
@ -3073,12 +3038,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeCmpSubAl)
/* Make sure this is the right instruction */ /* Make sure this is the right instruction */
ASSERT((Opcode & 0xEF) == 0x2C); ASSERT((Opcode & 0xEF) == 0x2C);
if (State->PrefixFlags) NO_LOCK_PREFIX();
{
/* This opcode doesn't take any prefixes */
Fast486Exception(State, FAST486_EXCEPTION_UD);
return;
}
if (!Fast486FetchByte(State, &SecondValue)) if (!Fast486FetchByte(State, &SecondValue))
{ {