[aandrejevic] 61067: [FAST486] In the string functions, use ADSIZE and not OPSIZE. In SCAS and CMPS, fix the "(1 << 32) - 1" bug.
22 Nov
2013
22 Nov
'13
12:46 a.m.
Author: aandrejevic
Date: Fri Nov 22 00:46:28 2013
New Revision: 61067
URL: http://svn.reactos.org/svn/reactos?rev=61067&view=rev
Log:
[FAST486]
In the string functions, use ADSIZE and not OPSIZE.
In SCAS and CMPS, fix the "(1 << 32) - 1" bug.
Modified:
branches/ntvdm/lib/fast486/opcodes.c
Modified: branches/ntvdm/lib/fast486/opcodes.c
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/lib/fast486/opcodes.c?rev…
==============================================================================
--- branches/ntvdm/lib/fast486/opcodes.c [iso-8859-1] (original)
+++ branches/ntvdm/lib/fast486/opcodes.c [iso-8859-1] Fri Nov 22 00:46:28 2013
@@ -5437,7 +5437,7 @@
if (State->PrefixFlags & FAST486_PREFIX_REP)
{
UCHAR Block[STRING_BLOCK_SIZE];
- ULONG Count = OperandSize ? State->GeneralRegs[FAST486_REG_ECX].Long
+ ULONG Count = AddressSize ? State->GeneralRegs[FAST486_REG_ECX].Long
: State->GeneralRegs[FAST486_REG_ECX].LowWord;
/* Clear the memory block */
@@ -5488,7 +5488,7 @@
Processed * DataSize))
{
/* Set ECX */
- if (OperandSize) State->GeneralRegs[FAST486_REG_ECX].Long = Count;
+ if (AddressSize) State->GeneralRegs[FAST486_REG_ECX].Long = Count;
else State->GeneralRegs[FAST486_REG_ECX].LowWord = LOWORD(Count);
/* Exception occurred */
@@ -5504,7 +5504,7 @@
Processed * DataSize))
{
/* Set ECX */
- if (OperandSize) State->GeneralRegs[FAST486_REG_ECX].Long = Count;
+ if (AddressSize) State->GeneralRegs[FAST486_REG_ECX].Long = Count;
else State->GeneralRegs[FAST486_REG_ECX].LowWord = LOWORD(Count);
/* Exception occurred */
@@ -5531,7 +5531,7 @@
}
/* Clear ECX */
- if (OperandSize) State->GeneralRegs[FAST486_REG_ECX].Long = 0;
+ if (AddressSize) State->GeneralRegs[FAST486_REG_ECX].Long = 0;
else State->GeneralRegs[FAST486_REG_ECX].LowWord = 0;
}
else
@@ -5562,7 +5562,7 @@
}
/* Increment/decrement ESI and EDI */
- if (OperandSize)
+ if (AddressSize)
{
if (!State->Flags.Df)
{
@@ -5620,8 +5620,8 @@
else DataSize = OperandSize ? sizeof(ULONG) : sizeof(USHORT);
/* Calculate the mask and sign flag */
- DataMask = (1 << (DataSize * 8)) - 1;
SignFlag = 1 << ((DataSize * 8) - 1);
+ DataMask = SignFlag | (SignFlag - 1);
/* Read from the first source operand */
if (!Fast486ReadMemory(State,
@@ -5664,7 +5664,7 @@
State->Flags.Pf = Fast486CalculateParity(Result);
/* Increment/decrement ESI and EDI */
- if (OperandSize)
+ if (AddressSize)
{
if (!State->Flags.Df)
{
@@ -5697,7 +5697,7 @@
{
BOOLEAN Repeat = TRUE;
- if (OperandSize)
+ if (AddressSize)
{
if ((--State->GeneralRegs[FAST486_REG_ECX].Long) == 0)
{
@@ -5752,7 +5752,7 @@
if (State->PrefixFlags & FAST486_PREFIX_REP)
{
UCHAR Block[STRING_BLOCK_SIZE];
- ULONG Count = OperandSize ? State->GeneralRegs[FAST486_REG_ECX].Long
+ ULONG Count = AddressSize ? State->GeneralRegs[FAST486_REG_ECX].Long
: State->GeneralRegs[FAST486_REG_ECX].LowWord;
/* Fill the memory block with the data */
@@ -5809,7 +5809,7 @@
Processed * DataSize))
{
/* Set ECX */
- if (OperandSize) State->GeneralRegs[FAST486_REG_ECX].Long = Count;
+ if (AddressSize) State->GeneralRegs[FAST486_REG_ECX].Long = Count;
else State->GeneralRegs[FAST486_REG_ECX].LowWord = LOWORD(Count);
/* Exception occurred */
@@ -5828,7 +5828,7 @@
}
/* Clear ECX */
- if (OperandSize) State->GeneralRegs[FAST486_REG_ECX].Long = 0;
+ if (AddressSize) State->GeneralRegs[FAST486_REG_ECX].Long = 0;
else State->GeneralRegs[FAST486_REG_ECX].LowWord = 0;
}
else
@@ -5846,7 +5846,7 @@
}
/* Increment/decrement EDI */
- if (OperandSize)
+ if (AddressSize)
{
if (!State->Flags.Df) State->GeneralRegs[FAST486_REG_EDI].Long +=
DataSize;
else State->GeneralRegs[FAST486_REG_EDI].Long -= DataSize;
@@ -5888,7 +5888,7 @@
if (State->PrefixFlags & FAST486_PREFIX_REP)
{
- ULONG Count = OperandSize ? State->GeneralRegs[FAST486_REG_ECX].Long
+ ULONG Count = AddressSize ? State->GeneralRegs[FAST486_REG_ECX].Long
: State->GeneralRegs[FAST486_REG_ECX].LowWord;
/* If the count is 0, do nothing */
@@ -5907,7 +5907,7 @@
}
/* Clear ECX */
- if (OperandSize) State->GeneralRegs[FAST486_REG_ECX].Long = 0;
+ if (AddressSize) State->GeneralRegs[FAST486_REG_ECX].Long = 0;
else State->GeneralRegs[FAST486_REG_ECX].LowWord = 0;
}
@@ -5925,7 +5925,7 @@
}
/* Increment/decrement ESI */
- if (OperandSize)
+ if (AddressSize)
{
if (!State->Flags.Df) State->GeneralRegs[FAST486_REG_ESI].Long +=
DataSize;
else State->GeneralRegs[FAST486_REG_ESI].Long -= DataSize;
@@ -5961,8 +5961,8 @@
else DataSize = OperandSize ? sizeof(ULONG) : sizeof(USHORT);
/* Calculate the mask and sign flag */
- DataMask = (1 << (DataSize * 8)) - 1;
SignFlag = 1 << ((DataSize * 8) - 1);
+ DataMask = SignFlag | (SignFlag - 1);
/* Read from the source operand */
if (!Fast486ReadMemory(State,
@@ -5992,7 +5992,7 @@
State->Flags.Pf = Fast486CalculateParity(Result);
/* Increment/decrement EDI */
- if (OperandSize)
+ if (AddressSize)
{
if (!State->Flags.Df) State->GeneralRegs[FAST486_REG_EDI].Long +=
DataSize;
else State->GeneralRegs[FAST486_REG_EDI].Long -= DataSize;
@@ -6009,7 +6009,7 @@
{
BOOLEAN Repeat = TRUE;
- if (OperandSize)
+ if (AddressSize)
{
if ((--State->GeneralRegs[FAST486_REG_ECX].Long) == 0)
{
@@ -6064,7 +6064,7 @@
if (State->PrefixFlags & FAST486_PREFIX_REP)
{
UCHAR Block[STRING_BLOCK_SIZE];
- ULONG Count = OperandSize ? State->GeneralRegs[FAST486_REG_ECX].Long
+ ULONG Count = AddressSize ? State->GeneralRegs[FAST486_REG_ECX].Long
: State->GeneralRegs[FAST486_REG_ECX].LowWord;
/* Clear the memory block */
@@ -6123,7 +6123,7 @@
Processed * DataSize))
{
/* Set ECX */
- if (OperandSize) State->GeneralRegs[FAST486_REG_ECX].Long = Count;
+ if (AddressSize) State->GeneralRegs[FAST486_REG_ECX].Long = Count;
else State->GeneralRegs[FAST486_REG_ECX].LowWord = LOWORD(Count);
/* Exception occurred */
@@ -6142,7 +6142,7 @@
}
/* Clear ECX */
- if (OperandSize) State->GeneralRegs[FAST486_REG_ECX].Long = 0;
+ if (AddressSize) State->GeneralRegs[FAST486_REG_ECX].Long = 0;
else State->GeneralRegs[FAST486_REG_ECX].LowWord = 0;
}
else
@@ -6169,7 +6169,7 @@
}
/* Increment/decrement EDI */
- if (OperandSize)
+ if (AddressSize)
{
if (!State->Flags.Df) State->GeneralRegs[FAST486_REG_EDI].Long +=
DataSize;
else State->GeneralRegs[FAST486_REG_EDI].Long -= DataSize;
@@ -6205,7 +6205,7 @@
if (State->PrefixFlags & FAST486_PREFIX_REP)
{
UCHAR Block[STRING_BLOCK_SIZE];
- ULONG Count = OperandSize ? State->GeneralRegs[FAST486_REG_ECX].Long
+ ULONG Count = AddressSize ? State->GeneralRegs[FAST486_REG_ECX].Long
: State->GeneralRegs[FAST486_REG_ECX].LowWord;
/* Clear the memory block */
@@ -6237,7 +6237,7 @@
Processed * DataSize))
{
/* Set ECX */
- if (OperandSize) State->GeneralRegs[FAST486_REG_ECX].Long = Count;
+ if (AddressSize) State->GeneralRegs[FAST486_REG_ECX].Long = Count;
else State->GeneralRegs[FAST486_REG_ECX].LowWord = LOWORD(Count);
/* Exception occurred */
@@ -6284,7 +6284,7 @@
}
/* Clear ECX */
- if (OperandSize) State->GeneralRegs[FAST486_REG_ECX].Long = 0;
+ if (AddressSize) State->GeneralRegs[FAST486_REG_ECX].Long = 0;
else State->GeneralRegs[FAST486_REG_ECX].LowWord = 0;
}
else
@@ -6312,7 +6312,7 @@
DataSize);
/* Increment/decrement ESI */
- if (OperandSize)
+ if (AddressSize)
{
if (!State->Flags.Df) State->GeneralRegs[FAST486_REG_ESI].Long +=
DataSize;
else State->GeneralRegs[FAST486_REG_ESI].Long -= DataSize;
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