[ros-diffs] [aandrejevic] 60144: [SOFT386] Implement LAHF, SAHF, LEA and PUSH imm16/32

Author: aandrejevic
Date: Sun Sep 15 18:02:41 2013
New Revision: 60144

URL: http://svn.reactos.org/svn/reactos?rev=60144&view=rev
Log:
[SOFT386]
Implement LAHF, SAHF, LEA and PUSH imm16/32

Modified:
    branches/ntvdm/lib/soft386/opcodes.c

Modified: branches/ntvdm/lib/soft386/opcodes.c
URL: http://svn.reactos.org/svn/reactos/branches/ntvdm/lib/soft386/opcodes.c?rev=...
==============================================================================
--- branches/ntvdm/lib/soft386/opcodes.c	[iso-8859-1] (original)
+++ branches/ntvdm/lib/soft386/opcodes.c	[iso-8859-1] Sun Sep 15 18:02:41 2013
@@ -3627,23 +3627,65 @@

SOFT386_OPCODE_HANDLER(Soft386OpcodePushImm)
 {
+    BOOLEAN Size = State->SegmentRegs[SOFT386_REG_CS].Size;
+
+    /* 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)
+{
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;

return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeImulModrmImm)
-{
-    // TODO: NOT IMPLEMENTED
-    UNIMPLEMENTED;
-
-    return FALSE;
-}
-
 SOFT386_OPCODE_HANDLER(Soft386OpcodePushByteImm)
 {
     UCHAR Data;
+
+    /* Make sure this is the right instruction */
+    ASSERT(Opcode == 0x6A);

if (!Soft386FetchByte(State, &Data))
     {
@@ -3811,10 +3853,57 @@

SOFT386_OPCODE_HANDLER(Soft386OpcodeLea)
 {
-    // TODO: NOT IMPLEMENTED
-    UNIMPLEMENTED;
-
-    return FALSE;
+    SOFT386_MOD_REG_RM ModRegRm;
+    BOOLEAN OperandSize, AddressSize;
+
+    /* 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)
@@ -3936,13 +4025,40 @@

SOFT386_OPCODE_HANDLER(Soft386OpcodeSahf)
 {
+    /* 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)
+{
+    /* 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;
+}
+
+SOFT386_OPCODE_HANDLER(Soft386OpcodeRetImm)
+{
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;

return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeLahf)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeRet)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -3950,7 +4066,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeRetImm)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeLes)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -3958,7 +4074,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeRet)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeLds)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -3966,7 +4082,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeLes)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeEnter)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -3974,7 +4090,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeLds)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeLeave)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -3982,7 +4098,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeEnter)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeRetFarImm)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -3990,7 +4106,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeLeave)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeRetFar)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -3998,7 +4114,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeRetFarImm)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeInt3)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -4006,7 +4122,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeRetFar)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeInt)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -4014,7 +4130,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeInt3)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeIntOverflow)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -4022,7 +4138,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeInt)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeIret)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -4030,7 +4146,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeIntOverflow)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeAam)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -4038,7 +4154,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeIret)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeAad)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -4046,7 +4162,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeAam)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeXlat)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -4054,7 +4170,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeAad)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeLoopnz)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -4062,7 +4178,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeXlat)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeLoopz)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -4070,7 +4186,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeLoopnz)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeLoop)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -4078,7 +4194,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeLoopz)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeJecxz)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -4086,7 +4202,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeLoop)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeCall)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -4094,7 +4210,7 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeJecxz)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeJmp)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;
@@ -4102,26 +4218,10 @@
     return FALSE;
 }

-SOFT386_OPCODE_HANDLER(Soft386OpcodeCall)
+SOFT386_OPCODE_HANDLER(Soft386OpcodeJmpAbs)
 {
     // TODO: NOT IMPLEMENTED
     UNIMPLEMENTED;

return FALSE;
 }
-
-SOFT386_OPCODE_HANDLER(Soft386OpcodeJmp)
-{
-    // TODO: NOT IMPLEMENTED
-    UNIMPLEMENTED;
-
-    return FALSE;
-}
-
-SOFT386_OPCODE_HANDLER(Soft386OpcodeJmpAbs)
-{
-    // TODO: NOT IMPLEMENTED
-    UNIMPLEMENTED;
-
-    return FALSE;
-}