[aandrejevic] 62344: [FAST486] All of the FPU opcodes fetch another byte which is the function number. This is done by the CPU and it occurs even if there is no FPU attached.

Author: aandrejevic
Date: Thu Feb 27 03:54:43 2014
New Revision: 62344

URL: http://svn.reactos.org/svn/reactos?rev=62344&view=rev
Log:
[FAST486]
All of the FPU opcodes fetch another byte which is the function number.
This is done by the CPU and it occurs even if there is no FPU attached.


Modified:
    branches/ntvdm/lib/fast486/fpu.c

Modified: branches/ntvdm/lib/fast486/fpu.c
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/lib/fast486/fpu.c?rev=623…
==============================================================================
--- branches/ntvdm/lib/fast486/fpu.c	[iso-8859-1] (original)
+++ branches/ntvdm/lib/fast486/fpu.c	[iso-8859-1] Thu Feb 27 03:54:43 2014
@@ -35,7 +35,16 @@
 
 FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD8)
 {
-    FPU_CHECK();
+    UCHAR Function;
+
+    FPU_CHECK();
+
+    /* Fetch the function number */
+    if (!Fast486FetchByte(State, &Function))
+    {
+        /* Exception occurred */
+        return FALSE;
+    }
 
 #ifndef FAST486_NO_FPU
     // TODO: NOT IMPLEMENTED
@@ -50,7 +59,16 @@
 
 FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD9)
 {
-    FPU_CHECK();
+    UCHAR Function;
+
+    FPU_CHECK();
+
+    /* Fetch the function number */
+    if (!Fast486FetchByte(State, &Function))
+    {
+        /* Exception occurred */
+        return FALSE;
+    }
 
 #ifndef FAST486_NO_FPU
     // TODO: NOT IMPLEMENTED
@@ -65,7 +83,16 @@
 
 FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDA)
 {
-    FPU_CHECK();
+    UCHAR Function;
+
+    FPU_CHECK();
+
+    /* Fetch the function number */
+    if (!Fast486FetchByte(State, &Function))
+    {
+        /* Exception occurred */
+        return FALSE;
+    }
 
 #ifndef FAST486_NO_FPU
     // TODO: NOT IMPLEMENTED
@@ -80,7 +107,16 @@
 
 FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDB)
 {
-    FPU_CHECK();
+    UCHAR Function;
+
+    FPU_CHECK();
+
+    /* Fetch the function number */
+    if (!Fast486FetchByte(State, &Function))
+    {
+        /* Exception occurred */
+        return FALSE;
+    }
 
 #ifndef FAST486_NO_FPU
     // TODO: NOT IMPLEMENTED
@@ -95,7 +131,16 @@
 
 FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDC)
 {
-    FPU_CHECK();
+    UCHAR Function;
+
+    FPU_CHECK();
+
+    /* Fetch the function number */
+    if (!Fast486FetchByte(State, &Function))
+    {
+        /* Exception occurred */
+        return FALSE;
+    }
 
 #ifndef FAST486_NO_FPU
     // TODO: NOT IMPLEMENTED
@@ -110,7 +155,16 @@
 
 FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDD)
 {
-    FPU_CHECK();
+    UCHAR Function;
+
+    FPU_CHECK();
+
+    /* Fetch the function number */
+    if (!Fast486FetchByte(State, &Function))
+    {
+        /* Exception occurred */
+        return FALSE;
+    }
 
 #ifndef FAST486_NO_FPU
     // TODO: NOT IMPLEMENTED
@@ -125,7 +179,16 @@
 
 FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDE)
 {
-    FPU_CHECK();
+    UCHAR Function;
+
+    FPU_CHECK();
+
+    /* Fetch the function number */
+    if (!Fast486FetchByte(State, &Function))
+    {
+        /* Exception occurred */
+        return FALSE;
+    }
 
 #ifndef FAST486_NO_FPU
     // TODO: NOT IMPLEMENTED
@@ -140,7 +203,16 @@
 
 FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDF)
 {
-    FPU_CHECK();
+    UCHAR Function;
+
+    FPU_CHECK();
+
+    /* Fetch the function number */
+    if (!Fast486FetchByte(State, &Function))
+    {
+        /* Exception occurred */
+        return FALSE;
+    }
 
 #ifndef FAST486_NO_FPU
     // TODO: NOT IMPLEMENTED