[ros-diffs] [blight] 18286: Change indentation - make it a bit more readable and same style everywhere.

Change indentation - make it a bit more readable and same style
everywhere.
KiCheckFPU: Change calculation of DummyArea/FxSaveArea (avoid
conditional)
KeSaveFloatingPointState: Allocate NonPagedPool for the saved state
because function can be called only at IRQL >= DISPATCH
Modified: trunk/reactos/ntoskrnl/ke/i386/fpu.c
  _____

Modified: trunk/reactos/ntoskrnl/ke/i386/fpu.c
--- trunk/reactos/ntoskrnl/ke/i386/fpu.c	2005-10-05 23:24:25 UTC
(rev 18285)
+++ trunk/reactos/ntoskrnl/ke/i386/fpu.c	2005-10-05 23:30:39 UTC
(rev 18286)
@@ -48,235 +48,227 @@

STATIC USHORT
 KiTagWordFnsaveToFxsave(USHORT TagWord)
 {
-  INT tmp;
+    INT tmp;

-  /*
-   * Converts the tag-word. 11 (Empty) is converted into 0, everything
else into 1
-   */
-  tmp = ~TagWord; /* Empty is now 00, any 2 bits containing 1 mean
valid */
-  tmp = (tmp | (tmp >> 1)) & 0x5555; /* 0V0V0V0V0V0V0V0V */
-  tmp = (tmp | (tmp >> 1)) & 0x3333; /* 00VV00VV00VV00VV */
-  tmp = (tmp | (tmp >> 2)) & 0x0f0f; /* 0000VVVV0000VVVV */
-  tmp = (tmp | (tmp >> 4)) & 0x00ff; /* 00000000VVVVVVVV */
+    /*
+     * Converts the tag-word. 11 (Empty) is converted into 0,
everything else into 1
+     */
+    tmp = ~TagWord; /* Empty is now 00, any 2 bits containing 1 mean
valid */
+    tmp = (tmp | (tmp >> 1)) & 0x5555; /* 0V0V0V0V0V0V0V0V */
+    tmp = (tmp | (tmp >> 1)) & 0x3333; /* 00VV00VV00VV00VV */
+    tmp = (tmp | (tmp >> 2)) & 0x0f0f; /* 0000VVVV0000VVVV */
+    tmp = (tmp | (tmp >> 4)) & 0x00ff; /* 00000000VVVVVVVV */

-  return tmp;
+    return tmp;
 }

STATIC USHORT
 KiTagWordFxsaveToFnsave(PFXSAVE_FORMAT FxSave)
 {
-  USHORT TagWord = 0;
-  UCHAR Tag;
-  INT i;
-  struct FPREG { USHORT Significand[4]; USHORT Exponent; } *FpReg;
+    USHORT TagWord = 0;
+    UCHAR Tag;
+    INT i;
+    struct FPREG { USHORT Significand[4]; USHORT Exponent; } *FpReg;

-  for (i = 0; i < 8; i++)
+    for (i = 0; i < 8; i++)
     {
-      if (FxSave->TagWord & (1 << i)) /* valid */
+        if (FxSave->TagWord & (1 << i)) /* valid */
         {
-          FpReg = (struct FPREG *)(FxSave->RegisterArea + (i * 16));
-          switch (FpReg->Exponent & 0x00007fff)
+            FpReg = (struct FPREG *)(FxSave->RegisterArea + (i * 16));
+            switch (FpReg->Exponent & 0x00007fff)
             {
-              case 0x0000:
+            case 0x0000:
                 if (FpReg->Significand[0] == 0 && FpReg->Significand[1]
== 0 &&
                     FpReg->Significand[2] == 0 && FpReg->Significand[3]
== 0)
-                  {
                     Tag = 1;  /* Zero */
-                  }
                 else
-                  {
                     Tag = 2;  /* Special */
-                  }
                 break;

-              case 0x7fff:
+            case 0x7fff:
                 Tag = 2;      /* Special */
                 break;

-              default:
+            default:
                 if (FpReg->Significand[3] & 0x00008000)
-                  {
                     Tag = 0;  /* Valid */
-                  }
                 else
-                  {
                     Tag = 2;  /* Special */
-                  }
                 break;
             }
         }
-      else /* empty */
+        else /* empty */
         {
-          Tag = 3;
+           Tag = 3;
         }
-      TagWord |= Tag << (i * 2);
+        TagWord |= Tag << (i * 2);
     }

-  return TagWord;
+    return TagWord;
 }

STATIC VOID
 KiFnsaveToFxsaveFormat(PFXSAVE_FORMAT FxSave, CONST PFNSAVE_FORMAT
FnSave)
 {
-  INT i;
+    INT i;

-  FxSave->ControlWord = (USHORT)FnSave->ControlWord;
-  FxSave->StatusWord = (USHORT)FnSave->StatusWord;
-  FxSave->TagWord = KiTagWordFnsaveToFxsave((USHORT)FnSave->TagWord);
-  FxSave->ErrorOpcode = (USHORT)(FnSave->ErrorSelector >> 16);
-  FxSave->ErrorOffset = FnSave->ErrorOffset;
-  FxSave->ErrorSelector = FnSave->ErrorSelector & 0x0000ffff;
-  FxSave->DataOffset = FnSave->DataOffset;
-  FxSave->DataSelector = FnSave->DataSelector & 0x0000ffff;
-  if (XmmSupport)
-    FxSave->MXCsr = 0x00001f80 & MxcsrFeatureMask;
-  else
-    FxSave->MXCsr = 0;
-  FxSave->MXCsrMask = MxcsrFeatureMask;
-  memset(FxSave->Reserved3, 0, sizeof(FxSave->Reserved3) +
-         sizeof(FxSave->Reserved4)); /* XXX - doesnt zero Align16Byte
because
-                                        Context->ExtendedRegisters is
only 512 bytes, not 520 */
-  for (i = 0; i < 8; i++)
+    FxSave->ControlWord = (USHORT)FnSave->ControlWord;
+    FxSave->StatusWord = (USHORT)FnSave->StatusWord;
+    FxSave->TagWord = KiTagWordFnsaveToFxsave((USHORT)FnSave->TagWord);
+    FxSave->ErrorOpcode = (USHORT)(FnSave->ErrorSelector >> 16);
+    FxSave->ErrorOffset = FnSave->ErrorOffset;
+    FxSave->ErrorSelector = FnSave->ErrorSelector & 0x0000ffff;
+    FxSave->DataOffset = FnSave->DataOffset;
+    FxSave->DataSelector = FnSave->DataSelector & 0x0000ffff;
+    if (XmmSupport)
+        FxSave->MXCsr = 0x00001f80 & MxcsrFeatureMask;
+    else
+        FxSave->MXCsr = 0;
+    FxSave->MXCsrMask = MxcsrFeatureMask;
+    memset(FxSave->Reserved3, 0, sizeof(FxSave->Reserved3) +
+           sizeof(FxSave->Reserved4)); /* Don't zero Align16Byte
because Context->ExtendedRegisters
+                                          is only 512 bytes, not 520 */
+    for (i = 0; i < 8; i++)
     {
-      memcpy(FxSave->RegisterArea + (i * 16), FnSave->RegisterArea + (i
* 10), 10);
-      memset(FxSave->RegisterArea + (i * 16) + 10, 0, 6);
+        memcpy(FxSave->RegisterArea + (i * 16), FnSave->RegisterArea +
(i * 10), 10);
+        memset(FxSave->RegisterArea + (i * 16) + 10, 0, 6);
     }
 }

STATIC VOID
 KiFxsaveToFnsaveFormat(PFNSAVE_FORMAT FnSave, CONST PFXSAVE_FORMAT
FxSave)
 {
-  INT i;
+    INT i;

-  FnSave->ControlWord = 0xffff0000 | FxSave->ControlWord;
-  FnSave->StatusWord = 0xffff0000 | FxSave->StatusWord;
-  FnSave->TagWord = 0xffff0000 | KiTagWordFxsaveToFnsave(FxSave);
-  FnSave->ErrorOffset = FxSave->ErrorOffset;
-  FnSave->ErrorSelector = FxSave->ErrorSelector & 0x0000ffff;
-  FnSave->ErrorSelector |= FxSave->ErrorOpcode << 16;
-  FnSave->DataOffset = FxSave->DataOffset;
-  FnSave->DataSelector = FxSave->DataSelector | 0xffff0000;
-  for (i = 0; i < 8; i++)
+    FnSave->ControlWord = 0xffff0000 | FxSave->ControlWord;
+    FnSave->StatusWord = 0xffff0000 | FxSave->StatusWord;
+    FnSave->TagWord = 0xffff0000 | KiTagWordFxsaveToFnsave(FxSave);
+    FnSave->ErrorOffset = FxSave->ErrorOffset;
+    FnSave->ErrorSelector = FxSave->ErrorSelector & 0x0000ffff;
+    FnSave->ErrorSelector |= FxSave->ErrorOpcode << 16;
+    FnSave->DataOffset = FxSave->DataOffset;
+    FnSave->DataSelector = FxSave->DataSelector | 0xffff0000;
+    for (i = 0; i < 8; i++)
     {
-      memcpy(FnSave->RegisterArea + (i * 10), FxSave->RegisterArea + (i
* 16), 10);
+        memcpy(FnSave->RegisterArea + (i * 10), FxSave->RegisterArea +
(i * 16), 10);
     }
 }

VOID
 KiFloatingSaveAreaToFxSaveArea(PFX_SAVE_AREA FxSaveArea, CONST
FLOATING_SAVE_AREA *FloatingSaveArea)
 {
-  if (FxsrSupport)
-  {
-    KiFnsaveToFxsaveFormat(&FxSaveArea->U.FxArea,
(PFNSAVE_FORMAT)FloatingSaveArea);
-  }
-  else
-  {
-    memcpy(&FxSaveArea->U.FnArea, FloatingSaveArea,
sizeof(FxSaveArea->U.FnArea));
-  }
-  FxSaveArea->NpxSavedCpu = 0;
-  FxSaveArea->Cr0NpxState = FloatingSaveArea->Cr0NpxState;
+    if (FxsrSupport)
+    {
+        KiFnsaveToFxsaveFormat(&FxSaveArea->U.FxArea,
(PFNSAVE_FORMAT)FloatingSaveArea);
+    }
+    else
+    {
+        memcpy(&FxSaveArea->U.FnArea, FloatingSaveArea,
sizeof(FxSaveArea->U.FnArea));
+    }
+    FxSaveArea->NpxSavedCpu = 0;
+    FxSaveArea->Cr0NpxState = FloatingSaveArea->Cr0NpxState;
 }

BOOL
 KiContextToFxSaveArea(PFX_SAVE_AREA FxSaveArea, PCONTEXT Context)
 {
-  BOOL FpuContextChanged = FALSE;
+    BOOL FpuContextChanged = FALSE;

-  /* First of all convert the FLOATING_SAVE_AREA into the FX_SAVE_AREA
*/
-  if ((Context->ContextFlags & CONTEXT_FLOATING_POINT) ==
CONTEXT_FLOATING_POINT)
+    /* First of all convert the FLOATING_SAVE_AREA into the
FX_SAVE_AREA */
+    if ((Context->ContextFlags & CONTEXT_FLOATING_POINT) ==
CONTEXT_FLOATING_POINT)
     {
-      KiFloatingSaveAreaToFxSaveArea(FxSaveArea, &Context->FloatSave);
-      FpuContextChanged = TRUE;
+        KiFloatingSaveAreaToFxSaveArea(FxSaveArea,
&Context->FloatSave);
+        FpuContextChanged = TRUE;
     }

-  /* Now merge the FX_SAVE_AREA from the context with the destination
area */
-  if ((Context->ContextFlags & CONTEXT_EXTENDED_REGISTERS) ==
CONTEXT_EXTENDED_REGISTERS)
+    /* Now merge the FX_SAVE_AREA from the context with the destination
area */
+    if ((Context->ContextFlags & CONTEXT_EXTENDED_REGISTERS) ==
CONTEXT_EXTENDED_REGISTERS)
     {
-      if (FxsrSupport)
+        if (FxsrSupport)
         {
-          PFXSAVE_FORMAT src =
(PFXSAVE_FORMAT)Context->ExtendedRegisters;
-          PFXSAVE_FORMAT dst = &FxSaveArea->U.FxArea;
-          dst->MXCsr = src->MXCsr & MxcsrFeatureMask;
-          memcpy(dst->Reserved3, src->Reserved3,
-                 sizeof(src->Reserved3) + sizeof(src->Reserved4));
+            PFXSAVE_FORMAT src =
(PFXSAVE_FORMAT)Context->ExtendedRegisters;
+            PFXSAVE_FORMAT dst = &FxSaveArea->U.FxArea;
+            dst->MXCsr = src->MXCsr & MxcsrFeatureMask;
+            memcpy(dst->Reserved3, src->Reserved3,
+                   sizeof(src->Reserved3) + sizeof(src->Reserved4));

-          if ((Context->ContextFlags & CONTEXT_FLOATING_POINT) !=
CONTEXT_FLOATING_POINT)
+            if ((Context->ContextFlags & CONTEXT_FLOATING_POINT) !=
CONTEXT_FLOATING_POINT)
             {
-              dst->ControlWord = src->ControlWord;
-              dst->StatusWord = src->StatusWord;
-              dst->TagWord = src->TagWord;
-              dst->ErrorOpcode = src->ErrorOpcode;
-              dst->ErrorOffset = src->ErrorOffset;
-              dst->ErrorSelector = src->ErrorSelector;
-              dst->DataOffset = src->DataOffset;
-              dst->DataSelector = src->DataSelector;
-              memcpy(dst->RegisterArea, src->RegisterArea,
sizeof(src->RegisterArea));
+                dst->ControlWord = src->ControlWord;
+                dst->StatusWord = src->StatusWord;
+                dst->TagWord = src->TagWord;
+                dst->ErrorOpcode = src->ErrorOpcode;
+                dst->ErrorOffset = src->ErrorOffset;
+                dst->ErrorSelector = src->ErrorSelector;
+                dst->DataOffset = src->DataOffset;
+                dst->DataSelector = src->DataSelector;
+                memcpy(dst->RegisterArea, src->RegisterArea,
sizeof(src->RegisterArea));

-              FxSaveArea->NpxSavedCpu = 0;
-              FxSaveArea->Cr0NpxState = 0;
+                FxSaveArea->NpxSavedCpu = 0;
+                FxSaveArea->Cr0NpxState = 0;
             }
-          FpuContextChanged = TRUE;
+            FpuContextChanged = TRUE;
         }
     }

-  return FpuContextChanged;
+    return FpuContextChanged;
 }

VOID INIT_FUNCTION
 KiCheckFPU(VOID)
 {
-   unsigned short int status;
-   int cr0;
-   ULONG Flags;
-   PKPRCB Prcb = KeGetCurrentPrcb();
+    unsigned short int status;
+    int cr0;
+    ULONG Flags;
+    PKPRCB Prcb = KeGetCurrentPrcb();

-   Ke386SaveFlags(Flags);
-   Ke386DisableInterrupts();
+    Ke386SaveFlags(Flags);
+    Ke386DisableInterrupts();

-   HardwareMathSupport = 0;
-   FxsrSupport = 0;
-   XmmSupport = 0;
+    HardwareMathSupport = 0;
+    FxsrSupport = 0;
+    XmmSupport = 0;

-   cr0 = Ke386GetCr0();
-   cr0 |= X86_CR0_NE | X86_CR0_MP;
-   cr0 &= ~(X86_CR0_EM | X86_CR0_TS);
-   Ke386SetCr0(cr0);
+    cr0 = Ke386GetCr0();
+    cr0 |= X86_CR0_NE | X86_CR0_MP;
+    cr0 &= ~(X86_CR0_EM | X86_CR0_TS);
+    Ke386SetCr0(cr0);

#if defined(__GNUC__)
-   asm volatile("fninit\n\t");
-   asm volatile("fstsw %0\n\t" : "=a" (status));
+    asm volatile("fninit\n\t");
+    asm volatile("fstsw %0\n\t" : "=a" (status));
 #elif defined(_MSC_VER)
-   __asm
-   {
+    __asm
+    {
       fninit;
       fstsw status
-   }
+    }
 #else
 #error Unknown compiler for inline assembler
 #endif

-   if (status != 0)
-     {
-	/* Set the EM flag in CR0 so any FPU instructions cause a trap.
*/
-	Ke386SetCr0(Ke386GetCr0() | X86_CR0_EM);
+    if (status != 0)
+    {
+        /* Set the EM flag in CR0 so any FPU instructions cause a trap.
*/
+        Ke386SetCr0(Ke386GetCr0() | X86_CR0_EM);
         Ke386RestoreFlags(Flags);
-	return;
-     }
+        return;
+    }

-   /* fsetpm for i287, ignored by i387 */
+    /* fsetpm for i287, ignored by i387 */
 #if defined(__GNUC__)
-   asm volatile(".byte 0xDB, 0xE4\n\t");
+    asm volatile(".byte 0xDB, 0xE4\n\t");
 #elif defined(_MSC_VER)
-   __asm _emit 0xDB __asm _emit 0xe4
+    __asm _emit 0xDB __asm _emit 0xe4
 #else
 #error Unknown compiler for inline assembler
 #endif

-   HardwareMathSupport = 1;
+    HardwareMathSupport = 1;

-   /* check for and enable MMX/SSE support if possible */
-   if ((Prcb->FeatureBits & X86_FEATURE_FXSR) != 0)
-     {
+    /* check for and enable MMX/SSE support if possible */
+    if ((Prcb->FeatureBits & X86_FEATURE_FXSR) != 0)
+    {
         BYTE DummyArea[sizeof(FX_SAVE_AREA) + 15];
         PFX_SAVE_AREA FxSaveArea;

@@ -284,32 +276,28 @@
         FxsrSupport = 1;

/* we need a 16 byte aligned FX_SAVE_AREA */
-        FxSaveArea = (PFX_SAVE_AREA)DummyArea;
-        if ((ULONG_PTR)FxSaveArea & 0x0f)
-          {
-            FxSaveArea = (PFX_SAVE_AREA)(((ULONG_PTR)FxSaveArea + 0x10)
& (~0x0f));
-          }
+        FxSaveArea = (PFX_SAVE_AREA)(((ULONG_PTR)DummyArea + 0xf) &
(~0x0f));

Ke386SetCr4(Ke386GetCr4() | X86_CR4_OSFXSR);
         memset(&FxSaveArea->U.FxArea, 0, sizeof(FxSaveArea->U.FxArea));
         asm volatile("fxsave %0" : : "m"(FxSaveArea->U.FxArea));
         MxcsrFeatureMask = FxSaveArea->U.FxArea.MXCsrMask;
         if (MxcsrFeatureMask == 0)
-          {
-             MxcsrFeatureMask = 0x0000ffbf;
-          }
-     }
-   /* FIXME: Check for SSE3 in Ke386CpuidFlags2! */
-   if (Prcb->FeatureBits & (X86_FEATURE_SSE | X86_FEATURE_SSE2))
-     {
+        {
+            MxcsrFeatureMask = 0x0000ffbf;
+        }
+    }
+    /* FIXME: Check for SSE3 in Ke386CpuidFlags2! */
+    if (Prcb->FeatureBits & (X86_FEATURE_SSE | X86_FEATURE_SSE2))
+    {
         Ke386SetCr4(Ke386GetCr4() | X86_CR4_OSXMMEXCPT);

/* enable SSE */
         XmmSupport = 1;
-     }
+    }

-   Ke386SetCr0(Ke386GetCr0() | X86_CR0_TS);
-   Ke386RestoreFlags(Flags);
+    Ke386SetCr0(Ke386GetCr0() | X86_CR0_TS);
+    Ke386RestoreFlags(Flags);
 }

/* This is a rather naive implementation of
Ke(Save/Restore)FloatingPointState
@@ -320,261 +308,260 @@
 NTSTATUS STDCALL
 KeSaveFloatingPointState(OUT PKFLOATING_SAVE Save)
 {
-  char *FpState;
+    char *FpState;

-  ASSERT_IRQL(DISPATCH_LEVEL); /* FIXME: is this removed for non-debug
builds? I hope not! */
+    ASSERT_IRQL(DISPATCH_LEVEL);

-  /* check if we are doing software emulation */
-  if (!HardwareMathSupport)
+    /* check if we are doing software emulation */
+    if (!HardwareMathSupport)
     {
-      return STATUS_ILLEGAL_FLOAT_CONTEXT;
+        return STATUS_ILLEGAL_FLOAT_CONTEXT;
     }

-  FpState = ExAllocatePool(PagedPool, FPU_STATE_SIZE);
-  if (NULL == FpState)
+    FpState = ExAllocatePool(NonPagedPool, FPU_STATE_SIZE);
+    if (NULL == FpState)
     {
-      return STATUS_INSUFFICIENT_RESOURCES;
+        return STATUS_INSUFFICIENT_RESOURCES;
     }
-  *((PVOID *) Save) = FpState;
+    *((PVOID *) Save) = FpState;

#if defined(__GNUC__)
-  asm volatile("fsave %0\n\t" : "=m" (*FpState));
+    asm volatile("fsave %0\n\t" : "=m" (*FpState));
 #elif defined(_MSC_VER)
-  __asm mov eax, FpState;
-  __asm fsave [eax];
+    __asm mov eax, FpState;
+    __asm fsave [eax];
 #else
 #error Unknown compiler for inline assembler
 #endif

-  KeGetCurrentThread()->NpxIrql = KeGetCurrentIrql();
+    KeGetCurrentThread()->NpxIrql = KeGetCurrentIrql();

-  return STATUS_SUCCESS;
+    return STATUS_SUCCESS;
 }

NTSTATUS STDCALL
 KeRestoreFloatingPointState(IN PKFLOATING_SAVE Save)
 {
-  char *FpState = *((PVOID *) Save);
+    char *FpState = *((PVOID *) Save);

-  if (KeGetCurrentThread()->NpxIrql != KeGetCurrentIrql())
+    if (KeGetCurrentThread()->NpxIrql != KeGetCurrentIrql())
     {
-      KEBUGCHECK(UNDEFINED_BUG_CODE);
+        KEBUGCHECK(UNDEFINED_BUG_CODE);
     }

#if defined(__GNUC__)
-  __asm__("frstor %0\n\t" : "=m" (*FpState));
+    __asm__("frstor %0\n\t" : "=m" (*FpState));
 #elif defined(_MSC_VER)
-  __asm mov eax, FpState;
-  __asm frstor [eax];
+    __asm mov eax, FpState;
+    __asm frstor [eax];
 #else
 #error Unknown compiler for inline assembler
 #endif

-  ExFreePool(FpState);
+    ExFreePool(FpState);

-  return STATUS_SUCCESS;
+    return STATUS_SUCCESS;
 }

NTSTATUS
 KiHandleFpuFault(PKTRAP_FRAME Tf, ULONG ExceptionNr)
 {
-  if (ExceptionNr == 7) /* device not present */
+    if (ExceptionNr == 7) /* device not present */
     {
-      BOOL FpuInitialized = FALSE;
-      unsigned int cr0 = Ke386GetCr0();
-      PKTHREAD CurrentThread;
-      PFX_SAVE_AREA FxSaveArea;
-      KIRQL oldIrql;
+        BOOL FpuInitialized = FALSE;
+        unsigned int cr0 = Ke386GetCr0();
+        PKTHREAD CurrentThread;
+        PFX_SAVE_AREA FxSaveArea;
+        KIRQL oldIrql;
 #ifndef CONFIG_SMP
-      PKTHREAD NpxThread;
+        PKTHREAD NpxThread;
 #endif

-      (void) cr0;
-      ASSERT((cr0 & X86_CR0_TS) == X86_CR0_TS);
-      ASSERT((Tf->Eflags & X86_EFLAGS_VM) == 0);
-      ASSERT((cr0 & X86_CR0_EM) == 0);
+        (void) cr0;
+        ASSERT((cr0 & X86_CR0_TS) == X86_CR0_TS);
+        ASSERT((Tf->Eflags & X86_EFLAGS_VM) == 0);
+        ASSERT((cr0 & X86_CR0_EM) == 0);

-      /* disable scheduler, clear TS in cr0 */
-      ASSERT_IRQL(DISPATCH_LEVEL);
-      KeRaiseIrql(DISPATCH_LEVEL, &oldIrql);
-      asm volatile("clts");
+        /* disable scheduler, clear TS in cr0 */
+        ASSERT_IRQL(DISPATCH_LEVEL);
+        KeRaiseIrql(DISPATCH_LEVEL, &oldIrql);
+        asm volatile("clts");

-      CurrentThread = KeGetCurrentThread();
+        CurrentThread = KeGetCurrentThread();
 #ifndef CONFIG_SMP
-      NpxThread = KeGetCurrentPrcb()->NpxThread;
+        NpxThread = KeGetCurrentPrcb()->NpxThread;
 #endif

-      ASSERT(CurrentThread != NULL);
-      DPRINT("Device not present exception happened! (Cr0 = 0x%x,
NpxState = 0x%x)\n", cr0, CurrentThread->NpxState);
+        ASSERT(CurrentThread != NULL);
+        DPRINT("Device not present exception happened! (Cr0 = 0x%x,
NpxState = 0x%x)\n", cr0, CurrentThread->NpxState);

#ifndef CONFIG_SMP
-      /* check if the current thread already owns the FPU */
-      if (NpxThread != CurrentThread) /* FIXME: maybe this could be an
assertation */
+        /* check if the current thread already owns the FPU */
+        if (NpxThread != CurrentThread) /* FIXME: maybe this could be
an assertation */
         {
-          /* save the FPU state into the owner's save area */
-          if (NpxThread != NULL)
+            /* save the FPU state into the owner's save area */
+            if (NpxThread != NULL)
             {
-              KeGetCurrentPrcb()->NpxThread = NULL;
-              FxSaveArea = (PFX_SAVE_AREA)((char
*)NpxThread->InitialStack - sizeof (FX_SAVE_AREA));
-              /* the fnsave might raise a delayed #MF exception */
-              if (FxsrSupport)
+                KeGetCurrentPrcb()->NpxThread = NULL;
+                FxSaveArea = (PFX_SAVE_AREA)((char
*)NpxThread->InitialStack - sizeof (FX_SAVE_AREA));
+                /* the fnsave might raise a delayed #MF exception */
+                if (FxsrSupport)
                 {
-                  asm volatile("fxsave %0" : :
"m"(FxSaveArea->U.FxArea));
+                    asm volatile("fxsave %0" : :
"m"(FxSaveArea->U.FxArea));
                 }
-              else
+                else
                 {
-                  asm volatile("fnsave %0" : :
"m"(FxSaveArea->U.FnArea));
-                  FpuInitialized = TRUE;
+                    asm volatile("fnsave %0" : :
"m"(FxSaveArea->U.FnArea));
+                    FpuInitialized = TRUE;
                 }
-              NpxThread->NpxState = NPX_STATE_VALID;
+                NpxThread->NpxState = NPX_STATE_VALID;
             }
 #endif /* !CONFIG_SMP */

-          /* restore the state of the current thread */
-          ASSERT((CurrentThread->NpxState & NPX_STATE_DIRTY) == 0);
-          FxSaveArea = (PFX_SAVE_AREA)((char
*)CurrentThread->InitialStack - sizeof (FX_SAVE_AREA));
-          if (CurrentThread->NpxState & NPX_STATE_VALID)
+            /* restore the state of the current thread */
+            ASSERT((CurrentThread->NpxState & NPX_STATE_DIRTY) == 0);
+            FxSaveArea = (PFX_SAVE_AREA)((char
*)CurrentThread->InitialStack - sizeof (FX_SAVE_AREA));
+            if (CurrentThread->NpxState & NPX_STATE_VALID)
             {
-              if (FxsrSupport)
+                if (FxsrSupport)
                 {
                   FxSaveArea->U.FxArea.MXCsr &= MxcsrFeatureMask;
                   asm volatile("fxrstor %0" : :
"m"(FxSaveArea->U.FxArea));
                 }
-              else
+                else
                 {
                   asm volatile("frstor %0" : :
"m"(FxSaveArea->U.FnArea));
                 }
             }
-          else /* NpxState & NPX_STATE_INVALID */
+            else /* NpxState & NPX_STATE_INVALID */
             {
-              DPRINT("Setting up clean FPU state\n");
-              if (FxsrSupport)
+                DPRINT("Setting up clean FPU state\n");
+                if (FxsrSupport)
                 {
-                  memset(&FxSaveArea->U.FxArea, 0,
sizeof(FxSaveArea->U.FxArea));
-                  FxSaveArea->U.FxArea.ControlWord = 0x037f;
-                  if (XmmSupport)
+                    memset(&FxSaveArea->U.FxArea, 0,
sizeof(FxSaveArea->U.FxArea));
+                    FxSaveArea->U.FxArea.ControlWord = 0x037f;
+                    if (XmmSupport)
                     {
-                      FxSaveArea->U.FxArea.MXCsr = 0x00001f80 &
MxcsrFeatureMask;
+                        FxSaveArea->U.FxArea.MXCsr = 0x00001f80 &
MxcsrFeatureMask;
                     }
-                  asm volatile("fxrstor %0" : :
"m"(FxSaveArea->U.FxArea));
+                    asm volatile("fxrstor %0" : :
"m"(FxSaveArea->U.FxArea));
                 }
-              else if (!FpuInitialized)
+                else if (!FpuInitialized)
                 {
-                  asm volatile("finit");
+                    asm volatile("finit");
                 }
             }
-          KeGetCurrentPrcb()->NpxThread = CurrentThread;
+            KeGetCurrentPrcb()->NpxThread = CurrentThread;
 #ifndef CONFIG_SMP
         }
 #endif

-      CurrentThread->NpxState |= NPX_STATE_DIRTY;
-      KeLowerIrql(oldIrql);
-      DPRINT("Device not present exception handled!\n");
+        CurrentThread->NpxState |= NPX_STATE_DIRTY;
+        KeLowerIrql(oldIrql);
+        DPRINT("Device not present exception handled!\n");

-      return STATUS_SUCCESS;
+        return STATUS_SUCCESS;
     }
-  else /* ExceptionNr == 16 || ExceptionNr == 19 */
+    else /* ExceptionNr == 16 || ExceptionNr == 19 */
     {
-      EXCEPTION_RECORD Er;
-      UCHAR DummyContext[sizeof(CONTEXT) + 16];
-      PCONTEXT Context;
-      KPROCESSOR_MODE PreviousMode;
-      PKTHREAD CurrentThread, NpxThread;
-      KIRQL oldIrql;
+        EXCEPTION_RECORD Er;
+        UCHAR DummyContext[sizeof(CONTEXT) + 16];
+        PCONTEXT Context;
+        KPROCESSOR_MODE PreviousMode;
+        PKTHREAD CurrentThread, NpxThread;
+        KIRQL oldIrql;

-      ASSERT(ExceptionNr == 16 || ExceptionNr == 19); /* math fault or
XMM fault*/
+        ASSERT(ExceptionNr == 16 || ExceptionNr == 19); /* math fault
or XMM fault*/

-      KeRaiseIrql(DISPATCH_LEVEL, &oldIrql);
+        KeRaiseIrql(DISPATCH_LEVEL, &oldIrql);

-      NpxThread = KeGetCurrentPrcb()->NpxThread;
-      CurrentThread = KeGetCurrentThread();
-      if (NpxThread == NULL)
+        NpxThread = KeGetCurrentPrcb()->NpxThread;
+        CurrentThread = KeGetCurrentThread();
+        if (NpxThread == NULL)
         {
-          KeLowerIrql(oldIrql);
-          DPRINT1("!!! Math/Xmm fault ignored! (NpxThread == NULL)\n");
-          return STATUS_SUCCESS;
+            KeLowerIrql(oldIrql);
+            DPRINT1("!!! Math/Xmm fault ignored! (NpxThread ==
NULL)\n");
+            return STATUS_SUCCESS;
         }

-      PreviousMode = ((Tf->Cs & 0xffff) == USER_CS) ? (UserMode) :
(KernelMode);
-      DPRINT("Math/Xmm fault happened! (PreviousMode = %s)\n",
-              (PreviousMode != KernelMode) ? ("UserMode") :
("KernelMode"));
+        PreviousMode = ((Tf->Cs & 0xffff) == USER_CS) ? (UserMode) :
(KernelMode);
+        DPRINT("Math/Xmm fault happened! (PreviousMode = %s)\n",
+               (PreviousMode != KernelMode) ? ("UserMode") :
("KernelMode"));

-      ASSERT(NpxThread == CurrentThread); /* FIXME: Is not always true
I think */
+        ASSERT(NpxThread == CurrentThread); /* FIXME: Is not always
true I think */

-      /* For fxsave we have to align Context->ExtendedRegisters on 16
bytes */
-      Context = (PCONTEXT)DummyContext;
-      Context = (PCONTEXT)((ULONG_PTR)Context + 0x10 -
((ULONG_PTR)Context->ExtendedRegisters & 0x0f));
+        /* For fxsave we have to align Context->ExtendedRegisters on 16
bytes */
+        Context = (PCONTEXT)DummyContext;
+        Context = (PCONTEXT)((ULONG_PTR)Context + 0x10 -
((ULONG_PTR)Context->ExtendedRegisters & 0x0f));

-      /* Get FPU/XMM state */
-      Context->FloatSave.Cr0NpxState = 0;
-      if (FxsrSupport)
+        /* Get FPU/XMM state */
+        Context->FloatSave.Cr0NpxState = 0;
+        if (FxsrSupport)
         {
-          PFXSAVE_FORMAT FxSave =
(PFXSAVE_FORMAT)Context->ExtendedRegisters;
-          FxSave->MXCsrMask = MxcsrFeatureMask;
-          memset(FxSave->RegisterArea, 0, sizeof(FxSave->RegisterArea)
+
-                 sizeof(FxSave->Reserved3) +
sizeof(FxSave->Reserved4));
-          asm volatile("fxsave %0" : : "m"(*FxSave));
-          KeLowerIrql(oldIrql);
-          KiFxsaveToFnsaveFormat((PFNSAVE_FORMAT)&Context->FloatSave,
FxSave);
+            PFXSAVE_FORMAT FxSave =
(PFXSAVE_FORMAT)Context->ExtendedRegisters;
+            FxSave->MXCsrMask = MxcsrFeatureMask;
+            memset(FxSave->RegisterArea, 0,
sizeof(FxSave->RegisterArea) +
+                   sizeof(FxSave->Reserved3) +
sizeof(FxSave->Reserved4));
+            asm volatile("fxsave %0" : : "m"(*FxSave));
+            KeLowerIrql(oldIrql);
+            KiFxsaveToFnsaveFormat((PFNSAVE_FORMAT)&Context->FloatSave,
FxSave);
         }
-      else
+        else
         {
-          PFNSAVE_FORMAT FnSave = (PFNSAVE_FORMAT)&Context->FloatSave;
-          asm volatile("fnsave %0" : : "m"(*FnSave));
-          KeLowerIrql(oldIrql);
-
KiFnsaveToFxsaveFormat((PFXSAVE_FORMAT)Context->ExtendedRegisters,
FnSave);
+            PFNSAVE_FORMAT FnSave =
(PFNSAVE_FORMAT)&Context->FloatSave;
+            asm volatile("fnsave %0" : : "m"(*FnSave));
+            KeLowerIrql(oldIrql);
+
KiFnsaveToFxsaveFormat((PFXSAVE_FORMAT)Context->ExtendedRegisters,
FnSave);
         }

-      /* Fill the rest of the context */
-      Context->ContextFlags = CONTEXT_FULL;
-      KeTrapFrameToContext(Tf, NULL, Context);
-      Context->ContextFlags |= CONTEXT_FLOATING_POINT |
CONTEXT_EXTENDED_REGISTERS;
+        /* Fill the rest of the context */
+        Context->ContextFlags = CONTEXT_FULL;
+        KeTrapFrameToContext(Tf, NULL, Context);
+        Context->ContextFlags |= CONTEXT_FLOATING_POINT |
CONTEXT_EXTENDED_REGISTERS;

-      /* Determine exception code */
-      if (ExceptionNr == 16)
+        /* Determine exception code */
+        if (ExceptionNr == 16)
         {
-          USHORT FpuStatusWord = Context->FloatSave.StatusWord &
0xffff;
-          DPRINT("FpuStatusWord = 0x%04x\n", FpuStatusWord);
+            USHORT FpuStatusWord = Context->FloatSave.StatusWord &
0xffff;
+            DPRINT("FpuStatusWord = 0x%04x\n", FpuStatusWord);

-          if (FpuStatusWord & X87_SW_IE)
-            Er.ExceptionCode = STATUS_FLOAT_INVALID_OPERATION;
-          else if (FpuStatusWord & X87_SW_DE)
-            Er.ExceptionCode = STATUS_FLOAT_DENORMAL_OPERAND;
-          else if (FpuStatusWord & X87_SW_ZE)
-            Er.ExceptionCode = STATUS_FLOAT_DIVIDE_BY_ZERO;
-          else if (FpuStatusWord & X87_SW_OE)
-            Er.ExceptionCode = STATUS_FLOAT_OVERFLOW;
-          else if (FpuStatusWord & X87_SW_UE)
-            Er.ExceptionCode = STATUS_FLOAT_UNDERFLOW;
-          else if (FpuStatusWord & X87_SW_PE)
-            Er.ExceptionCode = STATUS_FLOAT_INEXACT_RESULT;
-          else if (FpuStatusWord & X87_SW_SE)
-            Er.ExceptionCode = STATUS_FLOAT_STACK_CHECK;
-          else
-            ASSERT(0); /* not reached */
-          /* FIXME: is this the right way to get the correct EIP of the
faulting instruction? */
-          Er.ExceptionAddress = (PVOID)Context->FloatSave.ErrorOffset;
+            if (FpuStatusWord & X87_SW_IE)
+                Er.ExceptionCode = STATUS_FLOAT_INVALID_OPERATION;
+            else if (FpuStatusWord & X87_SW_DE)
+                Er.ExceptionCode = STATUS_FLOAT_DENORMAL_OPERAND;
+            else if (FpuStatusWord & X87_SW_ZE)
+                Er.ExceptionCode = STATUS_FLOAT_DIVIDE_BY_ZERO;
+            else if (FpuStatusWord & X87_SW_OE)
+               Er.ExceptionCode = STATUS_FLOAT_OVERFLOW;
+            else if (FpuStatusWord & X87_SW_UE)
+                Er.ExceptionCode = STATUS_FLOAT_UNDERFLOW;
+            else if (FpuStatusWord & X87_SW_PE)
+                Er.ExceptionCode = STATUS_FLOAT_INEXACT_RESULT;
+            else if (FpuStatusWord & X87_SW_SE)
+                Er.ExceptionCode = STATUS_FLOAT_STACK_CHECK;
+            else
+                ASSERT(0); /* not reached */
+            /* FIXME: is this the right way to get the correct EIP of
the faulting instruction? */
+            Er.ExceptionAddress =
(PVOID)Context->FloatSave.ErrorOffset;
         }
-      else /* ExceptionNr == 19 */
+        else /* ExceptionNr == 19 */
         {
-          /* FIXME: When should we use STATUS_FLOAT_MULTIPLE_FAULTS? */
-          Er.ExceptionCode = STATUS_FLOAT_MULTIPLE_TRAPS;
-          Er.ExceptionAddress = (PVOID)Tf->Eip;
+            /* FIXME: When should we use STATUS_FLOAT_MULTIPLE_FAULTS?
*/
+            Er.ExceptionCode = STATUS_FLOAT_MULTIPLE_TRAPS;
+            Er.ExceptionAddress = (PVOID)Tf->Eip;
         }

-      Er.ExceptionFlags = 0;
-      Er.ExceptionRecord = NULL;
-      Er.NumberParameters = 0;
+        Er.ExceptionFlags = 0;
+        Er.ExceptionRecord = NULL;
+        Er.NumberParameters = 0;

-      /* Dispatch exception */
-      DPRINT("Dispatching exception (ExceptionCode = 0x%08x)\n",
Er.ExceptionCode);
-      KiDispatchException(&Er, NULL, Tf, PreviousMode, TRUE);
+        /* Dispatch exception */
+        DPRINT("Dispatching exception (ExceptionCode = 0x%08x)\n",
Er.ExceptionCode);
+        KiDispatchException(&Er, NULL, Tf, PreviousMode, TRUE);

-      DPRINT("Math-fault handled!\n");
-      return STATUS_SUCCESS;
+        DPRINT("Math-fault handled!\n");
+        return STATUS_SUCCESS;
     }

-  return STATUS_UNSUCCESSFUL;
+    return STATUS_UNSUCCESSFUL;
 }
-