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MdePkg/Library/BaseLib/Ia32/DivS64x64Remainder.c

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+/** @file
+  Integer division worker functions for Ia32.
+
+  Copyright (c) 2006 - 2008, Intel Corporation<BR>
+  All rights reserved. This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "BaseLibInternals.h"
+
+/**
+  Worker function that Divides a 64-bit signed integer by a 64-bit signed integer and
+  generates a  64-bit signed result and a optional 64-bit signed remainder.
+
+  This function divides the 64-bit signed value Dividend by the 64-bit
+  signed value Divisor and generates a 64-bit signed quotient. If Remainder
+  is not NULL, then the 64-bit signed remainder is returned in Remainder.
+  This function returns the 64-bit signed quotient.
+
+  @param  Dividend  A 64-bit signed value.
+  @param  Divisor   A 64-bit signed value.
+  @param  Remainder A pointer to a 64-bit signed value. This parameter is
+                    optional and may be NULL.
+
+  @return Dividend / Divisor
+
+**/
+INT64
+EFIAPI
+InternalMathDivRemS64x64 (
+  IN      INT64                     Dividend,
+  IN      INT64                     Divisor,
+  OUT     INT64                     *Remainder  OPTIONAL
+  )
+{
+  INT64                             Quot;
+
+  Quot = InternalMathDivRemU64x64 (
+           Dividend >= 0 ? Dividend : -Dividend,
+           Divisor >= 0 ? Divisor : -Divisor,
+           (UINT64 *) Remainder
+           );
+  if (Remainder != NULL && Dividend < 0) {
+    *Remainder = -*Remainder;
+  }
+  return (Dividend ^ Divisor) >= 0 ? Quot : -Quot;
+}