diff options
Diffstat (limited to 'EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/Ipf/math.c')
-rw-r--r-- | EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/Ipf/math.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/Ipf/math.c b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/Ipf/math.c new file mode 100644 index 0000000000..860d1298e5 --- /dev/null +++ b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/Ipf/math.c @@ -0,0 +1,139 @@ +/*++
+
+Copyright (c) 2004, Intel Corporation
+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.
+
+Module Name:
+
+ math.c
+
+Abstract:
+
+ 64-bit Math worker functions for Intel Itanium(TM) processors.
+
+--*/
+
+#include "Tiano.h"
+#include "Pei.h"
+#include "PeiLib.h"
+
+UINT64
+LShiftU64 (
+ IN UINT64 Operand,
+ IN UINTN Count
+ )
+/*++
+
+Routine Description:
+
+ This routine allows a 64 bit value to be left shifted by 32 bits and
+ returns the shifted value.
+ Count is valid up 63. (Only Bits 0-5 is valid for Count)
+
+Arguments:
+
+ Operand - Value to be shifted
+ Count - Number of times to shift left.
+
+Returns:
+
+ Value shifted left identified by the Count.
+
+--*/
+{
+ return Operand << Count;
+}
+
+UINT64
+RShiftU64 (
+ IN UINT64 Operand,
+ IN UINTN Count
+ )
+/*++
+
+Routine Description:
+
+ This routine allows a 64 bit value to be right shifted by 32 bits and returns the
+ shifted value.
+ Count is valid up 63. (Only Bits 0-5 is valid for Count)
+
+Arguments:
+
+ Operand - Value to be shifted
+ Count - Number of times to shift right.
+
+Returns:
+
+ Value shifted right identified by the Count.
+
+--*/
+{
+ return Operand >> Count;
+}
+
+UINT64
+MultU64x32 (
+ IN UINT64 Multiplicand,
+ IN UINTN Multiplier
+ )
+/*++
+
+Routine Description:
+
+ This routine allows a 64 bit value to be multiplied with a 32 bit
+ value returns 64bit result.
+ No checking if the result is greater than 64bits
+
+Arguments:
+
+ Multiplicand - multiplicand
+ Multiplier - multiplier
+
+Returns:
+
+ Multiplicand * Multiplier
+
+--*/
+{
+ return Multiplicand * Multiplier;
+}
+
+UINT64
+DivU64x32 (
+ IN UINT64 Dividend,
+ IN UINTN Divisor,
+ OUT UINTN *Remainder OPTIONAL
+ )
+/*++
+
+Routine Description:
+
+ This routine allows a 64 bit value to be divided with a 32 bit value returns
+ 64bit result and the Remainder.
+ N.B. only works for 31bit divisors!!
+
+Arguments:
+
+ Dividend - dividend
+ Divisor - divisor
+ Remainder - buffer for remainder
+
+Returns:
+
+ Dividend / Divisor
+ Remainder = Dividend mod Divisor
+
+--*/
+{
+ if (Remainder) {
+ *Remainder = Dividend % Divisor;
+ }
+
+ return Dividend / Divisor;
+}
|