diff options
| author | bbahnsen <bbahnsen@6f19259b-4bc3-4df7-8a09-765794883524> | 2006-04-21 22:54:32 +0000 |
|---|---|---|
| committer | bbahnsen <bbahnsen@6f19259b-4bc3-4df7-8a09-765794883524> | 2006-04-21 22:54:32 +0000 |
| commit | 878ddf1fc3540a715f63594ed22b6929e881afb4 (patch) | |
| tree | c56c44dac138137b510e1fba7c3efe5e4d84bea2 /MdePkg/Library/BaseLib/Math64.c | |
| download | edk2-platforms-878ddf1fc3540a715f63594ed22b6929e881afb4.tar.xz | |
Initial import.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BaseLib/Math64.c')
| -rw-r--r-- | MdePkg/Library/BaseLib/Math64.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Math64.c b/MdePkg/Library/BaseLib/Math64.c new file mode 100644 index 0000000000..27d75232c5 --- /dev/null +++ b/MdePkg/Library/BaseLib/Math64.c @@ -0,0 +1,174 @@ +/** @file
+ Leaf math worker functions that require 64-bit arithmetic support from the
+ compiler.
+
+ Copyright (c) 2006, 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.
+
+ Module Name: Math64.c
+
+**/
+
+UINT64
+EFIAPI
+InternalMathLShiftU64 (
+ IN UINT64 Operand,
+ IN UINTN Count
+ )
+{
+ return Operand << Count;
+}
+
+UINT64
+EFIAPI
+InternalMathRShiftU64 (
+ IN UINT64 Operand,
+ IN UINTN Count
+ )
+{
+ return Operand >> Count;
+}
+
+UINT64
+EFIAPI
+InternalMathARShiftU64 (
+ IN UINT64 Operand,
+ IN UINTN Count
+ )
+{
+ //
+ // Test if this compiler supports arithmetic shift
+ //
+ if ((((-1) << (sizeof (-1) * 8 - 1)) >> (sizeof (-1) * 8 - 1)) == -1) {
+ //
+ // Arithmetic shift is supported
+ //
+ return (UINT64)((INT64)Operand >> Count);
+ }
+
+ //
+ // Arithmetic is not supported
+ //
+ return (Operand >> Count) |
+ ((INTN)Operand < 0 ? ~((UINTN)-1 >> Count) : 0);
+}
+
+UINT64
+EFIAPI
+InternalMathLRotU64 (
+ IN UINT64 Operand,
+ IN UINTN Count
+ )
+{
+ return (Operand << Count) | (Operand >> (64 - Count));
+}
+
+UINT64
+EFIAPI
+InternalMathRRotU64 (
+ IN UINT64 Operand,
+ IN UINTN Count
+ )
+{
+ return (Operand >> Count) | (Operand << (64 - Count));
+}
+
+UINT64
+EFIAPI
+InternalMathSwapBytes64 (
+ IN UINT64 Operand
+ )
+{
+ return (UINT64)(
+ ((UINT64)SwapBytes32 ((UINT32)Operand) << 32) |
+ ((UINT64)SwapBytes32 ((UINT32)(Operand >> 32)))
+ );
+}
+
+UINT64
+EFIAPI
+InternalMathMultU64x32 (
+ IN UINT64 Multiplicand,
+ IN UINT32 Multiplier
+ )
+{
+ return Multiplicand * Multiplier;
+}
+
+UINT64
+EFIAPI
+InternalMathMultU64x64 (
+ IN UINT64 Multiplicand,
+ IN UINT64 Multiplier
+ )
+{
+ return Multiplicand * Multiplier;
+}
+
+UINT64
+EFIAPI
+InternalMathDivU64x32 (
+ IN UINT64 Dividend,
+ IN UINT32 Divisor
+ )
+{
+ return Dividend / Divisor;
+}
+
+UINT64
+EFIAPI
+InternalMathModU64x32 (
+ IN UINT64 Dividend,
+ IN UINT32 Divisor
+ )
+{
+ return Dividend % Divisor;
+}
+
+UINT64
+EFIAPI
+InternalMathDivRemU64x32 (
+ IN UINT64 Dividend,
+ IN UINT32 Divisor,
+ OUT UINT32 *Remainder
+ )
+{
+ if (Remainder != NULL) {
+ *Remainder = (UINT32)(Dividend % Divisor);
+ }
+ return Dividend / Divisor;
+}
+
+UINT64
+EFIAPI
+InternalMathDivRemU64x64 (
+ IN UINT64 Dividend,
+ IN UINT64 Divisor,
+ OUT UINT64 *Remainder
+ )
+{
+ if (Remainder != NULL) {
+ *Remainder = Dividend % Divisor;
+ }
+ return Dividend / Divisor;
+}
+
+INT64
+EFIAPI
+InternalMathDivRemS64x64 (
+ IN INT64 Dividend,
+ IN INT64 Divisor,
+ OUT INT64 *Remainder
+ )
+{
+ if (Remainder != NULL) {
+ *Remainder = Dividend % Divisor;
+ }
+ return Dividend / Divisor;
+}
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