diff options
| author | mdkinney <mdkinney@6f19259b-4bc3-4df7-8a09-765794883524> | 2006-09-19 19:04:40 +0000 |
|---|---|---|
| committer | mdkinney <mdkinney@6f19259b-4bc3-4df7-8a09-765794883524> | 2006-09-19 19:04:40 +0000 |
| commit | 23086ba84cbb13350a2464b857b197eef67f1361 (patch) | |
| tree | 4b84f42f6ed01e4db5f0dfc34440b06d348137ad /MdePkg/Library/BaseLib/Ia32/DivU64x32.c | |
| parent | b0537818290619c85993136877afae37492fe5e0 (diff) | |
| download | edk2-platforms-23086ba84cbb13350a2464b857b197eef67f1361.tar.xz | |
Optimize the size of the Base Library for the MSFT 32-bit tool chains by taking advantage of inline assembly.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1567 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BaseLib/Ia32/DivU64x32.c')
| -rw-r--r-- | MdePkg/Library/BaseLib/Ia32/DivU64x32.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Ia32/DivU64x32.c b/MdePkg/Library/BaseLib/Ia32/DivU64x32.c new file mode 100644 index 0000000000..dd732158c8 --- /dev/null +++ b/MdePkg/Library/BaseLib/Ia32/DivU64x32.c @@ -0,0 +1,36 @@ +/** @file
+ Calculate the quotient of a 64-bit integer by a 32-bit integer
+
+ 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.
+
+**/
+
+#if _MSC_EXTENSIONS
+
+UINT64
+EFIAPI
+InternalMathDivU64x32 (
+ IN UINT64 Dividend,
+ IN UINT32 Divisor
+ )
+{
+ _asm {
+ mov eax, dword ptr [Dividend + 4]
+ mov ecx, Divisor
+ xor edx, edx
+ div ecx
+ push eax ; save quotient on stack
+ mov eax, dword ptr [Dividend]
+ div ecx
+ pop edx ; restore high-order dword of the quotient
+ }
+}
+
+#endif
|