From 1760cf81e4b1847c6823ea3514a78dd120e19b6e Mon Sep 17 00:00:00 2001 From: Guo Mang Date: Thu, 22 Dec 2016 15:57:14 +0800 Subject: MdePkg: Move to new location Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Guo Mang --- Core/MdePkg/Library/BaseLib/Ia32/DivU64x32.c | 50 ++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 Core/MdePkg/Library/BaseLib/Ia32/DivU64x32.c (limited to 'Core/MdePkg/Library/BaseLib/Ia32/DivU64x32.c') diff --git a/Core/MdePkg/Library/BaseLib/Ia32/DivU64x32.c b/Core/MdePkg/Library/BaseLib/Ia32/DivU64x32.c new file mode 100644 index 0000000000..3c3620ba60 --- /dev/null +++ b/Core/MdePkg/Library/BaseLib/Ia32/DivU64x32.c @@ -0,0 +1,50 @@ +/** @file + Calculate the quotient of a 64-bit integer by a 32-bit integer + + Copyright (c) 2006 - 2010, 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. + +**/ + + + + +/** + Divides a 64-bit unsigned integer by a 32-bit unsigned integer and + generates a 64-bit unsigned result. + + This function divides the 64-bit unsigned value Dividend by the 32-bit + unsigned value Divisor and generates a 64-bit unsigned quotient. This + function returns the 64-bit unsigned quotient. + + @param Dividend A 64-bit unsigned value. + @param Divisor A 32-bit unsigned value. + + @return Dividend / Divisor + +**/ +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 + } +} + -- cgit v1.2.3