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45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
/** @file
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Calculate the quotient of a 64-bit integer by a 32-bit integer
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Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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/**
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Divides a 64-bit unsigned integer by a 32-bit unsigned integer and
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generates a 64-bit unsigned result.
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This function divides the 64-bit unsigned value Dividend by the 32-bit
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unsigned value Divisor and generates a 64-bit unsigned quotient. This
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function returns the 64-bit unsigned quotient.
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@param Dividend A 64-bit unsigned value.
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@param Divisor A 32-bit unsigned value.
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@return Dividend / Divisor
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**/
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UINT64
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EFIAPI
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InternalMathDivU64x32 (
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IN UINT64 Dividend,
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IN UINT32 Divisor
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)
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{
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_asm {
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mov eax, dword ptr [Dividend + 4]
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mov ecx, Divisor
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xor edx, edx
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div ecx
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push eax ; save quotient on stack
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mov eax, dword ptr [Dividend]
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div ecx
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pop edx ; restore high-order dword of the quotient
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}
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}
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