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48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
/** @file
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Integer division worker functions for Ia32.
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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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#include "BaseLibInternals.h"
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/**
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Worker function that Divides a 64-bit signed integer by a 64-bit signed integer and
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generates a 64-bit signed result and a optional 64-bit signed remainder.
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This function divides the 64-bit signed value Dividend by the 64-bit
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signed value Divisor and generates a 64-bit signed quotient. If Remainder
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is not NULL, then the 64-bit signed remainder is returned in Remainder.
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This function returns the 64-bit signed quotient.
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@param Dividend A 64-bit signed value.
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@param Divisor A 64-bit signed value.
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@param Remainder A pointer to a 64-bit signed value. This parameter is
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optional and may be NULL.
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@return Dividend / Divisor
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**/
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INT64
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EFIAPI
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InternalMathDivRemS64x64 (
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IN INT64 Dividend,
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IN INT64 Divisor,
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OUT INT64 *Remainder OPTIONAL
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)
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{
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INT64 Quot;
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Quot = InternalMathDivRemU64x64 (
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(UINT64) (Dividend >= 0 ? Dividend : -Dividend),
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(UINT64) (Divisor >= 0 ? Divisor : -Divisor),
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(UINT64 *) Remainder
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);
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if (Remainder != NULL && Dividend < 0) {
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*Remainder = -*Remainder;
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}
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return (Dividend ^ Divisor) >= 0 ? Quot : -Quot;
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}
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