87 lines
1.2 KiB
C
87 lines
1.2 KiB
C
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/*++
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Copyright (c) 1998 Intel Corporation
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Module Name:
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math.c
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Abstract:
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Revision History
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--*/
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#include "lib.h"
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/*
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* Declare runtime functions
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*/
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#ifdef RUNTIME_CODE
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#pragma RUNTIME_CODE(LShiftU64)
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#pragma RUNTIME_CODE(RShiftU64)
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#pragma RUNTIME_CODE(MultU64x32)
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#pragma RUNTIME_CODE(DivU64x32)
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#endif
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/*
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*
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*/
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UINT64
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LShiftU64 (
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IN UINT64 Operand,
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IN UINTN Count
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)
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/* Left shift 64bit by 32bit and get a 64bit result */
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{
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return Operand << Count;
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}
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UINT64
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RShiftU64 (
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IN UINT64 Operand,
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IN UINTN Count
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)
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/* Right shift 64bit by 32bit and get a 64bit result */
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{
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return Operand >> Count;
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}
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UINT64
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MultU64x32 (
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IN UINT64 Multiplicand,
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IN UINTN Multiplier
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)
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/* Multiple 64bit by 32bit and get a 64bit result */
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{
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return Multiplicand * Multiplier;
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}
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UINT64
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DivU64x32 (
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IN UINT64 Dividend,
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IN UINTN Divisor,
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OUT UINTN *Remainder OPTIONAL
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)
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/* divide 64bit by 32bit and get a 64bit result
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* N.B. only works for 31bit divisors!! */
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{
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ASSERT (Divisor != 0);
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if (Remainder) {
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*Remainder = Dividend % Divisor;
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}
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return Dividend / Divisor;
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}
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