Curle
d588e232c4
This branch has been dedicated to purely the UEFI bootloader. As such, all other code has been removed. This code can be compiled with Visual Studio, gcc or llvm.
89 lines
1.2 KiB
C
89 lines
1.2 KiB
C
/*++
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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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#ifndef __GNUC__
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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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#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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