/* $NetBSD: math.c,v 1.1.1.1 2014/04/01 16:16:07 jakllsch Exp $ */ /*++ Copyright (c) 1998 Intel Corporation Module Name: math.c Abstract: Revision History --*/ #include "lib.h" // // Declare runtime functions // #ifdef RUNTIME_CODE #ifndef __GNUC__ #pragma RUNTIME_CODE(LShiftU64) #pragma RUNTIME_CODE(RShiftU64) #pragma RUNTIME_CODE(MultU64x32) #pragma RUNTIME_CODE(DivU64x32) #endif #endif // // // UINT64 LShiftU64 ( IN UINT64 Operand, IN UINTN Count ) // Left shift 64bit by 32bit and get a 64bit result { return Operand << Count; } UINT64 RShiftU64 ( IN UINT64 Operand, IN UINTN Count ) // Right shift 64bit by 32bit and get a 64bit result { return Operand >> Count; } UINT64 MultU64x32 ( IN UINT64 Multiplicand, IN UINTN Multiplier ) // Multiple 64bit by 32bit and get a 64bit result { return Multiplicand * Multiplier; } UINT64 DivU64x32 ( IN UINT64 Dividend, IN UINTN Divisor, OUT UINTN *Remainder OPTIONAL ) // divide 64bit by 32bit and get a 64bit result // N.B. only works for 31bit divisors!! { ASSERT (Divisor != 0); if (Remainder) { *Remainder = Dividend % Divisor; } return Dividend / Divisor; }