| 0,0 → 1,86 |
|---|
| /*++ |
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| Copyright (c) 1998 Intel Corporation |
| |
| Module Name: |
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| math.c |
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| Abstract: |
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| |
| |
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| Revision History |
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| --*/ |
| |
| #include "lib.h" |
| |
| |
| // |
| // Declare runtime functions |
| // |
| |
| #ifdef RUNTIME_CODE |
| #pragma RUNTIME_CODE(LShiftU64) |
| #pragma RUNTIME_CODE(RShiftU64) |
| #pragma RUNTIME_CODE(MultU64x32) |
| #pragma RUNTIME_CODE(DivU64x32) |
| #endif |
| |
| // |
| // |
| // |
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| 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; |
| } |