Rev 2726 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2726 | vana | 1 | /*++ |
| 2 | |||
| 3 | Copyright (c) 1998 Intel Corporation |
||
| 4 | |||
| 5 | Module Name: |
||
| 6 | |||
| 7 | math.c |
||
| 8 | |||
| 9 | Abstract: |
||
| 10 | |||
| 11 | |||
| 12 | |||
| 13 | |||
| 14 | Revision History |
||
| 15 | |||
| 16 | --*/ |
||
| 17 | |||
| 18 | #include "lib.h" |
||
| 19 | |||
| 20 | |||
| 21 | // |
||
| 22 | // Declare runtime functions |
||
| 23 | // |
||
| 24 | |||
| 25 | #ifdef RUNTIME_CODE |
||
| 26 | #pragma RUNTIME_CODE(LShiftU64) |
||
| 27 | #pragma RUNTIME_CODE(RShiftU64) |
||
| 28 | #pragma RUNTIME_CODE(MultU64x32) |
||
| 29 | #pragma RUNTIME_CODE(DivU64x32) |
||
| 30 | #endif |
||
| 31 | |||
| 32 | // |
||
| 33 | // |
||
| 34 | // |
||
| 35 | |||
| 36 | |||
| 37 | |||
| 38 | |||
| 39 | UINT64 |
||
| 40 | LShiftU64 ( |
||
| 41 | IN UINT64 Operand, |
||
| 42 | IN UINTN Count |
||
| 43 | ) |
||
| 44 | // Left shift 64bit by 32bit and get a 64bit result |
||
| 45 | { |
||
| 46 | return Operand << Count; |
||
| 47 | } |
||
| 48 | |||
| 49 | UINT64 |
||
| 50 | RShiftU64 ( |
||
| 51 | IN UINT64 Operand, |
||
| 52 | IN UINTN Count |
||
| 53 | ) |
||
| 54 | // Right shift 64bit by 32bit and get a 64bit result |
||
| 55 | { |
||
| 56 | return Operand >> Count; |
||
| 57 | } |
||
| 58 | |||
| 59 | |||
| 60 | UINT64 |
||
| 61 | MultU64x32 ( |
||
| 62 | IN UINT64 Multiplicand, |
||
| 63 | IN UINTN Multiplier |
||
| 64 | ) |
||
| 65 | // Multiple 64bit by 32bit and get a 64bit result |
||
| 66 | { |
||
| 67 | return Multiplicand * Multiplier; |
||
| 68 | } |
||
| 69 | |||
| 70 | UINT64 |
||
| 71 | DivU64x32 ( |
||
| 72 | IN UINT64 Dividend, |
||
| 73 | IN UINTN Divisor, |
||
| 74 | OUT UINTN *Remainder OPTIONAL |
||
| 75 | ) |
||
| 76 | // divide 64bit by 32bit and get a 64bit result |
||
| 77 | // N.B. only works for 31bit divisors!! |
||
| 78 | { |
||
| 79 | ASSERT (Divisor != 0); |
||
| 80 | |||
| 81 | if (Remainder) { |
||
| 82 | *Remainder = Dividend % Divisor; |
||
| 83 | } |
||
| 84 | |||
| 85 | return Dividend / Divisor; |
||
| 86 | } |