Rev 2726 | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
| Rev 2726 | Rev 4687 | ||
|---|---|---|---|
| 1 | /*++ |
1 | /*++ |
| 2 | 2 | ||
| 3 | Copyright (c) 1998 Intel Corporation |
3 | Copyright (c) 1998 Intel Corporation |
| 4 | 4 | ||
| 5 | Module Name: |
5 | Module Name: |
| 6 | 6 | ||
| 7 | math.c |
7 | math.c |
| 8 | 8 | ||
| 9 | Abstract: |
9 | Abstract: |
| 10 | 10 | ||
| 11 | 11 | ||
| 12 | 12 | ||
| 13 | 13 | ||
| 14 | Revision History |
14 | Revision History |
| 15 | 15 | ||
| 16 | --*/ |
16 | --*/ |
| 17 | 17 | ||
| 18 | #include "lib.h" |
18 | #include "lib.h" |
| 19 | 19 | ||
| 20 | 20 | ||
| 21 | // |
21 | // |
| 22 | // Declare runtime functions |
22 | // Declare runtime functions |
| 23 | // |
23 | // |
| 24 | 24 | ||
| 25 | #ifdef RUNTIME_CODE |
25 | #ifdef RUNTIME_CODE |
| 26 | #pragma RUNTIME_CODE(LShiftU64) |
26 | #pragma RUNTIME_CODE(LShiftU64) |
| 27 | #pragma RUNTIME_CODE(RShiftU64) |
27 | #pragma RUNTIME_CODE(RShiftU64) |
| 28 | #pragma RUNTIME_CODE(MultU64x32) |
28 | #pragma RUNTIME_CODE(MultU64x32) |
| 29 | #pragma RUNTIME_CODE(DivU64x32) |
29 | #pragma RUNTIME_CODE(DivU64x32) |
| 30 | #endif |
30 | #endif |
| 31 | 31 | ||
| 32 | // |
32 | // |
| 33 | // |
33 | // |
| 34 | // |
34 | // |
| 35 | 35 | ||
| 36 | 36 | ||
| 37 | 37 | ||
| 38 | 38 | ||
| 39 | UINT64 |
39 | UINT64 |
| 40 | LShiftU64 ( |
40 | LShiftU64 ( |
| 41 | IN UINT64 Operand, |
41 | IN UINT64 Operand, |
| 42 | IN UINTN Count |
42 | IN UINTN Count |
| 43 | ) |
43 | ) |
| 44 | // Left shift 64bit by 32bit and get a 64bit result |
44 | // Left shift 64bit by 32bit and get a 64bit result |
| 45 | { |
45 | { |
| 46 | return Operand << Count; |
46 | return Operand << Count; |
| 47 | } |
47 | } |
| 48 | 48 | ||
| 49 | UINT64 |
49 | UINT64 |
| 50 | RShiftU64 ( |
50 | RShiftU64 ( |
| 51 | IN UINT64 Operand, |
51 | IN UINT64 Operand, |
| 52 | IN UINTN Count |
52 | IN UINTN Count |
| 53 | ) |
53 | ) |
| 54 | // Right shift 64bit by 32bit and get a 64bit result |
54 | // Right shift 64bit by 32bit and get a 64bit result |
| 55 | { |
55 | { |
| 56 | return Operand >> Count; |
56 | return Operand >> Count; |
| 57 | } |
57 | } |
| 58 | 58 | ||
| 59 | 59 | ||
| 60 | UINT64 |
60 | UINT64 |
| 61 | MultU64x32 ( |
61 | MultU64x32 ( |
| 62 | IN UINT64 Multiplicand, |
62 | IN UINT64 Multiplicand, |
| 63 | IN UINTN Multiplier |
63 | IN UINTN Multiplier |
| 64 | ) |
64 | ) |
| 65 | // Multiple 64bit by 32bit and get a 64bit result |
65 | // Multiple 64bit by 32bit and get a 64bit result |
| 66 | { |
66 | { |
| 67 | return Multiplicand * Multiplier; |
67 | return Multiplicand * Multiplier; |
| 68 | } |
68 | } |
| 69 | 69 | ||
| 70 | UINT64 |
70 | UINT64 |
| 71 | DivU64x32 ( |
71 | DivU64x32 ( |
| 72 | IN UINT64 Dividend, |
72 | IN UINT64 Dividend, |
| 73 | IN UINTN Divisor, |
73 | IN UINTN Divisor, |
| 74 | OUT UINTN *Remainder OPTIONAL |
74 | OUT UINTN *Remainder OPTIONAL |
| 75 | ) |
75 | ) |
| 76 | // divide 64bit by 32bit and get a 64bit result |
76 | // divide 64bit by 32bit and get a 64bit result |
| 77 | // N.B. only works for 31bit divisors!! |
77 | // N.B. only works for 31bit divisors!! |
| 78 | { |
78 | { |
| 79 | ASSERT (Divisor != 0); |
79 | ASSERT (Divisor != 0); |
| 80 | 80 | ||
| 81 | if (Remainder) { |
81 | if (Remainder) { |
| 82 | *Remainder = Dividend % Divisor; |
82 | *Remainder = Dividend % Divisor; |
| 83 | } |
83 | } |
| 84 | 84 | ||
| 85 | return Dividend / Divisor; |
85 | return Dividend / Divisor; |
| 86 | } |
86 | } |
| 87 | 87 | ||