1 /*
2 * Copyright 2015 Rockchip Electronics Co. LTD
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "mpp_common.h"
18
19 static const RK_U8 log2_tab[256] = {
20 0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
21 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
22 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
23 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
24 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
25 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
26 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
27 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
28 };
29
mpp_log2(RK_U32 v)30 RK_S32 mpp_log2(RK_U32 v)
31 {
32 RK_S32 n = 0;
33 if (v & 0xffff0000) {
34 v >>= 16;
35 n += 16;
36 }
37 if (v & 0xff00) {
38 v >>= 8;
39 n += 8;
40 }
41 n += log2_tab[v];
42
43 return n;
44 }
45
mpp_log2_16bit(RK_U32 v)46 RK_S32 mpp_log2_16bit(RK_U32 v)
47 {
48 RK_S32 n = 0;
49 if (v & 0xff00) {
50 v >>= 8;
51 n += 8;
52 }
53 n += log2_tab[v];
54
55 return n;
56 }
57
axb_div_c(RK_S32 a,RK_S32 b,RK_S32 c)58 RK_S32 axb_div_c(RK_S32 a, RK_S32 b, RK_S32 c)
59 {
60 RK_U32 left = 32;
61 RK_U32 right = 0;
62 RK_U32 shift;
63 RK_S32 sign = 1;
64 RK_S32 tmp;
65
66 if (a == 0 || b == 0)
67 return 0;
68 else if ((a * b / b) == a && c != 0)
69 return (a * b / c);
70
71 if (a < 0) {
72 sign = -1;
73 a = -a;
74 }
75 if (b < 0) {
76 sign *= -1;
77 b = -b;
78 }
79 if (c < 0) {
80 sign *= -1;
81 c = -c;
82 }
83
84 if (c == 0)
85 return 0x7FFFFFFF * sign;
86
87 if (b > a) {
88 tmp = b;
89 b = a;
90 a = tmp;
91 }
92
93 for (--left; (((RK_U32)a << left) >> left) != (RK_U32)a; --left)
94 ;
95
96 left--;
97
98 while (((RK_U32)b >> right) > (RK_U32)c)
99 right++;
100
101 if (right > left) {
102 return 0x7FFFFFFF * sign;
103 } else {
104 shift = left - right;
105 return (RK_S32)((((RK_U32)a << shift) /
106 (RK_U32)c * (RK_U32)b) >> shift) * sign;
107 }
108 }
109
mpp_align_16(RK_U32 val)110 RK_U32 mpp_align_16(RK_U32 val)
111 {
112 return MPP_ALIGN(val, 16);
113 }
114
mpp_align_64(RK_U32 val)115 RK_U32 mpp_align_64(RK_U32 val)
116 {
117 return MPP_ALIGN(val, 64);
118 }
119