1 | // Copyright 2014 Google Inc. All Rights Reserved. |
2 | // |
3 | // Use of this source code is governed by a BSD-style license |
4 | // that can be found in the COPYING file in the root of the source |
5 | // tree. An additional intellectual property rights grant can be found |
6 | // in the file PATENTS. All contributing project authors may |
7 | // be found in the AUTHORS file in the root of the source tree. |
8 | // ----------------------------------------------------------------------------- |
9 | // |
10 | // MIPS DSPr2 version of YUV to RGB upsampling functions. |
11 | // |
12 | // Author(s): Branimir Vasic (branimir.vasic@imgtec.com) |
13 | // Djordje Pesut (djordje.pesut@imgtec.com) |
14 | |
15 | #include "src/dsp/dsp.h" |
16 | |
17 | #if defined(WEBP_USE_MIPS_DSP_R2) |
18 | |
19 | #include "src/dsp/yuv.h" |
20 | |
21 | //------------------------------------------------------------------------------ |
22 | // simple point-sampling |
23 | |
24 | #define ROW_FUNC_PART_1() \ |
25 | "lbu %[temp3], 0(%[v]) \n\t" \ |
26 | "lbu %[temp4], 0(%[u]) \n\t" \ |
27 | "lbu %[temp0], 0(%[y]) \n\t" \ |
28 | "mul %[temp1], %[t_con_1], %[temp3] \n\t" \ |
29 | "mul %[temp3], %[t_con_2], %[temp3] \n\t" \ |
30 | "mul %[temp2], %[t_con_3], %[temp4] \n\t" \ |
31 | "mul %[temp4], %[t_con_4], %[temp4] \n\t" \ |
32 | "mul %[temp0], %[t_con_5], %[temp0] \n\t" \ |
33 | "subu %[temp1], %[temp1], %[t_con_6] \n\t" \ |
34 | "subu %[temp3], %[temp3], %[t_con_7] \n\t" \ |
35 | "addu %[temp2], %[temp2], %[temp3] \n\t" \ |
36 | "subu %[temp4], %[temp4], %[t_con_8] \n\t" \ |
37 | |
38 | #define ROW_FUNC_PART_2(R, G, B, K) \ |
39 | "addu %[temp5], %[temp0], %[temp1] \n\t" \ |
40 | "subu %[temp6], %[temp0], %[temp2] \n\t" \ |
41 | "addu %[temp7], %[temp0], %[temp4] \n\t" \ |
42 | ".if " #K " \n\t" \ |
43 | "lbu %[temp0], 1(%[y]) \n\t" \ |
44 | ".endif \n\t" \ |
45 | "shll_s.w %[temp5], %[temp5], 17 \n\t" \ |
46 | "shll_s.w %[temp6], %[temp6], 17 \n\t" \ |
47 | ".if " #K " \n\t" \ |
48 | "mul %[temp0], %[t_con_5], %[temp0] \n\t" \ |
49 | ".endif \n\t" \ |
50 | "shll_s.w %[temp7], %[temp7], 17 \n\t" \ |
51 | "precrqu_s.qb.ph %[temp5], %[temp5], $zero \n\t" \ |
52 | "precrqu_s.qb.ph %[temp6], %[temp6], $zero \n\t" \ |
53 | "precrqu_s.qb.ph %[temp7], %[temp7], $zero \n\t" \ |
54 | "srl %[temp5], %[temp5], 24 \n\t" \ |
55 | "srl %[temp6], %[temp6], 24 \n\t" \ |
56 | "srl %[temp7], %[temp7], 24 \n\t" \ |
57 | "sb %[temp5], " #R "(%[dst]) \n\t" \ |
58 | "sb %[temp6], " #G "(%[dst]) \n\t" \ |
59 | "sb %[temp7], " #B "(%[dst]) \n\t" \ |
60 | |
61 | #define ASM_CLOBBER_LIST() \ |
62 | : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), \ |
63 | [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), \ |
64 | [temp6]"=&r"(temp6), [temp7]"=&r"(temp7) \ |
65 | : [t_con_1]"r"(t_con_1), [t_con_2]"r"(t_con_2), [t_con_3]"r"(t_con_3), \ |
66 | [t_con_4]"r"(t_con_4), [t_con_5]"r"(t_con_5), [t_con_6]"r"(t_con_6), \ |
67 | [u]"r"(u), [v]"r"(v), [y]"r"(y), [dst]"r"(dst), \ |
68 | [t_con_7]"r"(t_con_7), [t_con_8]"r"(t_con_8) \ |
69 | : "memory", "hi", "lo" \ |
70 | |
71 | #define ROW_FUNC(FUNC_NAME, XSTEP, R, G, B, A) \ |
72 | static void FUNC_NAME(const uint8_t* y, \ |
73 | const uint8_t* u, const uint8_t* v, \ |
74 | uint8_t* dst, int len) { \ |
75 | int i; \ |
76 | uint32_t temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7; \ |
77 | const int t_con_1 = 26149; \ |
78 | const int t_con_2 = 13320; \ |
79 | const int t_con_3 = 6419; \ |
80 | const int t_con_4 = 33050; \ |
81 | const int t_con_5 = 19077; \ |
82 | const int t_con_6 = 14234; \ |
83 | const int t_con_7 = 8708; \ |
84 | const int t_con_8 = 17685; \ |
85 | for (i = 0; i < (len >> 1); i++) { \ |
86 | __asm__ volatile ( \ |
87 | ROW_FUNC_PART_1() \ |
88 | ROW_FUNC_PART_2(R, G, B, 1) \ |
89 | ROW_FUNC_PART_2(R + XSTEP, G + XSTEP, B + XSTEP, 0) \ |
90 | ASM_CLOBBER_LIST() \ |
91 | ); \ |
92 | if (A) dst[A] = dst[A + XSTEP] = 0xff; \ |
93 | y += 2; \ |
94 | ++u; \ |
95 | ++v; \ |
96 | dst += 2 * XSTEP; \ |
97 | } \ |
98 | if (len & 1) { \ |
99 | __asm__ volatile ( \ |
100 | ROW_FUNC_PART_1() \ |
101 | ROW_FUNC_PART_2(R, G, B, 0) \ |
102 | ASM_CLOBBER_LIST() \ |
103 | ); \ |
104 | if (A) dst[A] = 0xff; \ |
105 | } \ |
106 | } |
107 | |
108 | ROW_FUNC(YuvToRgbRow_MIPSdspR2, 3, 0, 1, 2, 0) |
109 | ROW_FUNC(YuvToRgbaRow_MIPSdspR2, 4, 0, 1, 2, 3) |
110 | ROW_FUNC(YuvToBgrRow_MIPSdspR2, 3, 2, 1, 0, 0) |
111 | ROW_FUNC(YuvToBgraRow_MIPSdspR2, 4, 2, 1, 0, 3) |
112 | |
113 | #undef ROW_FUNC |
114 | #undef ASM_CLOBBER_LIST |
115 | #undef ROW_FUNC_PART_2 |
116 | #undef ROW_FUNC_PART_1 |
117 | |
118 | //------------------------------------------------------------------------------ |
119 | // Entry point |
120 | |
121 | extern void WebPInitSamplersMIPSdspR2(void); |
122 | |
123 | WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplersMIPSdspR2(void) { |
124 | WebPSamplers[MODE_RGB] = YuvToRgbRow_MIPSdspR2; |
125 | WebPSamplers[MODE_RGBA] = YuvToRgbaRow_MIPSdspR2; |
126 | WebPSamplers[MODE_BGR] = YuvToBgrRow_MIPSdspR2; |
127 | WebPSamplers[MODE_BGRA] = YuvToBgraRow_MIPSdspR2; |
128 | } |
129 | |
130 | #else // !WEBP_USE_MIPS_DSP_R2 |
131 | |
132 | WEBP_DSP_INIT_STUB(WebPInitSamplersMIPSdspR2) |
133 | |
134 | #endif // WEBP_USE_MIPS_DSP_R2 |
135 | |