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
WebPInitSamplersMIPSdspR2(void)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