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 // ARGB making functions (mips version).
11 //
12 // Author: Djordje Pesut (djordje.pesut@imgtec.com)
13
14 #include "./dsp.h"
15
16 #if defined(WEBP_USE_MIPS_DSP_R2)
17
PackARGB(const uint8_t * a,const uint8_t * r,const uint8_t * g,const uint8_t * b,int len,uint32_t * out)18 static void PackARGB(const uint8_t* a, const uint8_t* r, const uint8_t* g,
19 const uint8_t* b, int len, uint32_t* out) {
20 int temp0, temp1, temp2, temp3, offset;
21 const int rest = len & 1;
22 const uint32_t* const loop_end = out + len - rest;
23 const int step = 4;
24 __asm__ volatile (
25 "xor %[offset], %[offset], %[offset] \n\t"
26 "beq %[loop_end], %[out], 0f \n\t"
27 "2: \n\t"
28 "lbux %[temp0], %[offset](%[a]) \n\t"
29 "lbux %[temp1], %[offset](%[r]) \n\t"
30 "lbux %[temp2], %[offset](%[g]) \n\t"
31 "lbux %[temp3], %[offset](%[b]) \n\t"
32 "ins %[temp1], %[temp0], 16, 16 \n\t"
33 "ins %[temp3], %[temp2], 16, 16 \n\t"
34 "addiu %[out], %[out], 4 \n\t"
35 "precr.qb.ph %[temp0], %[temp1], %[temp3] \n\t"
36 "sw %[temp0], -4(%[out]) \n\t"
37 "addu %[offset], %[offset], %[step] \n\t"
38 "bne %[loop_end], %[out], 2b \n\t"
39 "0: \n\t"
40 "beq %[rest], $zero, 1f \n\t"
41 "lbux %[temp0], %[offset](%[a]) \n\t"
42 "lbux %[temp1], %[offset](%[r]) \n\t"
43 "lbux %[temp2], %[offset](%[g]) \n\t"
44 "lbux %[temp3], %[offset](%[b]) \n\t"
45 "ins %[temp1], %[temp0], 16, 16 \n\t"
46 "ins %[temp3], %[temp2], 16, 16 \n\t"
47 "precr.qb.ph %[temp0], %[temp1], %[temp3] \n\t"
48 "sw %[temp0], 0(%[out]) \n\t"
49 "1: \n\t"
50 : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2),
51 [temp3]"=&r"(temp3), [offset]"=&r"(offset), [out]"+&r"(out)
52 : [a]"r"(a), [r]"r"(r), [g]"r"(g), [b]"r"(b), [step]"r"(step),
53 [loop_end]"r"(loop_end), [rest]"r"(rest)
54 : "memory"
55 );
56 }
57
PackRGB(const uint8_t * r,const uint8_t * g,const uint8_t * b,int len,int step,uint32_t * out)58 static void PackRGB(const uint8_t* r, const uint8_t* g, const uint8_t* b,
59 int len, int step, uint32_t* out) {
60 int temp0, temp1, temp2, offset;
61 const int rest = len & 1;
62 const int a = 0xff;
63 const uint32_t* const loop_end = out + len - rest;
64 __asm__ volatile (
65 "xor %[offset], %[offset], %[offset] \n\t"
66 "beq %[loop_end], %[out], 0f \n\t"
67 "2: \n\t"
68 "lbux %[temp0], %[offset](%[r]) \n\t"
69 "lbux %[temp1], %[offset](%[g]) \n\t"
70 "lbux %[temp2], %[offset](%[b]) \n\t"
71 "ins %[temp0], %[a], 16, 16 \n\t"
72 "ins %[temp2], %[temp1], 16, 16 \n\t"
73 "addiu %[out], %[out], 4 \n\t"
74 "precr.qb.ph %[temp0], %[temp0], %[temp2] \n\t"
75 "sw %[temp0], -4(%[out]) \n\t"
76 "addu %[offset], %[offset], %[step] \n\t"
77 "bne %[loop_end], %[out], 2b \n\t"
78 "0: \n\t"
79 "beq %[rest], $zero, 1f \n\t"
80 "lbux %[temp0], %[offset](%[r]) \n\t"
81 "lbux %[temp1], %[offset](%[g]) \n\t"
82 "lbux %[temp2], %[offset](%[b]) \n\t"
83 "ins %[temp0], %[a], 16, 16 \n\t"
84 "ins %[temp2], %[temp1], 16, 16 \n\t"
85 "precr.qb.ph %[temp0], %[temp0], %[temp2] \n\t"
86 "sw %[temp0], 0(%[out]) \n\t"
87 "1: \n\t"
88 : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2),
89 [offset]"=&r"(offset), [out]"+&r"(out)
90 : [a]"r"(a), [r]"r"(r), [g]"r"(g), [b]"r"(b), [step]"r"(step),
91 [loop_end]"r"(loop_end), [rest]"r"(rest)
92 : "memory"
93 );
94 }
95
96 //------------------------------------------------------------------------------
97 // Entry point
98
99 extern void VP8EncDspARGBInitMIPSdspR2(void);
100
VP8EncDspARGBInitMIPSdspR2(void)101 WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspARGBInitMIPSdspR2(void) {
102 VP8PackARGB = PackARGB;
103 VP8PackRGB = PackRGB;
104 }
105
106 #else // !WEBP_USE_MIPS_DSP_R2
107
108 WEBP_DSP_INIT_STUB(VP8EncDspARGBInitMIPSdspR2)
109
110 #endif // WEBP_USE_MIPS_DSP_R2
111