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1 | /* |
2 | * (C) GraÅžvydas "notaz" Ignotas, 2010 |
3 | * |
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4 | * This work is licensed under the terms of any of these licenses |
5 | * (at your option): |
6 | * - GNU GPL, version 2 or later. |
7 | * - GNU LGPL, version 2.1 or later. |
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8 | * See the COPYING file in the top-level directory. |
9 | */ |
10 | |
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11 | #include "arm_features.h" |
12 | |
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13 | .text |
14 | .align 2 |
15 | |
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16 | FUNCTION(bgr555_to_rgb565): |
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17 | pld [r1] |
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18 | mov r3, #0x07c0 |
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19 | vdup.16 q15, r3 |
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20 | subs r2, r2, #64 |
21 | blt btr16_end64 |
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22 | 0: |
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23 | pld [r1, #64*2] |
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24 | vldmia r1!, {q0-q3} |
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25 | vshl.u16 q4, q0, #11 |
26 | vshl.u16 q5, q1, #11 |
27 | vshl.u16 q6, q2, #11 |
28 | vshl.u16 q7, q3, #11 |
29 | vsri.u16 q4, q0, #10 |
30 | vsri.u16 q5, q1, #10 |
31 | vsri.u16 q6, q2, #10 |
32 | vsri.u16 q7, q3, #10 |
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33 | vshl.u16 q0, q0, #1 |
34 | vshl.u16 q1, q1, #1 |
35 | vshl.u16 q2, q2, #1 |
36 | vshl.u16 q3, q3, #1 |
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37 | vbit q4, q0, q15 |
38 | vbit q5, q1, q15 |
39 | vbit q6, q2, q15 |
40 | vbit q7, q3, q15 |
41 | vstmia r0!, {q4-q7} |
42 | subs r2, r2, #64 |
43 | bge 0b |
44 | |
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45 | btr16_end64: |
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46 | adds r2, r2, #64 |
47 | bxeq lr |
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48 | subs r2, r2, #16 |
49 | blt btr16_end16 |
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50 | |
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51 | @ handle the remainder (reasonably rare) |
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52 | 0: |
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53 | vld1.16 {q0}, [r1]! |
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54 | vshl.u16 q1, q0, #11 |
55 | vshl.u16 q2, q0, #1 |
56 | vsri.u16 q1, q0, #10 |
57 | vbit q1, q2, q15 |
58 | subs r2, r2, #16 |
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59 | vst1.16 {q1}, [r0]! |
60 | bge 0b |
61 | |
62 | btr16_end16: |
63 | adds r2, r2, #16 |
64 | bxeq lr |
65 | subs r2, r2, #8 |
66 | bxlt lr |
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67 | |
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68 | @ very rare |
69 | vld1.16 d0, [r1]! |
70 | vshl.u16 d1, d0, #11 |
71 | vshl.u16 d2, d0, #1 |
72 | vsri.u16 d1, d0, #10 |
73 | vbit d1, d2, d30 |
74 | vst1.16 d1, [r0]! |
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75 | bx lr |
76 | |
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77 | |
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78 | FUNCTION(bgr888_to_rgb888): |
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79 | pld [r1] |
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80 | @ r2 /= 48 |
81 | mov r2, r2, lsr #4 |
82 | movw r3, #0x5556 |
83 | movt r3, #0x5555 |
84 | umull r12,r2, r3, r2 |
85 | 0: |
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86 | pld [r1, #48*3] |
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87 | vld3.8 {d0-d2}, [r1, :64]! |
88 | vld3.8 {d3-d5}, [r1, :64]! |
89 | vswp d0, d2 |
90 | vswp d3, d5 |
91 | vst3.8 {d0-d2}, [r0, :64]! |
92 | vst3.8 {d3-d5}, [r0, :64]! |
93 | subs r2, r2, #1 |
94 | bne 0b |
95 | |
96 | bx lr |
97 | |
98 | |
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99 | FUNCTION(bgr888_to_rgb565): |
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100 | pld [r1] |
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101 | @ r2 /= 48 |
102 | mov r2, r2, lsr #4 |
103 | movw r3, #0x5556 |
104 | movt r3, #0x5555 |
105 | umull r12,r2, r3, r2 |
106 | |
107 | mov r3, #0x07e0 |
108 | vdup.16 q15, r3 |
109 | 0: |
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110 | pld [r1, #48*3] |
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111 | vld3.8 {d1-d3}, [r1, :64]! |
112 | vld3.8 {d5-d7}, [r1, :64]! |
113 | |
114 | vshll.u8 q8, d2, #3 @ g |
115 | vshll.u8 q9, d6, #3 |
116 | vshr.u8 d0, d3, #3 @ b |
117 | vshr.u8 d4, d7, #3 |
118 | vzip.8 d0, d1 @ rb |
119 | vzip.8 d4, d5 |
120 | vbit q0, q8, q15 |
121 | vbit q2, q9, q15 |
122 | |
123 | vstmia r0!, {d0,d1} |
124 | vstmia r0!, {d4,d5} |
125 | subs r2, r2, #1 |
126 | bne 0b |
127 | |
128 | bx lr |
129 | |
130 | |
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131 | FUNCTION(rgb888_to_rgb565): |
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132 | pld [r1] |
133 | @ r2 /= 48 |
134 | mov r2, r2, lsr #4 |
135 | movw r3, #0x5556 |
136 | movt r3, #0x5555 |
137 | umull r12,r2, r3, r2 |
138 | |
139 | mov r3, #0x07e0 |
140 | vdup.16 q15, r3 |
141 | 0: |
142 | pld [r1, #48*3] |
143 | vld3.8 {d1-d3}, [r1, :64]! |
144 | vld3.8 {d5-d7}, [r1, :64]! |
145 | |
146 | vshll.u8 q8, d2, #3 @ g |
147 | vshll.u8 q9, d6, #3 |
148 | vshr.u8 d2, d1, #3 @ b |
149 | vshr.u8 d6, d5, #3 |
150 | vzip.8 d2, d3 @ rb |
151 | vzip.8 d6, d7 |
152 | vbit q1, q8, q15 |
153 | vbit q3, q9, q15 |
154 | |
155 | vstmia r0!, {d2,d3} |
156 | vstmia r0!, {d6,d7} |
157 | subs r2, r2, #1 |
158 | bne 0b |
159 | |
160 | bx lr |
161 | |
162 | |
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163 | @ vim:filetype=armasm |