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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 | |
11 | .text |
12 | .align 2 |
13 | |
14 | .global bgr555_to_rgb565 |
15 | bgr555_to_rgb565: |
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16 | mov r3, #0x07c0 |
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17 | vdup.16 q15, r3 |
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18 | sub r2, r2, #64 |
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19 | 0: |
20 | vldmia r1!, {q0-q3} |
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21 | vshl.u16 q4, q0, #11 |
22 | vshl.u16 q5, q1, #11 |
23 | vshl.u16 q6, q2, #11 |
24 | vshl.u16 q7, q3, #11 |
25 | vsri.u16 q4, q0, #10 |
26 | vsri.u16 q5, q1, #10 |
27 | vsri.u16 q6, q2, #10 |
28 | vsri.u16 q7, q3, #10 |
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29 | vshl.u16 q0, q0, #1 |
30 | vshl.u16 q1, q1, #1 |
31 | vshl.u16 q2, q2, #1 |
32 | vshl.u16 q3, q3, #1 |
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33 | vbit q4, q0, q15 |
34 | vbit q5, q1, q15 |
35 | vbit q6, q2, q15 |
36 | vbit q7, q3, q15 |
37 | vstmia r0!, {q4-q7} |
38 | subs r2, r2, #64 |
39 | bge 0b |
40 | |
41 | adds r2, r2, #64 |
42 | bxeq lr |
43 | |
44 | @ handle the remainder |
45 | 0: |
46 | vld1.16 {q0}, [r1, :64]! |
47 | vshl.u16 q1, q0, #11 |
48 | vshl.u16 q2, q0, #1 |
49 | vsri.u16 q1, q0, #10 |
50 | vbit q1, q2, q15 |
51 | subs r2, r2, #16 |
52 | vst1.16 {q1}, [r0, :64]! |
53 | bgt 0b |
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54 | |
55 | bx lr |
56 | |
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57 | |
58 | .global bgr888_to_rgb888 |
59 | bgr888_to_rgb888: |
60 | @ r2 /= 48 |
61 | mov r2, r2, lsr #4 |
62 | movw r3, #0x5556 |
63 | movt r3, #0x5555 |
64 | umull r12,r2, r3, r2 |
65 | 0: |
66 | vld3.8 {d0-d2}, [r1, :64]! |
67 | vld3.8 {d3-d5}, [r1, :64]! |
68 | vswp d0, d2 |
69 | vswp d3, d5 |
70 | vst3.8 {d0-d2}, [r0, :64]! |
71 | vst3.8 {d3-d5}, [r0, :64]! |
72 | subs r2, r2, #1 |
73 | bne 0b |
74 | |
75 | bx lr |
76 | |
77 | |
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78 | @ vim:filetype=armasm |