a327967e |
1 | /* |
2 | * (C) GraÅžvydas "notaz" Ignotas, 2010 |
3 | * |
69af03a2 |
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. |
a327967e |
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: |
d352cde2 |
16 | mov r3, #0x07c0 |
a327967e |
17 | vdup.16 q15, r3 |
69f0df9c |
18 | subs r2, r2, #64 |
19 | blt btr16_end64 |
a327967e |
20 | 0: |
21 | vldmia r1!, {q0-q3} |
d352cde2 |
22 | vshl.u16 q4, q0, #11 |
23 | vshl.u16 q5, q1, #11 |
24 | vshl.u16 q6, q2, #11 |
25 | vshl.u16 q7, q3, #11 |
26 | vsri.u16 q4, q0, #10 |
27 | vsri.u16 q5, q1, #10 |
28 | vsri.u16 q6, q2, #10 |
29 | vsri.u16 q7, q3, #10 |
a327967e |
30 | vshl.u16 q0, q0, #1 |
31 | vshl.u16 q1, q1, #1 |
32 | vshl.u16 q2, q2, #1 |
33 | vshl.u16 q3, q3, #1 |
d352cde2 |
34 | vbit q4, q0, q15 |
35 | vbit q5, q1, q15 |
36 | vbit q6, q2, q15 |
37 | vbit q7, q3, q15 |
38 | vstmia r0!, {q4-q7} |
39 | subs r2, r2, #64 |
40 | bge 0b |
41 | |
69f0df9c |
42 | btr16_end64: |
d352cde2 |
43 | adds r2, r2, #64 |
44 | bxeq lr |
69f0df9c |
45 | subs r2, r2, #16 |
46 | blt btr16_end16 |
d352cde2 |
47 | |
69f0df9c |
48 | @ handle the remainder (reasonably rare) |
d352cde2 |
49 | 0: |
69f0df9c |
50 | vld1.16 {q0}, [r1]! |
d352cde2 |
51 | vshl.u16 q1, q0, #11 |
52 | vshl.u16 q2, q0, #1 |
53 | vsri.u16 q1, q0, #10 |
54 | vbit q1, q2, q15 |
55 | subs r2, r2, #16 |
69f0df9c |
56 | vst1.16 {q1}, [r0]! |
57 | bge 0b |
58 | |
59 | btr16_end16: |
60 | adds r2, r2, #16 |
61 | bxeq lr |
62 | subs r2, r2, #8 |
63 | bxlt lr |
a327967e |
64 | |
69f0df9c |
65 | @ very rare |
66 | vld1.16 d0, [r1]! |
67 | vshl.u16 d1, d0, #11 |
68 | vshl.u16 d2, d0, #1 |
69 | vsri.u16 d1, d0, #10 |
70 | vbit d1, d2, d30 |
71 | vst1.16 d1, [r0]! |
a327967e |
72 | bx lr |
73 | |
1972732a |
74 | |
75 | .global bgr888_to_rgb888 |
76 | bgr888_to_rgb888: |
77 | @ r2 /= 48 |
78 | mov r2, r2, lsr #4 |
79 | movw r3, #0x5556 |
80 | movt r3, #0x5555 |
81 | umull r12,r2, r3, r2 |
82 | 0: |
83 | vld3.8 {d0-d2}, [r1, :64]! |
84 | vld3.8 {d3-d5}, [r1, :64]! |
85 | vswp d0, d2 |
86 | vswp d3, d5 |
87 | vst3.8 {d0-d2}, [r0, :64]! |
88 | vst3.8 {d3-d5}, [r0, :64]! |
89 | subs r2, r2, #1 |
90 | bne 0b |
91 | |
92 | bx lr |
93 | |
94 | |
f3a63e25 |
95 | .global bgr888_to_rgb565 |
96 | bgr888_to_rgb565: |
97 | @ r2 /= 48 |
98 | mov r2, r2, lsr #4 |
99 | movw r3, #0x5556 |
100 | movt r3, #0x5555 |
101 | umull r12,r2, r3, r2 |
102 | |
103 | mov r3, #0x07e0 |
104 | vdup.16 q15, r3 |
105 | 0: |
106 | vld3.8 {d1-d3}, [r1, :64]! |
107 | vld3.8 {d5-d7}, [r1, :64]! |
108 | |
109 | vshll.u8 q8, d2, #3 @ g |
110 | vshll.u8 q9, d6, #3 |
111 | vshr.u8 d0, d3, #3 @ b |
112 | vshr.u8 d4, d7, #3 |
113 | vzip.8 d0, d1 @ rb |
114 | vzip.8 d4, d5 |
115 | vbit q0, q8, q15 |
116 | vbit q2, q9, q15 |
117 | |
118 | vstmia r0!, {d0,d1} |
119 | vstmia r0!, {d4,d5} |
120 | subs r2, r2, #1 |
121 | bne 0b |
122 | |
123 | bx lr |
124 | |
125 | |
a327967e |
126 | @ vim:filetype=armasm |