1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
/*
* (C) Gražvydas "notaz" Ignotas, 2011
*
* This work is licensed under the terms of any of these licenses
* (at your option):
* - GNU GPL, version 2 or later.
* - GNU LGPL, version 2.1 or later.
* See the COPYING file in the top-level directory.
*
* This code tries to make better use of pollux/arm926 store buffer
* by fusing words instead of using strhs.
*/
.text
.align 2
.macro lhw_str rl rt
lsl \rl, #16
lsr \rl, #16
orr \rl, \rt, lsl #16
str \rl, [r0], #4
.endm
.global blit320_640
blit320_640:
stmfd sp!, {r4-r8,lr}
mov r12, #40
0:
ldmia r1!, {r2-r8,lr}
lhw_str r2, r3
lhw_str r4, r5
lhw_str r6, r7
subs r12, #1
lhw_str r8, lr
bgt 0b
ldmfd sp!, {r4-r8,pc}
.global blit320_512
blit320_512:
stmfd sp!, {r4-r8,lr}
mov r12, #32
0:
ldmia r1!, {r2-r8,lr}
lsl r2, #16
lsr r2, #16
orr r2, r3, lsl #16
str r2, [r0], #4 @ 0,2
lsr r4, #16
lsr r3, #16
orr r3, r4, lsl #16
str r3, [r0], #4 @ 3,5
lsr r5, #16
orr r5, r6, lsl #16
str r5, [r0], #4 @ 7,8
lsr r8, #16
lsr lr, #16
str r7, [r0], #4 @ 10,11
orr r8, lr, lsl #16
subs r12, #1
str r8, [r0], #4 @ 13,15
bgt 0b
ldmfd sp!, {r4-r8,pc}
.macro unaligned_str rl rt
lsr \rl, #16
orr \rl, \rt, lsl #16
str \rl, [r0], #4
.endm
.global blit320_368
blit320_368:
stmfd sp!, {r4-r8,lr}
mov r12, #23
0:
ldmia r1!, {r2-r8,lr}
unaligned_str r2, r3 @ 1,2
unaligned_str r3, r4 @ 3,4
unaligned_str r4, r5 @ 5,6
subs r12, #1
stmia r0!, {r6-r8,lr} @ 8-15
bgt 0b
ldmfd sp!, {r4-r8,pc}
@ vim:filetype=armasm
|
