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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
@ ScummVM - Graphic Adventure Engine
@
@ ScummVM is the legal property of its developers, whose names
@ are too numerous to list here. Please refer to the COPYRIGHT
@ file distributed with this source distribution.
@
@ This program is free software@ you can redistribute it and/or
@ modify it under the terms of the GNU General Public License
@ as published by the Free Software Foundation@ either version 2
@ of the License, or (at your option) any later version.
@
@ This program is distributed in the hope that it will be useful,
@ but WITHOUT ANY WARRANTY@ without even the implied warranty of
@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
@ GNU General Public License for more details.
@
@ You should have received a copy of the GNU General Public License
@ along with this program@ if not, write to the Free Software
@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
@
@ @author Robin Watts (robin@wss.co.uk)
.text
.global scale2x_8_arm
.global scale2x_16_arm
.global scale2x_32_arm
@ r0 = dst0
@ r1 = dst1
@ r2 = src
@ r3 = src_prev
@ r4 = src_next
@ r5 = len
@ We hold: r10 B
@ r8 r14 r7 D E F
@ r12 H
scale2x_8_arm:
STMFD r13!,{r4-r5,r7-r8,r10-r11,r14}
LDR r4, [r13,#4*7]
LDR r5, [r13,#4*8]
LDRB r14,[r2], #1
CMP r3, #0 @ Set NE
@ Stall on Xscale
MOV r8, r14
B loop8
same8:
STRB r14,[r0], #1
STRB r14,[r0], #1
STRB r14,[r1], #1
STRB r14,[r1], #1
SUBS r5, r5, #1
MOV r8, r14
MOV r14,r7
BLT end8
loop8:
LDRNEB r7, [r3], #1 @ As long as we aren't on the last pixel
LDRB r10,[r2], #1
LDRB r12,[r4], #1
@ Stall on Xscale
CMP r7, r8
CMPNE r10,r12
BEQ same8
CMP r8, r10
STREQB r8, [r0], #1
STRNEB r14,[r0], #1
CMP r10,r7
STREQB r7, [r0], #1
STRNEB r14,[r0], #1
CMP r8, r12
STREQB r8, [r1], #1
STRNEB r14,[r1], #1
CMP r12,r7
STREQB r7, [r1], #1
STRNEB r14,[r1], #1
SUBS r5, r5, #1
MOV r8, r14
MOV r14,r7
BGE loop8
end8:
LDMFD r13!,{r4-r5,r7-r8,r10-r11,PC}
scale2x_16_arm:
STMFD r13!,{r4-r5,r7-r8,r10-r11,r14}
LDR r4, [r13,#4*7]
LDR r5, [r13,#4*8]
LDRH r14,[r3], #2
CMP r3, #0 @ Set NE
@ Stall on Xscale
MOV r8, r14
B loop16
same16:
STRH r14,[r0], #2
STRH r14,[r0], #2
STRH r14,[r1], #2
STRH r14,[r1], #2
SUBS r5, r5, #1
MOV r8, r14
MOV r14,r7
BLT end16
loop16:
LDRNEH r7, [r3], #2 @ As long as we aren't on the last pixel
LDRH r10,[r2], #2
LDRH r12,[r4], #2
@ Stall on Xscale
CMP r7, r8
CMPNE r10,r12
BEQ same16
CMP r8, r10
STREQH r8, [r0], #2
STRNEH r14,[r0], #2
CMP r10,r7
STREQH r7, [r0], #2
STRNEH r14,[r0], #2
CMP r8, r12
STREQH r8, [r1], #2
STRNEH r14,[r1], #2
CMP r12,r7
STREQH r7, [r1], #2
STRNEH r14,[r1], #2
SUBS r5, r5, #1
MOV r8, r14
MOV r14,r7
BGE loop16
end16:
LDMFD r13!,{r4-r5,r7-r8,r10-r11,PC}
scale2x_32_arm:
STMFD r13!,{r4-r5,r7-r8,r10-r11,r14}
LDR r4, [r13,#4*7]
LDR r5, [r13,#4*8]
LDR r14,[r3], #4
CMP r3, #0 @ Set NE
@ Stall on Xscale
MOV r8, r14
B loop32
same32:
STR r14,[r0], #4
STR r14,[r0], #4
STR r14,[r1], #4
STR r14,[r1], #4
SUBS r5, r5, #1
MOV r8, r14
MOV r14,r7
BLT end32
loop32:
LDRNE r7, [r3], #4 @ As long as we aren't on the last pixel
LDR r10,[r2], #4
LDR r12,[r4], #4
@ Stall on Xscale
CMP r7, r8
CMPNE r10,r12
BEQ same32
CMP r8, r10
STREQ r8, [r0], #4
STRNE r14,[r0], #4
CMP r10,r7
STREQ r7, [r0], #4
STRNE r14,[r0], #4
CMP r8, r12
STREQ r8, [r1], #4
STRNE r14,[r1], #4
CMP r12,r7
STREQ r7, [r1], #4
STRNE r14,[r1], #4
SUBS r5, r5, #1
MOV r8, r14
MOV r14,r7
BGE loop32
end32:
LDMFD r13!,{r4-r5,r7-r8,r10-r11,PC}
|
