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1 | @ vim:filetype=armasm\r |
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2 | @ some color conversion and blitting routines\r |
3 | \r |
4 | @ (c) Copyright 2006, notaz\r |
5 | @ All Rights Reserved\r |
6 | \r |
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7 | @ vim:filetype=armasm\r |
cc68a136 |
8 | \r |
9 | @ Convert 0000bbb0 ggg0rrr0 0000bbb0 ggg0rrr0\r |
10 | @ to 00000000 rrr00000 ggg00000 bbb00000 ...\r |
11 | \r |
12 | @ lr = 0x00e000e0, out: r3=lower_pix, r2=higher_pix; trashes rin\r |
13 | @ if sh==2, r8=0x00404040 (sh!=0 destroys flags!)\r |
14 | .macro convRGB32_2 rin sh=0\r |
15 | and r2, lr, \rin, lsr #4 @ blue\r |
16 | and r3, \rin, lr\r |
17 | orr r2, r2, r3, lsl #8 @ g0b0g0b0\r |
18 | \r |
19 | mov r3, r2, lsl #16 @ g0b00000\r |
20 | and \rin,lr, \rin, ror #12 @ 00r000r0 (reversed)\r |
21 | orr r3, r3, \rin, lsr #16 @ g0b000r0\r |
22 | .if \sh == 1\r |
23 | mov r3, r3, ror #17 @ shadow mode\r |
24 | .elseif \sh == 2\r |
25 | adds r3, r3, #0x40000000 @ green\r |
26 | orrcs r3, r3, #0xe0000000\r |
27 | mov r3, r3, ror #8\r |
28 | adds r3, r3, #0x40000000\r |
29 | orrcs r3, r3, #0xe0000000\r |
30 | mov r3, r3, ror #16\r |
31 | adds r3, r3, #0x40000000\r |
32 | orrcs r3, r3, #0xe0000000\r |
33 | mov r3, r3, ror #24\r |
34 | .else\r |
35 | mov r3, r3, ror #16 @ r3=low\r |
36 | .endif\r |
37 | \r |
38 | orr r3, r3, r3, lsr #3\r |
39 | str r3, [r0], #4\r |
40 | \r |
41 | mov r2, r2, lsr #16\r |
42 | orr r2, r2, \rin, lsl #16\r |
43 | .if \sh == 1\r |
44 | mov r2, r2, lsr #1\r |
45 | .elseif \sh == 2\r |
46 | mov r2, r2, ror #8\r |
47 | adds r2, r2, #0x40000000 @ blue\r |
48 | orrcs r2, r2, #0xe0000000\r |
49 | mov r2, r2, ror #8\r |
50 | adds r2, r2, #0x40000000\r |
51 | orrcs r2, r2, #0xe0000000\r |
52 | mov r2, r2, ror #8\r |
53 | adds r2, r2, #0x40000000\r |
54 | orrcs r2, r2, #0xe0000000\r |
55 | mov r2, r2, ror #8\r |
56 | .endif\r |
57 | \r |
58 | orr r2, r2, r2, lsr #3\r |
59 | str r2, [r0], #4\r |
60 | .endm\r |
61 | \r |
62 | \r |
63 | .global vidConvCpyRGB32 @ void *to, void *from, int pixels\r |
64 | \r |
65 | vidConvCpyRGB32:\r |
66 | stmfd sp!, {r4-r7,lr}\r |
67 | \r |
68 | mov r12, r2, lsr #3 @ repeats\r |
69 | mov lr, #0x00e00000\r |
70 | orr lr, lr, #0x00e0\r |
71 | \r |
72 | .loopRGB32:\r |
73 | subs r12, r12, #1\r |
74 | \r |
75 | ldmia r1!, {r4-r7}\r |
76 | convRGB32_2 r4\r |
77 | convRGB32_2 r5\r |
78 | convRGB32_2 r6\r |
79 | convRGB32_2 r7\r |
80 | \r |
81 | bgt .loopRGB32\r |
82 | \r |
83 | ldmfd sp!, {r4-r7,lr}\r |
84 | bx lr\r |
85 | \r |
86 | \r |
87 | .global vidConvCpyRGB32sh @ void *to, void *from, int pixels\r |
88 | \r |
89 | vidConvCpyRGB32sh:\r |
90 | stmfd sp!, {r4-r7,lr}\r |
91 | \r |
92 | mov r12, r2, lsr #3 @ repeats\r |
93 | mov lr, #0x00e00000\r |
94 | orr lr, lr, #0x00e0\r |
95 | \r |
96 | .loopRGB32sh:\r |
97 | subs r12, r12, #1\r |
98 | \r |
99 | ldmia r1!, {r4-r7}\r |
100 | convRGB32_2 r4, 1\r |
101 | convRGB32_2 r5, 1\r |
102 | convRGB32_2 r6, 1\r |
103 | convRGB32_2 r7, 1\r |
104 | \r |
105 | bgt .loopRGB32sh\r |
106 | \r |
107 | ldmfd sp!, {r4-r7,lr}\r |
108 | bx lr\r |
109 | \r |
110 | \r |
111 | .global vidConvCpyRGB32hi @ void *to, void *from, int pixels\r |
112 | \r |
113 | vidConvCpyRGB32hi:\r |
114 | stmfd sp!, {r4-r7,lr}\r |
115 | \r |
116 | mov r12, r2, lsr #3 @ repeats\r |
117 | mov lr, #0x00e00000\r |
118 | orr lr, lr, #0x00e0\r |
119 | \r |
120 | .loopRGB32hi:\r |
121 | ldmia r1!, {r4-r7}\r |
122 | convRGB32_2 r4, 2\r |
123 | convRGB32_2 r5, 2\r |
124 | convRGB32_2 r6, 2\r |
125 | convRGB32_2 r7, 2\r |
126 | \r |
127 | subs r12, r12, #1\r |
128 | bgt .loopRGB32hi\r |
129 | \r |
130 | ldmfd sp!, {r4-r7,lr}\r |
131 | bx lr\r |
132 | \r |
133 | \r |
134 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
135 | \r |
136 | \r |
137 | @ mode2 blitter for 40 cols\r |
138 | .global vidCpyM2_40col @ void *dest, void *src\r |
139 | \r |
140 | vidCpyM2_40col:\r |
141 | stmfd sp!, {r4-r6,lr}\r |
142 | \r |
143 | mov r12, #224 @ lines\r |
144 | add r1, r1, #8\r |
145 | \r |
146 | vidCpyM2_40_loop_out:\r |
147 | mov r6, #10\r |
148 | vidCpyM2_40_loop:\r |
149 | subs r6, r6, #1\r |
150 | ldmia r1!, {r2-r5}\r |
151 | stmia r0!, {r2-r5}\r |
152 | ldmia r1!, {r2-r5}\r |
153 | stmia r0!, {r2-r5}\r |
154 | bne vidCpyM2_40_loop\r |
155 | subs r12,r12,#1\r |
156 | add r1, r1, #8\r |
157 | bne vidCpyM2_40_loop_out\r |
158 | \r |
159 | ldmfd sp!, {r4-r6,lr}\r |
160 | bx lr\r |
161 | \r |
162 | \r |
163 | @ mode2 blitter for 32 cols\r |
164 | .global vidCpyM2_32col @ void *dest, void *src\r |
165 | \r |
166 | vidCpyM2_32col:\r |
167 | stmfd sp!, {r4-r6,lr}\r |
168 | \r |
169 | mov r12, #224 @ lines\r |
170 | add r1, r1, #8\r |
171 | add r0, r0, #32\r |
172 | \r |
173 | vidCpyM2_32_loop_out:\r |
174 | mov r6, #8\r |
175 | vidCpyM2_32_loop:\r |
176 | subs r6, r6, #1\r |
177 | ldmia r1!, {r2-r5}\r |
178 | stmia r0!, {r2-r5}\r |
179 | ldmia r1!, {r2-r5}\r |
180 | stmia r0!, {r2-r5}\r |
181 | bne vidCpyM2_32_loop\r |
182 | subs r12,r12,#1\r |
183 | add r0, r0, #64\r |
184 | add r1, r1, #8+64\r |
185 | bne vidCpyM2_32_loop_out\r |
186 | \r |
187 | ldmfd sp!, {r4-r6,lr}\r |
188 | bx lr\r |
189 | \r |
190 | \r |
191 | @ mode2 blitter for 32 cols with no borders\r |
192 | .global vidCpyM2_32col_nobord @ void *dest, void *src\r |
193 | \r |
194 | vidCpyM2_32col_nobord:\r |
195 | stmfd sp!, {r4-r6,lr}\r |
196 | \r |
197 | mov r12, #224 @ lines\r |
198 | add r1, r1, #8\r |
199 | b vidCpyM2_32_loop_out\r |
200 | \r |
201 | \r |
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202 | .global spend_cycles @ c\r |
203 | \r |
204 | spend_cycles:\r |
205 | mov r0, r0, lsr #2 @ 4 cycles/iteration\r |
206 | sub r0, r0, #2 @ entry/exit/init\r |
207 | .sc_loop:\r |
208 | subs r0, r0, #1\r |
209 | bpl .sc_loop\r |
210 | \r |
211 | bx lr\r |
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212 | \r |
213 | \r |
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214 | .global flushcache\r |
215 | \r |
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216 | flushcache:\r |
217 | swi #0x9f0002\r |
218 | mov pc, lr\r |
219 | \r |