diff options
Diffstat (limited to 'apps/dsp_cf.S')
-rw-r--r-- | apps/dsp_cf.S | 611 |
1 files changed, 0 insertions, 611 deletions
diff --git a/apps/dsp_cf.S b/apps/dsp_cf.S deleted file mode 100644 index cda811a7d5..0000000000 --- a/apps/dsp_cf.S +++ /dev/null | |||
@@ -1,611 +0,0 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2006 Thom Johansen | ||
11 | * Portions Copyright (C) 2007 Michael Sevakis | ||
12 | * | ||
13 | * This program is free software; you can redistribute it and/or | ||
14 | * modify it under the terms of the GNU General Public License | ||
15 | * as published by the Free Software Foundation; either version 2 | ||
16 | * of the License, or (at your option) any later version. | ||
17 | * | ||
18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
19 | * KIND, either express or implied. | ||
20 | * | ||
21 | ****************************************************************************/ | ||
22 | |||
23 | /**************************************************************************** | ||
24 | * void dsp_apply_gain(int count, struct dsp_data *data, int32_t *buf[]) | ||
25 | */ | ||
26 | .section .text | ||
27 | .align 2 | ||
28 | .global dsp_apply_gain | ||
29 | dsp_apply_gain: | ||
30 | lea.l -20(%sp), %sp | save registers | ||
31 | movem.l %d2-%d4/%a2-%a3, (%sp) | | ||
32 | movem.l 28(%sp), %a0-%a1 | %a0 = data, | ||
33 | | %a1 = buf | ||
34 | move.l 4(%a0), %d1 | %d1 = data->num_channels | ||
35 | move.l 32(%a0), %a0 | %a0 = data->gain (in s8.23) | ||
36 | 10: | channel loop | | ||
37 | move.l 24(%sp), %d0 | %d0 = count | ||
38 | move.l -4(%a1, %d1.l*4), %a2 | %a2 = s = buf[ch-1] | ||
39 | move.l %a2, %a3 | %a3 = d = s | ||
40 | move.l (%a2)+, %d2 | %d2 = *s++, | ||
41 | mac.l %a0, %d2, (%a2)+, %d2, %acc0 | %acc0 = S(n)*gain, load S(n+1) | ||
42 | subq.l #1, %d0 | --count > 0 ? : effectively n++ | ||
43 | ble.b 30f | loop done | no? finish up | ||
44 | 20: | loop | | ||
45 | move.l %accext01, %d4 | fetch S(n-1)[7:0] | ||
46 | movclr.l %acc0, %d3 | fetch S(n-1)[40:8] in %d5[31:0] | ||
47 | asl.l #8, %d3 | *s++ = (S(n-1)[40:8] << 8) | S(n-1)[7:0] | ||
48 | mac.l %a0, %d2, (%a2)+, %d2, %acc0 | %acc0 = S(n)*gain, load S(n+1) | ||
49 | move.b %d4, %d3 | | ||
50 | move.l %d3, (%a3)+ | | ||
51 | subq.l #1, %d0 | --count > 0 ? : effectively n++ | ||
52 | bgt.b 20b | loop | yes? do more samples | ||
53 | 30: | loop done | | ||
54 | move.l %accext01, %d4 | fetch S(n-1)[7:0] | ||
55 | movclr.l %acc0, %d3 | fetch S(n-1)[40:8] in %d5[31:0] | ||
56 | asl.l #8, %d3 | *s = (S(n-1)[40:8] << 8) | S(n-1)[7:0] | ||
57 | move.b %d4, %d3 | | ||
58 | move.l %d3, (%a3) | | ||
59 | subq.l #1, %d1 | next channel | ||
60 | bgt.b 10b | channel loop | | ||
61 | movem.l (%sp), %d2-%d4/%a2-%a3 | restore registers | ||
62 | lea.l 20(%sp), %sp | cleanup stack | ||
63 | rts | | ||
64 | .size dsp_apply_gain,.-dsp_apply_gain | ||
65 | |||
66 | /**************************************************************************** | ||
67 | * void apply_crossfeed(int count, int32_t *buf[]) | ||
68 | */ | ||
69 | .section .text | ||
70 | .align 2 | ||
71 | .global apply_crossfeed | ||
72 | apply_crossfeed: | ||
73 | lea.l -44(%sp), %sp | | ||
74 | movem.l %d2-%d7/%a2-%a6, (%sp) | save all regs | ||
75 | movem.l 48(%sp), %d7/%a4 | %d7 = count, %a4 = src | ||
76 | movem.l (%a4), %a4-%a5 | %a4 = src[0], %a5 = src[1] | ||
77 | lea.l crossfeed_data, %a1 | %a1 = &crossfeed_data | ||
78 | move.l (%a1)+, %d6 | %d6 = direct gain | ||
79 | movem.l 12(%a1), %d0-%d3 | fetch filter history samples | ||
80 | move.l 132(%a1), %a0 | fetch delay line address | ||
81 | movem.l (%a1), %a1-%a3 | load filter coefs | ||
82 | lea.l crossfeed_data+136, %a6 | %a6 = delay line wrap limit | ||
83 | bra.b 20f | loop start | go to loop start point | ||
84 | /* Register usage in loop: | ||
85 | * %a0 = delay_p, %a1..%a3 = b0, b1, a1 (filter coefs), | ||
86 | * %a4 = buf[0], %a5 = buf[1], | ||
87 | * %a6 = delay line pointer wrap limit, | ||
88 | * %d0..%d3 = history | ||
89 | * %d4..%d5 = temp. | ||
90 | * %d6 = direct gain, | ||
91 | * %d7 = count | ||
92 | */ | ||
93 | 10: | loop | | ||
94 | movclr.l %acc0, %d4 | write outputs | ||
95 | move.l %d4, (%a4)+ | . | ||
96 | movclr.l %acc1, %d5 | . | ||
97 | move.l %d5, (%a5)+ | . | ||
98 | 20: | loop start | | ||
99 | mac.l %a2, %d0, (%a0)+, %d0, %acc0 | %acc0 = b1*dl[n - 1], %d0 = dl[n] | ||
100 | mac.l %a1, %d0 , %acc0 | %acc0 += b0*dl[n] | ||
101 | mac.l %a3, %d1, (%a5), %d5, %acc0 | %acc0 += a1*y_r[n - 1], load R | ||
102 | mac.l %a2, %d2, (%a0)+, %d2, %acc1 | %acc1 = b1*dr[n - 1], %d2 = dr[n] | ||
103 | mac.l %a1, %d2 , %acc1 | %acc1 += b0*dr[n] | ||
104 | mac.l %a3, %d3, (%a4), %d4, %acc1 | %acc1 += a1*y_l[n - 1], load L | ||
105 | movem.l %d4-%d5, -8(%a0) | save left & right inputs to delay line | ||
106 | move.l %acc0, %d3 | get filtered delayed left sample (y_l[n]) | ||
107 | move.l %acc1, %d1 | get filtered delayed right sample (y_r[n]) | ||
108 | mac.l %d6, %d4, %acc0 | %acc0 += gain*x_l[n] | ||
109 | mac.l %d6, %d5, %acc1 | %acc1 += gain*x_r[n] | ||
110 | cmp.l %a6, %a0 | wrap %a0 if passed end | ||
111 | bhs.b 30f | wrap buffer | | ||
112 | .word 0x51fb | tpf.l | trap the buffer wrap | ||
113 | 30: | wrap buffer | ...fwd taken branches more costly | ||
114 | lea.l -104(%a0), %a0 | wrap it up | ||
115 | subq.l #1, %d7 | --count > 0 ? | ||
116 | bgt.b 10b | loop | yes? do more | ||
117 | movclr.l %acc0, %d4 | write last outputs | ||
118 | move.l %d4, (%a4) | . | ||
119 | movclr.l %acc1, %d5 | . | ||
120 | move.l %d5, (%a5) | . | ||
121 | lea.l crossfeed_data+16, %a1 | save data back to struct | ||
122 | movem.l %d0-%d3, (%a1) | ...history | ||
123 | move.l %a0, 120(%a1) | ...delay_p | ||
124 | movem.l (%sp), %d2-%d7/%a2-%a6 | restore all regs | ||
125 | lea.l 44(%sp), %sp | | ||
126 | rts | | ||
127 | .size apply_crossfeed,.-apply_crossfeed | ||
128 | |||
129 | /**************************************************************************** | ||
130 | * int dsp_downsample(int count, struct dsp_data *data, | ||
131 | * in32_t *src[], int32_t *dst[]) | ||
132 | */ | ||
133 | .section .text | ||
134 | .align 2 | ||
135 | .global dsp_downsample | ||
136 | dsp_downsample: | ||
137 | lea.l -40(%sp), %sp | save non-clobberables | ||
138 | movem.l %d2-%d7/%a2-%a5, (%sp) | | ||
139 | movem.l 44(%sp), %d2/%a0-%a2 | %d2 = count | ||
140 | | %a0 = data | ||
141 | | %a1 = src | ||
142 | | %a2 = dst | ||
143 | movem.l 4(%a0), %d3-%d4 | %d3 = ch = data->num_channels | ||
144 | | %d4 = delta = data->resample_data.delta | ||
145 | moveq.l #16, %d7 | %d7 = shift | ||
146 | 10: | channel loop | | ||
147 | move.l 12(%a0), %d5 | %d5 = phase = data->resample_data.phase | ||
148 | move.l -4(%a1, %d3.l*4), %a3 | %a3 = s = src[ch-1] | ||
149 | move.l -4(%a2, %d3.l*4), %a4 | %a4 = d = dst[ch-1] | ||
150 | lea.l 12(%a0, %d3.l*4), %a5 | %a5 = &data->resample_data.ast_sample[ch-1] | ||
151 | move.l (%a5), %d0 | %d0 = last = data->resample_data.last_sample[ch-1] | ||
152 | move.l -4(%a3, %d2.l*4), (%a5) | data->resample_data.last_sample[ch-1] = s[count-1] | ||
153 | move.l %d5, %d6 | %d6 = pos = phase >> 16 | ||
154 | lsr.l %d7, %d6 | | ||
155 | cmp.l %d2, %d6 | past end of samples? | ||
156 | bge.b 40f | skip resample loop| yes? skip loop | ||
157 | tst.l %d6 | need last sample of prev. frame? | ||
158 | bne.b 20f | resample loop | no? start main loop | ||
159 | move.l (%a3, %d6.l*4), %d1 | %d1 = s[pos] | ||
160 | bra.b 30f | resample start last | start with last (last in %d0) | ||
161 | 20: | resample loop | | ||
162 | lea.l -4(%a3, %d6.l*4), %a5 | load s[pos-1] and s[pos] | ||
163 | movem.l (%a5), %d0-%d1 | | ||
164 | 30: | resample start last | | ||
165 | sub.l %d0, %d1 | %d1 = diff = s[pos] - s[pos-1] | ||
166 | move.l %d0, %acc0 | %acc0 = previous sample | ||
167 | move.l %d5, %d0 | frac = (phase << 16) >> 1 | ||
168 | lsl.l %d7, %d0 | | ||
169 | lsr.l #1, %d0 | | ||
170 | mac.l %d0, %d1, %acc0 | %acc0 += frac * diff | ||
171 | add.l %d4, %d5 | phase += delta | ||
172 | move.l %d5, %d6 | pos = phase >> 16 | ||
173 | lsr.l %d7, %d6 | | ||
174 | movclr.l %acc0, %d0 | | ||
175 | move.l %d0, (%a4)+ | *d++ = %d0 | ||
176 | cmp.l %d2, %d6 | pos < count? | ||
177 | blt.b 20b | resample loop | yes? continue resampling | ||
178 | 40: | skip resample loop | | ||
179 | subq.l #1, %d3 | ch > 0? | ||
180 | bgt.b 10b | channel loop | yes? process next channel | ||
181 | lsl.l %d7, %d2 | wrap phase to start of next frame | ||
182 | sub.l %d2, %d5 | data->resample_data.phase = | ||
183 | move.l %d5, 12(%a0) | ... phase - (count << 16) | ||
184 | move.l %a4, %d0 | return d - d[0] | ||
185 | sub.l (%a2), %d0 | | ||
186 | asr.l #2, %d0 | convert bytes->samples | ||
187 | movem.l (%sp), %d2-%d7/%a2-%a5 | restore non-clobberables | ||
188 | lea.l 40(%sp), %sp | cleanup stack | ||
189 | rts | buh-bye | ||
190 | .size dsp_downsample,.-dsp_downsample | ||
191 | |||
192 | /**************************************************************************** | ||
193 | * int dsp_upsample(int count, struct dsp_data *dsp, | ||
194 | * const int32_t *src[], int32_t *dst[]) | ||
195 | */ | ||
196 | .section .text | ||
197 | .align 2 | ||
198 | .global dsp_upsample | ||
199 | dsp_upsample: | ||
200 | lea.l -40(%sp), %sp | save non-clobberables | ||
201 | movem.l %d2-%d7/%a2-%a5, (%sp) | | ||
202 | movem.l 44(%sp), %d2/%a0-%a2 | %d2 = count | ||
203 | | %a0 = data | ||
204 | | %a1 = src | ||
205 | | %a2 = dst | ||
206 | movem.l 4(%a0), %d3-%d4 | %d3 = ch = channels | ||
207 | | %d4 = delta = data->resample_data.delta | ||
208 | swap %d4 | swap delta to high word to use... | ||
209 | | ...carries to increment position | ||
210 | 10: | channel loop | | ||
211 | move.l 12(%a0), %d5 | %d5 = phase = data->resample_data.phase | ||
212 | move.l -4(%a1, %d3.l*4), %a3 | %a3 = s = src[ch-1] | ||
213 | lea.l 12(%a0, %d3.l*4), %a4 | %a4 = &data->resample_data.last_sample[ch-1] | ||
214 | lea.l -4(%a3, %d2.l*4), %a5 | %a5 = src_end = &src[count-1] | ||
215 | move.l (%a4), %d0 | %d0 = last = data->resample_data.last_sample[ch-1] | ||
216 | move.l (%a5), (%a4) | data->resample_data.last_sample[ch-1] = s[count-1] | ||
217 | move.l -4(%a2, %d3.l*4), %a4 | %a4 = d = dst[ch-1] | ||
218 | move.l (%a3)+, %d1 | fetch first sample - might throw this... | ||
219 | | ...away later but we'll be preincremented | ||
220 | move.l %d1, %d6 | save sample value | ||
221 | sub.l %d0, %d1 | %d1 = diff = s[0] - last | ||
222 | swap %d5 | swap phase to high word to use | ||
223 | | carries to increment position | ||
224 | move.l %d5, %d7 | %d7 = pos = phase >> 16 | ||
225 | clr.w %d5 | | ||
226 | eor.l %d5, %d7 | pos == 0? | ||
227 | beq.b 40f | loop start | yes? start loop | ||
228 | cmp.l %d2, %d7 | past end of samples? | ||
229 | bge.b 50f | skip resample loop| yes? go to next channel and collect info | ||
230 | lea.l (%a3, %d7.l*4), %a3 | %a3 = s = &s[pos+1] | ||
231 | movem.l -8(%a3), %d0-%d1 | %d0 = s[pos-1], %d1 = s[pos] | ||
232 | move.l %d1, %d6 | save sample value | ||
233 | sub.l %d0, %d1 | %d1 = diff = s[pos] - s[pos-1] | ||
234 | bra.b 40f | loop start | | ||
235 | 20: | next sample loop | | ||
236 | move.l %d6, %d0 | move previous sample to %d0 | ||
237 | move.l (%a3)+, %d1 | fetch next sample | ||
238 | move.l %d1, %d6 | save sample value | ||
239 | sub.l %d0, %d1 | %d1 = diff = s[pos] - s[pos-1] | ||
240 | 30: | same sample loop | | ||
241 | movclr.l %acc0, %d7 | %d7 = result | ||
242 | move.l %d7, (%a4)+ | *d++ = %d7 | ||
243 | 40: | loop start | | ||
244 | lsr.l #1, %d5 | make phase into frac | ||
245 | move.l %d0, %acc0 | %acc0 = s[pos-1] | ||
246 | mac.l %d1, %d5, %acc0 | %acc0 = diff * frac | ||
247 | lsl.l #1, %d5 | restore frac to phase | ||
248 | add.l %d4, %d5 | phase += delta | ||
249 | bcc.b 30b | same sample loop | load next values? | ||
250 | cmp.l %a5, %a3 | src <= src_end? | ||
251 | bls.b 20b | next sample loop | yes? continue resampling | ||
252 | movclr.l %acc0, %d7 | %d7 = result | ||
253 | move.l %d7, (%a4)+ | *d++ = %d7 | ||
254 | 50: | skip resample loop | | ||
255 | subq.l #1, %d3 | ch > 0? | ||
256 | bgt.b 10b | channel loop | yes? process next channel | ||
257 | swap %d5 | wrap phase to start of next frame | ||
258 | move.l %d5, 12(%a0) | ...and save in data->resample_data.phase | ||
259 | move.l %a4, %d0 | return d - d[0] | ||
260 | sub.l (%a2), %d0 | | ||
261 | movem.l (%sp), %d2-%d7/%a2-%a5 | restore non-clobberables | ||
262 | asr.l #2, %d0 | convert bytes->samples | ||
263 | lea.l 40(%sp), %sp | cleanup stack | ||
264 | rts | buh-bye | ||
265 | .size dsp_upsample,.-dsp_upsample | ||
266 | |||
267 | /**************************************************************************** | ||
268 | * void channels_process_sound_chan_mono(int count, int32_t *buf[]) | ||
269 | * | ||
270 | * Mix left and right channels 50/50 into a center channel. | ||
271 | */ | ||
272 | .section .text | ||
273 | .align 2 | ||
274 | .global channels_process_sound_chan_mono | ||
275 | channels_process_sound_chan_mono: | ||
276 | movem.l 4(%sp), %d0/%a0 | %d0 = count, %a0 = buf | ||
277 | lea.l -20(%sp), %sp | save registers | ||
278 | movem.l %d2-%d4/%a2-%a3, (%sp) | | ||
279 | movem.l (%a0), %a0-%a1 | get channel pointers | ||
280 | move.l %a0, %a2 | use separate dst pointers since read | ||
281 | move.l %a1, %a3 | pointers run one ahead of write | ||
282 | move.l #0x40000000, %d3 | %d3 = 0.5 | ||
283 | move.l (%a0)+, %d1 | prime the input registers | ||
284 | move.l (%a1)+, %d2 | | ||
285 | mac.l %d1, %d3, (%a0)+, %d1, %acc0 | | ||
286 | mac.l %d2, %d3, (%a1)+, %d2, %acc0 | | ||
287 | subq.l #1, %d0 | | ||
288 | ble.s 20f | loop done | | ||
289 | 10: | loop | | ||
290 | movclr.l %acc0, %d4 | L = R = l/2 + r/2 | ||
291 | mac.l %d1, %d3, (%a0)+, %d1, %acc0 | | ||
292 | mac.l %d2, %d3, (%a1)+, %d2, %acc0 | | ||
293 | move.l %d4, (%a2)+ | output to original buffer | ||
294 | move.l %d4, (%a3)+ | | ||
295 | subq.l #1, %d0 | | ||
296 | bgt.s 10b | loop | | ||
297 | 20: | loop done | | ||
298 | movclr.l %acc0, %d4 | output last sample | ||
299 | move.l %d4, (%a2) | | ||
300 | move.l %d4, (%a3) | | ||
301 | movem.l (%sp), %d2-%d4/%a2-%a3 | restore registers | ||
302 | lea.l 20(%sp), %sp | cleanup | ||
303 | rts | | ||
304 | .size channels_process_sound_chan_mono, \ | ||
305 | .-channels_process_sound_chan_mono | ||
306 | |||
307 | /**************************************************************************** | ||
308 | * void channels_process_sound_chan_custom(int count, int32_t *buf[]) | ||
309 | * | ||
310 | * Apply stereo width (narrowing/expanding) effect. | ||
311 | */ | ||
312 | .section .text | ||
313 | .align 2 | ||
314 | .global channels_process_sound_chan_custom | ||
315 | channels_process_sound_chan_custom: | ||
316 | movem.l 4(%sp), %d0/%a0 | %d0 = count, %a0 = buf | ||
317 | lea.l -28(%sp), %sp | save registers | ||
318 | movem.l %d2-%d6/%a2-%a3, (%sp) | | ||
319 | movem.l (%a0), %a0-%a1 | get channel pointers | ||
320 | move.l %a0, %a2 | use separate dst pointers since read | ||
321 | move.l %a1, %a3 | pointers run one ahead of write | ||
322 | move.l dsp_sw_gain, %d3 | load straight (mid) gain | ||
323 | move.l dsp_sw_cross, %d4 | load cross (side) gain | ||
324 | move.l (%a0)+, %d1 | prime the input registers | ||
325 | move.l (%a1)+, %d2 | | ||
326 | mac.l %d1, %d3 , %acc0 | L = l*gain + r*cross | ||
327 | mac.l %d1, %d4, (%a0)+, %d1, %acc1 | R = r*gain + l*cross | ||
328 | mac.l %d2, %d4 , %acc0 | | ||
329 | mac.l %d2, %d3, (%a1)+, %d2, %acc1 | | ||
330 | subq.l #1, %d0 | | ||
331 | ble.b 20f | loop done | | ||
332 | 10: | loop | | ||
333 | movclr.l %acc0, %d5 | | ||
334 | movclr.l %acc1, %d6 | | ||
335 | mac.l %d1, %d3 , %acc0 | L = l*gain + r*cross | ||
336 | mac.l %d1, %d4, (%a0)+, %d1, %acc1 | R = r*gain + l*cross | ||
337 | mac.l %d2, %d4 , %acc0 | | ||
338 | mac.l %d2, %d3, (%a1)+, %d2, %acc1 | | ||
339 | move.l %d5, (%a2)+ | | ||
340 | move.l %d6, (%a3)+ | | ||
341 | subq.l #1, %d0 | | ||
342 | bgt.s 10b | loop | | ||
343 | 20: | loop done | | ||
344 | movclr.l %acc0, %d5 | output last sample | ||
345 | movclr.l %acc1, %d6 | | ||
346 | move.l %d5, (%a2) | | ||
347 | move.l %d6, (%a3) | | ||
348 | movem.l (%sp), %d2-%d6/%a2-%a3 | restore registers | ||
349 | lea.l 28(%sp), %sp | cleanup | ||
350 | rts | | ||
351 | .size channels_process_sound_chan_custom, \ | ||
352 | .-channels_process_sound_chan_custom | ||
353 | |||
354 | /**************************************************************************** | ||
355 | * void channels_process_sound_chan_karaoke(int count, int32_t *buf[]) | ||
356 | * | ||
357 | * Separate channels into side channels. | ||
358 | */ | ||
359 | .section .text | ||
360 | .align 2 | ||
361 | .global channels_process_sound_chan_karaoke | ||
362 | channels_process_sound_chan_karaoke: | ||
363 | movem.l 4(%sp), %d0/%a0 | %d0 = count, %a0 = buf | ||
364 | lea.l -20(%sp), %sp | save registers | ||
365 | movem.l %d2-%d4/%a2-%a3, (%sp) | | ||
366 | movem.l (%a0), %a0-%a1 | get channel src pointers | ||
367 | move.l %a0, %a2 | use separate dst pointers since read | ||
368 | move.l %a1, %a3 | pointers run one ahead of write | ||
369 | move.l #0x40000000, %d3 | %d3 = 0.5 | ||
370 | move.l (%a0)+, %d1 | prime the input registers | ||
371 | move.l (%a1)+, %d2 | | ||
372 | mac.l %d1, %d3, (%a0)+, %d1, %acc0 | L = l/2 - r/2 | ||
373 | msac.l %d2, %d3, (%a1)+, %d2, %acc0 | | ||
374 | subq.l #1, %d0 | | ||
375 | ble.b 20f | loop done | | ||
376 | 10: | loop | | ||
377 | movclr.l %acc0, %d4 | | ||
378 | mac.l %d1, %d3, (%a0)+, %d1, %acc0 | L = l/2 - r/2 | ||
379 | msac.l %d2, %d3, (%a1)+, %d2, %acc0 | | ||
380 | move.l %d4, (%a2)+ | | ||
381 | neg.l %d4 | R = -L = -(l/2 - r/2) = r/2 - l/2 | ||
382 | move.l %d4, (%a3)+ | | ||
383 | subq.l #1, %d0 | | ||
384 | bgt.s 10b | loop | | ||
385 | 20: | loop done | | ||
386 | movclr.l %acc0, %d4 | output last sample | ||
387 | move.l %d4, (%a2) | | ||
388 | neg.l %d4 | R = -L = -(l/2 - r/2) = r/2 - l/2 | ||
389 | move.l %d4, (%a3) | | ||
390 | movem.l (%sp), %d2-%d4/%a2-%a3 | restore registers | ||
391 | lea.l 20(%sp), %sp | cleanup | ||
392 | rts | | ||
393 | .size channels_process_sound_chan_karaoke, \ | ||
394 | .-channels_process_sound_chan_karaoke | ||
395 | |||
396 | /**************************************************************************** | ||
397 | * void sample_output_stereo(int count, struct dsp_data *data, | ||
398 | * const int32_t *src[], int16_t *dst) | ||
399 | * | ||
400 | * Framework based on the ubiquitous Rockbox line transfer logic for | ||
401 | * Coldfire CPUs. | ||
402 | * | ||
403 | * Does emac clamping and scaling (which proved faster than the usual | ||
404 | * checks and branches - even single test clamping) and writes using | ||
405 | * line burst transfers. Also better than writing a single L-R pair per | ||
406 | * loop but a good deal more code. | ||
407 | * | ||
408 | * Attemping bursting during reads is rather futile since the source and | ||
409 | * destination alignments rarely agree and too much complication will | ||
410 | * slow us up. The parallel loads seem to do a bit better at least until | ||
411 | * a pcm buffer can always give line aligned chunk and then aligning the | ||
412 | * dest can then imply the source is aligned if the source buffers are. | ||
413 | * For now longword alignment is assumed of both the source and dest. | ||
414 | * | ||
415 | */ | ||
416 | .section .text | ||
417 | .align 2 | ||
418 | .global sample_output_stereo | ||
419 | sample_output_stereo: | ||
420 | lea.l -48(%sp), %sp | save registers | ||
421 | move.l %macsr, %d1 | do it now as at many lines will | ||
422 | movem.l %d1-%d7/%a2-%a6, (%sp) | be the far more common condition | ||
423 | move.l #0x80, %macsr | put emac unit in signed int mode | ||
424 | movem.l 52(%sp), %a0-%a2/%a4 | | ||
425 | lea.l (%a4, %a0.l*4), %a0 | %a0 = end address | ||
426 | move.l (%a1), %d1 | %a1 = multiplier: (1 << (16 - scale)) | ||
427 | sub.l #16, %d1 | | ||
428 | neg.l %d1 | | ||
429 | moveq.l #1, %d0 | | ||
430 | asl.l %d1, %d0 | | ||
431 | move.l %d0, %a1 | | ||
432 | move.l #0x8000, %a6 | %a6 = rounding term | ||
433 | movem.l (%a2), %a2-%a3 | get L/R channel pointers | ||
434 | moveq.l #28, %d0 | %d0 = second line bound | ||
435 | add.l %a4, %d0 | | ||
436 | and.l #0xfffffff0, %d0 | | ||
437 | cmp.l %a0, %d0 | at least a full line? | ||
438 | bhi.w 40f | long loop 1 start | no? do as trailing longwords | ||
439 | sub.l #16, %d0 | %d1 = first line bound | ||
440 | cmp.l %a4, %d0 | any leading longwords? | ||
441 | bls.b 20f | line loop start | no? start line loop | ||
442 | 10: | long loop 0 | | ||
443 | move.l (%a2)+, %d1 | read longword from L and R | ||
444 | move.l %a6, %acc0 | | ||
445 | move.l %acc0, %acc1 | | ||
446 | mac.l %d1, %a1, (%a3)+, %d2, %acc0 | shift L to high word | ||
447 | mac.l %d2, %a1, %acc1 | shift R to high word | ||
448 | movclr.l %acc0, %d1 | get possibly saturated results | ||
449 | movclr.l %acc1, %d2 | | ||
450 | swap %d2 | move R to low word | ||
451 | move.w %d2, %d1 | interleave MS 16 bits of each | ||
452 | move.l %d1, (%a4)+ | ...and write both | ||
453 | cmp.l %a4, %d0 | | ||
454 | bhi.b 10b | long loop 0 | | ||
455 | 20: | line loop start | | ||
456 | lea.l -12(%a0), %a5 | %a5 = at or just before last line bound | ||
457 | 30: | line loop | | ||
458 | move.l (%a3)+, %d4 | get next 4 R samples and scale | ||
459 | move.l %a6, %acc0 | | ||
460 | move.l %acc0, %acc1 | | ||
461 | move.l %acc1, %acc2 | | ||
462 | move.l %acc2, %acc3 | | ||
463 | mac.l %d4, %a1, (%a3)+, %d5, %acc0 | with saturation | ||
464 | mac.l %d5, %a1, (%a3)+, %d6, %acc1 | | ||
465 | mac.l %d6, %a1, (%a3)+, %d7, %acc2 | | ||
466 | mac.l %d7, %a1, (%a2)+, %d0, %acc3 | | ||
467 | lea.l 16(%a4), %a4 | increment dest here, mitigate stalls | ||
468 | movclr.l %acc0, %d4 | obtain R results | ||
469 | movclr.l %acc1, %d5 | | ||
470 | movclr.l %acc2, %d6 | | ||
471 | movclr.l %acc3, %d7 | | ||
472 | move.l %a6, %acc0 | | ||
473 | move.l %acc0, %acc1 | | ||
474 | move.l %acc1, %acc2 | | ||
475 | move.l %acc2, %acc3 | | ||
476 | mac.l %d0, %a1, (%a2)+, %d1, %acc0 | get next 4 L samples and scale | ||
477 | mac.l %d1, %a1, (%a2)+, %d2, %acc1 | with saturation | ||
478 | mac.l %d2, %a1, (%a2)+, %d3, %acc2 | | ||
479 | mac.l %d3, %a1 , %acc3 | | ||
480 | swap %d4 | a) interleave most significant... | ||
481 | swap %d5 | | ||
482 | swap %d6 | | ||
483 | swap %d7 | | ||
484 | movclr.l %acc0, %d0 | obtain L results | ||
485 | movclr.l %acc1, %d1 | | ||
486 | movclr.l %acc2, %d2 | | ||
487 | movclr.l %acc3, %d3 | | ||
488 | move.w %d4, %d0 | a) ... 16 bits of L and R | ||
489 | move.w %d5, %d1 | | ||
490 | move.w %d6, %d2 | | ||
491 | move.w %d7, %d3 | | ||
492 | movem.l %d0-%d3, -16(%a4) | write four stereo samples | ||
493 | cmp.l %a4, %a5 | | ||
494 | bhi.b 30b | line loop | | ||
495 | 40: | long loop 1 start | | ||
496 | cmp.l %a4, %a0 | any longwords left? | ||
497 | bls.b 60f | output end | no? stop | ||
498 | 50: | long loop 1 | | ||
499 | move.l (%a2)+, %d1 | handle trailing longwords | ||
500 | move.l %a6, %acc0 | | ||
501 | move.l %acc0, %acc1 | | ||
502 | mac.l %d1, %a1, (%a3)+, %d2, %acc0 | the same way as leading ones | ||
503 | mac.l %d2, %a1, %acc1 | | ||
504 | movclr.l %acc0, %d1 | | ||
505 | movclr.l %acc1, %d2 | | ||
506 | swap %d2 | | ||
507 | move.w %d2, %d1 | | ||
508 | move.l %d1, (%a4)+ | | ||
509 | cmp.l %a4, %a0 | | ||
510 | bhi.b 50b | long loop 1 | ||
511 | 60: | output end | | ||
512 | movem.l (%sp), %d1-%d7/%a2-%a6 | restore registers | ||
513 | move.l %d1, %macsr | | ||
514 | lea.l 48(%sp), %sp | cleanup | ||
515 | rts | | ||
516 | .size sample_output_stereo, .-sample_output_stereo | ||
517 | |||
518 | /**************************************************************************** | ||
519 | * void sample_output_mono(int count, struct dsp_data *data, | ||
520 | * const int32_t *src[], int16_t *dst) | ||
521 | * | ||
522 | * Same treatment as sample_output_stereo but for one channel. | ||
523 | */ | ||
524 | .section .text | ||
525 | .align 2 | ||
526 | .global sample_output_mono | ||
527 | sample_output_mono: | ||
528 | lea.l -32(%sp), %sp | save registers | ||
529 | move.l %macsr, %d1 | do it now as at many lines will | ||
530 | movem.l %d1-%d5/%a2-%a4, (%sp) | be the far more common condition | ||
531 | move.l #0x80, %macsr | put emac unit in signed int mode | ||
532 | movem.l 36(%sp), %a0-%a3 | | ||
533 | lea.l (%a3, %a0.l*4), %a0 | %a0 = end address | ||
534 | move.l (%a1), %d1 | %d5 = multiplier: (1 << (16 - scale)) | ||
535 | sub.l #16, %d1 | | ||
536 | neg.l %d1 | | ||
537 | moveq.l #1, %d5 | | ||
538 | asl.l %d1, %d5 | | ||
539 | move.l #0x8000, %a4 | %a4 = rounding term | ||
540 | movem.l (%a2), %a2 | get source channel pointer | ||
541 | moveq.l #28, %d0 | %d0 = second line bound | ||
542 | add.l %a3, %d0 | | ||
543 | and.l #0xfffffff0, %d0 | | ||
544 | cmp.l %a0, %d0 | at least a full line? | ||
545 | bhi.w 40f | long loop 1 start | no? do as trailing longwords | ||
546 | sub.l #16, %d0 | %d1 = first line bound | ||
547 | cmp.l %a3, %d0 | any leading longwords? | ||
548 | bls.b 20f | line loop start | no? start line loop | ||
549 | 10: | long loop 0 | | ||
550 | move.l (%a2)+, %d1 | read longword from L and R | ||
551 | move.l %a4, %acc0 | | ||
552 | mac.l %d1, %d5, %acc0 | shift L to high word | ||
553 | movclr.l %acc0, %d1 | get possibly saturated results | ||
554 | move.l %d1, %d2 | | ||
555 | swap %d2 | move R to low word | ||
556 | move.w %d2, %d1 | duplicate single channel into | ||
557 | move.l %d1, (%a3)+ | L and R | ||
558 | cmp.l %a3, %d0 | | ||
559 | bhi.b 10b | long loop 0 | | ||
560 | 20: | line loop start | | ||
561 | lea.l -12(%a0), %a1 | %a1 = at or just before last line bound | ||
562 | 30: | line loop | | ||
563 | move.l (%a2)+, %d0 | get next 4 L samples and scale | ||
564 | move.l %a4, %acc0 | | ||
565 | move.l %acc0, %acc1 | | ||
566 | move.l %acc1, %acc2 | | ||
567 | move.l %acc2, %acc3 | | ||
568 | mac.l %d0, %d5, (%a2)+, %d1, %acc0 | with saturation | ||
569 | mac.l %d1, %d5, (%a2)+, %d2, %acc1 | | ||
570 | mac.l %d2, %d5, (%a2)+, %d3, %acc2 | | ||
571 | mac.l %d3, %d5 , %acc3 | | ||
572 | lea.l 16(%a3), %a3 | increment dest here, mitigate stalls | ||
573 | movclr.l %acc0, %d0 | obtain results | ||
574 | movclr.l %acc1, %d1 | | ||
575 | movclr.l %acc2, %d2 | | ||
576 | movclr.l %acc3, %d3 | | ||
577 | move.l %d0, %d4 | duplicate single channel | ||
578 | swap %d4 | into L and R | ||
579 | move.w %d4, %d0 | | ||
580 | move.l %d1, %d4 | | ||
581 | swap %d4 | | ||
582 | move.w %d4, %d1 | | ||
583 | move.l %d2, %d4 | | ||
584 | swap %d4 | | ||
585 | move.w %d4, %d2 | | ||
586 | move.l %d3, %d4 | | ||
587 | swap %d4 | | ||
588 | move.w %d4, %d3 | | ||
589 | movem.l %d0-%d3, -16(%a3) | write four stereo samples | ||
590 | cmp.l %a3, %a1 | | ||
591 | bhi.b 30b | line loop | | ||
592 | 40: | long loop 1 start | | ||
593 | cmp.l %a3, %a0 | any longwords left? | ||
594 | bls.b 60f | output end | no? stop | ||
595 | 50: | loop loop 1 | | ||
596 | move.l (%a2)+, %d1 | handle trailing longwords | ||
597 | move.l %a4, %acc0 | | ||
598 | mac.l %d1, %d5, %acc0 | the same way as leading ones | ||
599 | movclr.l %acc0, %d1 | | ||
600 | move.l %d1, %d2 | | ||
601 | swap %d2 | | ||
602 | move.w %d2, %d1 | | ||
603 | move.l %d1, (%a3)+ | | ||
604 | cmp.l %a3, %a0 | | ||
605 | bhi.b 50b | long loop 1 | | ||
606 | 60: | output end | | ||
607 | movem.l (%sp), %d1-%d5/%a2-%a4 | restore registers | ||
608 | move.l %d1, %macsr | | ||
609 | lea.l 32(%sp), %sp | cleanup | ||
610 | rts | | ||
611 | .size sample_output_mono, .-sample_output_mono | ||