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Fix up according to Coding Style
[pulseaudio-mirror.git] / src / pulsecore / svolume_mmx.c
blob263790d9e50ae8383df1a90d99f77b6da1d838e9
1 /***
2 This file is part of PulseAudio.
3
4 Copyright 2004-2006 Lennart Poettering
5 Copyright 2009 Wim Taymans <wim.taymans@collabora.co.uk>
6
7 PulseAudio is free software; you can redistribute it and/or modify
8 it under the terms of the GNU Lesser General Public License as published
9 by the Free Software Foundation; either version 2.1 of the License,
10 or (at your option) any later version.
11
12 PulseAudio is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
16
17 You should have received a copy of the GNU Lesser General Public License
18 along with PulseAudio; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20 USA.
21 ***/
22
23 #ifdef HAVE_CONFIG_H
24 #include <config.h>
25 #endif
26
27 #include <pulse/timeval.h>
28 #include <pulse/rtclock.h>
29
30 #include <pulsecore/random.h>
31 #include <pulsecore/macro.h>
32 #include <pulsecore/g711.h>
33 #include <pulsecore/core-util.h>
34
35 #include "cpu-x86.h"
36
37 #include "sample-util.h"
38 #include "endianmacros.h"
39
40 #if defined (__i386__) || defined (__amd64__)
41 /* in s: 2 int16_t samples
42 * in v: 2 int32_t volumes, fixed point 16:16
43 * out s: contains scaled and clamped int16_t samples.
44 *
45 * We calculate the high 32 bits of a 32x16 multiply which we then
46 * clamp to 16 bits. The calulcation is:
47 *
48 * vl = (v & 0xffff)
49 * vh = (v >> 16)
50 * s = ((s * vl) >> 16) + (s * vh);
51 *
52 * For the first multiply we have to do a sign correction as we need to
53 * multiply a signed int with an unsigned int. Hacker's delight 8-3 gives a
54 * simple formula to correct the sign of the high word after the signed
55 * multiply.
56 */
57 #define VOLUME_32x16(s,v) /* .. | vh | vl | */ \
58 " pxor %%mm4, %%mm4 \n\t" /* .. | 0 | 0 | */ \
59 " punpcklwd %%mm4, "#s" \n\t" /* .. | 0 | p0 | */ \
60 " pcmpgtw "#v", %%mm4 \n\t" /* .. | 0 | s(vl) | */ \
61 " pand "#s", %%mm4 \n\t" /* .. | 0 | (p0) | (vl >> 15) & p */ \
62 " movq "#s", %%mm5 \n\t" \
63 " pmulhw "#v", "#s" \n\t" /* .. | 0 | vl*p0 | */ \
64 " paddw %%mm4, "#s" \n\t" /* .. | 0 | vl*p0 | + sign correct */ \
65 " pslld $16, "#s" \n\t" /* .. | vl*p0 | 0 | */ \
66 " psrld $16, "#v" \n\t" /* .. | 0 | vh | */ \
67 " psrad $16, "#s" \n\t" /* .. | vl*p0 | sign extend */ \
68 " pmaddwd %%mm5, "#v" \n\t" /* .. | p0 * vh | */ \
69 " paddd "#s", "#v" \n\t" /* .. | p0 * v0 | */ \
70 " packssdw "#v", "#v" \n\t" /* .. | p1*v1 | p0*v0 | */
71
72 /* approximately advances %3 = (%3 + a) % b. This function requires that
73 * a <= b. */
74 #define MOD_ADD(a,b) \
75 " add "#a", %3 \n\t" \
76 " mov %3, %4 \n\t" \
77 " sub "#b", %4 \n\t" \
78 " cmovae %4, %3 \n\t"
79
80 /* swap 16 bits */
81 #define SWAP_16(s) \
82 " movq "#s", %%mm4 \n\t" /* .. | h l | */ \
83 " psrlw $8, %%mm4 \n\t" /* .. | 0 h | */ \
84 " psllw $8, "#s" \n\t" /* .. | l 0 | */ \
85 " por %%mm4, "#s" \n\t" /* .. | l h | */
86
87 /* swap 2 registers 16 bits for better pairing */
88 #define SWAP_16_2(s1,s2) \
89 " movq "#s1", %%mm4 \n\t" /* .. | h l | */ \
90 " movq "#s2", %%mm5 \n\t" \
91 " psrlw $8, %%mm4 \n\t" /* .. | 0 h | */ \
92 " psrlw $8, %%mm5 \n\t" \
93 " psllw $8, "#s1" \n\t" /* .. | l 0 | */ \
94 " psllw $8, "#s2" \n\t" \
95 " por %%mm4, "#s1" \n\t" /* .. | l h | */ \
96 " por %%mm5, "#s2" \n\t"
97
98 static void pa_volume_s16ne_mmx(int16_t *samples, int32_t *volumes, unsigned channels, unsigned length) {
99 pa_reg_x86 channel, temp;
100
101 /* Channels must be at least 4, and always a multiple of the original number.
102 * This is also the max amount we overread the volume array, which should
103 * have enough padding. */
104 channels = channels == 3 ? 6 : PA_MAX (4U, channels);
105
106 __asm__ __volatile__ (
107 " xor %3, %3 \n\t"
108 " sar $1, %2 \n\t" /* length /= sizeof (int16_t) */
109
110 " test $1, %2 \n\t" /* check for odd samples */
111 " je 2f \n\t"
112
113 " movd (%1, %3, 4), %%mm0 \n\t" /* | v0h | v0l | */
114 " movw (%0), %w4 \n\t" /* .. | p0 | */
115 " movd %4, %%mm1 \n\t"
116 VOLUME_32x16 (%%mm1, %%mm0)
117 " movd %%mm0, %4 \n\t" /* .. | p0*v0 | */
118 " movw %w4, (%0) \n\t"
119 " add $2, %0 \n\t"
120 MOD_ADD ($1, %5)
121
122 "2: \n\t"
123 " sar $1, %2 \n\t" /* prepare for processing 2 samples at a time */
124 " test $1, %2 \n\t" /* check for odd samples */
125 " je 4f \n\t"
126
127 "3: \n\t" /* do samples in groups of 2 */
128 " movq (%1, %3, 4), %%mm0 \n\t" /* | v1h | v1l | v0h | v0l | */
129 " movd (%0), %%mm1 \n\t" /* .. | p1 | p0 | */
130 VOLUME_32x16 (%%mm1, %%mm0)
131 " movd %%mm0, (%0) \n\t" /* .. | p1*v1 | p0*v0 | */
132 " add $4, %0 \n\t"
133 MOD_ADD ($2, %5)
134
135 "4: \n\t"
136 " sar $1, %2 \n\t" /* prepare for processing 4 samples at a time */
137 " cmp $0, %2 \n\t"
138 " je 6f \n\t"
139
140 "5: \n\t" /* do samples in groups of 4 */
141 " movq (%1, %3, 4), %%mm0 \n\t" /* | v1h | v1l | v0h | v0l | */
142 " movq 8(%1, %3, 4), %%mm2 \n\t" /* | v3h | v3l | v2h | v2l | */
143 " movd (%0), %%mm1 \n\t" /* .. | p1 | p0 | */
144 " movd 4(%0), %%mm3 \n\t" /* .. | p3 | p2 | */
145 VOLUME_32x16 (%%mm1, %%mm0)
146 VOLUME_32x16 (%%mm3, %%mm2)
147 " movd %%mm0, (%0) \n\t" /* .. | p1*v1 | p0*v0 | */
148 " movd %%mm2, 4(%0) \n\t" /* .. | p3*v3 | p2*v2 | */
149 " add $8, %0 \n\t"
150 MOD_ADD ($4, %5)
151 " dec %2 \n\t"
152 " jne 5b \n\t"
153
154 "6: \n\t"
155 " emms \n\t"
156
157 : "+r" (samples), "+r" (volumes), "+r" (length), "=D" ((pa_reg_x86)channel), "=&r" (temp)
158 : "rm" ((pa_reg_x86)channels)
159 : "cc"
160 );
161 }
162
163 static void pa_volume_s16re_mmx(int16_t *samples, int32_t *volumes, unsigned channels, unsigned length) {
164 pa_reg_x86 channel, temp;
165
166 /* Channels must be at least 4, and always a multiple of the original number.
167 * This is also the max amount we overread the volume array, which should
168 * have enough padding. */
169 channels = channels == 3 ? 6 : PA_MAX (4U, channels);
170
171 __asm__ __volatile__ (
172 " xor %3, %3 \n\t"
173 " sar $1, %2 \n\t" /* length /= sizeof (int16_t) */
174 " pcmpeqw %%mm6, %%mm6 \n\t" /* .. | ffff | ffff | */
175 " pcmpeqw %%mm7, %%mm7 \n\t" /* .. | ffff | ffff | */
176 " pslld $16, %%mm6 \n\t" /* .. | ffff | 0 | */
177 " psrld $31, %%mm7 \n\t" /* .. | 0 | 1 | */
178
179 " test $1, %2 \n\t" /* check for odd samples */
180 " je 2f \n\t"
181
182 " movd (%1, %3, 4), %%mm0 \n\t" /* | v0h | v0l | */
183 " movw (%0), %w4 \n\t" /* .. | p0 | */
184 " rorw $8, %w4 \n\t"
185 " movd %4, %%mm1 \n\t"
186 VOLUME_32x16 (%%mm1, %%mm0)
187 " movd %%mm0, %4 \n\t" /* .. | p0*v0 | */
188 " rorw $8, %w4 \n\t"
189 " movw %w4, (%0) \n\t"
190 " add $2, %0 \n\t"
191 MOD_ADD ($1, %5)
192
193 "2: \n\t"
194 " sar $1, %2 \n\t" /* prepare for processing 2 samples at a time */
195 " test $1, %2 \n\t" /* check for odd samples */
196 " je 4f \n\t"
197
198 "3: \n\t" /* do samples in groups of 2 */
199 " movq (%1, %3, 4), %%mm0 \n\t" /* | v1h | v1l | v0h | v0l | */
200 " movd (%0), %%mm1 \n\t" /* .. | p1 | p0 | */
201 SWAP_16 (%%mm1)
202 VOLUME_32x16 (%%mm1, %%mm0)
203 SWAP_16 (%%mm0)
204 " movd %%mm0, (%0) \n\t" /* .. | p1*v1 | p0*v0 | */
205 " add $4, %0 \n\t"
206 MOD_ADD ($2, %5)
207
208 "4: \n\t"
209 " sar $1, %2 \n\t" /* prepare for processing 4 samples at a time */
210 " cmp $0, %2 \n\t"
211 " je 6f \n\t"
212
213 "5: \n\t" /* do samples in groups of 4 */
214 " movq (%1, %3, 4), %%mm0 \n\t" /* | v1h | v1l | v0h | v0l | */
215 " movq 8(%1, %3, 4), %%mm2 \n\t" /* | v3h | v3l | v2h | v2l | */
216 " movd (%0), %%mm1 \n\t" /* .. | p1 | p0 | */
217 " movd 4(%0), %%mm3 \n\t" /* .. | p3 | p2 | */
218 SWAP_16_2 (%%mm1, %%mm3)
219 VOLUME_32x16 (%%mm1, %%mm0)
220 VOLUME_32x16 (%%mm3, %%mm2)
221 SWAP_16_2 (%%mm0, %%mm2)
222 " movd %%mm0, (%0) \n\t" /* .. | p1*v1 | p0*v0 | */
223 " movd %%mm2, 4(%0) \n\t" /* .. | p3*v3 | p2*v2 | */
224 " add $8, %0 \n\t"
225 MOD_ADD ($4, %5)
226 " dec %2 \n\t"
227 " jne 5b \n\t"
228
229 "6: \n\t"
230 " emms \n\t"
231
232 : "+r" (samples), "+r" (volumes), "+r" (length), "=D" ((pa_reg_x86)channel), "=&r" (temp)
233 : "rm" ((pa_reg_x86)channels)
234 : "cc"
235 );
236 }
237
238 #undef RUN_TEST
239
240 #ifdef RUN_TEST
241 #define CHANNELS 2
242 #define SAMPLES 1022
243 #define TIMES 1000
244 #define PADDING 16
245
246 static void run_test(void) {
247 int16_t samples[SAMPLES];
248 int16_t samples_ref[SAMPLES];
249 int16_t samples_orig[SAMPLES];
250 int32_t volumes[CHANNELS + PADDING];
251 int i, j, padding;
252 pa_do_volume_func_t func;
253 pa_usec_t start, stop;
254
255 func = pa_get_volume_func(PA_SAMPLE_S16NE);
256
257 printf("checking MMX %zd\n", sizeof(samples));
258
259 pa_random(samples, sizeof(samples));
260 /* for (i = 0; i < SAMPLES; i++)
261 samples[i] = -1; */
262 memcpy(samples_ref, samples, sizeof(samples));
263 memcpy(samples_orig, samples, sizeof(samples));
264
265 for (i = 0; i < CHANNELS; i++)
266 volumes[i] = PA_CLAMP_VOLUME(rand() >> 1);
267 /* volumes[i] = 0x0000ffff; */
268 for (padding = 0; padding < PADDING; padding++, i++)
269 volumes[i] = volumes[padding];
270
271 func(samples_ref, volumes, CHANNELS, sizeof(samples));
272 pa_volume_s16ne_mmx(samples, volumes, CHANNELS, sizeof(samples));
273 for (i = 0; i < SAMPLES; i++) {
274 if (samples[i] != samples_ref[i]) {
275 printf("%d: %04x != %04x (%04x * %08x)\n", i, samples[i], samples_ref[i],
276 samples_orig[i], volumes[i % CHANNELS]);
277 }
278 }
279
280 start = pa_rtclock_now();
281 for (j = 0; j < TIMES; j++) {
282 memcpy(samples, samples_orig, sizeof(samples));
283 pa_volume_s16ne_mmx(samples, volumes, CHANNELS, sizeof(samples));
284 }
285 stop = pa_rtclock_now();
286 pa_log_info("MMX: %llu usec.", (long long unsigned int)(stop - start));
287
288 start = pa_rtclock_now();
289 for (j = 0; j < TIMES; j++) {
290 memcpy(samples_ref, samples_orig, sizeof(samples));
291 func(samples_ref, volumes, CHANNELS, sizeof(samples));
292 }
293 stop = pa_rtclock_now();
294 pa_log_info("ref: %llu usec.", (long long unsigned int)(stop - start));
295
296 pa_assert_se(memcmp(samples_ref, samples, sizeof(samples)) == 0);
297 }
298 #endif
299
300 #endif /* defined (__i386__) || defined (__amd64__) */
301
302
303 void pa_volume_func_init_mmx(pa_cpu_x86_flag_t flags) {
304 #if defined (__i386__) || defined (__amd64__)
305
306 #ifdef RUN_TEST
307 run_test();
308 #endif
309
310 if ((flags & PA_CPU_X86_MMX) && (flags & PA_CPU_X86_CMOV)) {
311 pa_log_info("Initialising MMX optimized functions.");
312
313 pa_set_volume_func(PA_SAMPLE_S16NE, (pa_do_volume_func_t) pa_volume_s16ne_mmx);
314 pa_set_volume_func(PA_SAMPLE_S16RE, (pa_do_volume_func_t) pa_volume_s16re_mmx);
315 }
316 #endif /* defined (__i386__) || defined (__amd64__) */
317 }
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