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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, see <http://www.gnu.org/licenses/>.
19 ***/
20 
21 #ifdef HAVE_CONFIG_H
22 #include <config.h>
23 #endif
24 
25 #include <pulse/rtclock.h>
26 
27 #include <pulsecore/random.h>
28 #include <pulsecore/macro.h>
29 #include <pulsecore/endianmacros.h>
30 
31 #include "cpu-x86.h"
32 
33 #include "sample-util.h"
34 
35 #if (!defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) && defined (__i386__)) || defined (__amd64__)
36 
37 #define VOLUME_32x16(s,v)                  /* .. |   vh  |   vl  | */                   \
38       " pxor %%xmm4, %%xmm4          \n\t" /* .. |    0  |    0  | */                   \
39       " punpcklwd %%xmm4, "#s"       \n\t" /* .. |    0  |   p0  | */                   \
40       " pcmpgtw "#s", %%xmm4         \n\t" /* .. |    0  | s(p0) | */                   \
41       " pand "#v", %%xmm4            \n\t" /* .. |    0  |  (vl) | */                   \
42       " movdqa "#s", %%xmm5          \n\t"                                              \
43       " pmulhuw "#v", "#s"           \n\t" /* .. |    0  | vl*p0 | */                   \
44       " psubd %%xmm4, "#s"           \n\t" /* .. |    0  | vl*p0 | + sign correct */    \
45       " psrld $16, "#v"              \n\t" /* .. |    0  |   vh  | */                   \
46       " pmaddwd %%xmm5, "#v"         \n\t" /* .. |    p0 * vh    | */                   \
47       " paddd "#s", "#v"             \n\t" /* .. |    p0 * v0    | */                   \
48       " packssdw "#v", "#v"          \n\t" /* .. | p1*v1 | p0*v0 | */
49 
50 #define MOD_ADD(a,b) \
51       " add "#a", %3                 \n\t" /* channel += inc           */ \
52       " mov %3, %4                   \n\t"                                \
53       " sub "#b", %4                 \n\t" /* tmp = channel - channels */ \
54       " cmovae %4, %3                \n\t" /* if (tmp >= 0) channel = tmp  */
55 
56 /* swap 16 bits */
57 #define SWAP_16(s) \
58       " movdqa "#s", %%xmm4          \n\t" /* .. |  h  l |  */ \
59       " psrlw $8, %%xmm4             \n\t" /* .. |  0  h |  */ \
60       " psllw $8, "#s"               \n\t" /* .. |  l  0 |  */ \
61       " por %%xmm4, "#s"             \n\t" /* .. |  l  h |  */
62 
63 /* swap 2 registers 16 bits for better pairing */
64 #define SWAP_16_2(s1,s2) \
65       " movdqa "#s1", %%xmm4         \n\t" /* .. |  h  l |  */ \
66       " movdqa "#s2", %%xmm5         \n\t"                     \
67       " psrlw $8, %%xmm4             \n\t" /* .. |  0  h |  */ \
68       " psrlw $8, %%xmm5             \n\t"                     \
69       " psllw $8, "#s1"              \n\t" /* .. |  l  0 |  */ \
70       " psllw $8, "#s2"              \n\t"                     \
71       " por %%xmm4, "#s1"            \n\t" /* .. |  l  h |  */ \
72       " por %%xmm5, "#s2"            \n\t"
73 
74 static int channel_overread_table[8] = {8,8,8,12,8,10,12,14};
75 
pa_volume_s16ne_sse2(int16_t * samples,const int32_t * volumes,unsigned channels,unsigned length)76 static void pa_volume_s16ne_sse2(int16_t *samples, const int32_t *volumes, unsigned channels, unsigned length) {
77     pa_reg_x86 channel, temp;
78 
79     /* Channels must be at least 8 and always a multiple of the original number.
80      * This is also the max amount we overread the volume array, which should
81      * have enough padding. */
82     if (channels < 8)
83         channels = channel_overread_table[channels];
84 
85     __asm__ __volatile__ (
86         " xor %3, %3                    \n\t"
87         " sar $1, %2                    \n\t" /* length /= sizeof (int16_t) */
88 
89         " test $1, %2                   \n\t" /* check for odd samples */
90         " je 2f                         \n\t"
91 
92         " movd (%q1, %3, 4), %%xmm0     \n\t" /* |  v0h  |  v0l  | */
93         " movw (%0), %w4                \n\t" /*     ..  |   p0  | */
94         " movd %4, %%xmm1               \n\t"
95         VOLUME_32x16 (%%xmm1, %%xmm0)
96         " movd %%xmm0, %4               \n\t" /*     ..  | p0*v0 | */
97         " movw %w4, (%0)                \n\t"
98         " add $2, %0                    \n\t"
99         MOD_ADD ($1, %5)
100 
101         "2:                             \n\t"
102         " sar $1, %2                    \n\t" /* prepare for processing 2 samples at a time */
103         " test $1, %2                   \n\t"
104         " je 4f                         \n\t"
105 
106         "3:                             \n\t" /* do samples in groups of 2 */
107         " movq (%q1, %3, 4), %%xmm0     \n\t" /* |  v1h  |  v1l  |  v0h  |  v0l  | */
108         " movd (%0), %%xmm1             \n\t" /*              .. |   p1  |  p0   | */
109         VOLUME_32x16 (%%xmm1, %%xmm0)
110         " movd %%xmm0, (%0)             \n\t" /*              .. | p1*v1 | p0*v0 | */
111         " add $4, %0                    \n\t"
112         MOD_ADD ($2, %5)
113 
114         "4:                             \n\t"
115         " sar $1, %2                    \n\t" /* prepare for processing 4 samples at a time */
116         " test $1, %2                   \n\t"
117         " je 6f                         \n\t"
118 
119         /* FIXME, we can do aligned access of the volume values if we can guarantee
120          * that the array is 16 bytes aligned, we probably have to do the odd values
121          * after this then. */
122         "5:                             \n\t" /* do samples in groups of 4 */
123         " movdqu (%q1, %3, 4), %%xmm0   \n\t" /* |  v3h  |  v3l  ..  v0h  |  v0l  | */
124         " movq (%0), %%xmm1             \n\t" /*              .. |   p3  ..  p0   | */
125         VOLUME_32x16 (%%xmm1, %%xmm0)
126         " movq %%xmm0, (%0)             \n\t" /*              .. | p3*v3 .. p0*v0 | */
127         " add $8, %0                    \n\t"
128         MOD_ADD ($4, %5)
129 
130         "6:                             \n\t"
131         " sar $1, %2                    \n\t" /* prepare for processing 8 samples at a time */
132         " cmp $0, %2                    \n\t"
133         " je 8f                         \n\t"
134 
135         "7:                             \n\t" /* do samples in groups of 8 */
136         " movdqu (%q1, %3, 4), %%xmm0   \n\t" /* |  v3h  |  v3l  ..  v0h  |  v0l  | */
137         " movdqu 16(%q1, %3, 4), %%xmm2 \n\t" /* |  v7h  |  v7l  ..  v4h  |  v4l  | */
138         " movq (%0), %%xmm1             \n\t" /*              .. |   p3  ..  p0   | */
139         " movq 8(%0), %%xmm3            \n\t" /*              .. |   p7  ..  p4   | */
140         VOLUME_32x16 (%%xmm1, %%xmm0)
141         VOLUME_32x16 (%%xmm3, %%xmm2)
142         " movq %%xmm0, (%0)             \n\t" /*              .. | p3*v3 .. p0*v0 | */
143         " movq %%xmm2, 8(%0)            \n\t" /*              .. | p7*v7 .. p4*v4 | */
144         " add $16, %0                   \n\t"
145         MOD_ADD ($8, %5)
146         " dec %2                        \n\t"
147         " jne 7b                        \n\t"
148         "8:                             \n\t"
149 
150         : "+r" (samples), "+r" (volumes), "+r" (length), "=&D" (channel), "=&r" (temp)
151 #if defined (__i386__)
152         : "m" (channels)
153 #else
154         : "r" ((pa_reg_x86)channels)
155 #endif
156         : "cc"
157     );
158 }
159 
pa_volume_s16re_sse2(int16_t * samples,const int32_t * volumes,unsigned channels,unsigned length)160 static void pa_volume_s16re_sse2(int16_t *samples, const int32_t *volumes, unsigned channels, unsigned length) {
161     pa_reg_x86 channel, temp;
162 
163     /* Channels must be at least 8 and always a multiple of the original number.
164      * This is also the max amount we overread the volume array, which should
165      * have enough padding. */
166     if (channels < 8)
167         channels = channel_overread_table[channels];
168 
169     __asm__ __volatile__ (
170         " xor %3, %3                    \n\t"
171         " sar $1, %2                    \n\t" /* length /= sizeof (int16_t) */
172 
173         " test $1, %2                   \n\t" /* check for odd samples */
174         " je 2f                         \n\t"
175 
176         " movd (%q1, %3, 4), %%xmm0     \n\t" /* |  v0h  |  v0l  | */
177         " movw (%0), %w4                \n\t" /*     ..  |   p0  | */
178         " rorw $8, %w4                  \n\t"
179         " movd %4, %%xmm1               \n\t"
180         VOLUME_32x16 (%%xmm1, %%xmm0)
181         " movd %%xmm0, %4               \n\t" /*     ..  | p0*v0 | */
182         " rorw $8, %w4                  \n\t"
183         " movw %w4, (%0)                \n\t"
184         " add $2, %0                    \n\t"
185         MOD_ADD ($1, %5)
186 
187         "2:                             \n\t"
188         " sar $1, %2                    \n\t" /* prepare for processing 2 samples at a time */
189         " test $1, %2                   \n\t"
190         " je 4f                         \n\t"
191 
192         "3:                             \n\t" /* do samples in groups of 2 */
193         " movq (%q1, %3, 4), %%xmm0     \n\t" /* |  v1h  |  v1l  |  v0h  |  v0l  | */
194         " movd (%0), %%xmm1             \n\t" /*              .. |   p1  |  p0   | */
195         SWAP_16 (%%xmm1)
196         VOLUME_32x16 (%%xmm1, %%xmm0)
197         SWAP_16 (%%xmm0)
198         " movd %%xmm0, (%0)             \n\t" /*              .. | p1*v1 | p0*v0 | */
199         " add $4, %0                    \n\t"
200         MOD_ADD ($2, %5)
201 
202         "4:                             \n\t"
203         " sar $1, %2                    \n\t" /* prepare for processing 4 samples at a time */
204         " test $1, %2                   \n\t"
205         " je 6f                         \n\t"
206 
207         /* FIXME, we can do aligned access of the volume values if we can guarantee
208          * that the array is 16 bytes aligned, we probably have to do the odd values
209          * after this then. */
210         "5:                             \n\t" /* do samples in groups of 4 */
211         " movdqu (%q1, %3, 4), %%xmm0   \n\t" /* |  v3h  |  v3l  ..  v0h  |  v0l  | */
212         " movq (%0), %%xmm1             \n\t" /*              .. |   p3  ..  p0   | */
213         SWAP_16 (%%xmm1)
214         VOLUME_32x16 (%%xmm1, %%xmm0)
215         SWAP_16 (%%xmm0)
216         " movq %%xmm0, (%0)             \n\t" /*              .. | p3*v3 .. p0*v0 | */
217         " add $8, %0                    \n\t"
218         MOD_ADD ($4, %5)
219 
220         "6:                             \n\t"
221         " sar $1, %2                    \n\t" /* prepare for processing 8 samples at a time */
222         " cmp $0, %2                    \n\t"
223         " je 8f                         \n\t"
224 
225         "7:                             \n\t" /* do samples in groups of 8 */
226         " movdqu (%q1, %3, 4), %%xmm0   \n\t" /* |  v3h  |  v3l  ..  v0h  |  v0l  | */
227         " movdqu 16(%q1, %3, 4), %%xmm2 \n\t" /* |  v7h  |  v7l  ..  v4h  |  v4l  | */
228         " movq (%0), %%xmm1             \n\t" /*              .. |   p3  ..  p0   | */
229         " movq 8(%0), %%xmm3            \n\t" /*              .. |   p7  ..  p4   | */
230         SWAP_16_2 (%%xmm1, %%xmm3)
231         VOLUME_32x16 (%%xmm1, %%xmm0)
232         VOLUME_32x16 (%%xmm3, %%xmm2)
233         SWAP_16_2 (%%xmm0, %%xmm2)
234         " movq %%xmm0, (%0)             \n\t" /*              .. | p3*v3 .. p0*v0 | */
235         " movq %%xmm2, 8(%0)            \n\t" /*              .. | p7*v7 .. p4*v4 | */
236         " add $16, %0                   \n\t"
237         MOD_ADD ($8, %5)
238         " dec %2                        \n\t"
239         " jne 7b                        \n\t"
240         "8:                             \n\t"
241 
242         : "+r" (samples), "+r" (volumes), "+r" (length), "=&D" (channel), "=&r" (temp)
243 #if defined (__i386__)
244         : "m" (channels)
245 #else
246         : "r" ((pa_reg_x86)channels)
247 #endif
248         : "cc"
249     );
250 }
251 
252 #endif /* (!defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) && defined (__i386__)) || defined (__amd64__) */
253 
pa_volume_func_init_sse(pa_cpu_x86_flag_t flags)254 void pa_volume_func_init_sse(pa_cpu_x86_flag_t flags) {
255 #if (!defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) && defined (__i386__)) || defined (__amd64__)
256     if (flags & PA_CPU_X86_SSE2) {
257         pa_log_info("Initialising SSE2 optimized volume functions.");
258 
259         pa_set_volume_func(PA_SAMPLE_S16NE, (pa_do_volume_func_t) pa_volume_s16ne_sse2);
260         pa_set_volume_func(PA_SAMPLE_S16RE, (pa_do_volume_func_t) pa_volume_s16re_sse2);
261     }
262 #endif /* (!defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) && defined (__i386__)) || defined (__amd64__) */
263 }
264