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 74static int channel_overread_table[8] = {8,8,8,12,8,10,12,14}; 75 76static 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 160static 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 254void 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