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0636f4e685
I was looking at a log, and noticed the following lines: I [pulseaudio] svolume_mmx.c: Initialising MMX optimized functions. I [pulseaudio] remap_mmx.c: Initialising MMX optimized remappers. I [pulseaudio] svolume_sse.c: Initialising SSE2 optimized functions. I [pulseaudio] remap_sse.c: Initialising SSE2 optimized remappers. I [pulseaudio] sconv_sse.c: Initialising SSE2 optimized conversions. It seemed odd that some messages were somewhat precise in what functionality was initialized, while the svolume messages told me that they had initialized just "functions". So I made the svolume log messages more precise to match the sconv and remap messages.
344 lines
14 KiB
C
344 lines
14 KiB
C
/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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Copyright 2009 Wim Taymans <wim.taymans@collabora.co.uk>
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <pulse/rtclock.h>
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#include <pulsecore/random.h>
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#include <pulsecore/macro.h>
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#include <pulsecore/endianmacros.h>
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#include "cpu-x86.h"
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#include "sample-util.h"
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#if defined (__i386__) || defined (__amd64__)
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/* in s: 2 int16_t samples
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* in v: 2 int32_t volumes, fixed point 16:16
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* out s: contains scaled and clamped int16_t samples.
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*
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* We calculate the high 32 bits of a 32x16 multiply which we then
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* clamp to 16 bits. The calulcation is:
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*
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* vl = (v & 0xffff)
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* vh = (v >> 16)
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* s = ((s * vl) >> 16) + (s * vh);
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*
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* For the first multiply we have to do a sign correction as we need to
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* multiply a signed int with an unsigned int. Hacker's delight 8-3 gives a
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* simple formula to correct the sign of the high word after the signed
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* multiply.
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*/
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#define VOLUME_32x16(s,v) /* .. | vh | vl | */ \
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" pxor %%mm4, %%mm4 \n\t" /* .. | 0 | 0 | */ \
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" punpcklwd %%mm4, "#s" \n\t" /* .. | 0 | p0 | */ \
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" pcmpgtw "#v", %%mm4 \n\t" /* .. | 0 | s(vl) | */ \
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" pand "#s", %%mm4 \n\t" /* .. | 0 | (p0) | (vl >> 15) & p */ \
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" movq "#s", %%mm5 \n\t" \
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" pmulhw "#v", "#s" \n\t" /* .. | 0 | vl*p0 | */ \
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" paddw %%mm4, "#s" \n\t" /* .. | 0 | vl*p0 | + sign correct */ \
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" pslld $16, "#s" \n\t" /* .. | vl*p0 | 0 | */ \
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" psrld $16, "#v" \n\t" /* .. | 0 | vh | */ \
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" psrad $16, "#s" \n\t" /* .. | vl*p0 | sign extend */ \
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" pmaddwd %%mm5, "#v" \n\t" /* .. | p0 * vh | */ \
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" paddd "#s", "#v" \n\t" /* .. | p0 * v0 | */ \
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" packssdw "#v", "#v" \n\t" /* .. | p1*v1 | p0*v0 | */
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/* approximately advances %3 = (%3 + a) % b. This function requires that
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* a <= b. */
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#define MOD_ADD(a,b) \
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" add "#a", %3 \n\t" \
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" mov %3, %4 \n\t" \
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" sub "#b", %4 \n\t" \
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" cmovae %4, %3 \n\t"
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/* swap 16 bits */
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#define SWAP_16(s) \
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" movq "#s", %%mm4 \n\t" /* .. | h l | */ \
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" psrlw $8, %%mm4 \n\t" /* .. | 0 h | */ \
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" psllw $8, "#s" \n\t" /* .. | l 0 | */ \
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" por %%mm4, "#s" \n\t" /* .. | l h | */
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/* swap 2 registers 16 bits for better pairing */
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#define SWAP_16_2(s1,s2) \
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" movq "#s1", %%mm4 \n\t" /* .. | h l | */ \
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" movq "#s2", %%mm5 \n\t" \
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" psrlw $8, %%mm4 \n\t" /* .. | 0 h | */ \
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" psrlw $8, %%mm5 \n\t" \
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" psllw $8, "#s1" \n\t" /* .. | l 0 | */ \
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" psllw $8, "#s2" \n\t" \
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" por %%mm4, "#s1" \n\t" /* .. | l h | */ \
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" por %%mm5, "#s2" \n\t"
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static void pa_volume_s16ne_mmx(int16_t *samples, int32_t *volumes, unsigned channels, unsigned length) {
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pa_reg_x86 channel, temp;
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/* Channels must be at least 4, and always a multiple of the original number.
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* This is also the max amount we overread the volume array, which should
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* have enough padding. */
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channels = channels == 3 ? 6 : PA_MAX (4U, channels);
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__asm__ __volatile__ (
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" xor %3, %3 \n\t"
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" sar $1, %2 \n\t" /* length /= sizeof (int16_t) */
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" test $1, %2 \n\t" /* check for odd samples */
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" je 2f \n\t"
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" movd (%1, %3, 4), %%mm0 \n\t" /* | v0h | v0l | */
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" movw (%0), %w4 \n\t" /* .. | p0 | */
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" movd %4, %%mm1 \n\t"
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VOLUME_32x16 (%%mm1, %%mm0)
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" movd %%mm0, %4 \n\t" /* .. | p0*v0 | */
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" movw %w4, (%0) \n\t"
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" add $2, %0 \n\t"
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MOD_ADD ($1, %5)
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"2: \n\t"
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" sar $1, %2 \n\t" /* prepare for processing 2 samples at a time */
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" test $1, %2 \n\t" /* check for odd samples */
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" je 4f \n\t"
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"3: \n\t" /* do samples in groups of 2 */
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" movq (%1, %3, 4), %%mm0 \n\t" /* | v1h | v1l | v0h | v0l | */
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" movd (%0), %%mm1 \n\t" /* .. | p1 | p0 | */
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VOLUME_32x16 (%%mm1, %%mm0)
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" movd %%mm0, (%0) \n\t" /* .. | p1*v1 | p0*v0 | */
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" add $4, %0 \n\t"
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MOD_ADD ($2, %5)
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"4: \n\t"
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" sar $1, %2 \n\t" /* prepare for processing 4 samples at a time */
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" cmp $0, %2 \n\t"
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" je 6f \n\t"
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"5: \n\t" /* do samples in groups of 4 */
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" movq (%1, %3, 4), %%mm0 \n\t" /* | v1h | v1l | v0h | v0l | */
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" movq 8(%1, %3, 4), %%mm2 \n\t" /* | v3h | v3l | v2h | v2l | */
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" movd (%0), %%mm1 \n\t" /* .. | p1 | p0 | */
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" movd 4(%0), %%mm3 \n\t" /* .. | p3 | p2 | */
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VOLUME_32x16 (%%mm1, %%mm0)
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VOLUME_32x16 (%%mm3, %%mm2)
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" movd %%mm0, (%0) \n\t" /* .. | p1*v1 | p0*v0 | */
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" movd %%mm2, 4(%0) \n\t" /* .. | p3*v3 | p2*v2 | */
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" add $8, %0 \n\t"
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MOD_ADD ($4, %5)
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" dec %2 \n\t"
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" jne 5b \n\t"
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"6: \n\t"
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" emms \n\t"
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: "+r" (samples), "+r" (volumes), "+r" (length), "=D" (channel), "=&r" (temp)
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#if defined (__i386__)
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: "m" ((pa_reg_x86)channels)
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#else
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: "r" ((pa_reg_x86)channels)
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#endif
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: "cc"
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);
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}
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static void pa_volume_s16re_mmx(int16_t *samples, int32_t *volumes, unsigned channels, unsigned length) {
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pa_reg_x86 channel, temp;
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/* Channels must be at least 4, and always a multiple of the original number.
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* This is also the max amount we overread the volume array, which should
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* have enough padding. */
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channels = channels == 3 ? 6 : PA_MAX (4U, channels);
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__asm__ __volatile__ (
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" xor %3, %3 \n\t"
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" sar $1, %2 \n\t" /* length /= sizeof (int16_t) */
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" pcmpeqw %%mm6, %%mm6 \n\t" /* .. | ffff | ffff | */
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" pcmpeqw %%mm7, %%mm7 \n\t" /* .. | ffff | ffff | */
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" pslld $16, %%mm6 \n\t" /* .. | ffff | 0 | */
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" psrld $31, %%mm7 \n\t" /* .. | 0 | 1 | */
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" test $1, %2 \n\t" /* check for odd samples */
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" je 2f \n\t"
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" movd (%1, %3, 4), %%mm0 \n\t" /* | v0h | v0l | */
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" movw (%0), %w4 \n\t" /* .. | p0 | */
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" rorw $8, %w4 \n\t"
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" movd %4, %%mm1 \n\t"
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VOLUME_32x16 (%%mm1, %%mm0)
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" movd %%mm0, %4 \n\t" /* .. | p0*v0 | */
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" rorw $8, %w4 \n\t"
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" movw %w4, (%0) \n\t"
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" add $2, %0 \n\t"
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MOD_ADD ($1, %5)
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"2: \n\t"
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" sar $1, %2 \n\t" /* prepare for processing 2 samples at a time */
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" test $1, %2 \n\t" /* check for odd samples */
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" je 4f \n\t"
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"3: \n\t" /* do samples in groups of 2 */
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" movq (%1, %3, 4), %%mm0 \n\t" /* | v1h | v1l | v0h | v0l | */
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" movd (%0), %%mm1 \n\t" /* .. | p1 | p0 | */
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SWAP_16 (%%mm1)
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VOLUME_32x16 (%%mm1, %%mm0)
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SWAP_16 (%%mm0)
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" movd %%mm0, (%0) \n\t" /* .. | p1*v1 | p0*v0 | */
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" add $4, %0 \n\t"
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MOD_ADD ($2, %5)
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"4: \n\t"
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" sar $1, %2 \n\t" /* prepare for processing 4 samples at a time */
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" cmp $0, %2 \n\t"
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" je 6f \n\t"
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"5: \n\t" /* do samples in groups of 4 */
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" movq (%1, %3, 4), %%mm0 \n\t" /* | v1h | v1l | v0h | v0l | */
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" movq 8(%1, %3, 4), %%mm2 \n\t" /* | v3h | v3l | v2h | v2l | */
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" movd (%0), %%mm1 \n\t" /* .. | p1 | p0 | */
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" movd 4(%0), %%mm3 \n\t" /* .. | p3 | p2 | */
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SWAP_16_2 (%%mm1, %%mm3)
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VOLUME_32x16 (%%mm1, %%mm0)
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VOLUME_32x16 (%%mm3, %%mm2)
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SWAP_16_2 (%%mm0, %%mm2)
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" movd %%mm0, (%0) \n\t" /* .. | p1*v1 | p0*v0 | */
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" movd %%mm2, 4(%0) \n\t" /* .. | p3*v3 | p2*v2 | */
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" add $8, %0 \n\t"
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MOD_ADD ($4, %5)
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" dec %2 \n\t"
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" jne 5b \n\t"
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"6: \n\t"
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" emms \n\t"
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: "+r" (samples), "+r" (volumes), "+r" (length), "=D" (channel), "=&r" (temp)
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#if defined (__i386__)
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: "m" ((pa_reg_x86)channels)
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#else
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: "r" ((pa_reg_x86)channels)
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#endif
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: "cc"
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);
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}
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#undef RUN_TEST
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#ifdef RUN_TEST
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#define CHANNELS 2
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#define SAMPLES 1022
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#define TIMES 1000
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#define TIMES2 100
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#define PADDING 16
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static void run_test(void) {
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int16_t samples[SAMPLES];
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int16_t samples_ref[SAMPLES];
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int16_t samples_orig[SAMPLES];
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int32_t volumes[CHANNELS + PADDING];
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int i, j, padding;
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pa_do_volume_func_t func;
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pa_usec_t start, stop;
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int k;
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pa_usec_t min = INT_MAX, max = 0;
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double s1 = 0, s2 = 0;
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func = pa_get_volume_func(PA_SAMPLE_S16NE);
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printf("checking MMX %zd\n", sizeof(samples));
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pa_random(samples, sizeof(samples));
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/* for (i = 0; i < SAMPLES; i++)
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samples[i] = -1; */
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memcpy(samples_ref, samples, sizeof(samples));
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memcpy(samples_orig, samples, sizeof(samples));
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for (i = 0; i < CHANNELS; i++)
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volumes[i] = PA_CLAMP_VOLUME(rand() >> 1);
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/* volumes[i] = 0x0000ffff; */
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for (padding = 0; padding < PADDING; padding++, i++)
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volumes[i] = volumes[padding];
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func(samples_ref, volumes, CHANNELS, sizeof(samples));
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pa_volume_s16ne_mmx(samples, volumes, CHANNELS, sizeof(samples));
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for (i = 0; i < SAMPLES; i++) {
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if (samples[i] != samples_ref[i]) {
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printf("%d: %04x != %04x (%04x * %08x)\n", i, samples[i], samples_ref[i],
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samples_orig[i], volumes[i % CHANNELS]);
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}
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}
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for (k = 0; k < TIMES2; k++) {
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start = pa_rtclock_now();
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for (j = 0; j < TIMES; j++) {
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memcpy(samples, samples_orig, sizeof(samples));
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pa_volume_s16ne_mmx(samples, volumes, CHANNELS, sizeof(samples));
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}
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stop = pa_rtclock_now();
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if (min > (stop - start)) min = stop - start;
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if (max < (stop - start)) max = stop - start;
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s1 += stop - start;
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s2 += (stop - start) * (stop - start);
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}
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pa_log_info("MMX: %llu usec (min = %llu, max = %llu, stddev = %g).", (long long unsigned int)s1,
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(long long unsigned int)min, (long long unsigned int)max, sqrt(TIMES2 * s2 - s1 * s1) / TIMES2);
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min = INT_MAX; max = 0;
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s1 = s2 = 0;
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for (k = 0; k < TIMES2; k++) {
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start = pa_rtclock_now();
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for (j = 0; j < TIMES; j++) {
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memcpy(samples_ref, samples_orig, sizeof(samples));
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func(samples_ref, volumes, CHANNELS, sizeof(samples));
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}
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stop = pa_rtclock_now();
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if (min > (stop - start)) min = stop - start;
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if (max < (stop - start)) max = stop - start;
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s1 += stop - start;
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s2 += (stop - start) * (stop - start);
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}
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pa_log_info("ref: %llu usec (min = %llu, max = %llu, stddev = %g).", (long long unsigned int)s1,
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(long long unsigned int)min, (long long unsigned int)max, sqrt(TIMES2 * s2 - s1 * s1) / TIMES2);
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pa_assert_se(memcmp(samples_ref, samples, sizeof(samples)) == 0);
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}
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#endif
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#endif /* defined (__i386__) || defined (__amd64__) */
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void pa_volume_func_init_mmx(pa_cpu_x86_flag_t flags) {
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#if defined (__i386__) || defined (__amd64__)
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#ifdef RUN_TEST
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run_test();
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#endif
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if ((flags & PA_CPU_X86_MMX) && (flags & PA_CPU_X86_CMOV)) {
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pa_log_info("Initialising MMX optimized volume functions.");
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pa_set_volume_func(PA_SAMPLE_S16NE, (pa_do_volume_func_t) pa_volume_s16ne_mmx);
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pa_set_volume_func(PA_SAMPLE_S16RE, (pa_do_volume_func_t) pa_volume_s16re_mmx);
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}
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#endif /* defined (__i386__) || defined (__amd64__) */
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}
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