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e8fe04b2f6
For all our MMX/SSE code, we use a temporary channel variable, assigned to the DI register, which is zero'ed as the very first operation in the inline assembly code, before any other code is run. With GCC 9.1, while using -O2, the DI register is also used for the input operand. This is perfectly legal, but causes our code to become incorrect because the output operand that is assigned to DI is not explicitly marked as being clobbered before inputs are read. This change fixes the problem by adding an earlyclobber annotation (&) to the DI output argument.
263 lines
12 KiB
C
263 lines
12 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, see <http://www.gnu.org/licenses/>.
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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(__APPLE__) && !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) && defined (__i386__)) || defined (__amd64__)
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#define VOLUME_32x16(s,v) /* .. | vh | vl | */ \
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" pxor %%xmm4, %%xmm4 \n\t" /* .. | 0 | 0 | */ \
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" punpcklwd %%xmm4, "#s" \n\t" /* .. | 0 | p0 | */ \
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" pcmpgtw "#s", %%xmm4 \n\t" /* .. | 0 | s(p0) | */ \
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" pand "#v", %%xmm4 \n\t" /* .. | 0 | (vl) | */ \
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" movdqa "#s", %%xmm5 \n\t" \
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" pmulhuw "#v", "#s" \n\t" /* .. | 0 | vl*p0 | */ \
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" psubd %%xmm4, "#s" \n\t" /* .. | 0 | vl*p0 | + sign correct */ \
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" psrld $16, "#v" \n\t" /* .. | 0 | vh | */ \
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" pmaddwd %%xmm5, "#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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#define MOD_ADD(a,b) \
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" add "#a", %3 \n\t" /* channel += inc */ \
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" mov %3, %4 \n\t" \
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" sub "#b", %4 \n\t" /* tmp = channel - channels */ \
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" cmovae %4, %3 \n\t" /* if (tmp >= 0) channel = tmp */
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/* swap 16 bits */
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#define SWAP_16(s) \
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" movdqa "#s", %%xmm4 \n\t" /* .. | h l | */ \
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" psrlw $8, %%xmm4 \n\t" /* .. | 0 h | */ \
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" psllw $8, "#s" \n\t" /* .. | l 0 | */ \
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" por %%xmm4, "#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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" movdqa "#s1", %%xmm4 \n\t" /* .. | h l | */ \
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" movdqa "#s2", %%xmm5 \n\t" \
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" psrlw $8, %%xmm4 \n\t" /* .. | 0 h | */ \
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" psrlw $8, %%xmm5 \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 %%xmm4, "#s1" \n\t" /* .. | l h | */ \
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" por %%xmm5, "#s2" \n\t"
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static int channel_overread_table[8] = {8,8,8,12,8,10,12,14};
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static void pa_volume_s16ne_sse2(int16_t *samples, const 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 8 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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if (channels < 8)
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channels = channel_overread_table[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 (%q1, %3, 4), %%xmm0 \n\t" /* | v0h | v0l | */
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" movw (%0), %w4 \n\t" /* .. | p0 | */
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" movd %4, %%xmm1 \n\t"
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VOLUME_32x16 (%%xmm1, %%xmm0)
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" movd %%xmm0, %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"
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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 (%q1, %3, 4), %%xmm0 \n\t" /* | v1h | v1l | v0h | v0l | */
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" movd (%0), %%xmm1 \n\t" /* .. | p1 | p0 | */
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VOLUME_32x16 (%%xmm1, %%xmm0)
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" movd %%xmm0, (%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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" test $1, %2 \n\t"
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" je 6f \n\t"
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/* FIXME, we can do aligned access of the volume values if we can guarantee
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* that the array is 16 bytes aligned, we probably have to do the odd values
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* after this then. */
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"5: \n\t" /* do samples in groups of 4 */
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" movdqu (%q1, %3, 4), %%xmm0 \n\t" /* | v3h | v3l .. v0h | v0l | */
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" movq (%0), %%xmm1 \n\t" /* .. | p3 .. p0 | */
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VOLUME_32x16 (%%xmm1, %%xmm0)
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" movq %%xmm0, (%0) \n\t" /* .. | p3*v3 .. p0*v0 | */
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" add $8, %0 \n\t"
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MOD_ADD ($4, %5)
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"6: \n\t"
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" sar $1, %2 \n\t" /* prepare for processing 8 samples at a time */
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" cmp $0, %2 \n\t"
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" je 8f \n\t"
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"7: \n\t" /* do samples in groups of 8 */
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" movdqu (%q1, %3, 4), %%xmm0 \n\t" /* | v3h | v3l .. v0h | v0l | */
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" movdqu 16(%q1, %3, 4), %%xmm2 \n\t" /* | v7h | v7l .. v4h | v4l | */
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" movq (%0), %%xmm1 \n\t" /* .. | p3 .. p0 | */
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" movq 8(%0), %%xmm3 \n\t" /* .. | p7 .. p4 | */
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VOLUME_32x16 (%%xmm1, %%xmm0)
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VOLUME_32x16 (%%xmm3, %%xmm2)
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" movq %%xmm0, (%0) \n\t" /* .. | p3*v3 .. p0*v0 | */
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" movq %%xmm2, 8(%0) \n\t" /* .. | p7*v7 .. p4*v4 | */
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" add $16, %0 \n\t"
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MOD_ADD ($8, %5)
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" dec %2 \n\t"
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" jne 7b \n\t"
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"8: \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" (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_sse2(int16_t *samples, const 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 8 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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if (channels < 8)
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channels = channel_overread_table[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 (%q1, %3, 4), %%xmm0 \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, %%xmm1 \n\t"
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VOLUME_32x16 (%%xmm1, %%xmm0)
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" movd %%xmm0, %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"
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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 (%q1, %3, 4), %%xmm0 \n\t" /* | v1h | v1l | v0h | v0l | */
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" movd (%0), %%xmm1 \n\t" /* .. | p1 | p0 | */
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SWAP_16 (%%xmm1)
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VOLUME_32x16 (%%xmm1, %%xmm0)
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SWAP_16 (%%xmm0)
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" movd %%xmm0, (%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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" test $1, %2 \n\t"
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" je 6f \n\t"
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/* FIXME, we can do aligned access of the volume values if we can guarantee
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* that the array is 16 bytes aligned, we probably have to do the odd values
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* after this then. */
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"5: \n\t" /* do samples in groups of 4 */
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" movdqu (%q1, %3, 4), %%xmm0 \n\t" /* | v3h | v3l .. v0h | v0l | */
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" movq (%0), %%xmm1 \n\t" /* .. | p3 .. p0 | */
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SWAP_16 (%%xmm1)
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VOLUME_32x16 (%%xmm1, %%xmm0)
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SWAP_16 (%%xmm0)
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" movq %%xmm0, (%0) \n\t" /* .. | p3*v3 .. p0*v0 | */
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" add $8, %0 \n\t"
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MOD_ADD ($4, %5)
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"6: \n\t"
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" sar $1, %2 \n\t" /* prepare for processing 8 samples at a time */
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" cmp $0, %2 \n\t"
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" je 8f \n\t"
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"7: \n\t" /* do samples in groups of 8 */
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" movdqu (%q1, %3, 4), %%xmm0 \n\t" /* | v3h | v3l .. v0h | v0l | */
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" movdqu 16(%q1, %3, 4), %%xmm2 \n\t" /* | v7h | v7l .. v4h | v4l | */
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" movq (%0), %%xmm1 \n\t" /* .. | p3 .. p0 | */
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" movq 8(%0), %%xmm3 \n\t" /* .. | p7 .. p4 | */
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SWAP_16_2 (%%xmm1, %%xmm3)
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VOLUME_32x16 (%%xmm1, %%xmm0)
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VOLUME_32x16 (%%xmm3, %%xmm2)
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SWAP_16_2 (%%xmm0, %%xmm2)
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" movq %%xmm0, (%0) \n\t" /* .. | p3*v3 .. p0*v0 | */
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" movq %%xmm2, 8(%0) \n\t" /* .. | p7*v7 .. p4*v4 | */
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" add $16, %0 \n\t"
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MOD_ADD ($8, %5)
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" dec %2 \n\t"
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" jne 7b \n\t"
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"8: \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" (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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#endif /* (!defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) && defined (__i386__)) || defined (__amd64__) */
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void pa_volume_func_init_sse(pa_cpu_x86_flag_t flags) {
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#if (!defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) && defined (__i386__)) || defined (__amd64__)
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if (flags & PA_CPU_X86_SSE2) {
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pa_log_info("Initialising SSE2 optimized volume functions.");
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pa_set_volume_func(PA_SAMPLE_S16NE, (pa_do_volume_func_t) pa_volume_s16ne_sse2);
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pa_set_volume_func(PA_SAMPLE_S16RE, (pa_do_volume_func_t) pa_volume_s16re_sse2);
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}
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#endif /* (!defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) && defined (__i386__)) || defined (__amd64__) */
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}
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