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for example, the conversion function for convert_from_float32ne(PA_SAMPLE_S16LE) can also be used for convert_to_s16ne(PA_SAMPLE_FLOAT32LE) v2: ARM can potentially be big- or little endian; only apply optimization on LE based on WORDS_BIGENDIAN #define (thanks, Tanu) Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
179 lines
6.8 KiB
C
179 lines
6.8 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 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
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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 <stdio.h>
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#include <stdlib.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 "sconv.h"
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#if (!defined(__APPLE__) && !defined(__FreeBSD__) && defined (__i386__)) || defined (__amd64__)
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static const PA_DECLARE_ALIGNED (16, float, scale[4]) = { 0x8000, 0x8000, 0x8000, 0x8000 };
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static void pa_sconv_s16le_from_f32ne_sse(unsigned n, const float *a, int16_t *b) {
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pa_reg_x86 temp, i;
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__asm__ __volatile__ (
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" movaps %5, %%xmm5 \n\t"
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" xor %0, %0 \n\t"
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" mov %4, %1 \n\t"
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" sar $3, %1 \n\t" /* 8 floats at a time */
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" cmp $0, %1 \n\t"
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" je 2f \n\t"
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"1: \n\t"
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" movups (%q2, %0, 2), %%xmm0 \n\t" /* read 8 floats */
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" movups 16(%q2, %0, 2), %%xmm2 \n\t"
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" mulps %%xmm5, %%xmm0 \n\t" /* *= 0x8000 */
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" mulps %%xmm5, %%xmm2 \n\t"
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" cvtps2pi %%xmm0, %%mm0 \n\t" /* low part to int */
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" cvtps2pi %%xmm2, %%mm2 \n\t"
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" movhlps %%xmm0, %%xmm0 \n\t" /* bring high part in position */
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" movhlps %%xmm2, %%xmm2 \n\t"
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" cvtps2pi %%xmm0, %%mm1 \n\t" /* high part to int */
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" cvtps2pi %%xmm2, %%mm3 \n\t"
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" packssdw %%mm1, %%mm0 \n\t" /* pack parts */
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" packssdw %%mm3, %%mm2 \n\t"
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" movq %%mm0, (%q3, %0) \n\t"
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" movq %%mm2, 8(%q3, %0) \n\t"
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" add $16, %0 \n\t"
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" dec %1 \n\t"
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" jne 1b \n\t"
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"2: \n\t"
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" mov %4, %1 \n\t" /* prepare for leftovers */
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" and $7, %1 \n\t"
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" je 5f \n\t"
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"3: \n\t"
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" movss (%q2, %0, 2), %%xmm0 \n\t"
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" mulss %%xmm5, %%xmm0 \n\t"
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" cvtss2si %%xmm0, %4 \n\t"
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" add $0x8000, %4 \n\t" /* check for saturation */
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" and $~0xffff, %4 \n\t"
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" cvtss2si %%xmm0, %4 \n\t"
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" je 4f \n\t"
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" sar $31, %4 \n\t"
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" xor $0x7fff, %4 \n\t"
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"4: \n\t"
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" movw %w4, (%q3, %0) \n\t" /* store leftover */
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" add $2, %0 \n\t"
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" dec %1 \n\t"
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" jne 3b \n\t"
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"5: \n\t"
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" emms \n\t"
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: "=&r" (i), "=&r" (temp)
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: "r" (a), "r" (b), "r" ((pa_reg_x86)n), "m" (*scale)
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: "cc", "memory"
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);
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}
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static void pa_sconv_s16le_from_f32ne_sse2(unsigned n, const float *a, int16_t *b) {
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pa_reg_x86 temp, i;
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__asm__ __volatile__ (
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" movaps %5, %%xmm5 \n\t"
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" xor %0, %0 \n\t"
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" mov %4, %1 \n\t"
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" sar $3, %1 \n\t" /* 8 floats at a time */
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" cmp $0, %1 \n\t"
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" je 2f \n\t"
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"1: \n\t"
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" movups (%q2, %0, 2), %%xmm0 \n\t" /* read 8 floats */
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" movups 16(%q2, %0, 2), %%xmm2 \n\t"
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" mulps %%xmm5, %%xmm0 \n\t" /* *= 0x8000 */
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" mulps %%xmm5, %%xmm2 \n\t"
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" cvtps2dq %%xmm0, %%xmm0 \n\t"
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" cvtps2dq %%xmm2, %%xmm2 \n\t"
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" packssdw %%xmm2, %%xmm0 \n\t"
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" movdqu %%xmm0, (%q3, %0) \n\t"
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" add $16, %0 \n\t"
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" dec %1 \n\t"
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" jne 1b \n\t"
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"2: \n\t"
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" mov %4, %1 \n\t" /* prepare for leftovers */
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" and $7, %1 \n\t"
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" je 5f \n\t"
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"3: \n\t"
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" movss (%q2, %0, 2), %%xmm0 \n\t"
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" mulss %%xmm5, %%xmm0 \n\t"
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" cvtss2si %%xmm0, %4 \n\t"
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" add $0x8000, %4 \n\t"
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" and $~0xffff, %4 \n\t" /* check for saturation */
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" cvtss2si %%xmm0, %4 \n\t"
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" je 4f \n\t"
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" sar $31, %4 \n\t"
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" xor $0x7fff, %4 \n\t"
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"4: \n\t"
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" movw %w4, (%q3, %0) \n\t" /* store leftover */
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" add $2, %0 \n\t"
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" dec %1 \n\t"
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" jne 3b \n\t"
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"5: \n\t"
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: "=&r" (i), "=&r" (temp)
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: "r" (a), "r" (b), "r" ((pa_reg_x86)n), "m" (*scale)
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: "cc", "memory"
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);
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}
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#endif /* defined (__i386__) || defined (__amd64__) */
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void pa_convert_func_init_sse(pa_cpu_x86_flag_t flags) {
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#if (!defined(__APPLE__) && !defined(__FreeBSD__) && defined (__i386__)) || defined (__amd64__)
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if (flags & PA_CPU_X86_SSE2) {
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pa_log_info("Initialising SSE2 optimized conversions.");
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pa_set_convert_from_float32ne_function(PA_SAMPLE_S16LE, (pa_convert_func_t) pa_sconv_s16le_from_f32ne_sse2);
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pa_set_convert_to_s16ne_function(PA_SAMPLE_FLOAT32LE, (pa_convert_func_t) pa_sconv_s16le_from_f32ne_sse2);
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} else if (flags & PA_CPU_X86_SSE) {
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pa_log_info("Initialising SSE optimized conversions.");
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pa_set_convert_from_float32ne_function(PA_SAMPLE_S16LE, (pa_convert_func_t) pa_sconv_s16le_from_f32ne_sse);
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pa_set_convert_to_s16ne_function(PA_SAMPLE_FLOAT32LE, (pa_convert_func_t) pa_sconv_s16le_from_f32ne_sse);
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}
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#endif /* defined (__i386__) || defined (__amd64__) */
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}
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