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/***
This file is part of PulseAudio.
Copyright 2004-2006 Lennart Poettering
Copyright 2009 Wim Taymans <wim.taymans@collabora.co.uk.com>
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <pulse/sample.h>
#include <pulse/volume.h>
#include <pulsecore/log.h>
#include <pulsecore/macro.h>
#include "cpu-x86.h"
#include "remap.h"
#define LOAD_SAMPLES \
" movq (%1), %%mm0 \n\t" \
" movq 8(%1), %%mm2 \n\t" \
" movq 16(%1), %%mm4 \n\t" \
" movq 24(%1), %%mm6 \n\t" \
" movq %%mm0, %%mm1 \n\t" \
" movq %%mm2, %%mm3 \n\t" \
" movq %%mm4, %%mm5 \n\t" \
" movq %%mm6, %%mm7 \n\t"
#define UNPACK_SAMPLES(s) \
" punpckl"#s" %%mm0, %%mm0 \n\t" \
" punpckh"#s" %%mm1, %%mm1 \n\t" \
" punpckl"#s" %%mm2, %%mm2 \n\t" \
" punpckh"#s" %%mm3, %%mm3 \n\t" \
" punpckl"#s" %%mm4, %%mm4 \n\t" \
" punpckh"#s" %%mm5, %%mm5 \n\t" \
" punpckl"#s" %%mm6, %%mm6 \n\t" \
" punpckh"#s" %%mm7, %%mm7 \n\t"
#define STORE_SAMPLES \
" movq %%mm0, (%0) \n\t" \
" movq %%mm1, 8(%0) \n\t" \
" movq %%mm2, 16(%0) \n\t" \
" movq %%mm3, 24(%0) \n\t" \
" movq %%mm4, 32(%0) \n\t" \
" movq %%mm5, 40(%0) \n\t" \
" movq %%mm6, 48(%0) \n\t" \
" movq %%mm7, 56(%0) \n\t" \
" add $32, %1 \n\t" \
" add $64, %0 \n\t"
#define HANDLE_SINGLE_dq() \
" movd (%1), %%mm0 \n\t" \
" punpckldq %%mm0, %%mm0 \n\t" \
" movq %%mm0, (%0) \n\t" \
" add $4, %1 \n\t" \
" add $8, %0 \n\t"
#define HANDLE_SINGLE_wd() \
" movw (%1), %w3 \n\t" \
" movd %3, %%mm0 \n\t" \
" punpcklwd %%mm0, %%mm0 \n\t" \
" movd %%mm0, (%0) \n\t" \
" add $2, %1 \n\t" \
" add $4, %0 \n\t"
#define MONO_TO_STEREO(s,shift,mask) \
" mov %4, %2 \n\t" \
" sar $"#shift", %2 \n\t" \
" cmp $0, %2 \n\t" \
" je 2f \n\t" \
"1: \n\t" \
LOAD_SAMPLES \
UNPACK_SAMPLES(s) \
STORE_SAMPLES \
" dec %2 \n\t" \
" jne 1b \n\t" \
"2: \n\t" \
" mov %4, %2 \n\t" \
" and $"#mask", %2 \n\t" \
" je 4f \n\t" \
"3: \n\t" \
HANDLE_SINGLE_##s() \
" dec %2 \n\t" \
" jne 3b \n\t" \
"4: \n\t" \
" emms \n\t"
#if defined (__i386__) || defined (__amd64__)
static void remap_mono_to_stereo_s16ne_mmx(pa_remap_t *m, int16_t *dst, const int16_t *src, unsigned n) {
pa_reg_x86 temp, temp2;
__asm__ __volatile__ (
MONO_TO_STEREO(wd,4,15) /* do words to doubles */
: "+r" (dst), "+r" (src), "=&r" (temp), "=&r" (temp2)
: "r" ((pa_reg_x86)n)
: "cc"
);
}
static void remap_mono_to_stereo_float32ne_mmx(pa_remap_t *m, float *dst, const float *src, unsigned n) {
pa_reg_x86 temp, temp2;
__asm__ __volatile__ (
MONO_TO_STEREO(dq,3,7) /* do doubles to quads */
: "+r" (dst), "+r" (src), "=&r" (temp), "=&r" (temp2)
: "r" ((pa_reg_x86)n)
: "cc"
);
}
/* set the function that will execute the remapping based on the matrices */
static void init_remap_mmx(pa_remap_t *m) {
unsigned n_oc, n_ic;
n_oc = m->o_ss.channels;
n_ic = m->i_ss.channels;
/* find some common channel remappings, fall back to full matrix operation. */
if (n_ic == 1 && n_oc == 2 &&
m->map_table_i[0][0] == 0x10000 && m->map_table_i[1][0] == 0x10000) {
pa_log_info("Using MMX mono to stereo remapping");
pa_set_remap_func(m, (pa_do_remap_func_t) remap_mono_to_stereo_s16ne_mmx,
(pa_do_remap_func_t) remap_mono_to_stereo_float32ne_mmx);
}
}
#endif /* defined (__i386__) || defined (__amd64__) */
void pa_remap_func_init_mmx(pa_cpu_x86_flag_t flags) {
#if defined (__i386__) || defined (__amd64__)
if (flags & PA_CPU_X86_MMX) {
pa_log_info("Initialising MMX optimized remappers.");
pa_set_init_remap_func((pa_init_remap_func_t) init_remap_mmx);
}
#endif /* defined (__i386__) || defined (__amd64__) */
}
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