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Replaced critical loop with assembler. A bit closer to realtime now. This codec really needs all the 64 bit muls replaced with EMAC equivalents.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6667 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thom Johansen 2005-06-11 01:04:59 +00:00
parent 197e3edce3
commit c82518ce06
2 changed files with 38 additions and 1 deletions
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1
apps/codecs/libmusepack/musepack.h
View file

@ -46,6 +46,7 @@ extern "C" {
#include <stdlib.h>
//#include <string.h>
#include "../codec.h"
#include "config_types.h"
#include "decoder.h"
#include "math.h"

38
apps/codecs/libmusepack/synth_filter.c
View file

@ -54,7 +54,7 @@ typedef mpc_int32_t ptrdiff_t;
#endif
static const MPC_SAMPLE_FORMAT Di_opt [32] [16] = {
static const MPC_SAMPLE_FORMAT Di_opt [32] [16] IDATA_ATTR = {
{ _( 0), _( -29), _( 213), _( -459), _( 2037), _(-5153), _( 6574), _(-37489), _(75038), _(37489), _(6574), _( 5153), _(2037), _( 459), _(213), _(29) },
{ _( -1), _( -31), _( 218), _( -519), _( 2000), _(-5517), _( 5959), _(-39336), _(74992), _(35640), _(7134), _( 4788), _(2063), _( 401), _(208), _(26) },
{ _( -1), _( -35), _( 222), _( -581), _( 1952), _(-5879), _( 5288), _(-41176), _(74856), _(33791), _(7640), _( 4425), _(2080), _( 347), _(202), _(24) },
@ -334,6 +334,10 @@ static void Calculate_New_V ( const MPC_SAMPLE_FORMAT * Sample, MPC_SAMPLE_FORMA
static void Synthese_Filter_float_internal(MPC_SAMPLE_FORMAT * OutData,MPC_SAMPLE_FORMAT * V,const MPC_SAMPLE_FORMAT * Y)
{
mpc_uint32_t n;
#if CONFIG_CPU==MCF5249 && !defined(SIMULATOR)
asm volatile ("move.l #0x20, %macsr"); /* fractional emac mode */
#endif
for ( n = 0; n < 36; n++, Y += 32 ) {
V -= 64;
Calculate_New_V ( Y, V );
@ -346,6 +350,37 @@ static void Synthese_Filter_float_internal(MPC_SAMPLE_FORMAT * OutData,MPC_SAMPL
for ( k = 0; k < 32; k++, D += 16, V++ ) {
#if CONFIG_CPU==MCF5249 && !defined(SIMULATOR)
asm volatile (
"movem.l (%[D]), %%d0-%%d3\n\t"
"move.l (%[V]), %%a5\n\t"
"mac.l %%d0, %%a5, (96*4, %[V]), %%a5, %%acc0\n\t"
"mac.l %%d1, %%a5, (128*4, %[V]), %%a5, %%acc0\n\t"
"mac.l %%d2, %%a5, (224*4, %[V]), %%a5, %%acc0\n\t"
"mac.l %%d3, %%a5, (256*4, %[V]), %%a5, %%acc0\n\t"
"movem.l (4*4, %[D]), %%d0-%%d3\n\t"
"mac.l %%d0, %%a5, (352*4, %[V]), %%a5, %%acc0\n\t"
"mac.l %%d1, %%a5, (384*4, %[V]), %%a5, %%acc0\n\t"
"mac.l %%d2, %%a5, (480*4, %[V]), %%a5, %%acc0\n\t"
"mac.l %%d3, %%a5, (512*4, %[V]), %%a5, %%acc0\n\t"
"movem.l (8*4, %[D]), %%d0-%%d3\n\t"
"mac.l %%d0, %%a5, (608*4, %[V]), %%a5, %%acc0\n\t"
"mac.l %%d1, %%a5, (640*4, %[V]), %%a5, %%acc0\n\t"
"mac.l %%d2, %%a5, (736*4, %[V]), %%a5, %%acc0\n\t"
"mac.l %%d3, %%a5, (768*4, %[V]), %%a5, %%acc0\n\t"
"movem.l (12*4, %[D]), %%d0-%%d3\n\t"
"mac.l %%d0, %%a5, (864*4, %[V]), %%a5, %%acc0\n\t"
"mac.l %%d1, %%a5, (896*4, %[V]), %%a5, %%acc0\n\t"
"mac.l %%d2, %%a5, (992*4, %[V]), %%a5, %%acc0\n\t"
"mac.l %%d3, %%a5, %%acc0\n\t"
"movclr.l %%acc0, %%d0\n\t"
"asl.l #1, %%d0\n\t"
"move.l %%d0, (%[Data])\n\t"
"addq.l #8, %[Data]"
: [Data] "+a" (Data)
: [V] "a" (V), [D] "a" (D)
: "d0", "d1", "d2", "d3", "a5");
#else
*Data = MPC_SHL(
MPC_MULTIPLY_FRACT(V[ 0],D[ 0]) + MPC_MULTIPLY_FRACT(V[ 96],D[ 1]) + MPC_MULTIPLY_FRACT(V[128],D[ 2]) + MPC_MULTIPLY_FRACT(V[224],D[ 3])
+ MPC_MULTIPLY_FRACT(V[256],D[ 4]) + MPC_MULTIPLY_FRACT(V[352],D[ 5]) + MPC_MULTIPLY_FRACT(V[384],D[ 6]) + MPC_MULTIPLY_FRACT(V[480],D[ 7])
@ -354,6 +389,7 @@ static void Synthese_Filter_float_internal(MPC_SAMPLE_FORMAT * OutData,MPC_SAMPL
, 2);
Data += 2;
#endif
}
V -= 32;//bleh
OutData+=64;