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Basic optimizations of the Vorbis decoder for the ihp-1x0.

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Capable of real-time decoding with cpu freq at 120mhz.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6527 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Pedro Vasconcelos 2005-05-27 09:14:00 +00:00
parent 3841348930
commit 024db0a766
22 changed files with 428 additions and 107 deletions
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29
apps/codecs/Tremor/misc.h
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@ -23,6 +23,7 @@
#include "os_types.h"
#include "asm_arm.h"
#include "asm_mcf5249.h"
/* Some prototypes that were not defined elsewhere */
@ -36,7 +37,6 @@ void* alloca(size_t size);
#ifndef _LOW_ACCURACY_
/* 64 bit multiply */
//#include <sys/types.h>
#if BYTE_ORDER==LITTLE_ENDIAN
@ -47,9 +47,7 @@ union magic {
} halves;
ogg_int64_t whole;
};
#endif
#if BYTE_ORDER==BIG_ENDIAN
#elif BYTE_ORDER==BIG_ENDIAN
union magic {
struct {
ogg_int32_t hi;
@ -64,7 +62,6 @@ static inline ogg_int32_t MULT32(ogg_int32_t x, ogg_int32_t y) {
magic.whole = (ogg_int64_t)x * y;
return magic.halves.hi;
}
static inline ogg_int32_t MULT31(ogg_int32_t x, ogg_int32_t y) {
return MULT32(x,y)<<1;
}
@ -102,7 +99,6 @@ static inline ogg_int32_t MULT31(ogg_int32_t x, ogg_int32_t y) {
static inline ogg_int32_t MULT31_SHIFT15(ogg_int32_t x, ogg_int32_t y) {
return (x >> 6) * y; /* y preshifted >>9 */
}
#endif
/*
@ -122,11 +118,15 @@ static inline ogg_int32_t MULT31_SHIFT15(ogg_int32_t x, ogg_int32_t y) {
* macros.
*/
/* replaced XPROD32 with a macro to avoid memory reference
_x, _y are the results (must be l-values) */
#define XPROD32(_a, _b, _t, _v, _x, _y) \
{ (_x)=MULT32(_a,_t)+MULT32(_b,_v); \
(_y)=MULT32(_b,_t)-MULT32(_a,_v); }
#ifdef __i386__
#define XPROD32(_a, _b, _t, _v, _x, _y) \
{ *(_x)=MULT32(_a,_t)+MULT32(_b,_v); \
*(_y)=MULT32(_b,_t)-MULT32(_a,_v); }
#define XPROD31(_a, _b, _t, _v, _x, _y) \
{ *(_x)=MULT31(_a,_t)+MULT31(_b,_v); \
*(_y)=MULT31(_b,_t)-MULT31(_a,_v); }
@ -136,14 +136,6 @@ static inline ogg_int32_t MULT31_SHIFT15(ogg_int32_t x, ogg_int32_t y) {
#else
static inline void XPROD32(ogg_int32_t a, ogg_int32_t b,
ogg_int32_t t, ogg_int32_t v,
ogg_int32_t *x, ogg_int32_t *y)
{
*x = MULT32(a, t) + MULT32(b, v);
*y = MULT32(b, t) - MULT32(a, v);
}
static inline void XPROD31(ogg_int32_t a, ogg_int32_t b,
ogg_int32_t t, ogg_int32_t v,
ogg_int32_t *x, ogg_int32_t *y)
@ -159,9 +151,7 @@ static inline void XNPROD31(ogg_int32_t a, ogg_int32_t b,
*x = MULT31(a, t) - MULT31(b, v);
*y = MULT31(b, t) + MULT31(a, v);
}
#endif
#endif
#ifndef _V_CLIP_MATH
@ -245,4 +235,3 @@ static inline ogg_int32_t VFLOAT_ADD(ogg_int32_t a,ogg_int32_t ap,