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Adding ICODE for imdct (and its constituent ifft bits) gives 0.5MHz boost on arm (ipod video) and about 5MHz boost on coldfire (H120)

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24786 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dave Hooper 2010-02-20 11:00:16 +00:00
parent 9f63f4f2fc
commit 730a618fae
2 changed files with 16 additions and 3 deletions
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13
apps/codecs/lib/fft-ffmpeg.c
View file

@ -57,6 +57,10 @@
/* asm-optimised functions and/or macros */
#include "fft-ffmpeg_arm.h"
#ifndef ICODE_ATTR_TREMOR_MDCT
#define ICODE_ATTR_TREMOR_MDCT ICODE_ATTR
#endif
#if 0
static int split_radix_permutation(int i, int n, int inverse)
{
@ -268,7 +272,8 @@ static inline void TRANSFORM_ZERO(FFTComplex * z, unsigned int n)
#endif
/* z[0...8n-1], w[1...2n-1] */
static void pass(FFTComplex *z_arg, unsigned int STEP_arg, unsigned int n_arg)
void pass(FFTComplex *z_arg, unsigned int STEP_arg, unsigned int n_arg) ICODE_ATTR_TREMOR_MDCT;
void pass(FFTComplex *z_arg, unsigned int STEP_arg, unsigned int n_arg)
{
register FFTComplex * z = z_arg;
register unsigned int STEP = STEP_arg;
@ -314,7 +319,8 @@ static void pass(FFTComplex *z_arg, unsigned int STEP_arg, unsigned int n_arg)
8192/16 (from "ff_cos_16") is 512 bytes.
i.e. for fft16, STEP = 8192/16 */
#define DECL_FFT(n,n2,n4)\
static void fft##n(FFTComplex *z)\
void fft##n(FFTComplex *z) ICODE_ATTR_TREMOR_MDCT;\
void fft##n(FFTComplex *z)\
{\
fft##n2(z);\
fft##n4(z+n4*2);\
@ -374,7 +380,8 @@ static void fft8_dispatch(FFTComplex *z)
}
#ifndef CONFIG_SMALL
static void fft16(FFTComplex *z)
void fft16(FFTComplex *z) ICODE_ATTR_TREMOR_MDCT;
void fft16(FFTComplex *z)
{
fft8(z);
fft4(z+8);

6
apps/codecs/lib/mdct.c
View file

@ -25,6 +25,10 @@
#include "codeclib_misc.h"
#include "mdct_lookup.h"
#ifndef ICODE_ATTR_TREMOR_MDCT
#define ICODE_ATTR_TREMOR_MDCT ICODE_ATTR
#endif
/**
* Compute the middle half of the inverse MDCT of size N = 2^nbits
* thus excluding the parts that can be derived by symmetry
@ -34,6 +38,7 @@
* NOTE - CANNOT CURRENTLY OPERATE IN PLACE (input and output must
* not overlap or intersect at all)
*/
void ff_imdct_half(unsigned int nbits, fixed32 *output, const fixed32 *input) ICODE_ATTR_TREMOR_MDCT;
void ff_imdct_half(unsigned int nbits, fixed32 *output, const fixed32 *input)
{
int n8, n4, n2, n, j;
@ -244,6 +249,7 @@ void ff_imdct_half(unsigned int nbits, fixed32 *output, const fixed32 *input)
* <-----------output----------->
*
*/
void ff_imdct_calc(unsigned int nbits, fixed32 *output, const fixed32 *input) ICODE_ATTR_TREMOR_MDCT;
void ff_imdct_calc(unsigned int nbits, fixed32 *output, const fixed32 *input)
{
const int n = (1<<nbits);