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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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6
apps/codecs/lib/mdct.c
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@ -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);