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| author | Jens Arnold <amiconn@rockbox.org> | 2008-11-05 00:10:05 +0000 |
|---|---|---|
| committer | Jens Arnold <amiconn@rockbox.org> | 2008-11-05 00:10:05 +0000 |
| commit | fe04e40be7a26c758a82e410e58be63c1f3d571c (patch) | |
| tree | 955b1557f3da7cd8362bc05d96302cac08a72ff2 /apps/codecs/lib/codeclib.h | |
| parent | 7a835ee0c64bb941f205a2eb915cf0aaf460f1bc (diff) | |
| download | rockbox-fe04e40be7a26c758a82e410e58be63c1f3d571c.zip rockbox-fe04e40be7a26c758a82e410e58be63c1f3d571c.tar.gz rockbox-fe04e40be7a26c758a82e410e58be63c1f3d571c.tar.bz2 rockbox-fe04e40be7a26c758a82e410e58be63c1f3d571c.tar.xz | |
Further optimised (vs. libgcc) unsigned 32 bit division for ARMv4 (based on the ARMv5(+) version from libgcc), in IRAM on PP for better performance on PP5002, and put into the codeclib for possible reuse. APE -c1000 is now usable on both PP502x and PP5002 (~138% realtime, they're on par now). Gigabeat F/X should also see an APE speedup.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19009 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/codecs/lib/codeclib.h')
| -rw-r--r-- | apps/codecs/lib/codeclib.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/apps/codecs/lib/codeclib.h b/apps/codecs/lib/codeclib.h index 744accb..477818a 100644 --- a/apps/codecs/lib/codeclib.h +++ b/apps/codecs/lib/codeclib.h @@ -57,6 +57,15 @@ void qsort(void *base, size_t nmemb, size_t size, int(*compar)(const void *, con extern void mdct_backward(int n, int32_t *in, int32_t *out); +#if defined(CPU_ARM) && (ARM_ARCH == 4) +/* optimised unsigned integer division for ARMv4, in IRAM */ +unsigned udiv32_arm(unsigned a, unsigned b); +#define UDIV32(a, b) udiv32_arm(a, b) +#else +/* default */ +#define UDIV32(a, b) (a / b) +#endif + /* Various codec helper functions */ int codec_init(void); |