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FS#10943, optimized division and clz routines to replace libgcc routines for ARM. Replaces libgcc support functions for unsigned and signed 32-bit division on ARMv4 and up, and leading-zero count on ARMv4.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24432 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Andrew Mahone 2010-02-01 01:36:46 +00:00
parent 40a3e80697
commit bff5a35c3c
5 changed files with 703 additions and 1 deletions
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2
apps/codecs/lib/codeclib.h
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@ -65,7 +65,7 @@ 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);
#ifdef CPU_ARM
#if defined(CPU_ARM) && (ARM_ARCH < 5 || defined(USE_IRAM))
/* optimised unsigned integer division for ARMv4, in IRAM */
unsigned udiv32_arm(unsigned a, unsigned b);
#define UDIV32(a, b) udiv32_arm(a, b)