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libtremor: cf asm for ff_vector_fmul_window_c, gives a speedup of ~0.3MHz.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30582 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Nils Wallménius 2011-09-22 17:32:02 +00:00
parent 3afdedaef2
commit c2bd876e89
1 changed files with 53 additions and 0 deletions
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53
apps/codecs/libtremor/asm_mcf5249.h
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@ -26,6 +26,59 @@
#ifndef _V_WIDE_MATH
#define _V_WIDE_MATH
#define INCL_OPTIMIZED_VECTOR_FMUL_WINDOW
static inline void ff_vector_fmul_window_c(ogg_int32_t *dst, const ogg_int32_t *src0,
const ogg_int32_t *src1, const ogg_int32_t *win, int len)
{
/* len is always a power of 2 and always >= 16 so this is unrolled 4 times*/
ogg_int32_t *dst0 = dst, *dst1 = dst + 2*len;
const ogg_int32_t *win0 = win, *win1 = win + 2*len;
src1 += len;
asm volatile ("move.l (%[src0])+, %%d0\n\t"
"move.l -(%[win1]), %%d3\n\t"
"tst.l %[len]\n\t"
"bra.s 1f\n\t"
"0:\n\t"
"mac.l %%d0, %%d3, (%[win0])+, %%d2, %%acc0\n\t"
"mac.l %%d0, %%d2, -(%[src1]), %%d1, %%acc1\n\t"
"msac.l %%d1, %%d2, (%[src0])+, %%d0, %%acc0\n\t"
"mac.l %%d1, %%d3, -(%[win1]), %%d3, %%acc1\n\t"
"mac.l %%d0, %%d3, (%[win0])+, %%d2, %%acc2\n\t"
"mac.l %%d0, %%d2, -(%[src1]), %%d1, %%acc3\n\t"
"msac.l %%d1, %%d2, (%[src0])+, %%d0, %%acc2\n\t"
"mac.l %%d1, %%d3, -(%[win1]), %%d3, %%acc3\n\t"
"movclr.l %%acc0, %%d1\n\t"
"movclr.l %%acc2, %%d2\n\t"
"subq.l #8, %[dst1]\n\t"
"movclr.l %%acc1, %%d5\n\t"
"movclr.l %%acc3, %%d4\n\t"
"movem.l %%d4-%%d5, (%[dst1])\n\t"
"mac.l %%d0, %%d3, (%[win0])+, %%d5, %%acc0\n\t"
"mac.l %%d0, %%d5, -(%[src1]), %%d4, %%acc1\n\t"
"msac.l %%d4, %%d5, (%[src0])+, %%d0, %%acc0\n\t"
"mac.l %%d4, %%d3, -(%[win1]), %%d3, %%acc1\n\t"
"mac.l %%d0, %%d3, (%[win0])+, %%d5, %%acc2\n\t"
"mac.l %%d0, %%d5, -(%[src1]), %%d4, %%acc3\n\t"
"msac.l %%d4, %%d5, (%[src0])+, %%d0, %%acc2\n\t" /* will read one past end of src0 */
"mac.l %%d4, %%d3, -(%[win1]), %%d3, %%acc3\n\t" /* will read one into win0 */
"movclr.l %%acc0, %%d4\n\t"
"movclr.l %%acc2, %%d5\n\t"
"movem.l %%d1-%%d2/%%d4-%%d5, (%[dst0])\n\t"
"lea (16, %[dst0]), %[dst0]\n\t"
"subq.l #8, %[dst1]\n\t"
"movclr.l %%acc1, %%d2\n\t"
"movclr.l %%acc3, %%d1\n\t"
"movem.l %%d1-%%d2, (%[dst1])\n\t"
"subq.l #4, %[len]\n\t"
"1:\n\t"
"bgt.s 0b\n\t"
: [dst0] "+a" (dst0), [dst1] "+a" (dst1),
[src0] "+a" (src0), [src1] "+a" (src1),
[win0] "+a" (win0), [win1] "+a" (win1),
[len] "+d" (len)
:: "d0", "d1", "d2", "d3", "d4", "d5", "cc", "memory" );
}
#define MB()
#endif