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codeclib: more cf asm for the mdct, saves ~0.7MHz decoding vorbis on h300.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30552 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Nils Wallménius 2011-09-15 08:31:39 +00:00
parent 454272cabf
commit 3f08357f2b
1 changed files with 115 additions and 1 deletions
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116
apps/codecs/lib/mdct.c
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@ -41,7 +41,7 @@ void ff_imdct_half(unsigned int nbits, fixed32 *output, const fixed32 *input)
{
int n8, n4, n2, n, j;
const fixed32 *in1, *in2;
(void)j;
n = 1 << nbits;
n2 = n >> 1;
@ -79,6 +79,62 @@ void ff_imdct_half(unsigned int nbits, fixed32 *output, const fixed32 *input)
const uint16_t * p_revtab=revtab;
{
const uint16_t * const p_revtab_end = p_revtab + n8;
#ifdef CPU_COLDFIRE
asm volatile ("move.l (%[in2]), %%d0\n\t"
"move.l (%[in1]), %%d1\n\t"
"bra.s 1f\n\t"
"0:\n\t"
"movem.l (%[T]), %%d2-%%d3\n\t"
"addq.l #8, %[in1]\n\t"
"subq.l #8, %[in2]\n\t"
"lea (%[step]*4, %[T]), %[T]\n\t"
"mac.l %%d0, %%d3, (%[T]), %%d4, %%acc0;"
"msac.l %%d1, %%d2, (4, %[T]), %%d5, %%acc0;"
"mac.l %%d1, %%d3, (%[in1]), %%d1, %%acc1;"
"mac.l %%d0, %%d2, (%[in2]), %%d0, %%acc1;"
"addq.l #8, %[in1]\n\t"
"subq.l #8, %[in2]\n\t"
"mac.l %%d0, %%d5, %%acc2;"
"msac.l %%d1, %%d4, (%[p_revtab])+, %%d2, %%acc2;"
"mac.l %%d1, %%d5, (%[in1]), %%d1, %%acc3;"
"mac.l %%d0, %%d4, (%[in2]), %%d0, %%acc3;"
"clr.l %%d3\n\t"
"move.w %%d2, %%d3\n\t"
"eor.l %%d3, %%d2\n\t"
"swap %%d2\n\t"
"lsr.l %[revtab_shift], %%d2\n\t"
"movclr.l %%acc0, %%d4;"
"movclr.l %%acc1, %%d5;"
"lsl.l #3, %%d2\n\t"
"lea (%%d2, %[z]), %%a1\n\t"
"movem.l %%d4-%%d5, (%%a1)\n\t"
"lsr.l %[revtab_shift], %%d3\n\t"
"movclr.l %%acc2, %%d4;"
"movclr.l %%acc3, %%d5;"
"lsl.l #3, %%d3\n\t"
"lea (%%d3, %[z]), %%a1\n\t"
"movem.l %%d4-%%d5, (%%a1)\n\t"
"lea (%[step]*4, %[T]), %[T]\n\t"
"1:\n\t"
"cmp.l %[p_revtab_end], %[p_revtab]\n\t"
"bcs.s 0b\n\t"
: [in1] "+a" (in1), [in2] "+a" (in2), [T] "+a" (T),
[p_revtab] "+a" (p_revtab)
: [z] "a" (z), [step] "d" (step), [revtab_shift] "d" (revtab_shift),
[p_revtab_end] "r" (p_revtab_end)
: "d0", "d1", "d2", "d3", "d4", "d5", "a1", "cc", "memory");
#else
while(LIKELY(p_revtab < p_revtab_end))
{
j = (*p_revtab)>>revtab_shift;
@ -94,9 +150,66 @@ void ff_imdct_half(unsigned int nbits, fixed32 *output, const fixed32 *input)
in2 -= 2;
p_revtab++;
}
#endif
}
{
const uint16_t * const p_revtab_end = p_revtab + n8;
#ifdef CPU_COLDFIRE
asm volatile ("move.l (%[in2]), %%d0\n\t"
"move.l (%[in1]), %%d1\n\t"
"bra.s 1f\n\t"
"0:\n\t"
"movem.l (%[T]), %%d2-%%d3\n\t"
"addq.l #8, %[in1]\n\t"
"subq.l #8, %[in2]\n\t"
"lea (%[step]*4, %[T]), %[T]\n\t"
"mac.l %%d0, %%d2, (%[T]), %%d4, %%acc0;"
"msac.l %%d1, %%d3, (4, %[T]), %%d5, %%acc0;"
"mac.l %%d1, %%d2, (%[in1]), %%d1, %%acc1;"
"mac.l %%d0, %%d3, (%[in2]), %%d0, %%acc1;"
"addq.l #8, %[in1]\n\t"
"subq.l #8, %[in2]\n\t"
"mac.l %%d0, %%d4, %%acc2;"
"msac.l %%d1, %%d5, (%[p_revtab])+, %%d2, %%acc2;"
"mac.l %%d1, %%d4, (%[in1]), %%d1, %%acc3;"
"mac.l %%d0, %%d5, (%[in2]), %%d0, %%acc3;"
"clr.l %%d3\n\t"
"move.w %%d2, %%d3\n\t"
"eor.l %%d3, %%d2\n\t"
"swap %%d2\n\t"
"lsr.l %[revtab_shift], %%d2\n\t"
"movclr.l %%acc0, %%d4;"
"movclr.l %%acc1, %%d5;"
"lsl.l #3, %%d2\n\t"
"lea (%%d2, %[z]), %%a1\n\t"
"movem.l %%d4-%%d5, (%%a1)\n\t"
"lsr.l %[revtab_shift], %%d3\n\t"
"movclr.l %%acc2, %%d4;"
"movclr.l %%acc3, %%d5;"
"lsl.l #3, %%d3\n\t"
"lea (%%d3, %[z]), %%a1\n\t"
"movem.l %%d4-%%d5, (%%a1)\n\t"
"lea (%[step]*4, %[T]), %[T]\n\t"
"1:\n\t"
"cmp.l %[p_revtab_end], %[p_revtab]\n\t"
"bcs.s 0b\n\t"
: [in1] "+a" (in1), [in2] "+a" (in2), [T] "+a" (T),
[p_revtab] "+a" (p_revtab)
: [z] "a" (z), [step] "d" (-step), [revtab_shift] "d" (revtab_shift),
[p_revtab_end] "r" (p_revtab_end)
: "d0", "d1", "d2", "d3", "d4", "d5", "a1", "cc", "memory");
#else
while(LIKELY(p_revtab < p_revtab_end))
{
j = (*p_revtab)>>revtab_shift;
@ -112,6 +225,7 @@ void ff_imdct_half(unsigned int nbits, fixed32 *output, const fixed32 *input)
in2 -= 2;
p_revtab++;
}
#endif
}