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codeclib: coldfire asm for the TRANSFORM* functions in the fft and a little for the mdct, speeds up codecs using the codeclib mdct 0.5-1.5MHz on h300.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30513 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Nils Wallménius 2011-09-12 11:27:48 +00:00
parent edf06b7324
commit f93530c4ba
2 changed files with 205 additions and 2 deletions
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43
apps/codecs/lib/mdct.c
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@ -134,12 +134,50 @@ void ff_imdct_half(unsigned int nbits, fixed32 *output, const fixed32 *input)
}
else
{
T = sincos_lookup1;
newstep = 2;
T = sincos_lookup1;
newstep = 2;
}
while(z1<z2)
{
#ifdef CPU_COLDFIRE
asm volatile ("movem.l (%[z1]), %%d0-%%d1\n\t"
"movem.l (%[T]), %%d2-%%d3\n\t"
"mac.l %%d1, %%d2, %%acc0\n\t"
"msac.l %%d0, %%d3, %%acc0\n\t"
"mac.l %%d0, %%d2, %%acc1\n\t"
"mac.l %%d1, %%d3, %%acc1\n\t"
"lea (%[newstep]*4, %[T]), %[T]\n\t"
"movem.l (%[z2]), %%d0-%%d1\n\t"
"movem.l (%[T]), %%d2-%%d3\n\t"
"mac.l %%d1, %%d3, %%acc2\n\t"
"msac.l %%d0, %%d2, %%acc2\n\t"
"mac.l %%d0, %%d3, %%acc3\n\t"
"mac.l %%d1, %%d2, %%acc3\n\t"
"lea (%[newstep]*4, %[T]), %[T]\n\t"
"movclr.l %%acc0, %%d0\n\t"
"movclr.l %%acc1, %%d2\n\t"
"movclr.l %%acc2, %%d1\n\t"
"movclr.l %%acc3, %%d3\n\t"
"neg.l %%d0\n\t"
"neg.l %%d1\n\t"
"neg.l %%d2\n\t"
"neg.l %%d3\n\t"
"movem.l %%d0/%%d3, (%[z1])\n\t"
"movem.l %%d1/%%d2, (%[z2])\n\t"
"addq.l #8, %[z1]\n\t"
"subq.l #8, %[z2]\n\t"
: [z1] "+a" (z1), [z2] "+a" (z2), [T] "+a" (T)
: [newstep] "d" (newstep)
: "d0", "d1", "d2", "d3", "cc", "memory");
#else
fixed32 r0,i0,r1,i1;
XNPROD31_R(z1[1], z1[0], T[0], T[1], r0, i1 ); T+=newstep;
XNPROD31_R(z2[1], z2[0], T[1], T[0], r1, i0 ); T+=newstep;
@ -149,6 +187,7 @@ void ff_imdct_half(unsigned int nbits, fixed32 *output, const fixed32 *input)
z2[1] = -i1;
z1+=2;
z2-=2;
#endif
}
break;