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libtremor: introduce asm optimized version of the channel_couple function for Coldfire and optimize the arm as version, speedup ~1% on Coldfire and PortalPlayer.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28405 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Nils Wallménius 2010-10-31 08:19:19 +00:00
parent e23075bc55
commit 78b2711e58
1 changed files with 61 additions and 23 deletions
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76
apps/codecs/libtremor/mapping0.c
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@ -182,19 +182,13 @@ static vorbis_info_mapping *mapping0_unpack(vorbis_info *vi,oggpack_buffer *opb)
#define MAGANG( _mag, _ang )\
{\
register int temp;\
asm( "cmp %[mag], #0\n\t"\
"cmpgt %[ang], #0\n\t"\
"subgt %[ang], %[mag], %[ang]\n\t"\
"bgt 1f\n\t"\
asm( "mov %[temp], %[ang]\n\t"\
"cmp %[mag], #0\n\t"\
"cmple %[ang], #0\n\t"\
"addgt %[temp], %[mag], %[ang]\n\t"\
"suble %[temp], %[mag], %[ang]\n\t"\
"rsble %[temp], %[temp], #0\n\t"\
"cmp %[ang], #0\n\t"\
"subgt %[ang], %[mag], %[temp]\n\t"\
"movle %[ang], %[mag]\n\t"\
"movle %[mag], %[temp]\n\t"\
"movgt %[ang], %[temp]\n\t"\
"1:\n\t"\
"addle %[mag], %[mag], %[temp]\n\t"\
: [mag] "+r" ( ( _mag ) ), [ang] "+r" ( ( _ang ) ), [temp] "=&r" (temp)\
:\
: "cc" );\
@ -225,26 +219,70 @@ static inline void channel_couple(ogg_int32_t *pcmM, ogg_int32_t *pcmA, int n)
: "memory" );
}
}
#elif defined CPU_COLDFIRE
#define MAGANG( _mag, _ang, _pcmA, _pcmM, _off )\
{\
int temp;\
asm volatile( "move.l %[ang], %[temp]\n\t"\
"tst.l %[mag]\n\t"\
"bgt.s 1f\n\t"\
"neg.l %[temp]\n\t"\
"1:\n\t"\
"tst.l %[ang]\n\t"\
"bgt.s 2f\n\t"\
"add.l %[mag], %[temp]\n\t"\
"move.l %[temp], (" #_off ", %[pcmM])\n\t"\
".word 0x51fa\n\t" /* trapf.w, shadow next insn */ \
"2:\n\t"\
"sub.l %[temp], %[mag]\n\t"\
"move.l %[mag], (%[pcmA])+\n\t"\
: [mag] "+r" ( ( _mag ) ), [ang] "+d" ( ( _ang ) ), [temp] "=&d" (temp),\
[pcmA] "+a" (pcmA)\
: [pcmM] "a" (pcmM)\
: "cc", "memory" );\
}
static inline void channel_couple(ogg_int32_t *pcmM, ogg_int32_t *pcmA, unsigned int n)
{
ogg_int32_t * const pcmMend = pcmM + n/2;
while(LIKELY(pcmM < pcmMend))
{
register int M0 asm("a2"),M1 asm("a3"),M2 asm("a4"),M3 asm("a5");
register int A0 asm("d2"),A1 asm("d3"),A2 asm("d4"),A3 asm("d5");
asm volatile( "movem.l (%[pcmM]), %[M0]-%[M3]\n\t"
"movem.l (%[pcmA]), %[A0]-%[A3]\n\t"
: [M0] "=r" (M0), [M1] "=r" (M1), [M2] "=r" (M2), [M3] "=r" (M3),
[A0] "=r" (A0), [A1] "=r" (A1), [A2] "=r" (A2), [A3] "=r" (A3)
: [pcmM] "a" (pcmM), [pcmA] "a" (pcmA) );
MAGANG( M0, A0, pcmA, pcmM, 0 );
MAGANG( M1, A1, pcmA, pcmM, 4 );
MAGANG( M2, A2, pcmA, pcmM, 8 );
MAGANG( M3, A3, pcmA, pcmM, 12 );
asm volatile( "lea.l (4*4, %[pcmM]), %[pcmM]\n\t"
: [pcmM] "+a" (pcmM));
}
}
#else
static inline void channel_couple(ogg_int32_t *pcmM, ogg_int32_t *pcmA, int n)
{
int j;
for(j=0;j<n/2;j++){
ogg_int32_t mag = pcmM[j], ang = pcmA[j];
ogg_int32_t mag = pcmM[j], ang = pcmA[j], _ang;
if(mag>0)
if(ang>0)
pcmA[j]=mag-ang;
else{
pcmA[j]=mag;
pcmM[j]=mag+ang;
}
_ang = ang;
else
_ang = -ang;
if(ang>0)
pcmA[j]=mag+ang;
pcmA[j]=mag-_ang;
else{
pcmA[j]=mag;
pcmM[j]=mag-ang;
pcmM[j]=mag+_ang;
}
}
}
#endif