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Enabled minor Tremor opt.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6688 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thom Johansen 2005-06-12 12:53:10 +00:00
parent a1d75d3c79
commit ca19564eec
1 changed files with 6 additions and 5 deletions
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11
apps/codecs/Tremor/asm_mcf5249.h
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@ -110,14 +110,16 @@ void XNPROD31(ogg_int32_t a, ogg_int32_t b,
} }
#if 1 #if 0
/* canonical definition */ /* canonical definition */
#define XPROD32(_a, _b, _t, _v, _x, _y) \ #define XPROD32(_a, _b, _t, _v, _x, _y) \
{ (_x)=MULT32(_a,_t)+MULT32(_b,_v); \ { (_x)=MULT32(_a,_t)+MULT32(_b,_v); \
(_y)=MULT32(_b,_t)-MULT32(_a,_v); } (_y)=MULT32(_b,_t)-MULT32(_a,_v); }
#else #endif
/* Thom Johansen's suggestion; this could loose the LSB by overflow;
Does it matter in practice? */ /* this could lose the LSB by overflow, but i don't think it'll ever happen.
if anyone think they can hear a bug caused by this, please try the above
version. */
#define XPROD32(_a, _b, _t, _v, _x, _y) \ #define XPROD32(_a, _b, _t, _v, _x, _y) \
asm volatile ("mac.l %[a], %[t], %%acc0;" \ asm volatile ("mac.l %[a], %[t], %%acc0;" \
"mac.l %[b], %[v], %%acc0;" \ "mac.l %[b], %[v], %%acc0;" \
@ -131,7 +133,6 @@ void XNPROD31(ogg_int32_t a, ogg_int32_t b,
: [a] "r" (_a), [b] "r" (_b), \ : [a] "r" (_a), [b] "r" (_b), \
[t] "r" (_t), [v] "r" (_v) \ [t] "r" (_t), [v] "r" (_v) \
: "cc"); : "cc");
#endif
/* asm versions of vector operations for block.c, window.c */ /* asm versions of vector operations for block.c, window.c */