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opus: improve cf MULT16_32_Q15 by giving the compiler more freedom

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saves about 3MHz when decoding a 64kbps test file

Change-Id: I10f47173ccb78e60e364662220d1db2f78dd5fdd
This commit is contained in:
Nils Wallménius 2012-09-26 11:21:25 +02:00
parent 5f60590e80
commit 425725edb0
1 changed files with 6 additions and 7 deletions
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13
lib/rbcodec/codecs/libopus/celt/fixed_generic.h
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@ -45,14 +45,13 @@
#if defined(CPU_COLDFIRE)
static inline int32_t MULT16_32_Q15(int32_t a, int32_t b)
{
asm volatile ("lsl.l #8, %[a];"
"lsl.l #8, %[a];"
"mac.l %[a], %[b], %%acc0;"
"movclr.l %%acc0, %[a];"
: [a] "+d" (a)
: [b] "d" (b)
int32_t r;
asm volatile ("mac.l %[a], %[b], %%acc0;"
"movclr.l %%acc0, %[r];"
: [r] "=r" (r)
: [a] "r" (a<<16), [b] "r" (b)
: "cc");
return a;
return r;
}
#elif defined(CPU_ARM)