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opus: asm MULT16_32_Q15 for arm and cf

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Speeds up decoding of a 64kbps opus test file by 34MHz on h300 (cf),
24MHz on c200 (pp) and 13MHz on fuzev1 (amsv1)

Change-Id: I0dce6b3bfe6c81d0a722dfebb13891b9a428c6ba
This commit is contained in:
Nils Wallménius 2012-09-24 23:14:58 +02:00
parent 06fc6fdd0a
commit afc6b3f021
2 changed files with 33 additions and 0 deletions
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27
lib/rbcodec/codecs/libopus/celt/fixed_generic.h
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@ -42,8 +42,35 @@
/** 16x32 multiplication, followed by a 16-bit shift right (round-to-nearest). Results fits in 32 bits */
#define MULT16_32_P16(a,b) ADD32(MULT16_16((a),SHR((b),16)), PSHR(MULT16_16((a),((b)&0x0000ffff)),16))
#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)
: "cc");
return a;
}
#elif defined(CPU_ARM)
static inline int32_t MULT16_32_Q15(int32_t a, int32_t b)
{
int32_t lo, hi;
asm volatile("smull %[lo], %[hi], %[a], %[b] \n\t"
"mov %[lo], %[lo], lsr #15 \n\t"
"orr %[hi], %[lo], %[hi], lsl #17 \n\t"
: [lo] "=&r" (lo), [hi] "=&r" (hi)
: [a] "r" (a), [b] "r" (b) );
return(hi);
}
#else
/** 16x32 multiplication, followed by a 15-bit shift right. Results fits in 32 bits */
#define MULT16_32_Q15(a,b) ADD32(SHL(MULT16_16((a),SHR((b),16)),1), SHR(MULT16_16SU((a),((b)&0x0000ffff)),15))
#endif
/** 32x32 multiplication, followed by a 31-bit shift right. Results fits in 32 bits */
#define MULT32_32_Q31(a,b) ADD32(ADD32(SHL(MULT16_16(SHR((a),16),SHR((b),16)),1), SHR(MULT16_16SU(SHR((a),16),((b)&0x0000ffff)),15)), SHR(MULT16_16SU(SHR((b),16),((a)&0x0000ffff)),15))