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| author | Nils Wallménius <nils@rockbox.org> | 2012-09-26 11:21:25 +0200 |
|---|---|---|
| committer | Nils Wallménius <nils@rockbox.org> | 2012-09-26 11:21:25 +0200 |
| commit | 425725edb087bc606bfe4ca4fe9e26008ef49b6a (patch) | |
| tree | 4e3d54d16c1d861ed6092fe3fe91016b4a398673 | |
| parent | 5f60590e807dab79e46efa29b62a5d64e56f3451 (diff) | |
| download | rockbox-425725edb087bc606bfe4ca4fe9e26008ef49b6a.tar.gz rockbox-425725edb087bc606bfe4ca4fe9e26008ef49b6a.zip | |
opus: improve cf MULT16_32_Q15 by giving the compiler more freedom
saves about 3MHz when decoding a 64kbps test file
Change-Id: I10f47173ccb78e60e364662220d1db2f78dd5fdd
| -rw-r--r-- | lib/rbcodec/codecs/libopus/celt/fixed_generic.h | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/lib/rbcodec/codecs/libopus/celt/fixed_generic.h b/lib/rbcodec/codecs/libopus/celt/fixed_generic.h index d2271e7972..bc6820fa21 100644 --- a/lib/rbcodec/codecs/libopus/celt/fixed_generic.h +++ b/lib/rbcodec/codecs/libopus/celt/fixed_generic.h | |||
| @@ -45,14 +45,13 @@ | |||
| 45 | #if defined(CPU_COLDFIRE) | 45 | #if defined(CPU_COLDFIRE) |
| 46 | static inline int32_t MULT16_32_Q15(int32_t a, int32_t b) | 46 | static inline int32_t MULT16_32_Q15(int32_t a, int32_t b) |
| 47 | { | 47 | { |
| 48 | asm volatile ("lsl.l #8, %[a];" | 48 | int32_t r; |
| 49 | "lsl.l #8, %[a];" | 49 | asm volatile ("mac.l %[a], %[b], %%acc0;" |
| 50 | "mac.l %[a], %[b], %%acc0;" | 50 | "movclr.l %%acc0, %[r];" |
| 51 | "movclr.l %%acc0, %[a];" | 51 | : [r] "=r" (r) |
| 52 | : [a] "+d" (a) | 52 | : [a] "r" (a<<16), [b] "r" (b) |
| 53 | : [b] "d" (b) | ||
| 54 | : "cc"); | 53 | : "cc"); |
| 55 | return a; | 54 | return r; |
| 56 | } | 55 | } |
| 57 | 56 | ||
| 58 | #elif defined(CPU_ARM) | 57 | #elif defined(CPU_ARM) |