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| author | Mans Rullgard <mans@mansr.com> | 2011-03-12 22:17:14 +0000 |
|---|---|---|
| committer | Mans Rullgard <mans@mansr.com> | 2011-04-05 01:11:16 +0100 |
| commit | 5f2e6c0fd11f34ba7cd013a0b22d7bd0d60613b8 (patch) | |
| tree | 6b1bc81fce4d5816756894a133a41472a90326f9 /libavcodec/arm/ac3dsp_neon.S | |
| parent | 2310ee4b1cca48609d06774b7c3c70a5f38f3473 (diff) | |
| download | ffmpeg-5f2e6c0fd11f34ba7cd013a0b22d7bd0d60613b8.tar.gz | |
ac3enc: NEON optimised extract_exponents
Signed-off-by: Mans Rullgard <mans@mansr.com>
Diffstat (limited to 'libavcodec/arm/ac3dsp_neon.S')
| -rw-r--r-- | libavcodec/arm/ac3dsp_neon.S | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/libavcodec/arm/ac3dsp_neon.S b/libavcodec/arm/ac3dsp_neon.S index d33d978d7c..946b39f25b 100644 --- a/libavcodec/arm/ac3dsp_neon.S +++ b/libavcodec/arm/ac3dsp_neon.S @@ -92,3 +92,23 @@ function ff_float_to_fixed24_neon, export=1 bgt 1b bx lr endfunc + +function ff_ac3_extract_exponents_neon, export=1 + vmov.i32 q14, #24 + vmov.i32 q15, #8 +1: + vld1.32 {q0}, [r1,:128] + vabs.s32 q1, q0 + vclz.i32 q3, q1 + vsub.i32 q3, q3, q15 + vcge.s32 q2, q3, q14 + vbit q3, q14, q2 + vbic q0, q0, q2 + vmovn.i32 d6, q3 + vmovn.i16 d6, q3 + vst1.32 {q0}, [r1,:128]! + vst1.32 {d6[0]}, [r0,:32]! + subs r2, r2, #4 + bgt 1b + bx lr +endfunc |