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| author | Mans Rullgard <mans@mansr.com> | 2011-09-29 22:03:40 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2011-10-22 20:28:45 +0200 |
| commit | d4999e0a798cc82db212be67d9edb22f0a7e5847 (patch) | |
| tree | a13e91f4f2e63b432ade824622aa8ddf6dac251b /libavcodec/arm | |
| parent | ab2539708a241ddb2190d95d68a86b71b0bec601 (diff) | |
| download | ffmpeg-d4999e0a798cc82db212be67d9edb22f0a7e5847.tar.gz | |
dca: ARMv6 optimised decode_blockcode()
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit 08e3dea3f7f69309574dafc0af6671615e909720)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/arm')
| -rw-r--r-- | libavcodec/arm/dca.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/libavcodec/arm/dca.h b/libavcodec/arm/dca.h index 38c8d1f9cc..e85b82c1bd 100644 --- a/libavcodec/arm/dca.h +++ b/libavcodec/arm/dca.h @@ -23,6 +23,45 @@ #include <stdint.h> #include "config.h" +#include "libavutil/intmath.h" + +#if HAVE_ARMV6 && HAVE_INLINE_ASM + +#define decode_blockcode decode_blockcode +static inline int decode_blockcode(int code, int levels, int *values) +{ + int v0, v1, v2, v3; + + __asm__ ("smmul %4, %8, %11 \n" + "smlabb %8, %4, %10, %8 \n" + "smmul %5, %4, %11 \n" + "sub %8, %8, %9, lsr #1 \n" + "smlabb %4, %5, %10, %4 \n" + "smmul %6, %5, %11 \n" + "str %8, %0 \n" + "sub %4, %4, %9, lsr #1 \n" + "smlabb %5, %6, %10, %5 \n" + "smmul %7, %6, %11 \n" + "str %4, %1 \n" + "sub %5, %5, %9, lsr #1 \n" + "smlabb %6, %7, %10, %6 \n" + "cmp %7, #0 \n" + "str %5, %2 \n" + "sub %6, %6, %9, lsr #1 \n" + "it eq \n" + "mvneq %7, #0 \n" + "str %6, %3 \n" + : "=m"(values[0]), "=m"(values[1]), + "=m"(values[2]), "=m"(values[3]), + "=&r"(v0), "=&r"(v1), "=&r"(v2), "=&r"(v3), + "+&r"(code) + : "r"(levels - 1), "r"(-levels), "r"(ff_inverse[levels]) + : "cc"); + + return v3; +} + +#endif #if HAVE_NEON && HAVE_INLINE_ASM && HAVE_ASM_MOD_Y |