diff options
| author | Janne Grunau <janne-libav@jannau.net> | 2014-04-20 17:57:36 +0200 |
|---|---|---|
| committer | Janne Grunau <janne-libav@jannau.net> | 2014-04-22 22:01:45 +0200 |
| commit | 3956a5e0ea46ed7e27ca888fe11c47986ad99261 (patch) | |
| tree | e3860b82f58d0efe1524ecc9ac2070d4a9a42874 /libavcodec/aarch64/vorbisdsp_neon.S | |
| parent | 8f9fe6ae3461ce270bce6b7083fda5ec314cdad4 (diff) | |
aarch64: NEON vorbis_inverse_coupling
From the ARMv7 NEON version. 16 times faster as the C version, overall
more than 12% faster vorbis decoding on Apple's A7.
Diffstat (limited to 'libavcodec/aarch64/vorbisdsp_neon.S')
| -rw-r--r-- | libavcodec/aarch64/vorbisdsp_neon.S | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/libavcodec/aarch64/vorbisdsp_neon.S b/libavcodec/aarch64/vorbisdsp_neon.S new file mode 100644 index 0000000000..11f71f1d89 --- /dev/null +++ b/libavcodec/aarch64/vorbisdsp_neon.S @@ -0,0 +1,82 @@ +/* + * Copyright (c) 2008 Mans Rullgard <mans@mansr.com> + * + * This file is part of Libav. + * + * Libav is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * Libav is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/aarch64/asm.S" + +function ff_vorbis_inverse_coupling_neon, export=1 + movi v20.4s, #1<<7, lsl #24 + subs x2, x2, #4 + mov x3, x0 + mov x4, x1 + b.eq 3f + + ld1 {v7.4s}, [x1], #16 + ld1 {v6.4s}, [x0], #16 + cmle v4.4s, v7.4s, #0 + and v5.16b, v6.16b, v20.16b + eor v7.16b, v7.16b, v5.16b + and v2.16b, v7.16b, v4.16b + bic v3.16b, v7.16b, v4.16b + fadd v7.4s, v6.4s, v2.4s + fsub v6.4s, v6.4s, v3.4s +1: ld1 {v1.4s}, [x1], #16 + ld1 {v0.4s}, [x0], #16 + cmle v4.4s, v1.4s, #0 + and v5.16b, v0.16b, v20.16b + eor v1.16b, v1.16b, v5.16b + st1 {v7.4s}, [x3], #16 + st1 {v6.4s}, [x4], #16 + and v2.16b, v1.16b, v4.16b + bic v3.16b, v1.16b, v4.16b + fadd v1.4s, v0.4s, v2.4s + fsub v0.4s, v0.4s, v3.4s + subs x2, x2, #8 + b.le 2f + ld1 {v7.4s}, [x1], #16 + ld1 {v6.4s}, [x0], #16 + cmle v4.4s, v7.4s, #0 + and v5.16b, v6.16b, v20.16b + eor v7.16b, v7.16b, v5.16b + st1 {v1.4s}, [x3], #16 + st1 {v0.4s}, [x4], #16 + and v2.16b, v7.16b, v4.16b + bic v3.16b, v7.16b, v4.16b + fadd v7.4s, v6.4s, v2.4s + fsub v6.4s, v6.4s, v3.4s + b 1b + +2: st1 {v1.4s}, [x3], #16 + st1 {v0.4s}, [x4], #16 + b.lt ret + +3: ld1 {v1.4s}, [x1] + ld1 {v0.4s}, [x0] + cmle v4.4s, v1.4s, #0 + and v5.16b, v0.16b, v20.16b + eor v1.16b, v1.16b, v5.16b + and v2.16b, v1.16b, v4.16b + bic v3.16b, v1.16b, v4.16b + fadd v1.4s, v0.4s, v2.4s + fsub v0.4s, v0.4s, v3.4s + st1 {v1.4s}, [x0], #16 + st1 {v0.4s}, [x1], #16 +ret: + ret +endfunc |