diff options
| author | Mans Rullgard <mans@mansr.com> | 2012-09-09 19:25:43 +0100 |
|---|---|---|
| committer | Mans Rullgard <mans@mansr.com> | 2012-09-13 19:15:42 +0100 |
| commit | 643b5b794f095a1d679568a3a6b3106a1dfd6cdb (patch) | |
| tree | 23e3e93ab7fcac1ffbd61373cca38195ab5db381 /libavresample/arm/audio_convert_neon.S | |
| parent | ca6b544ac9d07dcd4d151d5729f0bf52f4f8653d (diff) | |
ARM: libavresample: NEON optimised flat float to s16 conversion
Signed-off-by: Mans Rullgard <mans@mansr.com>
Diffstat (limited to 'libavresample/arm/audio_convert_neon.S')
| -rw-r--r-- | libavresample/arm/audio_convert_neon.S | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/libavresample/arm/audio_convert_neon.S b/libavresample/arm/audio_convert_neon.S new file mode 100644 index 0000000000..e82f8c633f --- /dev/null +++ b/libavresample/arm/audio_convert_neon.S @@ -0,0 +1,66 @@ +/* + * 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 "config.h" +#include "libavutil/arm/asm.S" + +function ff_conv_flt_to_s16_neon, export=1 + subs r2, r2, #8 + vld1.32 {q0}, [r1,:128]! + vcvt.s32.f32 q8, q0, #31 + vld1.32 {q1}, [r1,:128]! + vcvt.s32.f32 q9, q1, #31 + beq 3f + bics r12, r2, #15 + beq 2f +1: subs r12, r12, #16 + vqrshrn.s32 d4, q8, #16 + vld1.32 {q0}, [r1,:128]! + vcvt.s32.f32 q0, q0, #31 + vqrshrn.s32 d5, q9, #16 + vld1.32 {q1}, [r1,:128]! + vcvt.s32.f32 q1, q1, #31 + vqrshrn.s32 d6, q0, #16 + vst1.16 {q2}, [r0,:128]! + vqrshrn.s32 d7, q1, #16 + vld1.32 {q8}, [r1,:128]! + vcvt.s32.f32 q8, q8, #31 + vld1.32 {q9}, [r1,:128]! + vcvt.s32.f32 q9, q9, #31 + vst1.16 {q3}, [r0,:128]! + bne 1b + ands r2, r2, #15 + beq 3f +2: vld1.32 {q0}, [r1,:128]! + vqrshrn.s32 d4, q8, #16 + vcvt.s32.f32 q0, q0, #31 + vld1.32 {q1}, [r1,:128]! + vqrshrn.s32 d5, q9, #16 + vcvt.s32.f32 q1, q1, #31 + vqrshrn.s32 d6, q0, #16 + vst1.16 {q2}, [r0,:128]! + vqrshrn.s32 d7, q1, #16 + vst1.16 {q3}, [r0,:128]! + bx lr +3: vqrshrn.s32 d4, q8, #16 + vqrshrn.s32 d5, q9, #16 + vst1.16 {q2}, [r0,:128]! + bx lr +endfunc |