| /* | |
| * ARM NEON optimised integer operations | |
| * Copyright (c) 2009 Konstantin Shishkov | |
| * | |
| * This file is part of FFmpeg. | |
| * | |
| * FFmpeg 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. | |
| * | |
| * FFmpeg 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 FFmpeg; if not, write to the Free Software | |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| */ | |
| #include "libavutil/arm/asm.S" | |
| function ff_scalarproduct_int16_neon, export=1 | |
| vmov.i16 q0, #0 | |
| vmov.i16 q1, #0 | |
| vmov.i16 q2, #0 | |
| vmov.i16 q3, #0 | |
| 1: vld1.16 {d16-d17}, [r0]! | |
| vld1.16 {d20-d21}, [r1,:128]! | |
| vmlal.s16 q0, d16, d20 | |
| vld1.16 {d18-d19}, [r0]! | |
| vmlal.s16 q1, d17, d21 | |
| vld1.16 {d22-d23}, [r1,:128]! | |
| vmlal.s16 q2, d18, d22 | |
| vmlal.s16 q3, d19, d23 | |
| subs r2, r2, #16 | |
| bgt 1b | |
| vpadd.s32 d16, d0, d1 | |
| vpadd.s32 d17, d2, d3 | |
| vpadd.s32 d18, d4, d5 | |
| vpadd.s32 d19, d6, d7 | |
| vpadd.s32 d0, d16, d17 | |
| vpadd.s32 d1, d18, d19 | |
| vpadd.s32 d2, d0, d1 | |
| vpaddl.s32 d3, d2 | |
| vmov.32 r0, d3[0] | |
| bx lr | |
| endfunc |