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50 lines
1.8 KiB
50 lines
1.8 KiB
/* |
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* ARM NEON optimised integer operations |
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* Copyright (c) 2009 Kostya Shishkov |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/arm/asm.S" |
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function ff_scalarproduct_int16_neon, export=1 |
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vmov.i16 q0, #0 |
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vmov.i16 q1, #0 |
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vmov.i16 q2, #0 |
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vmov.i16 q3, #0 |
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1: vld1.16 {d16-d17}, [r0]! |
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vld1.16 {d20-d21}, [r1,:128]! |
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vmlal.s16 q0, d16, d20 |
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vld1.16 {d18-d19}, [r0]! |
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vmlal.s16 q1, d17, d21 |
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vld1.16 {d22-d23}, [r1,:128]! |
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vmlal.s16 q2, d18, d22 |
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vmlal.s16 q3, d19, d23 |
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subs r2, r2, #16 |
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bne 1b |
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vpadd.s32 d16, d0, d1 |
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vpadd.s32 d17, d2, d3 |
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vpadd.s32 d18, d4, d5 |
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vpadd.s32 d19, d6, d7 |
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vpadd.s32 d0, d16, d17 |
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vpadd.s32 d1, d18, d19 |
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vpadd.s32 d2, d0, d1 |
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vpaddl.s32 d3, d2 |
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vmov.32 r0, d3[0] |
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bx lr |
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endfunc
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