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51 lines
1.8 KiB
ArmAsm
51 lines
1.8 KiB
ArmAsm
/*
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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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