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e0604d508e
This allows speeding up format conversions from yuv420 to nv12.
Cortex A53 A72 A73
interleave_bytes_c: 86077.5 51433.0 66972.0
interleave_bytes_neon: 19701.7 23019.2 15859.2
interleave_bytes_aligned_c: 86603.0 52017.2 67484.2
interleave_bytes_aligned_neon: 9061.0 7623.0 6309.0
Signed-off-by: Martin Storsjö <martin@martin.st>
80 lines
2.5 KiB
ArmAsm
80 lines
2.5 KiB
ArmAsm
/*
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* Copyright (c) 2020 Martin Storsjo
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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/aarch64/asm.S"
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// void ff_interleave_bytes_neon(const uint8_t *src1, const uint8_t *src2,
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// uint8_t *dest, int width, int height,
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// int src1Stride, int src2Stride, int dstStride);
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function ff_interleave_bytes_neon, export=1
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sub w5, w5, w3
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sub w6, w6, w3
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sub w7, w7, w3, lsl #1
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1:
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ands w8, w3, #0xfffffff0 // & ~15
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b.eq 3f
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2:
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ld1 {v0.16b}, [x0], #16
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ld1 {v1.16b}, [x1], #16
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subs w8, w8, #16
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st2 {v0.16b, v1.16b}, [x2], #32
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b.gt 2b
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tst w3, #15
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b.eq 9f
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3:
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tst w3, #8
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b.eq 4f
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ld1 {v0.8b}, [x0], #8
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ld1 {v1.8b}, [x1], #8
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st2 {v0.8b, v1.8b}, [x2], #16
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4:
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tst w3, #4
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b.eq 5f
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ld1 {v0.s}[0], [x0], #4
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ld1 {v1.s}[0], [x1], #4
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zip1 v0.8b, v0.8b, v1.8b
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st1 {v0.8b}, [x2], #8
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5:
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ands w8, w3, #3
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b.eq 9f
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6:
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ldrb w9, [x0], #1
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ldrb w10, [x1], #1
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subs w8, w8, #1
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bfi w9, w10, #8, #8
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strh w9, [x2], #2
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b.gt 6b
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9:
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subs w4, w4, #1
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b.eq 0f
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add x0, x0, w5, sxtw
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add x1, x1, w6, sxtw
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add x2, x2, w7, sxtw
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b 1b
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0:
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ret
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endfunc
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