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97 lines
2.3 KiB
97 lines
2.3 KiB
@*****************************************************************************
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@ yuyv_i422.S : ARM NEONv1 packed to planar YUV422 conversion
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@*****************************************************************************
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@ Copyright (C) 2011 Rémi Denis-Courmont
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@
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@ This program is free software; you can redistribute it and/or modify
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@ it under the terms of the GNU Lesser General Public License as published by
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@ the Free Software Foundation; either version 2.1 of the License, or
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@ (at your option) any later version.
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@
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@ This program 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
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@ GNU 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 License
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@ along with this program; if not, write to the Free Software Foundation,
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@ Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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@****************************************************************************/
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#include "asm.S"
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.syntax unified
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#if HAVE_AS_FPU_DIRECTIVE
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.fpu neon
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#endif
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.text
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#define I r0
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#define IPAD r1
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#define WIDTH r2
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#define HEIGHT r3
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#define Y r4
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#define U r5
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#define V r6
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#define COUNT ip
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#define YPAD lr
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.align 2
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function yuyv_i422_neon
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push {r4-r6,lr}
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ldmia r0, {Y, U, V, YPAD}
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ldmia r1, {I, IPAD}
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cmp HEIGHT, #0
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sub YPAD, YPAD, WIDTH
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sub IPAD, IPAD, WIDTH, lsl #1
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1:
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ite gt
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movsgt COUNT, WIDTH
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pople {r4-r6,pc}
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2:
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pld [I, #64]
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subs COUNT, COUNT, #16
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vld1.u8 {q0-q1}, [I,:128]!
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vuzp.u8 q0, q1
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@ TODO: unroll (1 cycle stall)
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vuzp.u8 d2, d3
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vst1.u8 {q0}, [Y,:128]!
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vst1.u8 {d2}, [U,:64]!
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vst1.u8 {d3}, [V,:64]!
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bgt 2b
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subs HEIGHT, #1
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add I, I, IPAD
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add Y, Y, YPAD
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add U, U, YPAD, lsr #1
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add V, V, YPAD, lsr #1
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b 1b
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function uyvy_i422_neon
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push {r4-r6,lr}
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ldmia r0, {Y, U, V, YPAD}
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ldmia r1, {I, IPAD}
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cmp HEIGHT, #0
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sub YPAD, YPAD, WIDTH
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sub IPAD, IPAD, WIDTH, lsl #1
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1:
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ite gt
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movsgt COUNT, WIDTH
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pople {r4-r6,pc}
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2:
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pld [I, #64]
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subs COUNT, COUNT, #16
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vld1.u8 {q0-q1}, [I,:128]!
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vuzp.u8 q0, q1
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vuzp.u8 d0, d1
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vst1.u8 {q1}, [Y,:128]!
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vst1.u8 {d0}, [U,:64]!
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vst1.u8 {d1}, [V,:64]!
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bgt 2b
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subs HEIGHT, #1
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add I, I, IPAD
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add Y, Y, YPAD
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add U, U, YPAD, lsr #1
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add V, V, YPAD, lsr #1
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b 1b
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