modules/arm_neon/yuyv_i422.S

   1  @*****************************************************************************
   2  @ yuyv_i422.S : ARM NEONv1 packed to planar YUV422 conversion
   3  @*****************************************************************************
   4  @ Copyright (C) 2011 Rémi Denis-Courmont
   5  @
   6  @ This program is free software; you can redistribute it and/or modify
   7  @ it under the terms of the GNU Lesser General Public License as published by
   8  @ the Free Software Foundation; either version 2.1 of the License, or
   9  @ (at your option) any later version.
  10  @
  11  @ This program is distributed in the hope that it will be useful,
  12  @ but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  @ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  @ GNU Lesser General Public License for more details.
  15  @
  16  @ You should have received a copy of the GNU Lesser General Public License
  17  @ along with this program; if not, write to the Free Software Foundation,
  18  @ Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  @****************************************************************************/
  20
  21         .syntax unified
  22         .fpu neon
  23         .text
  24
  25 #define I       r0
  26 #define IPAD    r1
  27 #define WIDTH   r2
  28 #define HEIGHT  r3
  29 #define Y       r4
  30 #define U       r5
  31 #define V       r6
  32 #define COUNT   ip
  33 #define YPAD    lr
  34
  35         .align 2
  36         .global yuyv_i422_neon
  37         .type   yuyv_i422_neon, %function
  38 yuyv_i422_neon:
  39         push            {r4-r6,lr}
  40         ldmia           r0,     {Y, U, V, YPAD}
  41         ldmia           r1,     {I, IPAD}
  42         cmp             HEIGHT, #0
  43         sub             YPAD,   YPAD,   WIDTH
  44         sub             IPAD,   IPAD,   WIDTH,  lsl #1
  45 1:
  46         movsgt          COUNT,  WIDTH
  47         pople           {r4-r6,pc}
  48 2:
  49         pld             [I, #64]
  50         subs            COUNT,  COUNT,  #16
  51         vld1.u8         {q0-q1},        [I,:128]!
  52         vuzp.u8         q0,     q1
  53         @ TODO: unroll (1 cycle stall)
  54         vuzp.u8         d2,     d3
  55         vst1.u8         {q0},           [Y,:128]!
  56         vst1.u8         {d2},           [U,:64]!
  57         vst1.u8         {d3},           [V,:64]!
  58         bgt             2b
  59
  60         subs            HEIGHT, #1
  61         add             I,      I,      IPAD
  62         add             Y,      Y,      YPAD
  63         add             U,      U,      YPAD,   lsr #1
  64         add             V,      V,      YPAD,   lsr #1
  65         b               1b
  66
  67         .global uyvy_i422_neon
  68         .type   uyvy_i422_neon, %function
  69 uyvy_i422_neon:
  70         push            {r4-r6,lr}
  71         ldmia           r0,     {Y, U, V, YPAD}
  72         ldmia           r1,     {I, IPAD}
  73         cmp             HEIGHT, #0
  74         sub             YPAD,   YPAD,   WIDTH
  75         sub             IPAD,   IPAD,   WIDTH,  lsl #1
  76 1:
  77         movsgt          COUNT,  WIDTH
  78         pople           {r4-r6,pc}
  79 2:
  80         pld             [I, #64]
  81         subs            COUNT,  COUNT,  #16
  82         vld1.u8         {q0-q1},        [I,:128]!
  83         vuzp.u8         q0,     q1
  84         vuzp.u8         d0,     d1
  85         vst1.u8         {q1},           [Y,:128]!
  86         vst1.u8         {d0},           [U,:64]!
  87         vst1.u8         {d1},           [V,:64]!
  88         bgt             2b
  89
  90         subs            HEIGHT, #1
  91         add             I,      I,      IPAD
  92         add             Y,      Y,      YPAD
  93         add             U,      U,      YPAD,   lsr #1
  94         add             V,      V,      YPAD,   lsr #1
  95         b               1b