/media/libvpx/vp8/encoder/arm/neon/vp8_memcpy_neon.asm

http://github.com/zpao/v8monkey · Assembly · 68 lines · 37 code · 12 blank · 19 comment · 0 complexity · 9ee0c1055164de3bfe818a8d116747cd MD5 · raw file 

    

  1. ;
    2. 

  2. ;  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
    3. 

  3. ;
    4. 

  4. ;  Use of this source code is governed by a BSD-style license
    5. 

  5. ;  that can be found in the LICENSE file in the root of the source
    6. 

  6. ;  tree. An additional intellectual property rights grant can be found
    7. 

  7. ;  in the file PATENTS.  All contributing project authors may
    8. 

  8. ;  be found in the AUTHORS file in the root of the source tree.
    9. 

  9. ;
    10. 

  10. 

  11. 

  12.     EXPORT |vp8_memcpy_neon|
    13. 

  13. 

  14.     ARM
    15. 

  15.     REQUIRE8
    16. 

  16.     PRESERVE8
    17. 

  17. 

  18.     AREA ||.text||, CODE, READONLY, ALIGN=2
    19. 

  19. ;=========================================
    20. 

  20. ;void vp8_memcpy_neon(unsigned char *dst_ptr, unsigned char *src_ptr, int sz);
    21. 

  21. |vp8_memcpy_neon| PROC
    22. 

  22.     ;pld                [r1]                        ;preload pred data
    23. 

  23.     ;pld                [r1, #128]
    24. 

  24.     ;pld                [r1, #256]
    25. 

  25.     ;pld                [r1, #384]
    26. 

  26. 

  27.     mov             r12, r2, lsr #8                 ;copy 256 bytes data at one time
    28. 

  28. 

  29. memcpy_neon_loop
    30. 

  30.     vld1.8          {q0, q1}, [r1]!                 ;load src data
    31. 

  31.     subs            r12, r12, #1
    32. 

  32.     vld1.8          {q2, q3}, [r1]!
    33. 

  33.     vst1.8          {q0, q1}, [r0]!                 ;copy to dst_ptr
    34. 

  34.     vld1.8          {q4, q5}, [r1]!
    35. 

  35.     vst1.8          {q2, q3}, [r0]!
    36. 

  36.     vld1.8          {q6, q7}, [r1]!
    37. 

  37.     vst1.8          {q4, q5}, [r0]!
    38. 

  38.     vld1.8          {q8, q9}, [r1]!
    39. 

  39.     vst1.8          {q6, q7}, [r0]!
    40. 

  40.     vld1.8          {q10, q11}, [r1]!
    41. 

  41.     vst1.8          {q8, q9}, [r0]!
    42. 

  42.     vld1.8          {q12, q13}, [r1]!
    43. 

  43.     vst1.8          {q10, q11}, [r0]!
    44. 

  44.     vld1.8          {q14, q15}, [r1]!
    45. 

  45.     vst1.8          {q12, q13}, [r0]!
    46. 

  46.     vst1.8          {q14, q15}, [r0]!
    47. 

  47. 

  48.     ;pld                [r1]                        ;preload pred data -- need to adjust for real device
    49. 

  49.     ;pld                [r1, #128]
    50. 

  50.     ;pld                [r1, #256]
    51. 

  51.     ;pld                [r1, #384]
    52. 

  52. 

  53.     bne             memcpy_neon_loop
    54. 

  54. 

  55.     ands            r3, r2, #0xff                   ;extra copy
    56. 

  56.     beq             done_copy_neon_loop
    57. 

  57. 

  58. extra_copy_neon_loop
    59. 

  59.     vld1.8          {q0}, [r1]!                 ;load src data
    60. 

  60.     subs            r3, r3, #16
    61. 

  61.     vst1.8          {q0}, [r0]!
    62. 

  62.     bne             extra_copy_neon_loop
    63. 

  63. 

  64. done_copy_neon_loop
    65. 

  65.     bx              lr
    66. 

  66.     ENDP
    67. 

  67. 

  68.     END
    69.