1;
2;  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
3;
4;  Use of this source code is governed by a BSD-style license
5;  that can be found in the LICENSE file in the root of the source
6;  tree. An additional intellectual property rights grant can be found
7;  in the file PATENTS.  All contributing project authors may
8;  be found in the AUTHORS file in the root of the source tree.
9;
10
11
12    EXPORT |vp8_memcpy_partial_neon|
13
14    ARM
15    REQUIRE8
16    PRESERVE8
17
18    AREA ||.text||, CODE, READONLY, ALIGN=2
19;=========================================
20;this is not a full memcpy function!!!
21;void vp8_memcpy_partial_neon(unsigned char *dst_ptr, unsigned char *src_ptr,
22;                             int sz);
23|vp8_memcpy_partial_neon| PROC
24    ;pld                [r1]                        ;preload pred data
25    ;pld                [r1, #128]
26    ;pld                [r1, #256]
27    ;pld                [r1, #384]
28
29    mov             r12, r2, lsr #8                 ;copy 256 bytes data at one time
30
31memcpy_neon_loop
32    vld1.8          {q0, q1}, [r1]!                 ;load src data
33    subs            r12, r12, #1
34    vld1.8          {q2, q3}, [r1]!
35    vst1.8          {q0, q1}, [r0]!                 ;copy to dst_ptr
36    vld1.8          {q4, q5}, [r1]!
37    vst1.8          {q2, q3}, [r0]!
38    vld1.8          {q6, q7}, [r1]!
39    vst1.8          {q4, q5}, [r0]!
40    vld1.8          {q8, q9}, [r1]!
41    vst1.8          {q6, q7}, [r0]!
42    vld1.8          {q10, q11}, [r1]!
43    vst1.8          {q8, q9}, [r0]!
44    vld1.8          {q12, q13}, [r1]!
45    vst1.8          {q10, q11}, [r0]!
46    vld1.8          {q14, q15}, [r1]!
47    vst1.8          {q12, q13}, [r0]!
48    vst1.8          {q14, q15}, [r0]!
49
50    ;pld                [r1]                        ;preload pred data -- need to adjust for real device
51    ;pld                [r1, #128]
52    ;pld                [r1, #256]
53    ;pld                [r1, #384]
54
55    bne             memcpy_neon_loop
56
57    ands            r3, r2, #0xff                   ;extra copy
58    beq             done_copy_neon_loop
59
60extra_copy_neon_loop
61    vld1.8          {q0}, [r1]!                 ;load src data
62    subs            r3, r3, #16
63    vst1.8          {q0}, [r0]!
64    bne             extra_copy_neon_loop
65
66done_copy_neon_loop
67    bx              lr
68    ENDP
69
70    END
71