omxVCM4P10_TransformDequantChromaDCFromPair_s.S revision 7ea582e1dbdd9a88b2105fbe29ed0ec92cbf70c6 
1/*
2 * Copyright (C) 2007-2008 ARM Limited
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *
16 */
17/*
18 *
19 */
20
21    .eabi_attribute 24, 1
22    .eabi_attribute 25, 1
23
24    .arm
25    .fpu neon
26    .text
27    .syntax unified
28
29    .global omxVCM4P10_TransformDequantChromaDCFromPair
30omxVCM4P10_TransformDequantChromaDCFromPair:
31    push    {r4-r10, lr}
32    ldr     r9, [r0,#0]
33    vmov.i16    d0, #0
34    mov     r8, #0x1f
35    vst1.16    {d0}, [r1]
36    ldrb    r6, [r9], #1
37unpackLoop:
38    tst     r6, #0x10
39    ldrsbne r5, [r9, #1]
40    ldrbne  r4, [r9], #2
41    and     r7, r8, r6, lsl #1
42    ldrsbeq r4, [r9], #1
43    orrne   r4, r4, r5, lsl #8
44    tst     r6, #0x20
45    ldrbeq  r6, [r9], #1
46    strh    r4, [r1, r7]
47    beq     unpackLoop
48    ldmia   r1, {r3, r4}
49    str     r9, [r0, #0]
50    ldr     r5, .LarmVCM4P10_QPDivTable
51P0: add     r5, pc
52    ldr     r6, .LarmVCM4P10_VMatrixQPModTable
53P1: add     r6, pc
54    saddsubx        r3, r3, r3
55    saddsubx        r4, r4, r4
56    ldrsb   r9, [r5, r2]
57    ldrsb   r2, [r6, r2]
58    sadd16  r5, r3, r4
59    ssub16  r6, r3, r4
60    lsl     r2, r2, r9
61    vmov    d0, r5, r6
62    vrev32.16  d0, d0
63    vdup.16    d1, r2
64    vmull.s16   q1, d0, d1
65    vshrn.i32   d2, q1, #1
66    vst1.16    {d2}, [r1]
67    mov     r0, #0
68    pop     {r4-r10, pc}
69
70.LarmVCM4P10_QPDivTable:
71    .word armVCM4P10_QPDivTable-(P0+8)
72.LarmVCM4P10_VMatrixQPModTable:
73    .word armVCM4P10_VMatrixQPModTable-(P1+8)
74
75    .end
76