omxVCM4P10_TransformDequantChromaDCFromPair_s.S revision 22e06318d04074d1a7c90caa173857abdcfd153e 
1/*
2 * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
3 *
4 */
5
6    .eabi_attribute 24, 1
7    .eabi_attribute 25, 1
8
9    .arm
10    .fpu neon
11    .text
12
13    .global omxVCM4P10_TransformDequantChromaDCFromPair
14    .func   omxVCM4P10_TransformDequantChromaDCFromPair
15omxVCM4P10_TransformDequantChromaDCFromPair:
16    push    {r4-r10, lr}
17    ldr     r9, [r0,#0]
18    vmov.i16    d0, #0
19    mov     r8, #0x1f
20    vst1.16    {d0}, [r1]
21    ldrb    r6, [r9], #1
22unpackLoop:
23    tst     r6, #0x10
24    ldrnesb r5, [r9, #1]
25    ldrneb  r4, [r9], #2
26    and     r7, r8, r6, lsl #1
27    ldreqsb r4, [r9], #1
28    orrne   r4, r4, r5, lsl #8
29    tst     r6, #0x20
30    ldreqb  r6, [r9], #1
31    strh    r4, [r1, r7]
32    beq     unpackLoop
33    ldmia   r1, {r3, r4}
34    str     r9, [r0, #0]
35    ldr     r5, .LarmVCM4P10_QPDivTable
36P0: add     r5, pc
37    ldr     r6, .LarmVCM4P10_VMatrixQPModTable
38P1: add     r6, pc
39    saddsubx        r3, r3, r3
40    saddsubx        r4, r4, r4
41    ldrsb   r9, [r5, r2]
42    ldrsb   r2, [r6, r2]
43    sadd16  r5, r3, r4
44    ssub16  r6, r3, r4
45    lsl     r2, r2, r9
46    vmov    d0, r5, r6
47    vrev32.16  d0, d0
48    vdup.16    d1, r2
49    vmull.s16   q1, d0, d1
50    vshrn.i32   d2, q1, #1
51    vst1.16    {d2}, [r1]
52    mov     r0, #0
53    pop     {r4-r10, pc}
54    .endfunc
55
56.LarmVCM4P10_QPDivTable:
57    .word armVCM4P10_QPDivTable-(P0+8)
58.LarmVCM4P10_VMatrixQPModTable:
59    .word armVCM4P10_VMatrixQPModTable-(P1+8)
60
61    .end
62