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/*
* (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
*
*/
.eabi_attribute 24, 1
.eabi_attribute 25, 1
.arm
.fpu neon
.text
.global omxVCM4P10_TransformDequantChromaDCFromPair
.func omxVCM4P10_TransformDequantChromaDCFromPair
omxVCM4P10_TransformDequantChromaDCFromPair:
push {r4-r10, lr}
ldr r9, [r0,#0]
vmov.i16 d0, #0
mov r8, #0x1f
vst1.16 {d0}, [r1]
ldrb r6, [r9], #1
unpackLoop:
tst r6, #0x10
ldrnesb r5, [r9, #1]
ldrneb r4, [r9], #2
and r7, r8, r6, lsl #1
ldreqsb r4, [r9], #1
orrne r4, r4, r5, lsl #8
tst r6, #0x20
ldreqb r6, [r9], #1
strh r4, [r1, r7]
beq unpackLoop
ldmia r1, {r3, r4}
str r9, [r0, #0]
ldr r5, =armVCM4P10_QPDivTable
ldr r6, =armVCM4P10_VMatrixQPModTable
saddsubx r3, r3, r3
saddsubx r4, r4, r4
ldrsb r9, [r5, r2]
ldrsb r2, [r6, r2]
sadd16 r5, r3, r4
ssub16 r6, r3, r4
lsl r2, r2, r9
vmov d0, r5, r6
vrev32.16 d0, d0
vdup.16 d1, r2
vmull.s16 q1, d0, d1
vshrn.i32 d2, q1, #1
vst1.16 {d2}, [r1]
mov r0, #0
pop {r4-r10, pc}
.endfunc
.end
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