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@/*****************************************************************************
@*
@* Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore
@*
@* Licensed under the Apache License, Version 2.0 (the "License");
@* you may not use this file except in compliance with the License.
@* You may obtain a copy of the License at:
@*
@* http://www.apache.org/licenses/LICENSE-2.0
@*
@* Unless required by applicable law or agreed to in writing, software
@* distributed under the License is distributed on an "AS IS" BASIS,
@* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@* See the License for the specific language governing permissions and
@* limitations under the License.
@*
@*****************************************************************************/
@/**
@/*******************************************************************************
@* @file
@* ihevcd_itrans_recon_dc_chroma.s
@*
@* @brief
@* contains function definitions itrans and recon for dc only case
@*
@* @author
@* ittiam
@*
@* @par list of functions:
@*
@*
@* @remarks
@* none
@*
@*******************************************************************************/
.text
.globl ihevcd_itrans_recon_dc_chroma_a9q
.type ihevcd_itrans_recon_dc_chroma_a9q, %function
ihevcd_itrans_recon_dc_chroma_a9q:
@void ihevcd_itrans_recon_dc_chroma(uword8 *pu1_pred,
@ uword8 *pu1_dst,
@ word32 pred_strd,
@ word32 dst_strd,
@ word32 log2_trans_size,
@ word16 i2_coeff_value)
@r0:pu1_pred
@r1:pu1_dest
@r2:pred_strd
@r3:dst_strd
push {r0-r11,lr}
ldr r4,[sp,#0x34] @loads log2_trans_size
ldr r5,[sp,#0x38] @ loads i2_coeff_value
mov r10,#1
lsl r4,r10,r4 @ trans_size = (1 << log2_trans_size)@
mov r6,#64 @ 1 << (shift1 - 1)@
mov r7,#2048 @ 1<<(shift2-1)
add r8,r6,r5,lsl #6
ssat r8,#16,r8,asr #7
add r5,r7,r8,lsl #6
ssat r6,#16,r5,asr #12
mov r9,r4
mov r8,r4
@ r6 has the dc_value
@ r4 has the trans_size value
@ r8 has the row value
@ r9 has the col value
vdup.s16 q0,r6
cmp r4,#4
beq row_loop_4chroma
row_loop_chroma:
mov r9,r4
col_loop_chroma:
mov r7,r0
vld2.8 {d2,d3},[r7],r2
vld2.8 {d4,d5},[r7],r2
vld2.8 {d6,d7},[r7],r2
vld2.8 {d8,d9},[r7],r2
vld2.8 {d10,d11},[r7],r2
vld2.8 {d12,d13},[r7],r2
vld2.8 {d14,d15},[r7],r2
vld2.8 {d16,d17},[r7]
add r0,r0,#16
vaddw.u8 q15,q0,d2
vaddw.u8 q14,q0,d4
vaddw.u8 q13,q0,d6
vaddw.u8 q12,q0,d8
vaddw.u8 q11,q0,d10
vaddw.u8 q10,q0,d12
vaddw.u8 q9,q0,d14
mov r11,r1
vqmovun.s16 d2,q15
vqmovun.s16 d4,q14
vqmovun.s16 d6,q13
vqmovun.s16 d8,q12
vaddw.u8 q15,q0,d16
vqmovun.s16 d10,q11
vqmovun.s16 d12,q10
vqmovun.s16 d14,q9
vqmovun.s16 d16,q15
vst2.8 {d2,d3},[r11],r3
vst2.8 {d4,d5},[r11],r3
vst2.8 {d6,d7},[r11],r3
vst2.8 {d8,d9},[r11],r3
vst2.8 {d10,d11},[r11],r3
vst2.8 {d12,d13},[r11],r3
vst2.8 {d14,d15},[r11],r3
vst2.8 {d16,d17},[r11]
add r1,r1,#16
subs r9,r9,#8
bgt col_loop_chroma
subs r8,r8,#8
add r0,r0,r2,lsl #3
add r1,r1,r3,lsl #3
sub r0,r0,r4,lsl #1
sub r1,r1,r4,lsl #1
bgt row_loop_chroma
b end_loops_chroma
row_loop_4chroma:
mov r9,r10
col_loop_4chroma:
vld2.8 {d2,d3},[r0],r2
vld2.8 {d4,d5},[r0],r2
vld2.8 {d6,d7},[r0],r2
vld2.8 {d8,d9},[r0]
vaddw.u8 q15,q0,d2
vaddw.u8 q14,q0,d4
vaddw.u8 q13,q0,d6
vaddw.u8 q12,q0,d8
vqmovun.s16 d2,q15
vqmovun.s16 d4,q14
vqmovun.s16 d6,q13
vqmovun.s16 d8,q12
vzip.8 d2,d3
vzip.8 d4,d5
vzip.8 d6,d7
vzip.8 d8,d9
vst1.u32 {d2},[r1],r3
vst1.u32 {d4},[r1],r3
vst1.u32 {d6},[r1],r3
vst1.u32 {d8},[r1]
end_loops_chroma:
pop {r0-r11,pc}
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