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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
@* ihevc_intra_pred_luma_mode_18_34_neon.s
@*
@* @brief
@* contains function definitions for intra prediction dc filtering.
@* functions are coded using neon intrinsics and can be compiled using
@* rvct
@*
@* @author
@* yogeswaran rs
@*
@* @par list of functions:
@*
@*
@* @remarks
@* none
@*
@*******************************************************************************
@*/
@/**
@*******************************************************************************
@*
@* @brief
@* luma intraprediction filter for dc input
@*
@* @par description:
@*
@* @param[in] pu1_ref
@* uword8 pointer to the source
@*
@* @param[out] pu1_dst
@* uword8 pointer to the destination
@*
@* @param[in] src_strd
@* integer source stride
@*
@* @param[in] dst_strd
@* integer destination stride
@*
@* @param[in] pi1_coeff
@* word8 pointer to the planar coefficients
@*
@* @param[in] nt
@* size of tranform block
@*
@* @param[in] mode
@* type of filtering
@*
@* @returns
@*
@* @remarks
@* none
@*
@*******************************************************************************
@*/
@void ihevc_intra_pred_chroma_mode_18_34(uword8 *pu1_ref,
@ word32 src_strd,
@ uword8 *pu1_dst,
@ word32 dst_strd,
@ word32 nt,
@ word32 mode)
@
@**************variables vs registers*****************************************
@r0 => *pu1_ref
@r1 => src_strd
@r2 => *pu1_dst
@r3 => dst_strd
@stack contents from #40
@ nt
@ mode
@ pi1_coeff
.text
.align 4
.globl ihevc_intra_pred_chroma_mode_18_34_a9q
.type ihevc_intra_pred_chroma_mode_18_34_a9q, %function
ihevc_intra_pred_chroma_mode_18_34_a9q:
stmfd sp!, {r4-r12, r14} @stack stores the values of the arguments
ldr r4,[sp,#40]
ldr r5,[sp,#44]
cmp r4,#4
beq mode2_4
mov r12,r4
mov r11,r4
add r0,r0,r4,lsl #2
cmp r5,#0x22
mov r10,r2
add r0,r0,#4
subne r0,r0,#4
moveq r6,#2
movne r6,#-2
mov r8,r0
kernel:
vld1.8 {d0,d1},[r8],r6
vst1.8 {d0,d1},[r10],r3
vld1.8 {d2,d3},[r8],r6
vst1.8 {d2,d3},[r10],r3
vld1.8 {d4,d5},[r8],r6
vst1.8 {d4,d5},[r10],r3
vld1.8 {d6,d7},[r8],r6
vst1.8 {d6,d7},[r10],r3
vld1.8 {d8,d9},[r8],r6
vst1.8 {d8,d9},[r10],r3
vld1.8 {d10,d11},[r8],r6
vst1.8 {d10,d11},[r10],r3
vld1.8 {d12,d13},[r8],r6
vst1.8 {d12,d13},[r10],r3
vld1.8 {d14,d15},[r8],r6
vst1.8 {d14,d15},[r10],r3
subs r12,r12,#8
bne kernel
cmp r11,#16
add r8,r0,#16
add r10,r2,#16
sub r11,#16
mov r12,#16
beq kernel
b end_func
mode2_4:
add r0,r0,#20
cmp r5,#0x22
subne r0,r0,#4
moveq r8,#2
movne r8,#-2
vld1.8 {d0},[r0],r8
vst1.32 {d0},[r2],r3
vld1.8 {d0},[r0],r8
vst1.32 {d0},[r2],r3
vld1.8 {d0},[r0],r8
vst1.32 {d0},[r2],r3
vld1.8 {d0},[r0],r8
vst1.32 {d0},[r2],r3
end_func:
ldmfd sp!,{r4-r12,r15} @reload the registers from sp
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