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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.
@*
@*****************************************************************************/
@/**
@/**
@*******************************************************************************
@*
@* @brief
@* interprediction luma function for copy
@*
@* @par description:
@* copies the array of width 'wd' and height 'ht' from the location pointed
@* by 'src' to the location pointed by 'dst'
@*
@* @param[in] pu1_src
@* 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 filter coefficients
@*
@* @param[in] ht
@* integer height of the array
@*
@* @param[in] wd
@* integer width of the array
@*
@* @returns
@*
@* @remarks
@* none
@*
@*******************************************************************************
@*/
@void ihevc_inter_pred_luma_copy (
@ uword8 *pu1_src,
@ uword8 *pu1_dst,
@ word32 src_strd,
@ word32 dst_strd,
@ word8 *pi1_coeff,
@ word32 ht,
@ word32 wd )
@**************variables vs registers*****************************************
@ r0 => *pu1_src
@ r1 => *pu1_dst
@ r2 => src_strd
@ r3 => dst_strd
@ r7 => ht
@ r12 => wd
.text
.align 4
.globl ihevc_inter_pred_luma_copy_a9q
.type ihevc_inter_pred_luma_copy_a9q, %function
ihevc_inter_pred_luma_copy_a9q:
stmfd sp!, {r4-r12, r14} @stack stores the values of the arguments
ldr r12,[sp,#48] @loads wd
ldr r7,[sp,#44] @loads ht
cmp r7,#0 @checks ht == 0
ble end_loops
tst r12,#15 @checks wd for multiples for 4 & 8
beq core_loop_wd_16
tst r12,#7 @checks wd for multiples for 4 & 8
beq core_loop_wd_8
sub r11,r12,#4
outer_loop_wd_4:
subs r4,r12,#0 @checks wd == 0
ble end_inner_loop_wd_4
inner_loop_wd_4:
vld1.32 {d0[0]},[r0] @vld1_lane_u32((uint32_t *)pu1_src_tmp, src_tmp, 0)
add r5,r0,r2 @pu1_src_tmp += src_strd
add r6,r1,r3 @pu1_dst_tmp += dst_strd
vst1.32 {d0[0]},[r1] @vst1_lane_u32((uint32_t *)pu1_dst_tmp, src_tmp, 0)
vld1.32 {d0[0]},[r5],r2 @vld1_lane_u32((uint32_t *)pu1_src_tmp, src_tmp, 0)
add r0,r0,#4 @pu1_src += 4
vst1.32 {d0[0]},[r6],r3 @vst1_lane_u32((uint32_t *)pu1_dst_tmp, src_tmp, 0)
vld1.32 {d0[0]},[r5],r2 @vld1_lane_u32((uint32_t *)pu1_src_tmp, src_tmp, 0)
subs r4,r4,#4 @(wd -4)
vst1.32 {d0[0]},[r6],r3 @vst1_lane_u32((uint32_t *)pu1_dst_tmp, src_tmp, 0)
vld1.32 {d0[0]},[r5],r2 @vld1_lane_u32((uint32_t *)pu1_src_tmp, src_tmp, 0)
add r1,r1,#4 @pu1_dst += 4
vst1.32 {d0[0]},[r6],r3 @vst1_lane_u32((uint32_t *)pu1_dst_tmp, src_tmp, 0)
bgt inner_loop_wd_4
end_inner_loop_wd_4:
subs r7,r7,#4 @ht - 4
sub r0,r5,r11 @pu1_src = pu1_src_tmp
sub r1,r6,r11 @pu1_dst = pu1_dst_tmp
bgt outer_loop_wd_4
end_loops:
ldmfd sp!,{r4-r12,r15} @reload the registers from sp
core_loop_wd_8:
sub r11,r12,#8
outer_loop_wd_8:
subs r4,r12,#0 @checks wd
ble end_inner_loop_wd_8
inner_loop_wd_8:
add r5,r0,r2 @pu1_src_tmp += src_strd
vld1.8 {d0},[r0]! @vld1_u8(pu1_src_tmp)
add r6,r1,r3 @pu1_dst_tmp += dst_strd
vst1.8 {d0},[r1]! @vst1_u8(pu1_dst_tmp, tmp_src)
vld1.8 {d1},[r5],r2 @vld1_u8(pu1_src_tmp)
vst1.8 {d1},[r6],r3 @vst1_u8(pu1_dst_tmp, tmp_src)
subs r4,r4,#8 @wd - 8(loop condition)
vld1.8 {d2},[r5],r2 @vld1_u8(pu1_src_tmp)
vst1.8 {d2},[r6],r3 @vst1_u8(pu1_dst_tmp, tmp_src)
vld1.8 {d3},[r5],r2 @vld1_u8(pu1_src_tmp)
vst1.8 {d3},[r6],r3 @vst1_u8(pu1_dst_tmp, tmp_src)
bgt inner_loop_wd_8
end_inner_loop_wd_8:
subs r7,r7,#4 @ht -= 4
sub r0,r5,r11 @pu1_src = pu1_src_tmp
sub r1,r6,r11 @pu1_dst = pu1_dst_tmp
bgt outer_loop_wd_8
ldmfd sp!,{r4-r12,r15} @reload the registers from sp
core_loop_wd_16:
sub r11,r12,#16
outer_loop_wd_16:
subs r4,r12,#0 @checks wd
ble end_inner_loop_wd_16
inner_loop_wd_16:
add r5,r0,r2 @pu1_src_tmp += src_strd
vld1.8 {q0},[r0]! @vld1_u8(pu1_src_tmp)
add r6,r1,r3 @pu1_dst_tmp += dst_strd
vst1.8 {q0},[r1]! @vst1_u8(pu1_dst_tmp, tmp_src)
vld1.8 {q1},[r5],r2 @vld1_u8(pu1_src_tmp)
vst1.8 {q1},[r6],r3 @vst1_u8(pu1_dst_tmp, tmp_src)
subs r4,r4,#16 @wd - 8(loop condition)
vld1.8 {q2},[r5],r2 @vld1_u8(pu1_src_tmp)
vst1.8 {q2},[r6],r3 @vst1_u8(pu1_dst_tmp, tmp_src)
vld1.8 {q3},[r5],r2 @vld1_u8(pu1_src_tmp)
vst1.8 {q3},[r6],r3 @vst1_u8(pu1_dst_tmp, tmp_src)
bgt inner_loop_wd_16
end_inner_loop_wd_16:
subs r7,r7,#4 @ht -= 4
sub r0,r5,r11 @pu1_src = pu1_src_tmp
sub r1,r6,r11 @pu1_dst = pu1_dst_tmp
bgt outer_loop_wd_16
ldmfd sp!,{r4-r12,r15} @reload the registers from sp
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