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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_inter_pred_chroma_horz_neon.s
//*
//* //brief
//* contains function definitions for inter prediction interpolation.
//* functions are coded using neon intrinsics and can be compiled using
//* rvct
//*
//* //author
//* yogeswaran rs / akshaya mukund
//*
//* //par list of functions:
//*
//*
//* //remarks
//* none
//*
//*******************************************************************************
//*/
///**
//*******************************************************************************
//*
//* //brief
//* chroma interprediction filter to store horizontal 16bit ouput
//*
//* //par description:
//* applies a horizontal filter with coefficients pointed to by 'pi1_coeff'
//* to the elements pointed by 'pu1_src' and writes to the location pointed
//* by 'pu1_dst' no downshifting or clipping is done and the output is used
//* as an input for vertical filtering or weighted prediction
//*
//* //param[in] pu1_src
//* uword8 pointer to the source
//*
//* //param[out] pi2_dst
//* word16 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_chroma_horz_w16out(uword8 *pu1_src,
// word16 *pi2_dst,
// word32 src_strd,
// word32 dst_strd,
// word8 *pi1_coeff,
// word32 ht,
// word32 wd)
//**************variables vs registers*****************************************
//x0 => *pu1_src
//x1 => *pi2_dst
//x2 => src_strd
//x3 => dst_strd
.text
.align 4
.include "ihevc_neon_macros.s"
.globl ihevc_inter_pred_chroma_horz_w16out_av8
.type ihevc_inter_pred_chroma_horz_w16out_av8, %function
ihevc_inter_pred_chroma_horz_w16out_av8:
// stmfd sp!, {x4-x12, x14} //stack stores the values of the arguments
stp d10,d11,[sp,#-16]!
stp d12,d13,[sp,#-16]!
stp d14,d15,[sp,#-16]!
stp x19, x20,[sp,#-16]!
mov x15,x4 // pi1_coeff
mov x16,x5 // ht
mov x17,x6 // wd
mov x4,x15 //loads pi1_coeff
mov x6,x16 //loads ht
mov x10,x17 //loads wd
ld1 {v0.8b},[x4] //coeff = vld1_s8(pi1_coeff)
subs x14,x6,#0 //checks for ht == 0
abs v2.8b, v0.8b //vabs_s8(coeff)
//******* added
mov x11, #2
//******* added ends
ble end_loops
dup v24.8b, v2.b[0] //coeffabs_0 = vdup_lane_u8(coeffabs, 0)
sub x12,x0,#2 //pu1_src - 2
dup v25.8b, v2.b[1] //coeffabs_1 = vdup_lane_u8(coeffabs, 1)
add x4,x12,x2 //pu1_src_tmp2_8 = pu1_src + src_strd
dup v26.8b, v2.b[2] //coeffabs_2 = vdup_lane_u8(coeffabs, 2)
tst x10,#3 //checks wd for multiples of 4
lsl x5, x10, #1 //2wd
dup v27.8b, v2.b[3] //coeffabs_3 = vdup_lane_u8(coeffabs, 3)
and x7,x14,#1 //added //calculating ht_residue ht_residue = (ht & 1)
sub x14,x14,x7 //added //decrement height by ht_residue(residue value is calculated outside)
bne outer_loop_4 // this branching happens when the width is 2 or 6
cmp x10,#12
beq skip_16
cmp x10,#8
bge outer_loop_16
skip_16:
tst x6,#3
//******* removal
//mov x11,#8
//******* removal ends
sub x9,x0,#2
beq outer_loop_ht_4 //this branching happens when the height is a a multiple of 4
// cmp x10,#12
// beq outer_loop_8
// cmp x10,#16
// bge outer_loop_16
b outer_loop_8
outer_loop_16:
add x4,x12,x2
and x0, x12, #31
add x20,x12, x2 , lsl #1
prfm PLDL1KEEP,[x20]
add x19,x12,#8
ld1 { v0.2s},[x12],x11 //vector load pu1_src
ld1 { v1.2s},[x19],x11 //vector load pu1_src
mov x10,x5 //2wd
mul x14, x14 , x10
ld1 { v2.2s},[x12],x11 //vector load pu1_src
ld1 { v3.2s},[x19],x11 //vector load pu1_src
add x20,x4, x2 , lsl #1
prfm PLDL1KEEP,[x20]
mov x9,#10
ld1 { v4.2s},[x12],x11 //vector load pu1_src
ld1 { v5.2s},[x19],x11 //vector load pu1_src
sub x20,x3,#8
neg x6, x20
sub x8,x3,#8
ld1 { v6.2s},[x12],x9 //vector load pu1_src
ld1 { v7.2s},[x19],x9 //vector load pu1_src
add x19,x4,#8
umull v30.8h, v2.8b, v25.8b //mul_res = vmull_u8(src[0_3], coeffabs_3)//
ld1 { v29.2s},[x4],x11 //vector load pu1_src
ld1 { v31.2s},[x19],x11 //vector load pu1_src
umlsl v30.8h, v0.8b, v24.8b //mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
ld1 { v10.2s},[x4],x11 //vector load pu1_src
ld1 { v11.2s},[x19],x11 //vector load pu1_src
umlal v30.8h, v4.8b, v26.8b //mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
ld1 { v12.2s},[x4],x11 //vector load pu1_src
ld1 { v13.2s},[x19],x11 //vector load pu1_src
umlsl v30.8h, v6.8b, v27.8b //mul_res = vmlal_u8(src[0_1], coeffabs_1)//
ld1 { v14.4s},[x4],x9 //vector load pu1_src
ld1 { v15.2s},[x19],x9 //vector load pu1_src
umull v28.8h, v3.8b, v25.8b
lsl x6,x6,#1
sub x20,x5,x3,lsl #1
neg x3, x20
umlsl v28.8h, v1.8b, v24.8b
lsl x8,x8,#1
sub x20,x5,x2,lsl #1
neg x7, x20
umlal v28.8h, v5.8b, v26.8b
umlsl v28.8h, v7.8b, v27.8b
cmp x14,#32
beq epilog_end
sub x14, x14,#64
inner_loop_16:
// and x7, x12, #31 //decrement the wd loop
// cmp x7, x0
add x20,x12, x2 , lsl #2
prfm PLDL1KEEP,[x20]
add x20,x4, x2 , lsl #2
prfm PLDL1KEEP,[x20]
subs x10,x10,#16
umull v22.8h, v10.8b, v25.8b //mul_res = vmull_u8(src[0_3], coeffabs_3)//
// add x20,x12,x2,lsl #1
//csel x12, x20, x12,eq
// sub x20,x12,x5
//csel x12, x20, x12,eq
add x20,x12,x7
csel x12, x20, x12,eq
add x20,x12,x2
csel x4, x20, x4,eq
st1 { v30.8h}, [x1],#16
umlsl v22.8h, v29.8b, v24.8b //mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
add x19,x12,#8
ld1 { v0.2s},[x12],x11 //vector load pu1_src
ld1 { v1.2s},[x19],x11 //vector load pu1_src
umlal v22.8h, v12.8b, v26.8b //mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
ld1 { v2.2s},[x12],x11 //vector load pu1_src
ld1 { v3.2s},[x19],x11 //vector load pu1_src
umlsl v22.8h, v14.8b, v27.8b //mul_res = vmlal_u8(src[0_1], coeffabs_1)//
ld1 { v4.2s},[x12],x11 //vector load pu1_src
ld1 { v5.2s},[x19],x11 //vector load pu1_src
umull v20.8h, v11.8b, v25.8b //mul_res = vmull_u8(src[0_3], coeffabs_3)//
st1 { v28.8h}, [x1],x8
umlsl v20.8h, v31.8b, v24.8b //mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
ld1 { v6.2s},[x12],x9 //vector load pu1_src
ld1 { v7.2s},[x19],x9 //vector load pu1_src
umlal v20.8h, v13.8b, v26.8b //mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
add x19,x4,#8
ld1 { v29.2s},[x4],x11 //vector load pu1_src
ld1 { v31.2s},[x19],x11 //vector load pu1_src
umlsl v20.8h, v15.8b, v27.8b //mul_res = vmlal_u8(src[0_1], coeffabs_1)//
ld1 { v10.2s},[x4],x11 //vector load pu1_src
ld1 { v11.2s},[x19],x11 //vector load pu1_src
umull v30.8h, v2.8b, v25.8b //mul_res = vmull_u8(src[0_3], coeffabs_3)//
ld1 { v12.2s},[x4],x11 //vector load pu1_src
ld1 { v13.2s},[x19],x11 //vector load pu1_src
umlsl v30.8h, v0.8b, v24.8b //mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
ld1 { v14.2s},[x4],x9 //vector load pu1_src
ld1 { v15.2s},[x19],x9 //vector load pu1_src
umlal v30.8h, v4.8b, v26.8b //mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
st1 { v22.8h},[x1],#16 //store the result pu1_dst
umlsl v30.8h, v6.8b, v27.8b //mul_res = vmlal_u8(src[0_1], coeffabs_1)//
csel x10, x5, x10,eq //2wd
umull v28.8h, v3.8b, v25.8b
umlsl v28.8h, v1.8b, v24.8b
st1 { v20.8h},[x1],x6 //store the result pu1_dst
add x20,x1,x3,lsl #1
csel x1, x20, x1,eq
umlal v28.8h, v5.8b, v26.8b
subs x14,x14,#32 //decrement the ht loop
umlsl v28.8h, v7.8b, v27.8b
// mov x0, x7
bgt inner_loop_16
add x14,x14,#64
cmp x14,#32
beq epilog_end
epilog:
st1 { v30.8h}, [x1],#16
umull v22.8h, v10.8b, v25.8b //mul_res = vmull_u8(src[0_3], coeffabs_3)//
st1 { v28.8h}, [x1],x8
umlsl v22.8h, v29.8b, v24.8b //mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
subs x10,x10,#16 //decrement the wd loop
umlal v22.8h, v12.8b, v26.8b //mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
// add x20,x12,x2,lsl #1
//csel x12, x20, x12,eq
add x20,x12,x7
csel x12, x20, x12,eq
umlsl v22.8h, v14.8b, v27.8b //mul_res = vmlal_u8(src[0_1], coeffabs_1)//
// sub x20,x12,x5
//csel x12, x20, x12,eq
csel x10, x5, x10,eq //2wd
add x20,x12,x2
csel x4, x20, x4,eq
umull v20.8h, v11.8b, v25.8b //mul_res = vmull_u8(src[0_3], coeffabs_3)//
add x19,x12,#8
ld1 { v0.2s},[x12],x11 //vector load pu1_src
ld1 { v1.2s},[x19],x11 //vector load pu1_src
umlsl v20.8h, v31.8b, v24.8b //mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
ld1 { v2.2s},[x12],x11 //vector load pu1_src
ld1 { v3.2s},[x19],x11 //vector load pu1_src
umlal v20.8h, v13.8b, v26.8b //mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
ld1 { v4.2s},[x12],x11 //vector load pu1_src
ld1 { v5.2s},[x19],x11 //vector load pu1_src
umlsl v20.8h, v15.8b, v27.8b //mul_res = vmlal_u8(src[0_1], coeffabs_1)//
ld1 { v6.2s},[x12],x9 //vector load pu1_src
ld1 { v7.2s},[x19],x9 //vector load pu1_src
umull v30.8h, v2.8b, v25.8b //mul_res = vmull_u8(src[0_3], coeffabs_3)//
add x19,x4,#8
ld1 { v29.2s},[x4],x11 //vector load pu1_src
ld1 { v31.2s},[x19],x11 //vector load pu1_src
umlsl v30.8h, v0.8b, v24.8b //mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
ld1 { v10.2s},[x4],x11 //vector load pu1_src
ld1 { v11.2s},[x19],x11 //vector load pu1_src
umlal v30.8h, v4.8b, v26.8b //mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
umlsl v30.8h, v6.8b, v27.8b //mul_res = vmlal_u8(src[0_1], coeffabs_1)//
ld1 { v12.2s},[x4],x11 //vector load pu1_src
ld1 { v13.2s},[x19],x11 //vector load pu1_src
umull v28.8h, v3.8b, v25.8b
ld1 { v14.2s},[x4],x9 //vector load pu1_src
ld1 { v15.2s},[x19],x9 //vector load pu1_src
umlsl v28.8h, v1.8b, v24.8b
st1 { v22.8h},[x1],#16 //store the result pu1_dst
umlal v28.8h, v5.8b, v26.8b
st1 { v20.8h},[x1],x6 //store the result pu1_dst
umlsl v28.8h, v7.8b, v27.8b
add x20,x1,x3,lsl #1
csel x1, x20, x1,eq
epilog_end:
umull v22.8h, v10.8b, v25.8b //mul_res = vmull_u8(src[0_3], coeffabs_3)//
umlsl v22.8h, v29.8b, v24.8b //mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
umlal v22.8h, v12.8b, v26.8b //mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
umlsl v22.8h, v14.8b, v27.8b //mul_res = vmlal_u8(src[0_1], coeffabs_1)//
umull v20.8h, v11.8b, v25.8b //mul_res = vmull_u8(src[0_3], coeffabs_3)//
umlsl v20.8h, v31.8b, v24.8b //mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
umlal v20.8h, v13.8b, v26.8b //mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
umlsl v20.8h, v15.8b, v27.8b //mul_res = vmlal_u8(src[0_1], coeffabs_1)//
st1 { v30.8h}, [x1],#16
st1 { v28.8h}, [x1],x8
st1 { v22.8h},[x1],#16 //store the result pu1_dst
st1 { v20.8h},[x1],x6 //store the result pu1_dst
mov x6,x16 //loads ht
and x7,x6,#1
cmp x7,#0
mov x10,x5
add x20,x12,x2,lsl #1
csel x12, x20, x12,ne
sub x20,x12,x5
csel x12, x20, x12,ne
add x20,x1,x3,lsl #1
csel x1, x20, x1,ne
bgt loop_residue_4
b end_loops
outer_loop_8:
add x6,x1,x3,lsl #1 //pu1_dst + dst_strd
mov x10,x5 //2wd
add x4,x12,x2 //pu1_src + src_strd
inner_loop_8:
//ld1 {v0.2s, v1.2s},[x12],x11 //vector load pu1_src
ld1 {v0.2s},[x12],x11 //vector load pu1_src
ld1 {v1.2s},[x12],x11 //vector load pu1_src
ld1 {v2.2s},[x12],x11 //vector load pu1_src
ld1 {v3.2s},[x12],x11 //vector load pu1_src
//vext.u8 d2,d0,d1,#2 //vector extract of src[0_2]
umull v29.8h, v1.8b, v25.8b //mul_res = vmull_u8(src[0_3], coeffabs_3)//
umlsl v29.8h, v0.8b, v24.8b //mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
//vext.u8 d4,d0,d1,#4 //vector extract of src[0_4]
//vext.u8 d6,d0,d1,#6 //vector extract of src[0_6]
umlal v29.8h, v2.8b, v26.8b //mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
umlsl v29.8h, v3.8b, v27.8b //mul_res = vmlal_u8(src[0_1], coeffabs_1)//
//ld1 {v12.2s, v13.2s},[x4],x11 //vector load pu1_src + src_strd
ld1 {v4.2s},[x4],x11 //vector load pu1_src
ld1 {v5.2s},[x4],x11 //vector load pu1_src
ld1 {v6.2s},[x4],x11 //vector load pu1_src
ld1 {v7.2s},[x4],x11 //vector load pu1_src
//vext.u8 d14,d12,d13,#2 //vector extract of src[0_2]
umull v10.8h, v5.8b, v25.8b //mul_res = vmull_u8(src[0_3], coeffabs_3)//
umlsl v10.8h, v4.8b, v24.8b //mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
//vext.u8 d16,d12,d13,#4 //vector extract of src[0_4]
//vext.u8 d18,d12,d13,#6 //vector extract of src[0_6]
umlal v10.8h, v6.8b, v26.8b //mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
umlsl v10.8h, v7.8b, v27.8b //mul_res = vmlal_u8(src[0_1], coeffabs_1)//
st1 {v29.8h}, [x1],#16
subs x10,x10,#8 //decrement the wd loop
st1 {v10.8h},[x6],#16 //store the result pu1_dst
bgt inner_loop_8
sub x12,x12,x5
subs x14,x14,#2 //decrement the ht loop
sub x1,x1,x5,lsl #1
add x12,x12,x2,lsl #1
add x1,x1,x3,lsl #2
bgt outer_loop_8
cmp x7,#0
mov x10,x5
bgt loop_residue_4
b end_loops
//height if 4 comes
outer_loop_ht_4:
mov x10,x5
prologue_ht_4:
lsl x8, x3, #1
inner_loop_ht_4:
mov x12,x9
mov x4,x1
sub x0, x2, #6 // not sure if x0 needs to be preserved
ld1 {v0.2s},[x12],x11 //(1)vector load pu1_src
ld1 {v1.2s},[x12],x11 //(1)vector load pu1_src
ld1 {v2.2s},[x12],x11 //(1)vector load pu1_src
ld1 {v3.2s},[x12],x0 //(1)vector load pu1_src
ld1 {v4.2s},[x12],x11 //(2)vector load pu1_src
ld1 {v5.2s},[x12],x11 //(2)vector load pu1_src
ld1 {v6.2s},[x12],x11 //(2)vector load pu1_src
ld1 {v7.2s},[x12],x0 //(2)vector load pu1_src
ld1 {v14.2s},[x12],x11 //(3)vector load pu1_src
umull v29.8h, v1.8b, v25.8b //(1)mul_res = vmull_u8(src[0_3], coeffabs_3)//
ld1 {v15.2s},[x12],x11 //(3)vector load pu1_src
umlsl v29.8h, v0.8b, v24.8b //(1)mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
ld1 {v16.2s},[x12],x11 //(3)vector load pu1_src
umlal v29.8h, v2.8b, v26.8b //(1)mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
ld1 {v17.2s},[x12],x0 //(3)vector load pu1_src
umlsl v29.8h, v3.8b, v27.8b //(1)mul_res = vmlal_u8(src[0_1], coeffabs_1)//
ld1 {v18.2s},[x12],x11 //(4)vector load pu1_src
umull v10.8h, v5.8b, v25.8b //(2)mul_res = vmull_u8(src[0_3], coeffabs_3)//
ld1 {v19.2s},[x12],x11 //(4)vector load pu1_src
umlsl v10.8h, v4.8b, v24.8b //(2)mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
ld1 {v20.2s},[x12],x11 //(4)vector load pu1_src
umlal v10.8h, v6.8b, v26.8b //(2)mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
ld1 {v21.2s},[x12],x2 //(4)vector load pu1_src
umlsl v10.8h, v7.8b, v27.8b //(2)mul_res = vmlal_u8(src[0_1], coeffabs_1)//
add x9,x9,#8 //(core loop)
subs x10,x10,#8 //(prologue)decrement the wd loop
beq epilogue
core_loop:
st1 {v29.8h},[x4],x8 //(1)store the result pu1_dst
mov x12,x9
ld1 {v0.2s},[x12],x11 //(1_1)vector load pu1_src
umull v12.8h, v15.8b, v25.8b //(3)mul_res = vmull_u8(src[0_3], coeffabs_3)//
ld1 {v1.2s},[x12],x11 //(1_1)vector load pu1_src
umlsl v12.8h, v14.8b, v24.8b //(3)mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
ld1 {v2.2s},[x12],x11 //(1_1)vector load pu1_src
umlal v12.8h, v16.8b, v26.8b //(3)mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
ld1 {v3.2s},[x12],x0 //(1_1)vector load pu1_src
umlsl v12.8h, v17.8b, v27.8b //(3)mul_res = vmlal_u8(src[0_1], coeffabs_1)//
st1 {v10.8h},[x4],x8 //(2)store the result pu1_dst
add x9,x9,#8 //(core loop)
ld1 {v4.2s},[x12],x11 //(2_1)vector load pu1_src
umull v22.8h, v19.8b, v25.8b //(4)mul_res = vmull_u8(src[0_3], coeffabs_3)//
ld1 {v5.2s},[x12],x11 //(2_1)vector load pu1_src
umlsl v22.8h, v18.8b, v24.8b //(4)mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
ld1 {v6.2s},[x12],x11 //(2_1)vector load pu1_src
umlal v22.8h, v20.8b, v26.8b //(4)mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
ld1 {v7.2s},[x12],x0 //(2_1)vector load pu1_src
umlsl v22.8h, v21.8b, v27.8b //(4)mul_res = vmlal_u8(src[0_1], coeffabs_1)//
st1 {v12.8h},[x4],x8 //(3)store the result pu1_dst
add x1,x1,#16 //(core loop)
ld1 {v14.2s},[x12],x11 //(3_1)vector load pu1_src
umull v29.8h, v1.8b, v25.8b //(1_1)mul_res = vmull_u8(src[0_3], coeffabs_3)//
ld1 {v15.2s},[x12],x11 //(3_1)vector load pu1_src
umlsl v29.8h, v0.8b, v24.8b //(1_1)mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
ld1 {v16.2s},[x12],x11 //(3_1)vector load pu1_src
umlal v29.8h, v2.8b, v26.8b //(1_1)mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
ld1 {v17.2s},[x12],x0 //(3_1)vector load pu1_src
umlsl v29.8h, v3.8b, v27.8b //(1_1)mul_res = vmlal_u8(src[0_1], coeffabs_1)//
st1 {v22.8h}, [x4], x8 //(4)store the result pu1_dst
subs x10,x10,#8 //(core loop)
umull v10.8h, v5.8b, v25.8b //(2_1)mul_res = vmull_u8(src[0_3], coeffabs_3)//
ld1 {v18.2s},[x12],x11 //(4_1)vector load pu1_src
ld1 {v19.2s},[x12],x11 //(4_1)vector load pu1_src
umlsl v10.8h, v4.8b, v24.8b //(2_1)mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
ld1 {v20.2s},[x12],x11 //(4_1)vector load pu1_src
umlal v10.8h, v6.8b, v26.8b //(2_1)mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
mov x4, x1 //(core loop)
ld1 {v21.2s},[x12],x0 //(4_1)vector load pu1_src
umlsl v10.8h, v7.8b, v27.8b //(2_1)mul_res = vmlal_u8(src[0_1], coeffabs_1)//
bgt core_loop //loopback
epilogue:
umull v12.8h, v15.8b, v25.8b //(3)mul_res = vmull_u8(src[0_3], coeffabs_3)//
umlsl v12.8h, v14.8b, v24.8b //(3)mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
umlal v12.8h, v16.8b, v26.8b //(3)mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
umlsl v12.8h, v17.8b, v27.8b //(3)mul_res = vmlal_u8(src[0_1], coeffabs_1)//
st1 {v29.8h},[x4], x8 //(1)store the result pu1_dst
umull v22.8h, v19.8b, v25.8b //(4)mul_res = vmull_u8(src[0_3], coeffabs_3)//
umlsl v22.8h, v18.8b, v24.8b //(4)mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
umlal v22.8h, v20.8b, v26.8b //(4)mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
umlsl v22.8h, v21.8b, v27.8b //(4)mul_res = vmlal_u8(src[0_1], coeffabs_1)//
st1 {v10.8h},[x4], x8 //(2)store the result pu1_dst
st1 {v12.8h},[x4], x8 //(3)store the result pu1_dst
add x1,x1,#16 //(core loop)
st1 {v22.8h},[x4], x8 //(4)store the result pu1_dst
sub x9,x9,x5
subs x14,x14,#4 //decrement the ht loop
sub x1,x1,x5,lsl #1
add x9,x9,x2,lsl #2
add x1,x1,x3,lsl #3
bgt outer_loop_ht_4
cmp x7,#0
mov x10,x5
csel x12, x9, x12,gt
csel x4, x1, x4,gt
bgt loop_residue_4
b end_loops
outer_loop_4:
add x6,x1,x3,lsl #1 //pu1_dst + dst_strd
mov x10,x5
add x4,x12,x2 //pu1_src + src_strd
inner_loop_4:
//ld1 {v0.2s, v1.2s},[x12] //vector load pu1_src
ld1 {v20.2s},[x12],x11 //vector load pu1_src
ld1 {v21.2s},[x12],x11 //vector load pu1_src
ld1 {v22.2s},[x12],x11 //vector load pu1_src
ld1 {v23.2s},[x12] //vector load pu1_src
//**** removal
//add x12,x12,#4 //increment the input pointer
//**** removal ends
//**** addn
sub x12,x12,#2 //increment the input pointer
//**** addn ends
ld1 {v16.2s},[x4],x11 //vector load pu1_src
ld1 {v17.2s},[x4],x11 //vector load pu1_src
ld1 {v18.2s},[x4],x11 //vector load pu1_src
ld1 {v19.2s},[x4] //vector load pu1_src
//vext.u8 d2,d0,d1,#2 //vector extract of src[0_2]
//vext.u8 d4,d0,d1,#4 //vector extract of src[0_4]
//ld1 {v12.2s, v13.2s},[x4] //vector load pu1_src + src_strd
//vext.u8 d6,d0,d1,#6 //vector extract of src[0_6]
//add x4,x4,#4 //increment the input pointer
sub x4,x4,#2
//vext.u8 d14,d12,d13,#2 //vector extract of src[0_2]
//vext.u8 d16,d12,d13,#4 //vector extract of src[0_4]
//vext.u8 d18,d12,d13,#6 //vector extract of src[0_6]
//**** removal
//zip1 v0.2s, v0.2s, v12.2s
//zip2 v12.2s, v0.2s, v12.2s //vector zip the i iteration and ii interation in single register
//zip1 v2.2s, v2.2s, v14.2s
//zip2 v14.2s, v2.2s, v14.2s
//zip1 v4.2s, v4.2s, v16.2s
//zip2 v16.2s, v4.2s, v16.2s
//zip1 v6.2s, v6.2s, v18.2s
//zip2 v18.2s, v6.2s, v18.2s
//**** removal ends
//**** addn
zip1 v0.2s, v20.2s, v16.2s
zip2 v4.2s, v20.2s, v16.2s //vector zip the i iteration and ii interation in single register
zip1 v1.2s, v21.2s, v17.2s
zip2 v5.2s, v21.2s, v17.2s
zip1 v2.2s, v22.2s, v18.2s
zip2 v6.2s, v22.2s, v18.2s
zip1 v3.2s, v23.2s, v19.2s
zip2 v7.2s, v23.2s, v19.2s
//**** addn ends
umull v29.8h, v1.8b, v25.8b //arithmetic operations for ii iteration in the same time
umlsl v29.8h, v0.8b, v24.8b
umlal v29.8h, v2.8b, v26.8b
umlsl v29.8h, v3.8b, v27.8b
st1 {v29.d}[0],[x1],#8 //store the i iteration result which is in upper part of the register
subs x10,x10,#4 //decrement the wd by 4
st1 {v29.d}[1],[x6],#8 //store the ii iteration result which is in lower part of the register
bgt inner_loop_4
sub x12,x12,x5
subs x14,x14,#2 //decrement the ht by 2
sub x1,x1,x5,lsl #1
add x12,x12,x2,lsl #1
add x1,x1,x3,lsl #2
bgt outer_loop_4
cmp x7,#0
mov x10,x5
beq end_loops
loop_residue_4:
mov x10,x5 //2wd
loop_residue:
//ld1 {v0.2s, v1.2s},[x12] //vector load pu1_src
ld1 {v20.2s},[x12],x11 //vector load pu1_src
ld1 {v21.2s},[x12],x11 //vector load pu1_src
ld1 {v22.2s},[x12],x11 //vector load pu1_src
ld1 {v23.2s},[x12] //vector load pu1_src
//vext.u8 d2,d0,d1,#2 //vector extract of src[0_2]
//umull v8.8h, v2.8b, v25.8b //mul_res = vmull_u8(src[0_3], coeffabs_3)//
//umlsl v8.8h, v0.8b, v24.8b //mul_res = vmlsl_u8(src[0_2], coeffabs_2)//
//vext.u8 d4,d0,d1,#4 //vector extract of src[0_4]
//add x12,x12,#4 //pu1_src + 4
sub x12, x12, #2
//vext.u8 d6,d0,d1,#6 //vector extract of src[0_6]
//umlal v8.8h, v4.8b, v26.8b //mul_res = vmlsl_u8(src[0_0], coeffabs_0)//
//umlsl v8.8h, v6.8b, v27.8b //mul_res = vmlal_u8(src[0_1], coeffabs_1)//
umull v29.8h, v21.8b, v25.8b
umlsl v29.8h, v20.8b, v24.8b
umlal v29.8h, v22.8b, v26.8b
umlsl v29.8h, v23.8b, v27.8b
st1 {v29.1d},[x1] //store the result pu1_dst
subs x10,x10,#4 //decrement the wd loop
add x1,x1,#8 //pi2_dst + 8
bgt loop_residue //loop again
//inner loop ends
//add x8,x3,lsl #1 //2*dst_strd
//sub x8,x8,x5,lsl #1 //2*dst_strd - 2wd
//sub x9,x2,x5 //src_strd - 2wd
//subs x7,x7,#1 //decrement the ht loop
//add x12,x12,x9 //pu1_src + src_strd
//add x1,x1,x8 //pu1_dst + 2*dst_strd
//bgt outer_loop_residue_4 //loop again
//b end_loops //jumps to end
end_loops:
// ldmfd sp!,{x4-x12,x15} //reload the registers from sp
ldp x19, x20,[sp],#16
ldp d14,d15,[sp],#16
ldp d12,d13,[sp],#16
ldp d10,d11,[sp],#16
ret
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