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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_mem_fns_neon.s
// *
// * ,:brief
// * Contains function definitions for memory manipulation
// *
// * ,:author
// * Naveen SR
// *
// * ,:par List of Functions:
// * - ihevc_memcpy()
// * - ihevc_memset_mul_8()
// * - ihevc_memset_16bit_mul_8()
// *
// * ,:remarks
// * None
// *
// *******************************************************************************
//*/
///**
//*******************************************************************************
//*
//* ,:brief
//* memcpy of a 1d array
//*
//* ,:par Description:
//* Does memcpy of 8bit data from source to destination for 8,16 or 32 number of bytes
//*
//* ,:param[in] pu1_dst
//* UWORD8 pointer to the destination
//*
//* ,:param[in] pu1_src
//* UWORD8 pointer to the source
//*
//* ,:param[in] num_bytes
//* number of bytes to copy
//* ,:returns
//*
//* ,:remarks
//* None
//*
//*******************************************************************************
//*/
//void ihevc_memcpy_mul_8(UWORD8 *pu1_dst,
// UWORD8 *pu1_src,
// UWORD8 num_bytes)
//**************Variables Vs Registers*************************
// x0 => *pu1_dst
// x1 => *pu1_src
// x2 => num_bytes
.text
.p2align 2
.global ihevc_memcpy_mul_8_av8
.type ihevc_memcpy_mul_8_av8, %function
ihevc_memcpy_mul_8_av8:
LOOP_NEON_MEMCPY_MUL_8:
// Memcpy 8 bytes
LD1 {v0.8b},[x1],#8
ST1 {v0.8b},[x0],#8
SUBS x2,x2,#8
BNE LOOP_NEON_MEMCPY_MUL_8
ret
//*******************************************************************************
//*/
//void ihevc_memcpy(UWORD8 *pu1_dst,
// UWORD8 *pu1_src,
// UWORD8 num_bytes)
//**************Variables Vs Registers*************************
// x0 => *pu1_dst
// x1 => *pu1_src
// x2 => num_bytes
.global ihevc_memcpy_av8
.type ihevc_memcpy_av8, %function
ihevc_memcpy_av8:
SUBS x2,x2,#8
BLT ARM_MEMCPY
LOOP_NEON_MEMCPY:
// Memcpy 8 bytes
LD1 {v0.8b},[x1],#8
ST1 {v0.8b},[x0],#8
SUBS x2,x2,#8
BGE LOOP_NEON_MEMCPY
CMN x2,#8
BEQ MEMCPY_RETURN
ARM_MEMCPY:
ADD x2,x2,#8
LOOP_ARM_MEMCPY:
LDRB w3,[x1],#1
STRB w3,[x0],#1
SUBS x2,x2,#1
BNE LOOP_ARM_MEMCPY
MEMCPY_RETURN:
ret
//void ihevc_memset_mul_8(UWORD8 *pu1_dst,
// UWORD8 value,
// UWORD8 num_bytes)
//**************Variables Vs Registers*************************
// x0 => *pu1_dst
// x1 => value
// x2 => num_bytes
.text
.p2align 2
.global ihevc_memset_mul_8_av8
.type ihevc_memset_mul_8_av8, %function
ihevc_memset_mul_8_av8:
// Assumptions: numbytes is either 8, 16 or 32
dup v0.8b,w1
LOOP_MEMSET_MUL_8:
// Memset 8 bytes
ST1 {v0.8b},[x0],#8
SUBS x2,x2,#8
BNE LOOP_MEMSET_MUL_8
ret
//void ihevc_memset(UWORD8 *pu1_dst,
// UWORD8 value,
// UWORD8 num_bytes)
//**************Variables Vs Registers*************************
// x0 => *pu1_dst
// x1 => value
// x2 => num_bytes
.global ihevc_memset_av8
.type ihevc_memset_av8, %function
ihevc_memset_av8:
SUBS x2,x2,#8
BLT ARM_MEMSET
dup v0.8b,w1
LOOP_NEON_MEMSET:
// Memcpy 8 bytes
ST1 {v0.8b},[x0],#8
SUBS x2,x2,#8
BGE LOOP_NEON_MEMSET
CMN x2,#8
BEQ MEMSET_RETURN
ARM_MEMSET:
ADD x2,x2,#8
LOOP_ARM_MEMSET:
STRB w1,[x0],#1
SUBS x2,x2,#1
BNE LOOP_ARM_MEMSET
MEMSET_RETURN:
ret
//void ihevc_memset_16bit_mul_8(UWORD16 *pu2_dst,
// UWORD16 value,
// UWORD8 num_words)
//**************Variables Vs Registers*************************
// x0 => *pu2_dst
// x1 => value
// x2 => num_words
.text
.p2align 2
.global ihevc_memset_16bit_mul_8_av8
.type ihevc_memset_16bit_mul_8_av8, %function
ihevc_memset_16bit_mul_8_av8:
// Assumptions: num_words is either 8, 16 or 32
// Memset 8 words
dup v0.8h,w1
LOOP_MEMSET_16BIT_MUL_8:
ST1 {v0.8h},[x0],#16
SUBS x2,x2,#8
BNE LOOP_MEMSET_16BIT_MUL_8
ret
//void ihevc_memset_16bit(UWORD16 *pu2_dst,
// UWORD16 value,
// UWORD8 num_words)
//**************Variables Vs Registers*************************
// x0 => *pu2_dst
// x1 => value
// x2 => num_words
.global ihevc_memset_16bit_av8
.type ihevc_memset_16bit_av8, %function
ihevc_memset_16bit_av8:
SUBS x2,x2,#8
BLT ARM_MEMSET_16BIT
dup v0.8h,w1
LOOP_NEON_MEMSET_16BIT:
// Memset 8 words
ST1 {v0.8h},[x0],#16
SUBS x2,x2,#8
BGE LOOP_NEON_MEMSET_16BIT
CMN x2,#8
BEQ MEMSET_16BIT_RETURN
ARM_MEMSET_16BIT:
ADD x2,x2,#8
LOOP_ARM_MEMSET_16BIT:
STRH w1,[x0],#2
SUBS x2,x2,#1
BNE LOOP_ARM_MEMSET_16BIT
MEMSET_16BIT_RETURN:
ret
.section .note.GNU-stack,"",%progbits
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