ref: 5c253615d307a6d00cc177da178a9b1c8a2251d3
dir: /codec/decoder/core/arm/block_add_neon.S/
/*!
* \copy
* Copyright (c) 2013, Cisco Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifdef HAVE_NEON
#include "arm_arch_common_macro.S"
.macro ROW_TRANSFORM_1_STEP arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9
// { // input: src_d[0]~[3], output: e_q[0]~[3]; working: $8 $9
vaddl.s16 \arg4, \arg0, \arg2 //int32 e[i][0] = src[0] + src[2];
vsubl.s16 \arg5, \arg0, \arg2 //int32 e[i][1] = src[0] - src[2];
vshr.s16 \arg8, \arg1, #1
vshr.s16 \arg9, \arg3, #1
vsubl.s16 \arg6, \arg8, \arg3 //int32 e[i][2] = (src[1]>>1)-src[3];
vaddl.s16 \arg7, \arg1, \arg9 //int32 e[i][3] = src[1] + (src[3]>>1);
// }
.endm
.macro TRANSFORM_4BYTES arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7 // both row & col transform used
// { // output: f_q[0]~[3], input: e_q[0]~[3];
vadd.s32 \arg0, \arg4, \arg7 //int16 f[i][0] = e[i][0] + e[i][3];
vadd.s32 \arg1, \arg5, \arg6 //int16 f[i][1] = e[i][1] + e[i][2];
vsub.s32 \arg2, \arg5, \arg6 //int16 f[i][2] = e[i][1] - e[i][2];
vsub.s32 \arg3, \arg4, \arg7 //int16 f[i][3] = e[i][0] - e[i][3];
// }
.endm
.macro COL_TRANSFORM_1_STEP arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7
// { // input: src_q[0]~[3], output: e_q[0]~[3];
vadd.s32 \arg4, \arg0, \arg2 //int32 e[0][j] = f[0][j] + f[2][j];
vsub.s32 \arg5, \arg0, \arg2 //int32 e[1][j] = f[0][j] - f[2][j];
vshr.s32 \arg6, \arg1, #1
vshr.s32 \arg7, \arg3, #1
vsub.s32 \arg6, \arg6, \arg3 //int32 e[2][j] = (f[1][j]>>1) - f[3][j];
vadd.s32 \arg7, \arg1, \arg7 //int32 e[3][j] = f[1][j] + (f[3][j]>>1);
// }
.endm
// uint8_t *pred, const int32_t stride, int16_t *rs
WELS_ASM_FUNC_BEGIN IdctResAddPred_neon
vld4.s16 {d0, d1, d2, d3}, [r2] // cost 3 cycles!
ROW_TRANSFORM_1_STEP d0, d1, d2, d3, q8, q9, q10, q11, d4, d5
TRANSFORM_4BYTES q0, q1, q2, q3, q8, q9, q10, q11
// transform element 32bits
vtrn.s32 q0, q1 //[0 1 2 3]+[4 5 6 7]-->[0 4 2 6]+[1 5 3 7]
vtrn.s32 q2, q3 //[8 9 10 11]+[12 13 14 15]-->[8 12 10 14]+[9 13 11 15]
vswp d1, d4 //[0 4 2 6]+[8 12 10 14]-->[0 4 8 12]+[2 6 10 14]
vswp d3, d6 //[1 5 3 7]+[9 13 11 15]-->[1 5 9 13]+[3 7 11 15]
COL_TRANSFORM_1_STEP q0, q1, q2, q3, q8, q9, q10, q11
TRANSFORM_4BYTES q0, q1, q2, q3, q8, q9, q10, q11
//after clip_table[MAX_NEG_CROP] into [0, 255]
mov r2, r0
vld1.32 {d20[0]},[r0],r1
vld1.32 {d20[1]},[r0],r1
vld1.32 {d22[0]},[r0],r1
vld1.32 {d22[1]},[r0]
vrshrn.s32 d16, q0, #6
vrshrn.s32 d17, q1, #6
vrshrn.s32 d18, q2, #6
vrshrn.s32 d19, q3, #6
vmovl.u8 q0,d20
vmovl.u8 q1,d22
vadd.s16 q0,q8
vadd.s16 q1,q9
vqmovun.s16 d20,q0
vqmovun.s16 d22,q1
vst1.32 {d20[0]},[r2],r1
vst1.32 {d20[1]},[r2],r1
vst1.32 {d22[0]},[r2],r1
vst1.32 {d22[1]},[r2]
WELS_ASM_FUNC_END
WELS_ASM_FUNC_BEGIN WelsBlockZero16x16_neon
veor q0, q0
veor q1, q1
lsl r1, r1, 1
.rept 16
vst1.64 {q0, q1}, [r0], r1
.endr
WELS_ASM_FUNC_END
WELS_ASM_FUNC_BEGIN WelsBlockZero8x8_neon
veor q0, q0
lsl r1, r1, 1
.rept 8
vst1.64 {q0}, [r0], r1
.endr
WELS_ASM_FUNC_END
#endif