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/*
* Copyright (c) 2024 Institue of Software Chinese Academy of Sciences (ISCAS).
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/riscv/asm.S"
.macro vp8_idct_dc_add
vlse32.v v0, (a0), a2
lh a5, 0(a1)
sh zero, 0(a1)
addi a5, a5, 4
srai t1, a5, 3
vsetivli zero, 4*4, e16, m2, ta, ma
vzext.vf2 v2, v0
vadd.vx v2, v2, t1
vmax.vx v2, v2, zero
vsetvli zero, zero, e8, m1, ta, ma
vnclipu.wi v0, v2, 0
vsetivli zero, 4, e8, mf4, ta, ma
vsse32.v v0, (a0), a2
.endm
.macro vp8_idct_dc_addy
vp8_idct_dc_add
addi a0, a0, 4
addi a1, a1, 32
.endm
func ff_vp8_idct_dc_add_rvv, zve32x
vsetivli zero, 4, e8, mf4, ta, ma
vp8_idct_dc_add
ret
endfunc
func ff_vp8_idct_dc_add4y_rvv, zve32x
vsetivli zero, 4, e8, mf4, ta, ma
.rept 3
vp8_idct_dc_addy
.endr
vp8_idct_dc_add
ret
endfunc
func ff_vp8_idct_dc_add4uv_rvv, zve32x
vsetivli zero, 4, e8, mf4, ta, ma
vp8_idct_dc_addy
vp8_idct_dc_add
addi a0, a0, -4
sh2add a0, a2, a0
addi a1, a1, 32
vp8_idct_dc_addy
vp8_idct_dc_add
ret
endfunc
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