/*
 * Copyright (c) 2024 Institute 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"

func ff_rv34_inv_transform_dc_rvv, zve32x
        lpad    0
        lh            t1, 0(a0)
        li            t0, 13 * 13 * 3
        mul           t2, t0, t1
        srai          t2, t2, 11
        vsetivli      zero, 16, e16, m2, ta, ma
        vmv.v.x       v8, t2
        vse16.v       v8, (a0)

        ret
endfunc

func ff_rv34_idct_dc_add_rvv, zve32x
        lpad    0
        vsetivli      zero, 4, e8, mf4, ta, ma
        vlse32.v      v0, (a0), a1
        li            t1, 169
        mul           t1, t1, a2
        addi          t1, t1, 512
        srai          t1, t1, 10
        vsetivli    zero, 4*4, e8, m2, ta, ma
        bgez    t1, 1f

        neg     t1, t1
        vssubu.vx   v0, v0, t1
        vsetivli    zero, 4, e8, mf4, ta, ma
        vsse32.v    v0, (a0), a1
        ret
1:
        vsaddu.vx   v0, v0, t1
        vsetivli    zero, 4, e8, mf4, ta, ma
        vsse32.v    v0, (a0), a1
        ret
endfunc
