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