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/*
* Copyright © 2024 Rémi Denis-Courmont.
*
* 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_range_lum_to_jpeg_16_rvv, zve32x
li t1, 30189
li t2, 19077
li t3, -39057361
1:
vsetvli t0, a1, e16, m4, ta, ma
vle16.v v0, (a0)
sub a1, a1, t0
vmin.vx v0, v0, t1
vwmul.vx v8, v0, t2
vsetvli zero, zero, e32, m8, ta, ma
vadd.vx v8, v8, t3
vsetvli zero, zero, e16, m4, ta, ma
vnsra.wi v0, v8, 14
vse16.v v0, (a0)
sh1add a0, t0, a0
bnez a1, 1b
ret
endfunc
func ff_range_lum_from_jpeg_16_rvv, zve32x
li t1, 14071
li t2, 33561947
1:
vsetvli t0, a1, e16, m4, ta, ma
vle16.v v0, (a0)
sub a1, a1, t0
vwmul.vx v8, v0, t1
vsetvli zero, zero, e32, m8, ta, ma
vadd.vx v8, v8, t2
vsetvli zero, zero, e16, m4, ta, ma
vnsra.wi v0, v8, 14
vse16.v v0, (a0)
sh1add a0, t0, a0
bnez a1, 1b
ret
endfunc
func ff_range_chr_to_jpeg_16_rvv, zve32x
li t1, 30775
li t2, 4663
li t3, -9289992
1:
vsetvli t0, a2, e16, m4, ta, ma
vle16.v v0, (a0)
sub a2, a2, t0
vle16.v v4, (a1)
vmin.vx v0, v0, t1
vmin.vx v4, v4, t1
vwmul.vx v8, v0, t2
vwmul.vx v16, v4, t2
vsetvli zero, zero, e32, m8, ta, ma
vadd.vx v8, v8, t3
vadd.vx v16, v16, t3
vsetvli zero, zero, e16, m4, ta, ma
vnsra.wi v0, v8, 12
vnsra.wi v4, v16, 12
vse16.v v0, (a0)
sh1add a0, t0, a0
vse16.v v4, (a1)
sh1add a1, t0, a1
bnez a2, 1b
ret
endfunc
func ff_range_chr_from_jpeg_16_rvv, zve32x
li t1, 1799
li t2, 4081085
1:
vsetvli t0, a2, e16, m4, ta, ma
vle16.v v0, (a0)
sub a2, a2, t0
vle16.v v4, (a1)
vwmul.vx v8, v0, t1
vwmul.vx v16, v4, t1
vsetvli zero, zero, e32, m8, ta, ma
vadd.vx v8, v8, t2
vadd.vx v16, v16, t2
vsetvli zero, zero, e16, m4, ta, ma
vnsra.wi v0, v8, 11
vnsra.wi v4, v16, 11
vse16.v v0, (a0)
sh1add a0, t0, a0
vse16.v v0, (a1)
sh1add a1, t0, a1
bnez a2, 1b
ret
endfunc
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