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/*
* Copyright (c) 2023 Institue of Software Chinese Academy of Sciences (ISCAS).
* Copyright (c) 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_vc1_inv_trans_8x8_dc_rvv, zve64x
lh t2, (a2)
vsetivli zero, 8, e8, mf2, ta, ma
vlse64.v v0, (a0), a1
sh1add t2, t2, t2
addi t2, t2, 1
srai t2, t2, 1
sh1add t2, t2, t2
addi t2, t2, 16
srai t2, t2, 5
li t0, 8*8
vsetvli zero, t0, e16, m8, ta, ma
vzext.vf2 v8, v0
vadd.vx v8, v8, t2
vmax.vx v8, v8, zero
vsetvli zero, zero, e8, m4, ta, ma
vnclipu.wi v0, v8, 0
vsetivli zero, 8, e8, mf2, ta, ma
vsse64.v v0, (a0), a1
ret
endfunc
func ff_vc1_inv_trans_4x8_dc_rvv, zve32x
lh t2, (a2)
vsetivli zero, 8, e8, mf2, ta, ma
vlse32.v v0, (a0), a1
slli t1, t2, 4
add t2, t2, t1
addi t2, t2, 4
srai t2, t2, 3
sh1add t2, t2, t2
slli t2, t2, 2
addi t2, t2, 64
srai t2, t2, 7
li t0, 4*8
vsetvli zero, t0, e16, m4, ta, ma
vzext.vf2 v4, v0
vadd.vx v4, v4, t2
vmax.vx v4, v4, zero
vsetvli zero, zero, e8, m2, ta, ma
vnclipu.wi v0, v4, 0
vsetivli zero, 8, e8, mf2, ta, ma
vsse32.v v0, (a0), a1
ret
endfunc
func ff_vc1_inv_trans_8x4_dc_rvv, zve64x
lh t2, (a2)
vsetivli zero, 4, e8, mf4, ta, ma
vlse64.v v0, (a0), a1
sh1add t2, t2, t2
addi t2, t2, 1
srai t2, t2, 1
slli t1, t2, 4
add t2, t2, t1
addi t2, t2, 64
srai t2, t2, 7
li t0, 8*4
vsetvli zero, t0, e16, m4, ta, ma
vzext.vf2 v4, v0
vadd.vx v4, v4, t2
vmax.vx v4, v4, zero
vsetvli zero, zero, e8, m2, ta, ma
vnclipu.wi v0, v4, 0
vsetivli zero, 4, e8, mf4, ta, ma
vsse64.v v0, (a0), a1
ret
endfunc
func ff_vc1_inv_trans_4x4_dc_rvv, zve32x
lh t2, (a2)
vsetivli zero, 4, e8, mf4, ta, ma
vlse32.v v0, (a0), a1
slli t1, t2, 4
add t2, t2, t1
addi t2, t2, 4
srai t2, t2, 3
slli t1, t2, 4
add t2, t2, t1
addi t2, t2, 64
srai t2, t2, 7
vsetivli zero, 4*4, e16, m2, ta, ma
vzext.vf2 v2, v0
vadd.vx v2, v2, t2
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), a1
ret
endfunc
.macro mspel_op op pos n1 n2
add t1, \pos, a2
v\op\()e8.v v\n1, (\pos)
sh1add \pos, a2, \pos
v\op\()e8.v v\n2, (t1)
.endm
.macro mspel_op_all op pos a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 a11 a12 a13 a14 a15 a16
mspel_op \op \pos \a1 \a2
mspel_op \op \pos \a3 \a4
mspel_op \op \pos \a5 \a6
mspel_op \op \pos \a7 \a8
mspel_op \op \pos \a9 \a10
mspel_op \op \pos \a11 \a12
mspel_op \op \pos \a13 \a14
mspel_op \op \pos \a15 \a16
.endm
func ff_avg_pixels16x16_rvv, zve32x
csrwi vxrm, 0
vsetivli zero, 16, e8, m1, ta, ma
mspel_op_all l a1 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
mspel_op_all l a0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
vsetvli t0, zero, e8, m8, ta, ma
sub a0, a0, a2
vaaddu.vv v0, v0, v16
neg a2, a2
vaaddu.vv v8, v8, v24
vsetivli zero, 16, e8, m1, ta, ma
mspel_op_all s a0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
ret
endfunc
func ff_avg_pixels8x8_rvv, zve64x
csrwi vxrm, 0
li t0, 64
vsetivli zero, 8, e8, mf2, ta, ma
vlse64.v v16, (a1), a2
vlse64.v v8, (a0), a2
vsetvli zero, t0, e8, m4, ta, ma
vaaddu.vv v16, v16, v8
vsetivli zero, 8, e8, mf2, ta, ma
vsse64.v v16, (a0), a2
ret
endfunc
func ff_vc1_unescape_buffer_rvv, zve32x
vsetivli zero, 2, e8, m1, ta, ma
vmv.v.i v8, -1
li t4, 1
vmv.v.i v12, -1
li t3, -1
mv t5, a2
blez a1, 3f
1:
vsetvli t0, a1, e8, m4, ta, ma
vle8.v v16, (a0)
vslideup.vi v8, v16, 2
addi t0, t0, -1 # we cannot fully process the last element
vslideup.vi v12, v16, 1
vslide1down.vx v20, v16, t3
vsetvli zero, t0, e8, m4, ta, ma
vmseq.vi v0, v8, 0
vmseq.vi v1, v12, 0
vmseq.vi v2, v16, 3
vmand.mm v0, v0, v1
vmsltu.vi v3, v20, 4
vmand.mm v0, v0, v2
vmand.mm v0, v0, v3
vfirst.m t2, v0
bgez t2, 4f # found an escape byte?
vse8.v v16, (a2)
addi t2, t0, -2
add a2, a2, t0
2:
vslidedown.vx v8, v16, t2
sub a1, a1, t0
vslidedown.vi v12, v8, 1
add a0, a0, t0
bgtu a1, t4, 1b // size > 1
lb t0, (a0)
sb t0, (a2) # copy last byte (cannot be escaped)
addi a2, a2, 1
3:
sub a0, a2, t5
ret
4:
vsetvli zero, t2, e8, m4, ta, ma
vse8.v v16, (a2)
addi t0, t2, 1
add a2, a2, t2
addi t2, t2, -1
vsetvli zero, t0, e8, m4, ta, ma
j 2b
endfunc
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