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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
li t0, 16
vsetivli zero, 16, e8, m1, ta, ma
j 1f
endfunc
func ff_avg_pixels8x8_rvv, zve32x
li t0, 8
vsetivli zero, 8, e8, mf2, ta, ma
1:
csrwi vxrm, 0
2:
vle8.v v16, (a1)
addi t0, t0, -1
vle8.v v8, (a0)
add a1, a1, a2
vaaddu.vv v16, v16, v8
vse8.v v16, (a0)
add a0, a0, a2
bnez t0, 2b
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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