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/*
* Copyright (c) 2024 Institue 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"
.macro vsetvlstatic8 len
.if \len <= 4
vsetivli zero, \len, e8, mf4, ta, ma
.elseif \len <= 8
vsetivli zero, \len, e8, mf2, ta, ma
.elseif \len <= 16
vsetivli zero, \len, e8, m1, ta, ma
.elseif \len <= 31
vsetivli zero, \len, e8, m2, ta, ma
.endif
.endm
.macro vsetvlstatic16 len
.if \len <= 4
vsetivli zero, \len, e16, mf2, ta, ma
.elseif \len <= 8
vsetivli zero, \len, e16, m1, ta, ma
.elseif \len <= 16
vsetivli zero, \len, e16, m2, ta, ma
.endif
.endm
.macro vp8_idct_dc_add
vlse32.v v0, (a0), a2
lh a5, 0(a1)
sh zero, 0(a1)
addi a5, a5, 4
srai t1, a5, 3
vsetivli zero, 4*4, e16, m2, ta, ma
vzext.vf2 v2, v0
vadd.vx v2, v2, t1
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), a2
.endm
.macro vp8_idct_dc_addy
vp8_idct_dc_add
addi a0, a0, 4
addi a1, a1, 32
.endm
func ff_vp8_idct_dc_add_rvv, zve32x
vsetivli zero, 4, e8, mf4, ta, ma
vp8_idct_dc_add
ret
endfunc
func ff_vp8_idct_dc_add4y_rvv, zve32x
vsetivli zero, 4, e8, mf4, ta, ma
.rept 3
vp8_idct_dc_addy
.endr
vp8_idct_dc_add
ret
endfunc
func ff_vp8_idct_dc_add4uv_rvv, zve32x
vsetivli zero, 4, e8, mf4, ta, ma
vp8_idct_dc_addy
vp8_idct_dc_add
addi a0, a0, -4
sh2add a0, a2, a0
addi a1, a1, 32
vp8_idct_dc_addy
vp8_idct_dc_add
ret
endfunc
.macro bilin_load dst len type mn
.ifc \type,v
add t5, a2, a3
.else
addi t5, a2, 1
.endif
vle8.v \dst, (a2)
vle8.v v2, (t5)
vwmulu.vx v28, \dst, t1
vwmaccu.vx v28, \mn, v2
vwaddu.wx v24, v28, t4
vnsra.wi \dst, v24, 3
.endm
.macro put_vp8_bilin_h_v len type mn
func ff_put_vp8_bilin\len\()_\type\()_rvv, zve32x
vsetvlstatic8 \len
li t1, 8
li t4, 4
sub t1, t1, \mn
1:
addi a4, a4, -1
bilin_load v0, \len, \type, \mn
vse8.v v0, (a0)
add a2, a2, a3
add a0, a0, a1
bnez a4, 1b
ret
endfunc
.endm
.macro put_vp8_bilin_hv len
func ff_put_vp8_bilin\len\()_hv_rvv, zve32x
vsetvlstatic8 \len
li t3, 8
sub t1, t3, a5
sub t2, t3, a6
li t4, 4
bilin_load v4, \len, h, a5
add a2, a2, a3
1:
addi a4, a4, -1
vwmulu.vx v20, v4, t2
bilin_load v4, \len, h, a5
vwmaccu.vx v20, a6, v4
vwaddu.wx v24, v20, t4
vnsra.wi v0, v24, 3
vse8.v v0, (a0)
add a2, a2, a3
add a0, a0, a1
bnez a4, 1b
ret
endfunc
.endm
const subpel_filters
.byte 0, -6, 123, 12, -1, 0
.byte 2, -11, 108, 36, -8, 1
.byte 0, -9, 93, 50, -6, 0
.byte 3, -16, 77, 77, -16, 3
.byte 0, -6, 50, 93, -9, 0
.byte 1, -8, 36, 108, -11, 2
.byte 0, -1, 12, 123, -6, 0
endconst
.macro epel_filter size type
lla t2, subpel_filters
.ifc \type,v
addi t0, a6, -1
.else
addi t0, a5, -1
.endif
li t1, 6
mul t0, t0, t1
add t0, t0, t2
.irp n,1,2,3,4
lb t\n, \n(t0)
.endr
.ifc \size,6
lb t5, 5(t0)
lb t0, (t0)
.endif
.endm
.macro epel_load dst len size type
.ifc \type,v
mv a5, a3
.else
li a5, 1
.endif
sub t6, a2, a5
add a7, a2, a5
vle8.v v24, (a2)
vle8.v v22, (t6)
vle8.v v26, (a7)
add a7, a7, a5
vle8.v v28, (a7)
vwmulu.vx v16, v24, t2
vwmulu.vx v20, v26, t3
.ifc \size,6
sub t6, t6, a5
add a7, a7, a5
vle8.v v24, (t6)
vle8.v v26, (a7)
vwmaccu.vx v16, t0, v24
vwmaccu.vx v16, t5, v26
.endif
li t6, 64
vwmaccsu.vx v16, t1, v22
vwmaccsu.vx v16, t4, v28
vwadd.wx v16, v16, t6
vsetvlstatic16 \len
vwadd.vv v24, v16, v20
vnsra.wi v24, v24, 7
vmax.vx v24, v24, zero
vsetvlstatic8 \len
vnclipu.wi \dst, v24, 0
.endm
.macro epel_load_inc dst len size type
epel_load \dst \len \size \type
add a2, a2, a3
.endm
.macro epel len size type
func ff_put_vp8_epel\len\()_\type\()\size\()_rvv, zve32x
epel_filter \size \type
vsetvlstatic8 \len
1:
addi a4, a4, -1
epel_load_inc v30 \len \size \type
vse8.v v30, (a0)
add a0, a0, a1
bnez a4, 1b
ret
endfunc
.endm
.irp len,16,8,4
put_vp8_bilin_h_v \len h a5
put_vp8_bilin_h_v \len v a6
put_vp8_bilin_hv \len
epel \len 6 h
epel \len 4 h
epel \len 6 v
epel \len 4 v
.endr
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