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/*
* Copyright © 2024 Rémi Denis-Courmont.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "libavutil/riscv/asm.S"
.macro sx rd, addr
#if (__riscv_xlen == 32)
sw \rd, \addr
#elif (__riscv_xlen == 64)
sd \rd, \addr
#else
sq \rd, \addr
#endif
.endm
.variant_cc ff_h264_idct4_rvv
func ff_h264_idct4_rvv, zve32x
vsra.vi v5, v1, 1
vsra.vi v7, v3, 1
vadd.vv v8, v0, v2 # z0
vsub.vv v9, v0, v2 # z1
vsub.vv v10, v5, v3 # z2
vadd.vv v11, v1, v7 # z3
vadd.vv v1, v9, v10
vsub.vv v2, v9, v10
vadd.vv v0, v8, v11
vsub.vv v3, v8, v11
jr t0
endfunc
func ff_h264_idct_add_8_rvv, zve32x
csrwi vxrm, 0
.Lidct_add4_8_rvv:
vsetivli zero, 4, e16, mf2, ta, ma
addi t1, a1, 1 * 4 * 2
vle16.v v0, (a1)
addi t2, a1, 2 * 4 * 2
vle16.v v1, (t1)
addi t3, a1, 3 * 4 * 2
vle16.v v2, (t2)
vle16.v v3, (t3)
jal t0, ff_h264_idct4_rvv
vse16.v v0, (a1)
vse16.v v1, (t1)
vse16.v v2, (t2)
vse16.v v3, (t3)
vlseg4e16.v v0, (a1)
.rept 256 / __riscv_xlen
sx zero, ((__riscv_xlen / 8) * \+)(a1)
.endr
jal t0, ff_h264_idct4_rvv
add t1, a0, a2
vle8.v v4, (a0)
add t2, t1, a2
vle8.v v5, (t1)
add t3, t2, a2
vle8.v v6, (t2)
vle8.v v7, (t3)
.irp n,0,1,2,3
vssra.vi v\n, v\n, 6
.endr
vsetvli zero, zero, e8, mf4, ta, ma
vwaddu.wv v0, v0, v4
vwaddu.wv v1, v1, v5
vwaddu.wv v2, v2, v6
vwaddu.wv v3, v3, v7
vsetvli zero, zero, e16, mf2, ta, ma
.irp n,0,1,2,3
vmax.vx v\n, v\n, zero
.endr
vsetvli zero, zero, e8, mf4, ta, ma
vnclipu.wi v4, v0, 0
vnclipu.wi v5, v1, 0
vnclipu.wi v6, v2, 0
vnclipu.wi v7, v3, 0
vse8.v v4, (a0)
vse8.v v5, (t1)
vse8.v v6, (t2)
vse8.v v7, (t3)
ret
endfunc
.variant_cc ff_h264_idct8_rvv
func ff_h264_idct8_rvv, zve32x
vsra.vi v9, v7, 1
vsra.vi v11, v3, 1
vsra.vi v12, v2, 1
vsra.vi v13, v5, 1
vsra.vi v14, v6, 1
vsra.vi v15, v1, 1
vadd.vv v9, v3, v9
vsub.vv v11, v1, v11
vsub.vv v13, v13, v1
vadd.vv v15, v3, v15
vsub.vv v9, v5, v9
vadd.vv v11, v11, v7
vadd.vv v13, v13, v7
vadd.vv v15, v15, v5
vadd.vv v8, v0, v4 # a0
vsub.vv v9, v9, v7 # a1
vsub.vv v10, v0, v4 # a2
vsub.vv v11, v11, v3 # a3
vsub.vv v12, v12, v6 # a4
vadd.vv v13, v13, v5 # a5
vadd.vv v14, v14, v2 # a6
vadd.vv v15, v15, v1 # a7
vsra.vi v7, v9, 2
vsra.vi v5, v11, 2
vsra.vi v3, v13, 2
vsra.vi v1, v15, 2
vadd.vv v0, v8, v14 # b0
vadd.vv v6, v10, v12 # b2
vsub.vv v2, v10, v12 # b4
vsub.vv v4, v8, v14 # b6
vsub.vv v8, v15, v7 # b7
vsub.vv v14, v5, v13 # b5
vadd.vv v12, v1, v9 # b1
vadd.vv v10, v11, v3 # b3
vadd.vv v1, v6, v14
vsub.vv v6, v6, v14
vsub.vv v7, v0, v8
vadd.vv v0, v0, v8
vsub.vv v5, v2, v10
vadd.vv v2, v2, v10
vadd.vv v3, v4, v12
vsub.vv v4, v4, v12
jr t0
endfunc
func ff_h264_idct8_add_8_rvv, zve32x
csrwi vxrm, 0
.Lidct8_add_8_rvv:
vsetivli zero, 8, e16, m1, ta, ma
addi t1, a1, 1 * 8 * 2
vle16.v v0, (a1)
addi t2, a1, 2 * 8 * 2
vle16.v v1, (t1)
addi t3, a1, 3 * 8 * 2
vle16.v v2, (t2)
addi t4, a1, 4 * 8 * 2
vle16.v v3, (t3)
addi t5, a1, 5 * 8 * 2
vle16.v v4, (t4)
addi t6, a1, 6 * 8 * 2
vle16.v v5, (t5)
addi a7, a1, 7 * 8 * 2
vle16.v v6, (t6)
vle16.v v7, (a7)
jal t0, ff_h264_idct8_rvv
vse16.v v0, (a1)
vse16.v v1, (t1)
vse16.v v2, (t2)
vse16.v v3, (t3)
vse16.v v4, (t4)
vse16.v v5, (t5)
vse16.v v6, (t6)
vse16.v v7, (a7)
vlseg8e16.v v0, (a1)
.rept 1024 / __riscv_xlen
sx zero, ((__riscv_xlen / 8) * \+)(a1)
.endr
jal t0, ff_h264_idct8_rvv
add t1, a0, a2
vle8.v v16, (a0)
add t2, t1, a2
vle8.v v17, (t1)
add t3, t2, a2
vle8.v v18, (t2)
add t4, t3, a2
vle8.v v19, (t3)
add t5, t4, a2
vle8.v v20, (t4)
add t6, t5, a2
vle8.v v21, (t5)
add a7, t6, a2
vle8.v v22, (t6)
vle8.v v23, (a7)
.irp n,0,1,2,3,4,5,6,7
vssra.vi v\n, v\n, 6
.endr
vsetvli zero, zero, e8, mf2, ta, ma
vwaddu.wv v0, v0, v16
vwaddu.wv v1, v1, v17
vwaddu.wv v2, v2, v18
vwaddu.wv v3, v3, v19
vwaddu.wv v4, v4, v20
vwaddu.wv v5, v5, v21
vwaddu.wv v6, v6, v22
vwaddu.wv v7, v7, v23
vsetvli zero, zero, e16, m1, ta, ma
.irp n,0,1,2,3,4,5,6,7
vmax.vx v\n, v\n, zero
.endr
vsetvli zero, zero, e8, mf2, ta, ma
vnclipu.wi v16, v0, 0
vnclipu.wi v17, v1, 0
vnclipu.wi v18, v2, 0
vnclipu.wi v19, v3, 0
vnclipu.wi v20, v4, 0
vnclipu.wi v21, v5, 0
vnclipu.wi v22, v6, 0
vnclipu.wi v23, v7, 0
vse8.v v16, (a0)
vse8.v v17, (t1)
vse8.v v18, (t2)
vse8.v v19, (t3)
vse8.v v20, (t4)
vse8.v v21, (t5)
vse8.v v22, (t6)
vse8.v v23, (a7)
ret
endfunc
const ff_h264_scan8
.byte 014, 015, 024, 025, 016, 017, 026, 027
.byte 034, 035, 044, 045, 036, 037, 046, 047
endconst
#if (__riscv_xlen == 64)
.irp depth, 8
func ff_h264_idct_add16_\depth\()_rvv, zve32x
csrwi vxrm, 0
addi sp, sp, -80
lla t0, ff_h264_scan8
sd s0, (sp)
li t1, 32 << (\depth > 8)
mv s0, sp
sd ra, 8(sp)
sd s1, 16(sp)
sd s2, 24(sp)
sd s3, 32(sp)
sd s4, 40(sp)
sd s5, 48(sp)
sd s6, 56(sp)
sd s7, 64(sp)
vsetivli zero, 16, e8, m1, ta, ma
vle8.v v8, (t0)
vlse16.v v16, (a2), t1
vluxei8.v v12, (a4), v8
.if \depth == 8
vsetvli zero, zero, e16, m2, ta, ma
.else
vsetvli zero, zero, e32, m4, ta, ma
.endif
vmsne.vi v1, v16, 0
vsetvli zero, zero, e8, m1, ta, ma
vmseq.vi v2, v12, 1
vmsne.vi v0, v12, 0
vmand.mm v1, v1, v2
vsetvli zero, zero, e16, m2, ta, ma
vmv.x.s s2, v0
vmv.x.s s3, v1
li s1, 16
mv s4, a0
mv s5, a1
mv s6, a2
mv s7, a3
1:
andi t0, s2, 1
addi s1, s1, -1
srli s2, s2, 1
beqz t0, 3f # if (nnz)
lw t2, (s5) # block_offset[i]
andi t1, s3, 1
mv a1, s6
mv a2, s7
add a0, s4, t2
beqz t1, 2f # if (nnz == 1 && block[i * 16])
call ff_h264_idct_dc_add_\depth\()_c
j 3f
2:
call .Lidct_add4_\depth\()_rvv
3:
srli s3, s3, 1
addi s5, s5, 4
addi s6, s6, 16 * 2 << (\depth > 8)
bnez s1, 1b
ld s7, 64(sp)
ld s6, 56(sp)
ld s5, 48(sp)
ld s4, 40(sp)
ld s3, 32(sp)
ld s2, 24(sp)
ld s1, 16(sp)
ld ra, 8(sp)
ld s0, 0(sp)
addi sp, sp, 80
ret
endfunc
func ff_h264_idct_add16intra_\depth\()_rvv, zve32x
csrwi vxrm, 0
addi sp, sp, -80
lla t0, ff_h264_scan8
sd s0, (sp)
li t1, 32 << (\depth > 8)
mv s0, sp
sd ra, 8(sp)
sd s1, 16(sp)
sd s2, 24(sp)
sd s3, 32(sp)
sd s4, 40(sp)
sd s5, 48(sp)
sd s6, 56(sp)
sd s7, 64(sp)
vsetivli zero, 16, e8, m1, ta, ma
vle8.v v8, (t0)
vlse16.v v16, (a2), t1
vluxei8.v v12, (a4), v8
.if \depth == 8
vsetvli zero, zero, e16, m2, ta, ma
.else
vsetvli zero, zero, e32, m4, ta, ma
.endif
vmsne.vi v1, v16, 0
vsetvli zero, zero, e8, m1, ta, ma
vmsne.vi v0, v12, 0
vsetvli zero, zero, e16, m2, ta, ma
vmv.x.s s2, v0
vmv.x.s s3, v1
li s1, 16
mv s4, a0
mv s5, a1
mv s6, a2
mv s7, a3
1:
andi t0, s2, 1
addi s1, s1, -1
srli s2, s2, 1
lw t2, (s5) # block_offset[i]
andi t1, s3, 1
mv a1, s6
mv a2, s7
add a0, s4, t2
beqz t0, 2f # if (nnzc[scan8[i]])
call .Lidct_add4_\depth\()_rvv
j 3f
2:
beqz t1, 3f # if (block[i * 16])
call ff_h264_idct_dc_add_\depth\()_c
3:
srli s3, s3, 1
addi s5, s5, 4
addi s6, s6, 16 * 2 << (\depth > 8)
bnez s1, 1b
ld s7, 64(sp)
ld s6, 56(sp)
ld s5, 48(sp)
ld s4, 40(sp)
ld s3, 32(sp)
ld s2, 24(sp)
ld s1, 16(sp)
ld ra, 8(sp)
ld s0, 0(sp)
addi sp, sp, 80
ret
endfunc
func ff_h264_idct8_add4_\depth\()_rvv, zve32x
csrwi vxrm, 0
addi sp, sp, -80
lla t0, ff_h264_scan8
sd s0, (sp)
li t1, 4 * 32 << (\depth > 8)
mv s0, sp
li t2, 4
sd ra, 8(sp)
sd s1, 16(sp)
sd s2, 24(sp)
sd s3, 32(sp)
sd s4, 40(sp)
sd s5, 48(sp)
sd s6, 56(sp)
sd s7, 64(sp)
vsetivli zero, 4, e8, mf4, ta, ma
vlse8.v v8, (t0), t2
vlse16.v v16, (a2), t1
vluxei8.v v12, (a4), v8
.if \depth == 8
vsetvli zero, zero, e16, mf2, ta, ma
.else
vsetvli zero, zero, e32, m1, ta, ma
.endif
vmsne.vi v1, v16, 0
vsetvli zero, zero, e8, mf4, ta, ma
vmseq.vi v2, v12, 1
vmsne.vi v0, v12, 0
vmand.mm v1, v1, v2
vmv.x.s s2, v0
vmv.x.s s3, v1
li s1, 4
mv s4, a0
mv s5, a1
mv s6, a2
mv s7, a3
1:
andi t0, s2, 1
addi s1, s1, -1
srli s2, s2, 1
beqz t0, 3f # if (nnz)
lw t2, (s5) # block_offset[i]
andi t1, s3, 1
mv a1, s6
mv a2, s7
add a0, s4, t2
beqz t1, 2f # if (nnz == 1 && block[i * 16])
call ff_h264_idct8_dc_add_\depth\()_c
j 3f
2:
call .Lidct8_add_\depth\()_rvv
3:
srli s3, s3, 1
addi s5, s5, 4 * 4
addi s6, s6, 4 * 16 * 2 << (\depth > 8)
bnez s1, 1b
ld s7, 64(sp)
ld s6, 56(sp)
ld s5, 48(sp)
ld s4, 40(sp)
ld s3, 32(sp)
ld s2, 24(sp)
ld s1, 16(sp)
ld ra, 8(sp)
ld s0, 0(sp)
addi sp, sp, 80
ret
endfunc
.endr
#endif
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