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FFmpeg/libavcodec/riscv/sbrdsp_rvv.S
Rémi Denis-Courmont c536e92207 lavc/sbrdsp: R-V V hf_apply_noise functions 
This is restricted to 128-bit vectors as larger vector sizes could read
past the end of the noise array. Support for future hardware with larger
vector sizes is left for some other time.

hf_apply_noise_0_c:       2319.7
hf_apply_noise_0_rvv_f32: 1229.0
hf_apply_noise_1_c:       2539.0
hf_apply_noise_1_rvv_f32: 1244.7
hf_apply_noise_2_c:       2319.7
hf_apply_noise_2_rvv_f32: 1232.7
hf_apply_noise_3_c:       2541.2
hf_apply_noise_3_rvv_f32: 1244.2
2023-11-13 18:34:29 +02:00

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/*
* Copyright © 2023 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_sbr_sum64x5_rvv, zve32f
li a5, 64
addi a1, a0, 64 * 4
addi a2, a0, 128 * 4
addi a3, a0, 192 * 4
addi a4, a0, 256 * 4
1:
vsetvli t0, a5, e32, m8, ta, ma
sub a5, a5, t0
vle32.v v0, (a0)
vle32.v v8, (a1)
sh2add a1, t0, a1
vle32.v v16, (a2)
vfadd.vv v0, v0, v8
sh2add a2, t0, a2
vle32.v v24, (a3)
vfadd.vv v0, v0, v16
sh2add a3, t0, a3
vle32.v v8, (a4)
vfadd.vv v0, v0, v24
sh2add a4, t0, a4
vfadd.vv v0, v0, v8
vse32.v v0, (a0)
sh2add a0, t0, a0
bnez a5, 1b
ret
endfunc
func ff_sbr_sum_square_rvv, zve32f
vsetvli t0, zero, e32, m8, ta, ma
slli a1, a1, 1
vmv.v.x v8, zero
vmv.s.x v0, zero
1:
vsetvli t0, a1, e32, m8, tu, ma
vle32.v v16, (a0)
sub a1, a1, t0
vfmacc.vv v8, v16, v16
sh2add a0, t0, a0
bnez a1, 1b
vfredusum.vs v0, v8, v0
vfmv.f.s fa0, v0
NOHWF fmv.x.w a0, fa0
ret
endfunc
#if __riscv_xlen >= 64
func ff_sbr_neg_odd_64_rvv, zve64x
li a1, 32
li t1, 1 << 63
1:
vsetvli t0, a1, e64, m8, ta, ma
vle64.v v8, (a0)
sub a1, a1, t0
vxor.vx v8, v8, t1
vse64.v v8, (a0)
sh3add a0, t0, a0
bnez t0, 1b
ret
endfunc
#endif
func ff_sbr_autocorrelate_rvv, zve32f
vsetvli t0, zero, e32, m4, ta, ma
vmv.v.x v0, zero
flw fa0, (a0)
vmv.v.x v4, zero
flw fa1, 4(a0)
vmv.v.x v8, zero
flw fa2, 8(a0)
li a2, 37
flw fa3, 12(a0)
fmul.s ft10, fa0, fa0
flw fa4, 16(a0)
fmul.s ft6, fa0, fa2
flw fa5, 20(a0)
addi a0, a0, 38 * 8
fmul.s ft7, fa0, fa3
fmul.s ft2, fa0, fa4
fmul.s ft3, fa0, fa5
flw fa0, (a0)
fmadd.s ft10, fa1, fa1, ft10
fmadd.s ft6, fa1, fa3, ft6
flw fa3, 12(a0)
fnmsub.s ft7, fa1, fa2, ft7
flw fa2, 8(a0)
fmadd.s ft2, fa1, fa5, ft2
fnmsub.s ft3, fa1, fa4, ft3
flw fa1, 4(a0)
fmul.s ft4, fa0, fa0
fmul.s ft0, fa0, fa2
fmul.s ft1, fa0, fa3
fmadd.s ft4, fa1, fa1, ft4
fmadd.s ft0, fa1, fa3, ft0
fnmsub.s ft1, fa1, fa2, ft1
1:
vsetvli t0, a2, e32, m2, tu, ma
slli t1, t0, 3
sub a0, a0, t1
vlseg2e32.v v16, (a0)
sub a2, a2, t0
vfmacc.vv v0, v16, v16
vfslide1down.vf v20, v16, fa0
vfmacc.vv v4, v16, v20
vfslide1down.vf v22, v18, fa1
vfmacc.vv v0, v18, v18
vfslide1down.vf v24, v20, fa2
vfmacc.vv v4, v18, v22
vfslide1down.vf v26, v22, fa3
vfmacc.vv v6, v16, v22
vfmv.f.s fa0, v16
vfmacc.vv v8, v16, v24
vfmv.f.s fa1, v18
vfmacc.vv v10, v16, v26
vfmv.f.s fa2, v20
vfnmsac.vv v6, v18, v20
vfmv.f.s fa3, v22
vfmacc.vv v8, v18, v26
vfnmsac.vv v10, v18, v24
bnez a2, 1b
vsetvli t0, zero, e32, m2, ta, ma
vfredusum.vs v0, v0, v2
vfredusum.vs v4, v4, v2
vfmv.f.s fa0, v0
vfredusum.vs v6, v6, v2
vfmv.f.s fa2, v4
fadd.s ft4, ft4, fa0
vfredusum.vs v8, v8, v2
vfmv.f.s fa3, v6
fadd.s ft0, ft0, fa2
vfredusum.vs v10, v10, v2
vfmv.f.s fa4, v8
fadd.s ft1, ft1, fa3
vfmv.f.s fa5, v10
fsw ft0, (a1)
fadd.s ft2, ft2, fa4
fsw ft1, 4(a1)
fadd.s ft3, ft3, fa5
fsw ft2, 8(a1)
fadd.s ft6, ft6, fa2
fsw ft3, 12(a1)
fadd.s ft7, ft7, fa3
fsw ft4, 16(a1)
fadd.s ft10, ft10, fa0
fsw ft6, 24(a1)
fsw ft7, 28(a1)
fsw ft10, 40(a1)
ret
endfunc
func ff_sbr_hf_gen_rvv, zve32f
NOHWF fmv.w.x fa0, a4
NOHWF mv a4, a5
NOHWF mv a5, a6
flw ft2, 0(a2)
fmul.s fa1, fa0, fa0 // bw * bw
sh3add a1, a5, a1
flw ft3, 4(a2)
fmul.s fa2, ft2, fa0 // alpha[2]
sh3add a0, a5, a0
flw ft0, 0(a3)
fmul.s fa3, ft3, fa0 // alpha[3]
sub a5, a5, a4
flw ft1, 4(a3)
fmul.s fa0, ft0, fa1 // alpha[0]
flw ft0, -16(a1) // X_low[end - 2][0]
fmul.s fa1, ft1, fa1 // alpha[1]
flw ft1, -12(a1) // X_low[end - 2][1]
flw ft2, -8(a1) // X_low[end - 1][0]
flw ft3, -4(a1) // X_low[end - 1][1]
addi a1, a1, -16
1:
vsetvli t0, a5, e32, m4, ta, ma
slli t1, t0, 3
sub a1, a1, t1
vlseg2e32.v v0, (a1) // X_low[i - 2]
sub a0, a0, t1
vfslide1down.vf v8, v0, ft0 // X_low[i - 1][0]
sub a5, a5, t0
vfslide1down.vf v12, v4, ft1 // X_low[i - 1][1]
vfslide1down.vf v16, v8, ft2 // X_low[i ][0]
vfslide1down.vf v20, v12, ft3 // X_low[i ][1]
vfmacc.vf v16, fa0, v0
vfmacc.vf v20, fa0, v4
vfmv.f.s ft0, v0
vfnmsac.vf v16, fa1, v4
vfmacc.vf v20, fa1, v0
vfmv.f.s ft1, v4
vfmacc.vf v16, fa2, v8
vfmacc.vf v20, fa2, v12
vfmv.f.s ft2, v8
vfnmsac.vf v16, fa3, v12
vfmacc.vf v20, fa3, v8
vfmv.f.s ft3, v12
vsseg2e32.v v16, (a0)
bnez a5, 1b
ret
endfunc
func ff_sbr_hf_g_filt_rvv, zve32f
li t1, 40 * 2 * 4
sh3add a1, a4, a1
1:
vsetvli t0, a3, e32, m4, ta, ma
vlsseg2e32.v v16, (a1), t1
mul t2, t0, t1
vle32.v v8, (a2)
sub a3, a3, t0
vfmul.vv v16, v16, v8
add a1, t2, a1
vfmul.vv v20, v20, v8
sh2add a2, t0, a2
vsseg2e32.v v16, (a0)
sh3add a0, t0, a0
bnez a3, 1b
ret
endfunc
.macro hf_apply_noise n
lla a6, ff_sbr_noise_table
fmv.s.x ft0, zero
addi a6, a6, 8
1:
.if \n & 1
min t0, t0, a5 // preserve parity of t0 for v4 sign injector
vsetvli zero, t0, e32, m4, ta, mu
.else
vsetvli t0, a5, e32, m4, ta, mu
.endif
sh3add t6, a3, a6
vle32.v v8, (a1) // s_m
sub a5, a5, t0
vle32.v v12, (a2) // q_filt
sh2add a1, t0, a1
vmfeq.vf v0, v8, ft0 // s_m == 0.f
vlseg2e32.v v24, (t6) // ff_sbr_noise_table
sh2add a2, t0, a2
.if \n == 2
vfneg.v v8, v8
.endif
.if \n & 1
vfsgnjx.vv v8, v8, v4 // could equivalent use vxor.vv
.endif
add a3, t0, a3
vlseg2e32.v v16, (a0) // Y
andi a3, a3, 0x1ff
.if \n & 1
vfmul.vv v28, v12, v28
vfmacc.vv v16, v12, v24, v0.t
vmerge.vvm v28, v8, v28, v0
vfadd.vv v20, v20, v28
.else
vfmul.vv v24, v12, v24
vfmacc.vv v20, v12, v28, v0.t
vmerge.vvm v24, v8, v24, v0
vfadd.vv v16, v16, v24
.endif
vsseg2e32.v v16, (a0)
sh3add a0, t0, a0
bnez a5, 1b
ret
.endm
func ff_sbr_hf_apply_noise_0_rvv, zve32f
hf_apply_noise 0
endfunc
func ff_sbr_hf_apply_noise_3_rvv, zve32f
not a4, a4 // invert parity of kx
// fall through
endfunc
func ff_sbr_hf_apply_noise_1_rvv, zve32f
vsetvli t0, zero, e32, m4, ta, ma
vid.v v4
vxor.vx v4, v4, a4
vsll.vi v4, v4, 31 // v4[i] = (kx & 1) ? -0.f : +0.f
hf_apply_noise 1
endfunc
func ff_sbr_hf_apply_noise_2_rvv, zve32f
hf_apply_noise 2
endfunc
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