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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /media/ffvpx/libavcodec/aarch64/fft_neon.S | |
parent | Initial commit. (diff) | |
download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | media/ffvpx/libavcodec/aarch64/fft_neon.S | 447 |
1 files changed, 447 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/aarch64/fft_neon.S b/media/ffvpx/libavcodec/aarch64/fft_neon.S new file mode 100644 index 0000000000..d7225511dd --- /dev/null +++ b/media/ffvpx/libavcodec/aarch64/fft_neon.S @@ -0,0 +1,447 @@ +/* + * ARM NEON optimised FFT + * + * Copyright (c) 2009 Mans Rullgard <mans@mansr.com> + * Copyright (c) 2009 Naotoshi Nojiri + * Copyright (c) 2014 Janne Grunau <janne-libav@jannau.net> + * + * This algorithm (though not any of the implementation details) is + * based on libdjbfft by D. J. Bernstein. + * + * 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/aarch64/asm.S" + +#define M_SQRT1_2 0.70710678118654752440 + +.macro transpose d0, d1, s0, s1 + trn1 \d0, \s0, \s1 + trn2 \d1, \s0, \s1 +.endm + + +function fft4_neon + AARCH64_VALID_JUMP_TARGET + ld1 {v0.2s,v1.2s,v2.2s,v3.2s}, [x0] + + fadd v4.2s, v0.2s, v1.2s // r0+r1,i0+i1 + fsub v6.2s, v0.2s, v1.2s // r0-r1,i0-i1 + + ext v16.8b, v2.8b, v3.8b, #4 + ext v17.8b, v3.8b, v2.8b, #4 + + fadd v5.2s, v2.2s, v3.2s // i2+i3,r2+r3 + fsub v7.2s, v16.2s, v17.2s // r3-r2,i2-i3 + + fadd v0.2s, v4.2s, v5.2s + fsub v2.2s, v4.2s, v5.2s + fadd v1.2s, v6.2s, v7.2s + fsub v3.2s, v6.2s, v7.2s + + st1 {v0.2s,v1.2s,v2.2s,v3.2s}, [x0] + + ret +endfunc + +function fft8_neon + AARCH64_VALID_JUMP_TARGET + mov x1, x0 + ld1 {v0.2s, v1.2s, v2.2s, v3.2s}, [x0], #32 + ld1 {v16.2s,v17.2s,v18.2s,v19.2s}, [x0] + ext v22.8b, v2.8b, v3.8b, #4 + ext v23.8b, v3.8b, v2.8b, #4 + fadd v4.2s, v16.2s, v17.2s // r4+r5,i4+i5 + fadd v5.2s, v18.2s, v19.2s // r6+r7,i6+i7 + fsub v17.2s, v16.2s, v17.2s // r4-r5,i4-i5 + fsub v19.2s, v18.2s, v19.2s // r6-r7,i6-i7 + rev64 v27.2s, v28.2s // ??? + fadd v20.2s, v0.2s, v1.2s // r0+r1,i0+i1 + fadd v21.2s, v2.2s, v3.2s // r2+r3,i2+i3 + fmul v26.2s, v17.2s, v28.2s // -a2r*w,a2i*w + ext v6.8b, v4.8b, v5.8b, #4 + ext v7.8b, v5.8b, v4.8b, #4 + fmul v27.2s, v19.2s, v27.2s // a3r*w,-a3i*w + fsub v23.2s, v22.2s, v23.2s // i2-i3,r3-r2 + fsub v22.2s, v0.2s, v1.2s // r0-r1,i0-i1 + fmul v24.2s, v17.2s, v28.s[1] // a2r*w,a2i*w + fmul v25.2s, v19.2s, v28.s[1] // a3r*w,a3i*w + fadd v0.2s, v20.2s, v21.2s + fsub v2.2s, v20.2s, v21.2s + fadd v1.2s, v22.2s, v23.2s + rev64 v26.2s, v26.2s + rev64 v27.2s, v27.2s + fsub v3.2s, v22.2s, v23.2s + fsub v6.2s, v6.2s, v7.2s + fadd v24.2s, v24.2s, v26.2s // a2r+a2i,a2i-a2r t1,t2 + fadd v25.2s, v25.2s, v27.2s // a3r-a3i,a3i+a3r t5,t6 + fadd v7.2s, v4.2s, v5.2s + fsub v18.2s, v2.2s, v6.2s + ext v26.8b, v24.8b, v25.8b, #4 + ext v27.8b, v25.8b, v24.8b, #4 + fadd v2.2s, v2.2s, v6.2s + fsub v16.2s, v0.2s, v7.2s + fadd v5.2s, v25.2s, v24.2s + fsub v4.2s, v26.2s, v27.2s + fadd v0.2s, v0.2s, v7.2s + fsub v17.2s, v1.2s, v5.2s + fsub v19.2s, v3.2s, v4.2s + fadd v3.2s, v3.2s, v4.2s + fadd v1.2s, v1.2s, v5.2s + + st1 {v16.2s,v17.2s,v18.2s,v19.2s}, [x0] + st1 {v0.2s, v1.2s, v2.2s, v3.2s}, [x1] + + ret +endfunc + +function fft16_neon + AARCH64_VALID_JUMP_TARGET + mov x1, x0 + ld1 {v0.2s, v1.2s, v2.2s, v3.2s}, [x0], #32 + ld1 {v16.2s,v17.2s,v18.2s,v19.2s}, [x0], #32 + ext v22.8b, v2.8b, v3.8b, #4 + ext v23.8b, v3.8b, v2.8b, #4 + fadd v4.2s, v16.2s, v17.2s // r4+r5,i4+i5 + fadd v5.2s, v18.2s, v19.2s // r6+r7,i6+i7 + fsub v17.2s, v16.2s, v17.2s // r4-r5,i4-i5 + fsub v19.2s, v18.2s, v19.2s // r6-r7,i6-i7 + rev64 v27.2s, v28.2s // ??? + fadd v20.2s, v0.2s, v1.2s // r0+r1,i0+i1 + fadd v21.2s, v2.2s, v3.2s // r2+r3,i2+i3 + fmul v26.2s, v17.2s, v28.2s // -a2r*w,a2i*w + ext v6.8b, v4.8b, v5.8b, #4 + ext v7.8b, v5.8b, v4.8b, #4 + fmul v27.2s, v19.2s, v27.2s // a3r*w,-a3i*w + fsub v23.2s, v22.2s, v23.2s // i2-i3,r3-r2 + fsub v22.2s, v0.2s, v1.2s // r0-r1,i0-i1 + fmul v24.2s, v17.2s, v28.s[1] // a2r*w,a2i*w + fmul v25.2s, v19.2s, v28.s[1] // a3r*w,a3i*w + fadd v0.2s, v20.2s, v21.2s + fsub v2.2s, v20.2s, v21.2s + fadd v1.2s, v22.2s, v23.2s + rev64 v26.2s, v26.2s + rev64 v27.2s, v27.2s + fsub v3.2s, v22.2s, v23.2s + fsub v6.2s, v6.2s, v7.2s + fadd v24.2s, v24.2s, v26.2s // a2r+a2i,a2i-a2r t1,t2 + fadd v25.2s, v25.2s, v27.2s // a3r-a3i,a3i+a3r t5,t6 + fadd v7.2s, v4.2s, v5.2s + fsub v18.2s, v2.2s, v6.2s + ld1 {v20.4s,v21.4s}, [x0], #32 + ld1 {v22.4s,v23.4s}, [x0], #32 + ext v26.8b, v24.8b, v25.8b, #4 + ext v27.8b, v25.8b, v24.8b, #4 + fadd v2.2s, v2.2s, v6.2s + fsub v16.2s, v0.2s, v7.2s + fadd v5.2s, v25.2s, v24.2s + fsub v4.2s, v26.2s, v27.2s + transpose v24.2d, v25.2d, v20.2d, v22.2d + transpose v26.2d, v27.2d, v21.2d, v23.2d + fadd v0.2s, v0.2s, v7.2s + fsub v17.2s, v1.2s, v5.2s + fsub v19.2s, v3.2s, v4.2s + fadd v3.2s, v3.2s, v4.2s + fadd v1.2s, v1.2s, v5.2s + ext v20.16b, v21.16b, v21.16b, #4 + ext v21.16b, v23.16b, v23.16b, #4 + + zip1 v0.2d, v0.2d, v1.2d // {z[0], z[1]} + zip1 v1.2d, v2.2d, v3.2d // {z[2], z[3]} + zip1 v2.2d, v16.2d, v17.2d // {z[o1], z[o1+1]} + zip1 v3.2d, v18.2d, v19.2d // {z[o1+2],z[o1+3]} + + // 2 x fft4 + transpose v22.2d, v23.2d, v20.2d, v21.2d + + fadd v4.4s, v24.4s, v25.4s + fadd v5.4s, v26.4s, v27.4s + fsub v6.4s, v24.4s, v25.4s + fsub v7.4s, v22.4s, v23.4s + + ld1 {v23.4s}, [x14] + + fadd v24.4s, v4.4s, v5.4s // {z[o2+0],z[o2+1]} + fsub v26.4s, v4.4s, v5.4s // {z[o2+2],z[o2+3]} + fadd v25.4s, v6.4s, v7.4s // {z[o3+0],z[o3+1]} + fsub v27.4s, v6.4s, v7.4s // {z[o3+2],z[o3+3]} + + //fft_pass_neon_16 + rev64 v7.4s, v25.4s + fmul v25.4s, v25.4s, v23.s[1] + fmul v7.4s, v7.4s, v29.4s + fmla v25.4s, v7.4s, v23.s[3] // {t1a,t2a,t5a,t6a} + + zip1 v20.4s, v24.4s, v25.4s + zip2 v21.4s, v24.4s, v25.4s + fneg v22.4s, v20.4s + fadd v4.4s, v21.4s, v20.4s + fsub v6.4s, v20.4s, v21.4s // just the second half + fadd v5.4s, v21.4s, v22.4s // just the first half + + tbl v4.16b, {v4.16b}, v30.16b // trans4_float + tbl v5.16b, {v5.16b,v6.16b}, v31.16b // trans8_float + + fsub v20.4s, v0.4s, v4.4s // {z[o2],z[o2+1]} + fadd v16.4s, v0.4s, v4.4s // {z[0], z[1]} + fsub v22.4s, v2.4s, v5.4s // {z[o3],z[o3+1]} + fadd v18.4s, v2.4s, v5.4s // {z[o1],z[o1+1]} + +//second half + rev64 v6.4s, v26.4s + fmul v26.4s, v26.4s, v23.s[2] + rev64 v7.4s, v27.4s + fmul v27.4s, v27.4s, v23.s[3] + fmul v6.4s, v6.4s, v29.4s + fmul v7.4s, v7.4s, v29.4s + fmla v26.4s, v6.4s, v23.s[2] // {t1,t2,t5,t6} + fmla v27.4s, v7.4s, v23.s[1] // {t1a,t2a,t5a,t6a} + + zip1 v24.4s, v26.4s, v27.4s + zip2 v25.4s, v26.4s, v27.4s + fneg v26.4s, v24.4s + fadd v4.4s, v25.4s, v24.4s + fsub v6.4s, v24.4s, v25.4s // just the second half + fadd v5.4s, v25.4s, v26.4s // just the first half + + tbl v4.16b, {v4.16b}, v30.16b // trans4_float + tbl v5.16b, {v5.16b,v6.16b}, v31.16b // trans8_float + + fadd v17.4s, v1.4s, v4.4s // {z[2], z[3]} + fsub v21.4s, v1.4s, v4.4s // {z[o2+2],z[o2+3]} + fadd v19.4s, v3.4s, v5.4s // {z[o1+2],z[o1+3]} + fsub v23.4s, v3.4s, v5.4s // {z[o3+2],z[o3+3]} + + st1 {v16.4s,v17.4s}, [x1], #32 + st1 {v18.4s,v19.4s}, [x1], #32 + st1 {v20.4s,v21.4s}, [x1], #32 + st1 {v22.4s,v23.4s}, [x1], #32 + + ret +endfunc + + +const trans4_float, align=4 + .byte 0, 1, 2, 3 + .byte 8, 9, 10, 11 + .byte 4, 5, 6, 7 + .byte 12, 13, 14, 15 +endconst + +const trans8_float, align=4 + .byte 24, 25, 26, 27 + .byte 0, 1, 2, 3 + .byte 28, 29, 30, 31 + .byte 4, 5, 6, 7 +endconst + +function fft_pass_neon + sub x6, x2, #1 // n - 1, loop counter + lsl x5, x2, #3 // 2 * n * sizeof FFTSample + lsl x1, x2, #4 // 2 * n * sizeof FFTComplex + add x5, x4, x5 // wim + add x3, x1, x2, lsl #5 // 4 * n * sizeof FFTComplex + add x2, x0, x2, lsl #5 // &z[o2] + add x3, x0, x3 // &z[o3] + add x1, x0, x1 // &z[o1] + ld1 {v20.4s},[x2] // {z[o2],z[o2+1]} + ld1 {v22.4s},[x3] // {z[o3],z[o3+1]} + ld1 {v4.2s}, [x4], #8 // {wre[0],wre[1]} + trn2 v25.2d, v20.2d, v22.2d + sub x5, x5, #4 // wim-- + trn1 v24.2d, v20.2d, v22.2d + ld1 {v5.s}[0], [x5], x7 // d5[0] = wim[-1] + rev64 v7.4s, v25.4s + fmul v25.4s, v25.4s, v4.s[1] + ld1 {v16.4s}, [x0] // {z[0],z[1]} + fmul v7.4s, v7.4s, v29.4s + ld1 {v17.4s}, [x1] // {z[o1],z[o1+1]} + prfm pldl1keep, [x2, #16] + prfm pldl1keep, [x3, #16] + fmla v25.4s, v7.4s, v5.s[0] // {t1a,t2a,t5a,t6a} + prfm pldl1keep, [x0, #16] + prfm pldl1keep, [x1, #16] + + zip1 v20.4s, v24.4s, v25.4s + zip2 v21.4s, v24.4s, v25.4s + fneg v22.4s, v20.4s + fadd v4.4s, v21.4s, v20.4s + fsub v6.4s, v20.4s, v21.4s // just the second half + fadd v5.4s, v21.4s, v22.4s // just the first half + + tbl v4.16b, {v4.16b}, v30.16b // trans4_float + tbl v5.16b, {v5.16b,v6.16b}, v31.16b // trans8_float + + fadd v20.4s, v16.4s, v4.4s + fsub v22.4s, v16.4s, v4.4s + fadd v21.4s, v17.4s, v5.4s + st1 {v20.4s}, [x0], #16 // {z[0], z[1]} + fsub v23.4s, v17.4s, v5.4s + + st1 {v21.4s}, [x1], #16 // {z[o1],z[o1+1]} + st1 {v22.4s}, [x2], #16 // {z[o2],z[o2+1]} + st1 {v23.4s}, [x3], #16 // {z[o3],z[o3+1]} +1: + ld1 {v20.4s},[x2] // {z[o2],z[o2+1]} + ld1 {v22.4s},[x3] // {z[o3],z[o3+1]} + ld1 {v4.2s}, [x4], #8 // {wre[0],wre[1]} + transpose v26.2d, v27.2d, v20.2d, v22.2d + ld1 {v5.2s}, [x5], x7 // {wim[-1],wim[0]} + rev64 v6.4s, v26.4s + fmul v26.4s, v26.4s, v4.s[0] + rev64 v7.4s, v27.4s + fmul v27.4s, v27.4s, v4.s[1] + fmul v6.4s, v6.4s, v29.4s + fmul v7.4s, v7.4s, v29.4s + ld1 {v16.4s},[x0] // {z[0],z[1]} + fmla v26.4s, v6.4s, v5.s[1] // {t1,t2,t5,t6} + fmla v27.4s, v7.4s, v5.s[0] // {t1a,t2a,t5a,t6a} + ld1 {v17.4s},[x1] // {z[o1],z[o1+1]} + + subs x6, x6, #1 // n-- + + zip1 v20.4s, v26.4s, v27.4s + zip2 v21.4s, v26.4s, v27.4s + fneg v22.4s, v20.4s + fadd v4.4s, v21.4s, v20.4s + fsub v6.4s, v20.4s, v21.4s // just the second half + fadd v5.4s, v21.4s, v22.4s // just the first half + + tbl v4.16b, {v4.16b}, v30.16b // trans4_float + tbl v5.16b, {v5.16b,v6.16b}, v31.16b // trans8_float + + fadd v20.4s, v16.4s, v4.4s + fsub v22.4s, v16.4s, v4.4s + fadd v21.4s, v17.4s, v5.4s + st1 {v20.4s}, [x0], #16 // {z[0], z[1]} + fsub v23.4s, v17.4s, v5.4s + + st1 {v21.4s}, [x1], #16 // {z[o1],z[o1+1]} + st1 {v22.4s}, [x2], #16 // {z[o2],z[o2+1]} + st1 {v23.4s}, [x3], #16 // {z[o3],z[o3+1]} + b.ne 1b + + ret +endfunc + +.macro def_fft n, n2, n4 +function fft\n\()_neon, align=6 + AARCH64_VALID_JUMP_TARGET + AARCH64_SIGN_LINK_REGISTER + stp x28, x30, [sp, #-16]! + add x28, x0, #\n4*2*8 + bl fft\n2\()_neon + mov x0, x28 + bl fft\n4\()_neon + add x0, x28, #\n4*1*8 + bl fft\n4\()_neon + sub x0, x28, #\n4*2*8 + ldp x28, x30, [sp], #16 + AARCH64_VALIDATE_LINK_REGISTER + movrel x4, X(ff_cos_\n) + mov x2, #\n4>>1 + b fft_pass_neon +endfunc +.endm + + def_fft 32, 16, 8 + def_fft 64, 32, 16 + def_fft 128, 64, 32 + def_fft 256, 128, 64 + def_fft 512, 256, 128 + def_fft 1024, 512, 256 + def_fft 2048, 1024, 512 + def_fft 4096, 2048, 1024 + def_fft 8192, 4096, 2048 + def_fft 16384, 8192, 4096 + def_fft 32768, 16384, 8192 + def_fft 65536, 32768, 16384 + +function ff_fft_calc_neon, export=1 + prfm pldl1keep, [x1] + movrel x10, trans4_float + ldr w2, [x0] + movrel x11, trans8_float + sub w2, w2, #2 + movrel x3, fft_tab_neon + ld1 {v30.16b}, [x10] + mov x7, #-8 + movrel x12, pmmp + ldr x3, [x3, x2, lsl #3] + movrel x13, mppm + movrel x14, X(ff_cos_16) + ld1 {v31.16b}, [x11] + mov x0, x1 + ld1 {v29.4s}, [x12] // pmmp + ld1 {v28.4s}, [x13] + br x3 +endfunc + +function ff_fft_permute_neon, export=1 + mov x6, #1 + ldr w2, [x0] // nbits + ldr x3, [x0, #16] // tmp_buf + ldr x0, [x0, #8] // revtab + lsl x6, x6, x2 + mov x2, x6 +1: + ld1 {v0.2s,v1.2s}, [x1], #16 + ldr w4, [x0], #4 + uxth w5, w4 + lsr w4, w4, #16 + add x5, x3, x5, lsl #3 + add x4, x3, x4, lsl #3 + st1 {v0.2s}, [x5] + st1 {v1.2s}, [x4] + subs x6, x6, #2 + b.gt 1b + + sub x1, x1, x2, lsl #3 +1: + ld1 {v0.4s,v1.4s}, [x3], #32 + st1 {v0.4s,v1.4s}, [x1], #32 + subs x2, x2, #4 + b.gt 1b + + ret +endfunc + +const fft_tab_neon, relocate=1 + .quad fft4_neon + .quad fft8_neon + .quad fft16_neon + .quad fft32_neon + .quad fft64_neon + .quad fft128_neon + .quad fft256_neon + .quad fft512_neon + .quad fft1024_neon + .quad fft2048_neon + .quad fft4096_neon + .quad fft8192_neon + .quad fft16384_neon + .quad fft32768_neon + .quad fft65536_neon +endconst + +const pmmp, align=4 + .float +1.0, -1.0, -1.0, +1.0 +endconst + +const mppm, align=4 + .float -M_SQRT1_2, M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2 +endconst |