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648 lines
22 KiB
ArmAsm
648 lines
22 KiB
ArmAsm
/*
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* Copyright (c) 2014 Janne Grunau <janne-libav@jannau.net>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/aarch64/asm.S"
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#include "asm-offsets.h"
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.macro shuffle a, b, c, d
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const shuffle_\a\b\c\d, align=4
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.byte (\a * 4), (\a * 4 + 1), (\a * 4 + 2), (\a * 4 + 3)
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.byte (\b * 4), (\b * 4 + 1), (\b * 4 + 2), (\b * 4 + 3)
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.byte (\c * 4), (\c * 4 + 1), (\c * 4 + 2), (\c * 4 + 3)
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.byte (\d * 4), (\d * 4 + 1), (\d * 4 + 2), (\d * 4 + 3)
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endconst
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.endm
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shuffle 0, 2, 1, 3
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shuffle 1, 0, 3, 2
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shuffle 2, 3, 0, 1
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shuffle 3, 1, 2, 0
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function fft5_neon
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lsl x2, x2, #3
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ld1 {v24.2s}, [x1], x2
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ld2 {v25.s,v26.s}[0], [x1], x2
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ld2 {v25.s,v26.s}[1], [x1], x2
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ld2 {v25.s,v26.s}[2], [x1], x2
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ld2 {v25.s,v26.s}[3], [x1]
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dup v6.4s, v24.s[0]
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dup v7.4s, v24.s[1]
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faddp v0.4s, v25.4s, v26.4s
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// z[][0], z[][3]
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fmul v16.4s, v25.4s, v15.s[0] // rr
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fmul v17.4s, v25.4s, v15.s[1] // ri
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fmul v18.4s, v26.4s, v15.s[0] // ir
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fmul v19.4s, v26.4s, v15.s[1] // ii
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faddp v0.4s, v0.4s, v0.4s
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// z[][1], z[][2]
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fmul v20.4s, v25.4s, v15.s[2] // rr
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fmul v21.4s, v25.4s, v15.s[3] // ri
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fmul v22.4s, v26.4s, v15.s[2] // ir
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fmul v23.4s, v26.4s, v15.s[3] // ii
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fadd v0.2s, v24.2s, v0.2s // out[0]
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// z[0123][0], z[0123][3]
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fsub v24.4s, v16.4s, v19.4s // (c).re = rr - ii;
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fadd v27.4s, v16.4s, v19.4s // (d).re = rr + ii;
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ld1 {v16.16b}, [x11]
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ld1 {v19.16b}, [x14]
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fadd v28.4s, v17.4s, v18.4s // (c).im = ri + ir;
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fsub v31.4s, v18.4s, v17.4s // (d).im = -ri + ir;
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ld1 {v17.16b}, [x12]
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// z[0123][1], z[0123][2]
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fsub v25.4s, v20.4s, v23.4s // (c).re = rr - ii;
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fadd v26.4s, v20.4s, v23.4s // (d).re = rr + ii;
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ld1 {v18.16b}, [x13]
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fadd v29.4s, v21.4s, v22.4s // (c).im = ri + ir;
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fsub v30.4s, v22.4s, v21.4s // (d).im = -ri + ir;
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//real
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tbl v20.16b, {v24.16b}, v16.16b
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tbl v21.16b, {v25.16b}, v17.16b
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tbl v22.16b, {v26.16b}, v18.16b
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tbl v23.16b, {v27.16b}, v19.16b
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//imag
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tbl v16.16b, {v28.16b}, v16.16b
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tbl v17.16b, {v29.16b}, v17.16b
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tbl v18.16b, {v30.16b}, v18.16b
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tbl v19.16b, {v31.16b}, v19.16b
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fadd v6.4s, v6.4s, v20.4s
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fadd v22.4s, v22.4s, v23.4s
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fadd v7.4s, v7.4s, v16.4s
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fadd v18.4s, v18.4s, v19.4s
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fadd v21.4s, v21.4s, v22.4s
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fadd v17.4s, v17.4s, v18.4s
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fadd v6.4s, v6.4s, v21.4s
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fadd v7.4s, v7.4s, v17.4s
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ret
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endfunc
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function fft15_neon
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mov x8, x1
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mov x9, x30
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add x2, x3, x3, lsl #1 // 3 * stride
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add x1, x8, x3, lsl #3 // in + 1 * stride
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bl fft5_neon
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mov v1.8b, v0.8b
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mov v2.16b, v6.16b
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mov v3.16b, v7.16b
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add x1, x8, x3, lsl #4 // in + 2 * stride
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add x2, x3, x3, lsl #1 // 3 * stride
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bl fft5_neon
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zip1 v1.4s, v1.4s, v0.4s
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mov v4.16b, v6.16b
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mov v5.16b, v7.16b
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mov x1, x8 // in + 0 * stride
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add x2, x3, x3, lsl #1 // 3 * stride
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bl fft5_neon
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faddp v20.4s, v1.4s, v1.4s
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ext v18.16b, v8.16b, v8.16b, #4
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ext v19.16b, v9.16b, v9.16b, #4
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mov v16.16b, v6.16b
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mov v17.16b, v7.16b
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fadd v20.2s, v20.2s, v0.2s
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uzp1 v18.4s, v18.4s, v10.4s // exp[2,4,6,8].re
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uzp1 v19.4s, v19.4s, v11.4s // exp[2,4,6,8].im
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st1 {v20.2s}, [x0], #8 // out[0]
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fmla v16.4s, v2.4s, v8.4s
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fmls v16.4s, v3.4s, v9.4s
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fmla v17.4s, v2.4s, v9.4s
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fmla v17.4s, v3.4s, v8.4s
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fmla v16.4s, v4.4s, v18.4s
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fmls v16.4s, v5.4s, v19.4s
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fmla v17.4s, v4.4s, v19.4s
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fmla v17.4s, v5.4s, v18.4s
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zip1 v18.4s, v16.4s, v17.4s
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zip2 v19.4s, v16.4s, v17.4s
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rev64 v31.4s, v14.4s
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trn1 v28.2d, v1.2d, v1.2d
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trn2 v29.2d, v1.2d, v1.2d
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zip1 v30.2d, v14.2d, v31.2d
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zip2 v31.2d, v14.2d, v31.2d
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st1 {v18.4s,v19.4s}, [x0], #32 // out[1-4]
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fmul v16.4s, v28.4s, v30.4s
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fmul v17.4s, v29.4s, v30.4s
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fmls v16.4s, v29.4s, v31.4s
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fmla v17.4s, v28.4s, v31.4s
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faddp v16.4s, v16.4s, v16.4s
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faddp v17.4s, v17.4s, v17.4s
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zip1 v18.2s, v16.2s, v17.2s
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zip2 v19.2s, v16.2s, v17.2s
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fadd v18.2s, v18.2s, v0.2s
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fadd v0.2s, v19.2s, v0.2s
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ext v30.16b, v12.16b, v12.16b, #4
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ext v31.16b, v13.16b, v13.16b, #4
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mov v16.16b, v6.16b
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mov v17.16b, v7.16b
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uzp1 v30.4s, v30.4s, v8.4s
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uzp1 v31.4s, v31.4s, v9.4s
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st1 {v18.2s}, [x0], #8 // out[5]
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fmla v16.4s, v2.4s, v10.4s
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fmls v16.4s, v3.4s, v11.4s
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fmla v17.4s, v2.4s, v11.4s
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fmla v17.4s, v3.4s, v10.4s
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fmla v16.4s, v4.4s, v30.4s
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fmls v16.4s, v5.4s, v31.4s
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fmla v17.4s, v4.4s, v31.4s
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fmla v17.4s, v5.4s, v30.4s
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zip1 v18.4s, v16.4s, v17.4s
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zip2 v19.4s, v16.4s, v17.4s
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ext v30.16b, v10.16b, v10.16b, #4
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ext v31.16b, v11.16b, v11.16b, #4
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fmla v6.4s, v2.4s, v12.4s
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fmls v6.4s, v3.4s, v13.4s
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st1 {v18.4s,v19.4s}, [x0], #32 // out[6-9]
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uzp1 v30.4s, v30.4s, v12.4s
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uzp1 v31.4s, v31.4s, v13.4s
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fmla v7.4s, v2.4s, v13.4s
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fmla v7.4s, v3.4s, v12.4s
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st1 {v0.2s}, [x0], #8 // out[10]
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fmla v6.4s, v4.4s, v30.4s
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fmls v6.4s, v5.4s, v31.4s
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fmla v7.4s, v4.4s, v31.4s
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fmla v7.4s, v5.4s, v30.4s
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zip1 v18.4s, v6.4s, v7.4s
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zip2 v19.4s, v6.4s, v7.4s
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st1 {v18.4s,v19.4s}, [x0], #32 // out[11-14]
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ret x9
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endfunc
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// x0: out, x1: out+len2, x2: exptab, x3: len2
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function fft15_pass
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ands x6, x3, #3
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mov x4, x0
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mov x5, x1
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b.eq 9f
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ld1 {v0.2s}, [x0], #8
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ld1 {v1.2s}, [x1], #8
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sub x3, x3, x6
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subs x6, x6, #1
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fadd v2.2s, v0.2s, v1.2s
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fsub v3.2s, v0.2s, v1.2s
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add x2, x2, #8
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st1 {v2.2s}, [x4], #8
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st1 {v3.2s}, [x5], #8
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b.eq 9f
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1:
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subs x6, x6, #1
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ldp s4, s5, [x2], #8
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ldp s2, s3, [x1], #8
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ldp s0, s1, [x0], #8
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fmul s6, s2, s4
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fmul s7, s2, s5
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fmls s6, s3, v5.s[0]
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fmla s7, s3, v4.s[0]
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fsub s2, s0, s6
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fsub s3, s1, s7
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fadd s0, s0, s6
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fadd s1, s1, s7
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stp s2, s3, [x5], #8
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stp s0, s1, [x4], #8
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b.gt 1b
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9:
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ld1 {v4.4s,v5.4s}, [x2], #32
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ld2 {v2.4s,v3.4s}, [x1], #32
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uzp1 v6.4s, v4.4s, v5.4s
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uzp2 v7.4s, v4.4s, v5.4s
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ld2 {v0.4s,v1.4s}, [x0], #32
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8:
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subs x3, x3, #8
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fmul v4.4s, v2.4s, v6.4s
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fmul v5.4s, v2.4s, v7.4s
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b.lt 4f
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ld1 {v18.4s,v19.4s}, [x2], #32
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fmls v4.4s, v3.4s, v7.4s
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fmla v5.4s, v3.4s, v6.4s
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ld2 {v22.4s,v23.4s}, [x1], #32
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fsub v2.4s, v0.4s, v4.4s
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fadd v0.4s, v0.4s, v4.4s
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fsub v3.4s, v1.4s, v5.4s
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fadd v1.4s, v1.4s, v5.4s
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uzp1 v16.4s, v18.4s, v19.4s
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uzp2 v17.4s, v18.4s, v19.4s
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st2 {v2.4s,v3.4s}, [x5], #32
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st2 {v0.4s,v1.4s}, [x4], #32
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ld2 {v20.4s,v21.4s}, [x0], #32
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fmul v18.4s, v22.4s, v16.4s
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fmul v19.4s, v22.4s, v17.4s
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b.eq 0f
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ld1 {v4.4s,v5.4s}, [x2], #32
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fmls v18.4s, v23.4s, v17.4s
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fmla v19.4s, v23.4s, v16.4s
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ld2 {v2.4s,v3.4s}, [x1], #32
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fsub v22.4s, v20.4s, v18.4s
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fadd v20.4s, v20.4s, v18.4s
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fsub v23.4s, v21.4s, v19.4s
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fadd v21.4s, v21.4s, v19.4s
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uzp1 v6.4s, v4.4s, v5.4s
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uzp2 v7.4s, v4.4s, v5.4s
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st2 {v22.4s,v23.4s}, [x5], #32
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st2 {v20.4s,v21.4s}, [x4], #32
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ld2 {v0.4s,v1.4s}, [x0], #32
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b 8b
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4:
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fmls v4.4s, v3.4s, v7.4s
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fmla v5.4s, v3.4s, v6.4s
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fsub v2.4s, v0.4s, v4.4s
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fadd v0.4s, v0.4s, v4.4s
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fsub v3.4s, v1.4s, v5.4s
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fadd v1.4s, v1.4s, v5.4s
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st2 {v2.4s,v3.4s}, [x5], #32
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st2 {v0.4s,v1.4s}, [x4], #32
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ret
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0:
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fmls v18.4s, v23.4s, v17.4s
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fmla v19.4s, v23.4s, v16.4s
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fsub v22.4s, v20.4s, v18.4s
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fadd v20.4s, v20.4s, v18.4s
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fsub v23.4s, v21.4s, v19.4s
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fadd v21.4s, v21.4s, v19.4s
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st2 {v22.4s,v23.4s}, [x5], #32
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st2 {v20.4s,v21.4s}, [x4], #32
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ret
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endfunc
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function fft30_neon, align=6
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sub sp, sp, #0x20
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stp x20, x21, [sp]
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stp x22, x30, [sp, #0x10]
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mov x21, x1
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mov x22, x2
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mov x20, x4
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mov x0, x21
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mov x1, x22
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lsl x3, x20, #1
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bl fft15_neon
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add x0, x21, #15*8
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add x1, x22, x20, lsl #3
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lsl x3, x20, #1
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bl fft15_neon
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ldr x2, [x10, #(CELT_EXPTAB + 8)] // s->exptab[1]
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add x0, x21, #0
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add x1, x21, #15*8
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mov x3, #15
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ldp x20, x21, [sp]
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ldp x22, x30, [sp, #0x10]
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add sp, sp, #0x20
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b fft15_pass
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endfunc
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.macro def_fft n, n2
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function fft\n\()_neon, align=6
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sub sp, sp, #0x30
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stp x20, x21, [sp]
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stp x22, x30, [sp, #0x10]
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stp x23, x24, [sp, #0x20]
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mov x21, x1
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mov x22, x2
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mov x23, x3
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mov x20, x4
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sub x3, x3, #1
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lsl x4, x4, #1
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bl fft\n2\()_neon
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add x1, x21, #(\n2 * 8)
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add x2, x22, x20, lsl #3
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sub x3, x23, #1
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lsl x4, x20, #1
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bl fft\n2\()_neon
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add x5, x10, #CELT_EXPTAB
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mov x0, x21
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ldr x2, [x5, x23, lsl #3] // s->exptab[N]
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add x1, x21, #(\n2 * 8)
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mov x3, #\n2
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ldp x20, x21, [sp]
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ldp x22, x30, [sp, #0x10]
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ldp x23, x24, [sp, #0x20]
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add sp, sp, #0x30
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b fft15_pass
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endfunc
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.endm
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def_fft 60, 30
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|
def_fft 120, 60
|
|
def_fft 240, 120
|
|
def_fft 480, 240
|
|
def_fft 960, 480
|
|
|
|
function fft_b15_calc_neon
|
|
sub sp, sp, #0x50
|
|
ldr x8, [x0, #CELT_EXPTAB] // s->exptab[0]
|
|
movrel x6, fact5
|
|
movrel x11, shuffle_0213
|
|
movrel x12, shuffle_1032
|
|
movrel x13, shuffle_2301
|
|
movrel x14, shuffle_3120
|
|
add x8, x8, #8
|
|
movrel x5, fft_tab_neon
|
|
stp x20, x30, [sp]
|
|
stp d8, d9, [sp, #0x10]
|
|
stp d10, d11, [sp, #0x20]
|
|
stp d12, d13, [sp, #0x30]
|
|
stp d14, d15, [sp, #0x40]
|
|
ld1 {v15.4s}, [x6]
|
|
ld1 {v0.4s,v1.4s}, [x8], #32
|
|
ld1 {v6.2s}, [x8], #8
|
|
ld1 {v2.4s,v3.4s}, [x8], #32
|
|
ld1 {v7.2s}, [x8], #8
|
|
ld1 {v4.4s,v5.4s}, [x8], #32
|
|
uzp1 v8.4s, v0.4s, v1.4s // exp[ 1 - 4].re
|
|
uzp2 v9.4s, v0.4s, v1.4s // exp[ 1 - 4].im
|
|
uzp1 v10.4s, v2.4s, v3.4s // exp[ 6 - 9].re
|
|
uzp2 v11.4s, v2.4s, v3.4s // exp[ 6 - 9].im
|
|
uzp1 v12.4s, v4.4s, v5.4s // exp[11 - 14].re
|
|
uzp2 v13.4s, v4.4s, v5.4s // exp[11 - 14].im
|
|
zip1 v14.4s, v6.4s, v7.4s // exp[5,10].re/exp[5,10].im
|
|
add x5, x5, x3, lsl #3
|
|
ldr x5, [x5]
|
|
mov x10, x0
|
|
blr x5
|
|
ldp x20, x30, [sp]
|
|
ldp d8, d9, [sp, #0x10]
|
|
ldp d10, d11, [sp, #0x20]
|
|
ldp d12, d13, [sp, #0x30]
|
|
ldp d14, d15, [sp, #0x40]
|
|
add sp, sp, #0x50
|
|
ret
|
|
endfunc
|
|
|
|
const fft_tab_neon, relocate=1
|
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.quad fft15_neon
|
|
.quad fft30_neon
|
|
.quad fft60_neon
|
|
.quad fft120_neon
|
|
.quad fft240_neon
|
|
.quad fft480_neon
|
|
.quad fft960_neon
|
|
endconst
|
|
|
|
function ff_celt_imdct_half_neon, export=1
|
|
sub sp, sp, #0x20
|
|
stp x21, x30, [sp]
|
|
str s0, [sp, #0x10]
|
|
|
|
ldp w5, w6, [x0, #CELT_LEN2] // CELT_LEN4
|
|
mov x10, x0
|
|
mov x21, x1
|
|
sub w5, w5, #1
|
|
lsl x7, x3, #3 // 2 * stride * sizeof(float)
|
|
sub x8, xzr, x3, lsl #3 // -2 * stride * sizeof(float)
|
|
mul x5, x5, x3
|
|
ldp x9, x10, [x0, #CELT_TMP] // CELT_TWIDDLE
|
|
ldr w3, [x0, #CELT_FFT_N]
|
|
add x5, x2, x5, lsl #2
|
|
mov x11, x9
|
|
|
|
sub w6, w6, #4
|
|
ld1 {v0.s}[0], [x5], x8
|
|
ld1 {v1.s}[0], [x2], x7
|
|
ld1 {v4.4s,v5.4s}, [x10], #32
|
|
ld1 {v0.s}[1], [x5], x8
|
|
ld1 {v1.s}[1], [x2], x7
|
|
uzp1 v2.4s, v4.4s, v5.4s
|
|
ld1 {v0.s}[2], [x5], x8
|
|
ld1 {v1.s}[2], [x2], x7
|
|
uzp2 v3.4s, v4.4s, v5.4s
|
|
ld1 {v0.s}[3], [x5], x8
|
|
ld1 {v1.s}[3], [x2], x7
|
|
1:
|
|
subs w6, w6, #4
|
|
|
|
ld1 {v20.s}[0], [x5], x8
|
|
ld1 {v21.s}[0], [x2], x7
|
|
ld1 {v4.4s,v5.4s}, [x10], #32
|
|
|
|
fmul v6.4s, v0.4s, v2.4s
|
|
fmul v7.4s, v0.4s, v3.4s
|
|
|
|
ld1 {v20.s}[1], [x5], x8
|
|
ld1 {v21.s}[1], [x2], x7
|
|
|
|
fmls v6.4s, v1.4s, v3.4s
|
|
fmla v7.4s, v1.4s, v2.4s
|
|
|
|
ld1 {v20.s}[2], [x5], x8
|
|
ld1 {v21.s}[2], [x2], x7
|
|
|
|
uzp1 v2.4s, v4.4s, v5.4s
|
|
uzp2 v3.4s, v4.4s, v5.4s
|
|
ld1 {v20.s}[3], [x5], x8
|
|
ld1 {v21.s}[3], [x2], x7
|
|
|
|
zip1 v4.4s, v6.4s, v7.4s
|
|
zip2 v5.4s, v6.4s, v7.4s
|
|
|
|
fmul v6.4s, v20.4s, v2.4s
|
|
fmul v7.4s, v20.4s, v3.4s
|
|
|
|
st1 {v4.4s,v5.4s}, [x9], #32
|
|
|
|
fmls v6.4s, v21.4s, v3.4s
|
|
fmla v7.4s, v21.4s, v2.4s
|
|
|
|
b.eq 3f
|
|
|
|
subs w6, w6, #4
|
|
ld1 {v4.4s,v5.4s}, [x10], #32
|
|
ld1 {v0.s}[0], [x5], x8
|
|
ld1 {v1.s}[0], [x2], x7
|
|
uzp1 v2.4s, v4.4s, v5.4s
|
|
ld1 {v0.s}[1], [x5], x8
|
|
ld1 {v1.s}[1], [x2], x7
|
|
uzp2 v3.4s, v4.4s, v5.4s
|
|
ld1 {v0.s}[2], [x5], x8
|
|
ld1 {v1.s}[2], [x2], x7
|
|
zip1 v4.4s, v6.4s, v7.4s
|
|
zip2 v5.4s, v6.4s, v7.4s
|
|
ld1 {v0.s}[3], [x5], x8
|
|
ld1 {v1.s}[3], [x2], x7
|
|
|
|
st1 {v4.4s,v5.4s}, [x9], #32
|
|
|
|
b.gt 1b
|
|
|
|
fmul v6.4s, v0.4s, v2.4s
|
|
fmul v7.4s, v0.4s, v3.4s
|
|
fmls v6.4s, v1.4s, v3.4s
|
|
fmla v7.4s, v1.4s, v2.4s
|
|
3:
|
|
zip1 v4.4s, v6.4s, v7.4s
|
|
zip2 v5.4s, v6.4s, v7.4s
|
|
st1 {v4.4s,v5.4s}, [x9], #32
|
|
|
|
mov x2, x11
|
|
mov x4, #1
|
|
|
|
bl fft_b15_calc_neon
|
|
|
|
ldr w5, [x10, #CELT_LEN4]
|
|
ldr x6, [x10, #CELT_TWIDDLE]
|
|
ldr s31, [sp, #0x10]
|
|
|
|
add x1, x21, x5, lsl #2
|
|
add x3, x6, x5, lsl #2
|
|
sub x0, x1, #16
|
|
sub x2, x3, #16
|
|
mov x8, #-16
|
|
mov x7, #16
|
|
mov x10, x0
|
|
mov x11, x1
|
|
|
|
sub w5, w5, #4
|
|
|
|
ld1 {v0.4s}, [x0], x8
|
|
ld1 {v1.4s}, [x1], x7
|
|
ld1 {v2.4s}, [x2], x8
|
|
ld1 {v3.4s}, [x3], x7
|
|
|
|
uzp1 v4.4s, v0.4s, v1.4s // z[-i-2, -i-1, +i, i+1].re
|
|
uzp2 v6.4s, v0.4s, v1.4s // z[-i-2, -i-1, +i, i+1].im
|
|
|
|
uzp1 v5.4s, v2.4s, v3.4s // twidlle_exptab[-i-2, -i-1, +i, i+1].re
|
|
uzp2 v7.4s, v2.4s, v3.4s // twidlle_exptab[-i-2, -i-1, +i, i+1].im
|
|
|
|
fmul v1.4s, v6.4s, v5.4s
|
|
fmul v0.4s, v6.4s, v7.4s
|
|
2:
|
|
subs w5, w5, #4
|
|
|
|
ld1 {v20.4s}, [x0], x8
|
|
|
|
fmla v1.4s, v4.4s, v7.4s
|
|
fmls v0.4s, v4.4s, v5.4s
|
|
|
|
ld1 {v21.4s}, [x1], x7
|
|
|
|
ext v1.16b, v1.16b, v1.16b, #8
|
|
fmul v0.4s, v0.4s, v31.s[0]
|
|
|
|
ld1 {v2.4s}, [x2], x8
|
|
|
|
rev64 v1.4s, v1.4s
|
|
fmul v1.4s, v1.4s, v31.s[0]
|
|
|
|
ld1 {v3.4s}, [x3], x7
|
|
|
|
zip1 v5.4s, v0.4s, v1.4s
|
|
zip2 v7.4s, v0.4s, v1.4s
|
|
|
|
uzp1 v4.4s, v20.4s, v21.4s // z[-i-2, -i-1, +i, i+1].re
|
|
uzp2 v6.4s, v20.4s, v21.4s // z[-i-2, -i-1, +i, i+1].im
|
|
|
|
st1 {v5.4s}, [x10], x8
|
|
st1 {v7.4s}, [x11], x7
|
|
|
|
uzp1 v5.4s, v2.4s, v3.4s // twidlle_exptab[-i-2, -i-1, +i, i+1].re
|
|
uzp2 v7.4s, v2.4s, v3.4s // twidlle_exptab[-i-2, -i-1, +i, i+1].im
|
|
|
|
fmul v1.4s, v6.4s, v5.4s
|
|
fmul v0.4s, v6.4s, v7.4s
|
|
b.gt 2b
|
|
|
|
fmla v1.4s, v4.4s, v7.4s
|
|
fmls v0.4s, v4.4s, v5.4s
|
|
ext v1.16b, v1.16b, v1.16b, #8
|
|
fmul v0.4s, v0.4s, v31.s[0]
|
|
rev64 v1.4s, v1.4s
|
|
fmul v1.4s, v1.4s, v31.s[0]
|
|
zip1 v5.4s, v0.4s, v1.4s
|
|
zip2 v7.4s, v0.4s, v1.4s
|
|
st1 {v5.4s}, [x10], x8
|
|
st1 {v7.4s}, [x11], x7
|
|
|
|
ldp x21, x30, [sp]
|
|
add sp, sp, #0x20
|
|
ret
|
|
endfunc
|
|
|
|
// [0] = exp(2 * i * pi / 5), [1] = exp(2 * i * pi * 2 / 5)
|
|
const fact5, align=4
|
|
.float 0.30901699437494745, 0.95105651629515353
|
|
.float -0.80901699437494734, 0.58778525229247325
|
|
endconst
|