| /* |
| * Copyright (c) 2014 Janne Grunau <janne-libav@jannau.net> |
| * |
| * 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" |
| |
| #include "asm-offsets.h" |
| |
| .macro shuffle a, b, c, d |
| const shuffle_\a\b\c\d, align=4 |
| .byte (\a * 4), (\a * 4 + 1), (\a * 4 + 2), (\a * 4 + 3) |
| .byte (\b * 4), (\b * 4 + 1), (\b * 4 + 2), (\b * 4 + 3) |
| .byte (\c * 4), (\c * 4 + 1), (\c * 4 + 2), (\c * 4 + 3) |
| .byte (\d * 4), (\d * 4 + 1), (\d * 4 + 2), (\d * 4 + 3) |
| endconst |
| .endm |
| |
| shuffle 0, 2, 1, 3 |
| shuffle 1, 0, 3, 2 |
| shuffle 2, 3, 0, 1 |
| shuffle 3, 1, 2, 0 |
| |
| |
| function fft5_neon |
| lsl x2, x2, #3 |
| ld1 {v24.2s}, [x1], x2 |
| ld2 {v25.s,v26.s}[0], [x1], x2 |
| ld2 {v25.s,v26.s}[1], [x1], x2 |
| ld2 {v25.s,v26.s}[2], [x1], x2 |
| ld2 {v25.s,v26.s}[3], [x1] |
| dup v6.4s, v24.s[0] |
| dup v7.4s, v24.s[1] |
| |
| faddp v0.4s, v25.4s, v26.4s |
| // z[][0], z[][3] |
| fmul v16.4s, v25.4s, v15.s[0] // rr |
| fmul v17.4s, v25.4s, v15.s[1] // ri |
| fmul v18.4s, v26.4s, v15.s[0] // ir |
| fmul v19.4s, v26.4s, v15.s[1] // ii |
| faddp v0.4s, v0.4s, v0.4s |
| // z[][1], z[][2] |
| fmul v20.4s, v25.4s, v15.s[2] // rr |
| fmul v21.4s, v25.4s, v15.s[3] // ri |
| fmul v22.4s, v26.4s, v15.s[2] // ir |
| fmul v23.4s, v26.4s, v15.s[3] // ii |
| fadd v0.2s, v24.2s, v0.2s // out[0] |
| |
| // z[0123][0], z[0123][3] |
| fsub v24.4s, v16.4s, v19.4s // (c).re = rr - ii; |
| fadd v27.4s, v16.4s, v19.4s // (d).re = rr + ii; |
| ld1 {v16.16b}, [x11] |
| ld1 {v19.16b}, [x14] |
| fadd v28.4s, v17.4s, v18.4s // (c).im = ri + ir; |
| fsub v31.4s, v18.4s, v17.4s // (d).im = -ri + ir; |
| ld1 {v17.16b}, [x12] |
| // z[0123][1], z[0123][2] |
| fsub v25.4s, v20.4s, v23.4s // (c).re = rr - ii; |
| fadd v26.4s, v20.4s, v23.4s // (d).re = rr + ii; |
| ld1 {v18.16b}, [x13] |
| fadd v29.4s, v21.4s, v22.4s // (c).im = ri + ir; |
| fsub v30.4s, v22.4s, v21.4s // (d).im = -ri + ir; |
| |
| //real |
| tbl v20.16b, {v24.16b}, v16.16b |
| tbl v21.16b, {v25.16b}, v17.16b |
| tbl v22.16b, {v26.16b}, v18.16b |
| tbl v23.16b, {v27.16b}, v19.16b |
| //imag |
| tbl v16.16b, {v28.16b}, v16.16b |
| tbl v17.16b, {v29.16b}, v17.16b |
| tbl v18.16b, {v30.16b}, v18.16b |
| tbl v19.16b, {v31.16b}, v19.16b |
| |
| fadd v6.4s, v6.4s, v20.4s |
| fadd v22.4s, v22.4s, v23.4s |
| fadd v7.4s, v7.4s, v16.4s |
| fadd v18.4s, v18.4s, v19.4s |
| |
| fadd v21.4s, v21.4s, v22.4s |
| fadd v17.4s, v17.4s, v18.4s |
| fadd v6.4s, v6.4s, v21.4s |
| fadd v7.4s, v7.4s, v17.4s |
| |
| ret |
| endfunc |
| |
| function fft15_neon |
| mov x8, x1 |
| mov x9, x30 |
| add x2, x3, x3, lsl #1 // 3 * stride |
| |
| add x1, x8, x3, lsl #3 // in + 1 * stride |
| bl fft5_neon |
| mov v1.8b, v0.8b |
| mov v2.16b, v6.16b |
| mov v3.16b, v7.16b |
| |
| add x1, x8, x3, lsl #4 // in + 2 * stride |
| add x2, x3, x3, lsl #1 // 3 * stride |
| bl fft5_neon |
| zip1 v1.4s, v1.4s, v0.4s |
| mov v4.16b, v6.16b |
| mov v5.16b, v7.16b |
| |
| mov x1, x8 // in + 0 * stride |
| add x2, x3, x3, lsl #1 // 3 * stride |
| bl fft5_neon |
| |
| faddp v20.4s, v1.4s, v1.4s |
| |
| ext v18.16b, v8.16b, v8.16b, #4 |
| ext v19.16b, v9.16b, v9.16b, #4 |
| mov v16.16b, v6.16b |
| mov v17.16b, v7.16b |
| fadd v20.2s, v20.2s, v0.2s |
| |
| uzp1 v18.4s, v18.4s, v10.4s // exp[2,4,6,8].re |
| uzp1 v19.4s, v19.4s, v11.4s // exp[2,4,6,8].im |
| |
| st1 {v20.2s}, [x0], #8 // out[0] |
| |
| fmla v16.4s, v2.4s, v8.4s |
| fmls v16.4s, v3.4s, v9.4s |
| |
| fmla v17.4s, v2.4s, v9.4s |
| fmla v17.4s, v3.4s, v8.4s |
| |
| fmla v16.4s, v4.4s, v18.4s |
| fmls v16.4s, v5.4s, v19.4s |
| |
| fmla v17.4s, v4.4s, v19.4s |
| fmla v17.4s, v5.4s, v18.4s |
| |
| zip1 v18.4s, v16.4s, v17.4s |
| zip2 v19.4s, v16.4s, v17.4s |
| |
| rev64 v31.4s, v14.4s |
| trn1 v28.2d, v1.2d, v1.2d |
| trn2 v29.2d, v1.2d, v1.2d |
| zip1 v30.2d, v14.2d, v31.2d |
| zip2 v31.2d, v14.2d, v31.2d |
| |
| st1 {v18.4s,v19.4s}, [x0], #32 // out[1-4] |
| |
| fmul v16.4s, v28.4s, v30.4s |
| fmul v17.4s, v29.4s, v30.4s |
| fmls v16.4s, v29.4s, v31.4s |
| fmla v17.4s, v28.4s, v31.4s |
| faddp v16.4s, v16.4s, v16.4s |
| faddp v17.4s, v17.4s, v17.4s |
| zip1 v18.2s, v16.2s, v17.2s |
| zip2 v19.2s, v16.2s, v17.2s |
| |
| fadd v18.2s, v18.2s, v0.2s |
| fadd v0.2s, v19.2s, v0.2s |
| |
| ext v30.16b, v12.16b, v12.16b, #4 |
| ext v31.16b, v13.16b, v13.16b, #4 |
| mov v16.16b, v6.16b |
| mov v17.16b, v7.16b |
| |
| uzp1 v30.4s, v30.4s, v8.4s |
| uzp1 v31.4s, v31.4s, v9.4s |
| |
| st1 {v18.2s}, [x0], #8 // out[5] |
| |
| fmla v16.4s, v2.4s, v10.4s |
| fmls v16.4s, v3.4s, v11.4s |
| |
| fmla v17.4s, v2.4s, v11.4s |
| fmla v17.4s, v3.4s, v10.4s |
| |
| fmla v16.4s, v4.4s, v30.4s |
| fmls v16.4s, v5.4s, v31.4s |
| |
| fmla v17.4s, v4.4s, v31.4s |
| fmla v17.4s, v5.4s, v30.4s |
| |
| zip1 v18.4s, v16.4s, v17.4s |
| zip2 v19.4s, v16.4s, v17.4s |
| |
| ext v30.16b, v10.16b, v10.16b, #4 |
| ext v31.16b, v11.16b, v11.16b, #4 |
| |
| fmla v6.4s, v2.4s, v12.4s |
| fmls v6.4s, v3.4s, v13.4s |
| |
| st1 {v18.4s,v19.4s}, [x0], #32 // out[6-9] |
| |
| uzp1 v30.4s, v30.4s, v12.4s |
| uzp1 v31.4s, v31.4s, v13.4s |
| |
| fmla v7.4s, v2.4s, v13.4s |
| fmla v7.4s, v3.4s, v12.4s |
| |
| st1 {v0.2s}, [x0], #8 // out[10] |
| |
| fmla v6.4s, v4.4s, v30.4s |
| fmls v6.4s, v5.4s, v31.4s |
| |
| fmla v7.4s, v4.4s, v31.4s |
| fmla v7.4s, v5.4s, v30.4s |
| |
| zip1 v18.4s, v6.4s, v7.4s |
| zip2 v19.4s, v6.4s, v7.4s |
| |
| st1 {v18.4s,v19.4s}, [x0], #32 // out[11-14] |
| |
| ret x9 |
| endfunc |
| |
| // x0: out, x1: out+len2, x2: exptab, x3: len2 |
| function fft15_pass |
| ands x6, x3, #3 |
| mov x4, x0 |
| mov x5, x1 |
| b.eq 9f |
| ld1 {v0.2s}, [x0], #8 |
| ld1 {v1.2s}, [x1], #8 |
| sub x3, x3, x6 |
| subs x6, x6, #1 |
| fadd v2.2s, v0.2s, v1.2s |
| fsub v3.2s, v0.2s, v1.2s |
| add x2, x2, #8 |
| st1 {v2.2s}, [x4], #8 |
| st1 {v3.2s}, [x5], #8 |
| b.eq 9f |
| 1: |
| subs x6, x6, #1 |
| ldp s4, s5, [x2], #8 |
| ldp s2, s3, [x1], #8 |
| ldp s0, s1, [x0], #8 |
| |
| fmul s6, s2, s4 |
| fmul s7, s2, s5 |
| fmls s6, s3, v5.s[0] |
| fmla s7, s3, v4.s[0] |
| |
| fsub s2, s0, s6 |
| fsub s3, s1, s7 |
| fadd s0, s0, s6 |
| fadd s1, s1, s7 |
| |
| stp s2, s3, [x5], #8 |
| stp s0, s1, [x4], #8 |
| b.gt 1b |
| 9: |
| ld1 {v4.4s,v5.4s}, [x2], #32 |
| ld2 {v2.4s,v3.4s}, [x1], #32 |
| uzp1 v6.4s, v4.4s, v5.4s |
| uzp2 v7.4s, v4.4s, v5.4s |
| ld2 {v0.4s,v1.4s}, [x0], #32 |
| 8: |
| subs x3, x3, #8 |
| |
| fmul v4.4s, v2.4s, v6.4s |
| fmul v5.4s, v2.4s, v7.4s |
| b.lt 4f |
| |
| ld1 {v18.4s,v19.4s}, [x2], #32 |
| |
| fmls v4.4s, v3.4s, v7.4s |
| fmla v5.4s, v3.4s, v6.4s |
| |
| ld2 {v22.4s,v23.4s}, [x1], #32 |
| |
| fsub v2.4s, v0.4s, v4.4s |
| fadd v0.4s, v0.4s, v4.4s |
| fsub v3.4s, v1.4s, v5.4s |
| fadd v1.4s, v1.4s, v5.4s |
| |
| uzp1 v16.4s, v18.4s, v19.4s |
| uzp2 v17.4s, v18.4s, v19.4s |
| |
| st2 {v2.4s,v3.4s}, [x5], #32 |
| st2 {v0.4s,v1.4s}, [x4], #32 |
| ld2 {v20.4s,v21.4s}, [x0], #32 |
| |
| fmul v18.4s, v22.4s, v16.4s |
| fmul v19.4s, v22.4s, v17.4s |
| b.eq 0f |
| |
| ld1 {v4.4s,v5.4s}, [x2], #32 |
| |
| fmls v18.4s, v23.4s, v17.4s |
| fmla v19.4s, v23.4s, v16.4s |
| |
| ld2 {v2.4s,v3.4s}, [x1], #32 |
| |
| fsub v22.4s, v20.4s, v18.4s |
| fadd v20.4s, v20.4s, v18.4s |
| fsub v23.4s, v21.4s, v19.4s |
| fadd v21.4s, v21.4s, v19.4s |
| |
| uzp1 v6.4s, v4.4s, v5.4s |
| uzp2 v7.4s, v4.4s, v5.4s |
| |
| st2 {v22.4s,v23.4s}, [x5], #32 |
| st2 {v20.4s,v21.4s}, [x4], #32 |
| ld2 {v0.4s,v1.4s}, [x0], #32 |
| |
| b 8b |
| 4: |
| fmls v4.4s, v3.4s, v7.4s |
| fmla v5.4s, v3.4s, v6.4s |
| |
| fsub v2.4s, v0.4s, v4.4s |
| fadd v0.4s, v0.4s, v4.4s |
| fsub v3.4s, v1.4s, v5.4s |
| fadd v1.4s, v1.4s, v5.4s |
| |
| st2 {v2.4s,v3.4s}, [x5], #32 |
| st2 {v0.4s,v1.4s}, [x4], #32 |
| |
| ret |
| 0: |
| fmls v18.4s, v23.4s, v17.4s |
| fmla v19.4s, v23.4s, v16.4s |
| |
| fsub v22.4s, v20.4s, v18.4s |
| fadd v20.4s, v20.4s, v18.4s |
| fsub v23.4s, v21.4s, v19.4s |
| fadd v21.4s, v21.4s, v19.4s |
| |
| st2 {v22.4s,v23.4s}, [x5], #32 |
| st2 {v20.4s,v21.4s}, [x4], #32 |
| |
| ret |
| endfunc |
| |
| function fft30_neon, align=6 |
| sub sp, sp, #0x20 |
| stp x20, x21, [sp] |
| stp x22, x30, [sp, #0x10] |
| mov x21, x1 |
| mov x22, x2 |
| mov x20, x4 |
| mov x0, x21 |
| mov x1, x22 |
| lsl x3, x20, #1 |
| bl fft15_neon |
| |
| add x0, x21, #15*8 |
| add x1, x22, x20, lsl #3 |
| lsl x3, x20, #1 |
| bl fft15_neon |
| |
| ldr x2, [x10, #(CELT_EXPTAB + 8)] // s->exptab[1] |
| add x0, x21, #0 |
| add x1, x21, #15*8 |
| mov x3, #15 |
| ldp x20, x21, [sp] |
| ldp x22, x30, [sp, #0x10] |
| add sp, sp, #0x20 |
| b fft15_pass |
| endfunc |
| |
| .macro def_fft n, n2 |
| function fft\n\()_neon, align=6 |
| sub sp, sp, #0x30 |
| stp x20, x21, [sp] |
| stp x22, x30, [sp, #0x10] |
| stp x23, x24, [sp, #0x20] |
| mov x21, x1 |
| mov x22, x2 |
| mov x23, x3 |
| mov x20, x4 |
| sub x3, x3, #1 |
| lsl x4, x4, #1 |
| bl fft\n2\()_neon |
| |
| add x1, x21, #(\n2 * 8) |
| add x2, x22, x20, lsl #3 |
| sub x3, x23, #1 |
| lsl x4, x20, #1 |
| bl fft\n2\()_neon |
| |
| add x5, x10, #CELT_EXPTAB |
| mov x0, x21 |
| ldr x2, [x5, x23, lsl #3] // s->exptab[N] |
| add x1, x21, #(\n2 * 8) |
| mov x3, #\n2 |
| ldp x20, x21, [sp] |
| ldp x22, x30, [sp, #0x10] |
| ldp x23, x24, [sp, #0x20] |
| add sp, sp, #0x30 |
| b fft15_pass |
| endfunc |
| .endm |
| |
| def_fft 60, 30 |
| 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 |
| .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 |
