| 1 | /* |
| 2 | * Copyright (c) 2011 Mans Rullgard <mans@mansr.com> |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include "libavutil/arm/asm.S" |
| 22 | |
| 23 | .macro bflies d0, d1, r0, r1 |
| 24 | vrev64.32 \r0, \d1 @ t5, t6, t1, t2 |
| 25 | vhsub.s16 \r1, \d1, \r0 @ t1-t5, t2-t6, t5-t1, t6-t2 |
| 26 | vhadd.s16 \r0, \d1, \r0 @ t1+t5, t2+t6, t5+t1, t6+t2 |
| 27 | vext.16 \r1, \r1, \r1, #1 @ t2-t6, t5-t1, t6-t2, t1-t5 |
| 28 | vtrn.32 \r0, \r1 @ t1+t5, t2+t6, t2-t6, t5-t1 |
| 29 | @ t5, t6, t4, t3 |
| 30 | vhsub.s16 \d1, \d0, \r0 |
| 31 | vhadd.s16 \d0, \d0, \r0 |
| 32 | .endm |
| 33 | |
| 34 | .macro transform01 q0, q1, d3, c0, c1, r0, w0, w1 |
| 35 | vrev32.16 \r0, \d3 |
| 36 | vmull.s16 \w0, \d3, \c0 |
| 37 | vmlal.s16 \w0, \r0, \c1 |
| 38 | vshrn.s32 \d3, \w0, #15 |
| 39 | bflies \q0, \q1, \w0, \w1 |
| 40 | .endm |
| 41 | |
| 42 | .macro transform2 d0, d1, d2, d3, q0, q1, c0, c1, c2, c3, \ |
| 43 | r0, r1, w0, w1 |
| 44 | vrev32.16 \r0, \d1 |
| 45 | vrev32.16 \r1, \d3 |
| 46 | vmull.s16 \w0, \d1, \c0 |
| 47 | vmlal.s16 \w0, \r0, \c1 |
| 48 | vmull.s16 \w1, \d3, \c2 |
| 49 | vmlal.s16 \w1, \r1, \c3 |
| 50 | vshrn.s32 \d1, \w0, #15 |
| 51 | vshrn.s32 \d3, \w1, #15 |
| 52 | bflies \q0, \q1, \w0, \w1 |
| 53 | .endm |
| 54 | |
| 55 | .macro fft4 d0, d1, r0, r1 |
| 56 | vhsub.s16 \r0, \d0, \d1 @ t3, t4, t8, t7 |
| 57 | vhsub.s16 \r1, \d1, \d0 |
| 58 | vhadd.s16 \d0, \d0, \d1 @ t1, t2, t6, t5 |
| 59 | vmov.i64 \d1, #0xffff00000000 |
| 60 | vbit \r0, \r1, \d1 |
| 61 | vrev64.16 \r1, \r0 @ t7, t8, t4, t3 |
| 62 | vtrn.32 \r0, \r1 @ t3, t4, t7, t8 |
| 63 | vtrn.32 \d0, \r0 @ t1, t2, t3, t4, t6, t5, t8, t7 |
| 64 | vhsub.s16 \d1, \d0, \r0 @ r2, i2, r3, i1 |
| 65 | vhadd.s16 \d0, \d0, \r0 @ r0, i0, r1, i3 |
| 66 | .endm |
| 67 | |
| 68 | .macro fft8 d0, d1, d2, d3, q0, q1, c0, c1, r0, r1, w0, w1 |
| 69 | fft4 \d0, \d1, \r0, \r1 |
| 70 | vtrn.32 \d0, \d1 @ z0, z2, z1, z3 |
| 71 | vhadd.s16 \r0, \d2, \d3 @ t1, t2, t3, t4 |
| 72 | vhsub.s16 \d3, \d2, \d3 @ z5, z7 |
| 73 | vmov \d2, \r0 |
| 74 | transform01 \q0, \q1, \d3, \c0, \c1, \r0, \w0, \w1 |
| 75 | .endm |
| 76 | |
| 77 | function fft4_neon |
| 78 | vld1.16 {d0-d1}, [r0] |
| 79 | fft4 d0, d1, d2, d3 |
| 80 | vst1.16 {d0-d1}, [r0] |
| 81 | bx lr |
| 82 | endfunc |
| 83 | |
| 84 | function fft8_neon |
| 85 | vld1.16 {d0-d3}, [r0,:128] |
| 86 | movrel r1, coefs |
| 87 | vld1.16 {d30}, [r1,:64] |
| 88 | vdup.16 d31, d30[0] |
| 89 | fft8 d0, d1, d2, d3, q0, q1, d31, d30, d20, d21, q8, q9 |
| 90 | vtrn.32 d0, d1 |
| 91 | vtrn.32 d2, d3 |
| 92 | vst1.16 {d0-d3}, [r0,:128] |
| 93 | bx lr |
| 94 | endfunc |
| 95 | |
| 96 | function fft16_neon |
| 97 | vld1.16 {d0-d3}, [r0,:128]! |
| 98 | vld1.16 {d4-d7}, [r0,:128] |
| 99 | movrel r1, coefs |
| 100 | sub r0, r0, #32 |
| 101 | vld1.16 {d28-d31},[r1,:128] |
| 102 | vdup.16 d31, d28[0] |
| 103 | fft8 d0, d1, d2, d3, q0, q1, d31, d28, d20, d21, q8, q9 |
| 104 | vswp d5, d6 |
| 105 | fft4 q2, q3, q8, q9 |
| 106 | vswp d5, d6 |
| 107 | vtrn.32 q0, q1 @ z0, z4, z2, z6, z1, z5, z3, z7 |
| 108 | vtrn.32 q2, q3 @ z8, z12,z10,z14,z9, z13,z11,z15 |
| 109 | vswp d1, d2 |
| 110 | vdup.16 d31, d28[0] |
| 111 | transform01 q0, q2, d5, d31, d28, d20, q8, q9 |
| 112 | vdup.16 d26, d29[0] |
| 113 | vdup.16 d27, d30[0] |
| 114 | transform2 d2, d6, d3, d7, q1, q3, d26, d30, d27, d29, \ |
| 115 | d20, d21, q8, q9 |
| 116 | vtrn.32 q0, q1 |
| 117 | vtrn.32 q2, q3 |
| 118 | vst1.16 {d0-d3}, [r0,:128]! |
| 119 | vst1.16 {d4-d7}, [r0,:128] |
| 120 | bx lr |
| 121 | endfunc |
| 122 | |
| 123 | function fft_pass_neon |
| 124 | push {r4,lr} |
| 125 | movrel lr, coefs + 24 |
| 126 | vld1.16 {d30}, [lr,:64] |
| 127 | lsl r12, r2, #3 |
| 128 | vmov d31, d30 |
| 129 | add r3, r1, r2, lsl #2 |
| 130 | mov lr, #-8 |
| 131 | sub r3, r3, #2 |
| 132 | mov r4, r0 |
| 133 | vld1.16 {d27[]}, [r3,:16] |
| 134 | sub r3, r3, #6 |
| 135 | vld1.16 {q0}, [r4,:128], r12 |
| 136 | vld1.16 {q1}, [r4,:128], r12 |
| 137 | vld1.16 {q2}, [r4,:128], r12 |
| 138 | vld1.16 {q3}, [r4,:128], r12 |
| 139 | vld1.16 {d28}, [r1,:64]! |
| 140 | vld1.16 {d29}, [r3,:64], lr |
| 141 | vswp d1, d2 |
| 142 | vswp d5, d6 |
| 143 | vtrn.32 d0, d1 |
| 144 | vtrn.32 d4, d5 |
| 145 | vdup.16 d25, d28[1] |
| 146 | vmul.s16 d27, d27, d31 |
| 147 | transform01 q0, q2, d5, d25, d27, d20, q8, q9 |
| 148 | b 2f |
| 149 | 1: |
| 150 | mov r4, r0 |
| 151 | vdup.16 d26, d29[0] |
| 152 | vld1.16 {q0}, [r4,:128], r12 |
| 153 | vld1.16 {q1}, [r4,:128], r12 |
| 154 | vld1.16 {q2}, [r4,:128], r12 |
| 155 | vld1.16 {q3}, [r4,:128], r12 |
| 156 | vld1.16 {d28}, [r1,:64]! |
| 157 | vld1.16 {d29}, [r3,:64], lr |
| 158 | vswp d1, d2 |
| 159 | vswp d5, d6 |
| 160 | vtrn.32 d0, d1 |
| 161 | vtrn.32 d4, d5 |
| 162 | vdup.16 d24, d28[0] |
| 163 | vdup.16 d25, d28[1] |
| 164 | vdup.16 d27, d29[3] |
| 165 | vmul.s16 q13, q13, q15 |
| 166 | transform2 d0, d4, d1, d5, q0, q2, d24, d26, d25, d27, \ |
| 167 | d16, d17, q9, q10 |
| 168 | 2: |
| 169 | vtrn.32 d2, d3 |
| 170 | vtrn.32 d6, d7 |
| 171 | vdup.16 d24, d28[2] |
| 172 | vdup.16 d26, d29[2] |
| 173 | vdup.16 d25, d28[3] |
| 174 | vdup.16 d27, d29[1] |
| 175 | vmul.s16 q13, q13, q15 |
| 176 | transform2 d2, d6, d3, d7, q1, q3, d24, d26, d25, d27, \ |
| 177 | d16, d17, q9, q10 |
| 178 | vtrn.32 d0, d1 |
| 179 | vtrn.32 d2, d3 |
| 180 | vtrn.32 d4, d5 |
| 181 | vtrn.32 d6, d7 |
| 182 | vswp d1, d2 |
| 183 | vswp d5, d6 |
| 184 | mov r4, r0 |
| 185 | vst1.16 {q0}, [r4,:128], r12 |
| 186 | vst1.16 {q1}, [r4,:128], r12 |
| 187 | vst1.16 {q2}, [r4,:128], r12 |
| 188 | vst1.16 {q3}, [r4,:128], r12 |
| 189 | add r0, r0, #16 |
| 190 | subs r2, r2, #2 |
| 191 | bgt 1b |
| 192 | pop {r4,pc} |
| 193 | endfunc |
| 194 | |
| 195 | #define F_SQRT1_2 23170 |
| 196 | #define F_COS_16_1 30274 |
| 197 | #define F_COS_16_3 12540 |
| 198 | |
| 199 | const coefs, align=4 |
| 200 | .short F_SQRT1_2, -F_SQRT1_2, -F_SQRT1_2, F_SQRT1_2 |
| 201 | .short F_COS_16_1,-F_COS_16_1,-F_COS_16_1, F_COS_16_1 |
| 202 | .short F_COS_16_3,-F_COS_16_3,-F_COS_16_3, F_COS_16_3 |
| 203 | .short 1, -1, -1, 1 |
| 204 | endconst |
| 205 | |
| 206 | .macro def_fft n, n2, n4 |
| 207 | function fft\n\()_neon |
| 208 | push {r4, lr} |
| 209 | mov r4, r0 |
| 210 | bl fft\n2\()_neon |
| 211 | add r0, r4, #\n4*2*4 |
| 212 | bl fft\n4\()_neon |
| 213 | add r0, r4, #\n4*3*4 |
| 214 | bl fft\n4\()_neon |
| 215 | mov r0, r4 |
| 216 | pop {r4, lr} |
| 217 | movrelx r1, X(ff_cos_\n\()_fixed) |
| 218 | mov r2, #\n4/2 |
| 219 | b fft_pass_neon |
| 220 | endfunc |
| 221 | .endm |
| 222 | |
| 223 | def_fft 32, 16, 8 |
| 224 | def_fft 64, 32, 16 |
| 225 | def_fft 128, 64, 32 |
| 226 | def_fft 256, 128, 64 |
| 227 | def_fft 512, 256, 128 |
| 228 | def_fft 1024, 512, 256 |
| 229 | def_fft 2048, 1024, 512 |
| 230 | def_fft 4096, 2048, 1024 |
| 231 | def_fft 8192, 4096, 2048 |
| 232 | def_fft 16384, 8192, 4096 |
| 233 | def_fft 32768, 16384, 8192 |
| 234 | def_fft 65536, 32768, 16384 |
| 235 | |
| 236 | function ff_fft_fixed_calc_neon, export=1 |
| 237 | ldr r2, [r0] |
| 238 | sub r2, r2, #2 |
| 239 | movrel r3, fft_fixed_tab_neon |
| 240 | ldr r3, [r3, r2, lsl #2] |
| 241 | mov r0, r1 |
| 242 | bx r3 |
| 243 | endfunc |
| 244 | |
| 245 | const fft_fixed_tab_neon |
| 246 | .word fft4_neon |
| 247 | .word fft8_neon |
| 248 | .word fft16_neon |
| 249 | .word fft32_neon |
| 250 | .word fft64_neon |
| 251 | .word fft128_neon |
| 252 | .word fft256_neon |
| 253 | .word fft512_neon |
| 254 | .word fft1024_neon |
| 255 | .word fft2048_neon |
| 256 | .word fft4096_neon |
| 257 | .word fft8192_neon |
| 258 | .word fft16384_neon |
| 259 | .word fft32768_neon |
| 260 | .word fft65536_neon |
| 261 | endconst |