/* * Copyright (c) 2011 Mans Rullgard * * 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/arm/asm.S" .macro bflies d0, d1, r0, r1 vrev64.32 \r0, \d1 @ t5, t6, t1, t2 vhsub.s16 \r1, \d1, \r0 @ t1-t5, t2-t6, t5-t1, t6-t2 vhadd.s16 \r0, \d1, \r0 @ t1+t5, t2+t6, t5+t1, t6+t2 vext.16 \r1, \r1, \r1, #1 @ t2-t6, t5-t1, t6-t2, t1-t5 vtrn.32 \r0, \r1 @ t1+t5, t2+t6, t2-t6, t5-t1 @ t5, t6, t4, t3 vhsub.s16 \d1, \d0, \r0 vhadd.s16 \d0, \d0, \r0 .endm .macro transform01 q0, q1, d3, c0, c1, r0, w0, w1 vrev32.16 \r0, \d3 vmull.s16 \w0, \d3, \c0 vmlal.s16 \w0, \r0, \c1 vshrn.s32 \d3, \w0, #15 bflies \q0, \q1, \w0, \w1 .endm .macro transform2 d0, d1, d2, d3, q0, q1, c0, c1, c2, c3, \ r0, r1, w0, w1 vrev32.16 \r0, \d1 vrev32.16 \r1, \d3 vmull.s16 \w0, \d1, \c0 vmlal.s16 \w0, \r0, \c1 vmull.s16 \w1, \d3, \c2 vmlal.s16 \w1, \r1, \c3 vshrn.s32 \d1, \w0, #15 vshrn.s32 \d3, \w1, #15 bflies \q0, \q1, \w0, \w1 .endm .macro fft4 d0, d1, r0, r1 vhsub.s16 \r0, \d0, \d1 @ t3, t4, t8, t7 vhsub.s16 \r1, \d1, \d0 vhadd.s16 \d0, \d0, \d1 @ t1, t2, t6, t5 vmov.i64 \d1, #0xffff00000000 vbit \r0, \r1, \d1 vrev64.16 \r1, \r0 @ t7, t8, t4, t3 vtrn.32 \r0, \r1 @ t3, t4, t7, t8 vtrn.32 \d0, \r0 @ t1, t2, t3, t4, t6, t5, t8, t7 vhsub.s16 \d1, \d0, \r0 @ r2, i2, r3, i1 vhadd.s16 \d0, \d0, \r0 @ r0, i0, r1, i3 .endm .macro fft8 d0, d1, d2, d3, q0, q1, c0, c1, r0, r1, w0, w1 fft4 \d0, \d1, \r0, \r1 vtrn.32 \d0, \d1 @ z0, z2, z1, z3 vhadd.s16 \r0, \d2, \d3 @ t1, t2, t3, t4 vhsub.s16 \d3, \d2, \d3 @ z5, z7 vmov \d2, \r0 transform01 \q0, \q1, \d3, \c0, \c1, \r0, \w0, \w1 .endm function fft4_neon vld1.16 {d0-d1}, [r0] fft4 d0, d1, d2, d3 vst1.16 {d0-d1}, [r0] bx lr endfunc function fft8_neon vld1.16 {d0-d3}, [r0,:128] movrel r1, coefs vld1.16 {d30}, [r1,:64] vdup.16 d31, d30[0] fft8 d0, d1, d2, d3, q0, q1, d31, d30, d20, d21, q8, q9 vtrn.32 d0, d1 vtrn.32 d2, d3 vst1.16 {d0-d3}, [r0,:128] bx lr endfunc function fft16_neon vld1.16 {d0-d3}, [r0,:128]! vld1.16 {d4-d7}, [r0,:128] movrel r1, coefs sub r0, r0, #32 vld1.16 {d28-d31},[r1,:128] vdup.16 d31, d28[0] fft8 d0, d1, d2, d3, q0, q1, d31, d28, d20, d21, q8, q9 vswp d5, d6 fft4 q2, q3, q8, q9 vswp d5, d6 vtrn.32 q0, q1 @ z0, z4, z2, z6, z1, z5, z3, z7 vtrn.32 q2, q3 @ z8, z12,z10,z14,z9, z13,z11,z15 vswp d1, d2 vdup.16 d31, d28[0] transform01 q0, q2, d5, d31, d28, d20, q8, q9 vdup.16 d26, d29[0] vdup.16 d27, d30[0] transform2 d2, d6, d3, d7, q1, q3, d26, d30, d27, d29, \ d20, d21, q8, q9 vtrn.32 q0, q1 vtrn.32 q2, q3 vst1.16 {d0-d3}, [r0,:128]! vst1.16 {d4-d7}, [r0,:128] bx lr endfunc function fft_pass_neon push {r4,lr} movrel lr, coefs + 24 vld1.16 {d30}, [lr,:64] lsl r12, r2, #3 vmov d31, d30 add r3, r1, r2, lsl #2 mov lr, #-8 sub r3, r3, #2 mov r4, r0 vld1.16 {d27[]}, [r3,:16] sub r3, r3, #6 vld1.16 {q0}, [r4,:128], r12 vld1.16 {q1}, [r4,:128], r12 vld1.16 {q2}, [r4,:128], r12 vld1.16 {q3}, [r4,:128], r12 vld1.16 {d28}, [r1,:64]! vld1.16 {d29}, [r3,:64], lr vswp d1, d2 vswp d5, d6 vtrn.32 d0, d1 vtrn.32 d4, d5 vdup.16 d25, d28[1] vmul.s16 d27, d27, d31 transform01 q0, q2, d5, d25, d27, d20, q8, q9 b 2f 1: mov r4, r0 vdup.16 d26, d29[0] vld1.16 {q0}, [r4,:128], r12 vld1.16 {q1}, [r4,:128], r12 vld1.16 {q2}, [r4,:128], r12 vld1.16 {q3}, [r4,:128], r12 vld1.16 {d28}, [r1,:64]! vld1.16 {d29}, [r3,:64], lr vswp d1, d2 vswp d5, d6 vtrn.32 d0, d1 vtrn.32 d4, d5 vdup.16 d24, d28[0] vdup.16 d25, d28[1] vdup.16 d27, d29[3] vmul.s16 q13, q13, q15 transform2 d0, d4, d1, d5, q0, q2, d24, d26, d25, d27, \ d16, d17, q9, q10 2: vtrn.32 d2, d3 vtrn.32 d6, d7 vdup.16 d24, d28[2] vdup.16 d26, d29[2] vdup.16 d25, d28[3] vdup.16 d27, d29[1] vmul.s16 q13, q13, q15 transform2 d2, d6, d3, d7, q1, q3, d24, d26, d25, d27, \ d16, d17, q9, q10 vtrn.32 d0, d1 vtrn.32 d2, d3 vtrn.32 d4, d5 vtrn.32 d6, d7 vswp d1, d2 vswp d5, d6 mov r4, r0 vst1.16 {q0}, [r4,:128], r12 vst1.16 {q1}, [r4,:128], r12 vst1.16 {q2}, [r4,:128], r12 vst1.16 {q3}, [r4,:128], r12 add r0, r0, #16 subs r2, r2, #2 bgt 1b pop {r4,pc} endfunc #define F_SQRT1_2 23170 #define F_COS_16_1 30274 #define F_COS_16_3 12540 const coefs, align=4 .short F_SQRT1_2, -F_SQRT1_2, -F_SQRT1_2, F_SQRT1_2 .short F_COS_16_1,-F_COS_16_1,-F_COS_16_1, F_COS_16_1 .short F_COS_16_3,-F_COS_16_3,-F_COS_16_3, F_COS_16_3 .short 1, -1, -1, 1 endconst .macro def_fft n, n2, n4 function fft\n\()_neon push {r4, lr} mov r4, r0 bl fft\n2\()_neon add r0, r4, #\n4*2*4 bl fft\n4\()_neon add r0, r4, #\n4*3*4 bl fft\n4\()_neon mov r0, r4 pop {r4, lr} movrelx r1, X(ff_cos_\n\()_fixed) mov r2, #\n4/2 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_fixed_calc_neon, export=1 ldr r2, [r0] sub r2, r2, #2 movrel r3, fft_fixed_tab_neon ldr r3, [r3, r2, lsl #2] mov r0, r1 bx r3 endfunc const fft_fixed_tab_neon, relocate=1 .word fft4_neon .word fft8_neon .word fft16_neon .word fft32_neon .word fft64_neon .word fft128_neon .word fft256_neon .word fft512_neon .word fft1024_neon .word fft2048_neon .word fft4096_neon .word fft8192_neon .word fft16384_neon .word fft32768_neon .word fft65536_neon endconst