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FFmpeg/libavutil/x86/tx_float.asm

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;******************************************************************************
;* Copyright (c) Lynne
;*
;* 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
;******************************************************************************
; Open `doc/transforms.md` to see the code upon which the transforms here were
; based upon and compare.
; TODO:
; carry over registers from smaller transforms to save on ~8 loads/stores
; check if vinsertf could be faster than verpm2f128 for duplication
; even faster FFT8 (current one is very #instructions optimized)
; replace some xors with blends + addsubs?
; replace some shuffles with vblends?
; avx512 split-radix
%include "libavutil/x86/x86util.asm"
%define private_prefix ff_tx
%if ARCH_X86_64
%define ptr resq
%else
%define ptr resd
%endif
%assign i 16
%rep 14
cextern tab_ %+ i %+ _float ; ff_tab_i_float...
%assign i (i << 1)
%endrep
struc AVTXContext
.len: resd 1 ; Length
.inv resd 1 ; Inverse flag
.map: ptr 1 ; Lookup table(s)
.exp: ptr 1 ; Exponentiation factors
.tmp: ptr 1 ; Temporary data
.sub: ptr 1 ; Subcontexts
.fn: ptr 4 ; Subcontext functions
.nb_sub: resd 1 ; Subcontext count
; Everything else is inaccessible
endstruc
SECTION_RODATA 32
%define POS 0x00000000
%define NEG 0x80000000
%define M_SQRT1_2 0.707106781186547524401
%define COS16_1 0.92387950420379638671875
%define COS16_3 0.3826834261417388916015625
d8_mult_odd: dd M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2, \
M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2
s8_mult_odd: dd 1.0, 1.0, -1.0, 1.0, -M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2, M_SQRT1_2
s8_perm_even: dd 1, 3, 0, 2, 1, 3, 2, 0
s8_perm_odd1: dd 3, 3, 1, 1, 1, 1, 3, 3
s8_perm_odd2: dd 1, 2, 0, 3, 1, 0, 0, 1
s16_mult_even: dd 1.0, 1.0, M_SQRT1_2, M_SQRT1_2, 1.0, -1.0, M_SQRT1_2, -M_SQRT1_2
s16_mult_odd1: dd COS16_1, COS16_1, COS16_3, COS16_3, COS16_1, -COS16_1, COS16_3, -COS16_3
s16_mult_odd2: dd COS16_3, -COS16_3, COS16_1, -COS16_1, -COS16_3, -COS16_3, -COS16_1, -COS16_1
s16_perm: dd 0, 1, 2, 3, 1, 0, 3, 2
mask_mmmmpppm: dd NEG, NEG, NEG, NEG, POS, POS, POS, NEG
mask_ppmpmmpm: dd POS, POS, NEG, POS, NEG, NEG, POS, NEG
mask_mppmmpmp: dd NEG, POS, POS, NEG, NEG, POS, NEG, POS
mask_mpmppmpm: dd NEG, POS, NEG, POS, POS, NEG, POS, NEG
mask_pmmppmmp: dd POS, NEG, NEG, POS, POS, NEG, NEG, POS
mask_pmpmpmpm: times 4 dd POS, NEG
SECTION .text
; Load complex values (64 bits) via a lookup table
; %1 - output register
; %2 - GRP of base input memory address
; %3 - GPR of LUT (int32_t indices) address
; %4 - LUT offset
; %5 - temporary GPR (only used if vgather is not used)
; %6 - temporary register (for avx only)
; %7 - temporary register (for avx only, enables vgatherdpd (AVX2) if FMA3 is set)
%macro LOAD64_LUT 5-7
%if %0 > 6 && cpuflag(avx2)
pcmpeqd %6, %6 ; pcmpeqq has a 0.5 throughput on Zen 3, this has 0.25
movapd xmm%7, [%3 + %4] ; float mov since vgatherdpd is a float instruction
vgatherdpd %1, [%2 + xmm%7*8], %6 ; must use separate registers for args
%else
mov %5d, [%3 + %4 + 0]
movsd xmm%1, [%2 + %5q*8]
%if mmsize == 32
mov %5d, [%3 + %4 + 8]
movsd xmm%6, [%2 + %5q*8]
%endif
mov %5d, [%3 + %4 + 4]
movhps xmm%1, [%2 + %5q*8]
%if mmsize == 32
mov %5d, [%3 + %4 + 12]
movhps xmm%6, [%2 + %5q*8]
vinsertf128 %1, %1, xmm%6, 1
%endif
%endif
%endmacro
; Single 2-point in-place complex FFT (will do 2 transforms at once in AVX mode)
; %1 - coefficients (r0.reim, r1.reim)
; %2 - temporary
%macro FFT2 2
shufps %2, %1, %1, q3322
shufps %1, %1, %1, q1100
addsubps %1, %1, %2
shufps %1, %1, %1, q2031
%endmacro
; Single 4-point in-place complex FFT (will do 2 transforms at once in [AVX] mode)
; %1 - even coefficients (r0.reim, r2.reim, r4.reim, r6.reim)
; %2 - odd coefficients (r1.reim, r3.reim, r5.reim, r7.reim)
; %3 - temporary
%macro FFT4 3
subps %3, %1, %2 ; r1234, [r5678]
addps %1, %1, %2 ; t1234, [t5678]
shufps %2, %1, %3, q1010 ; t12, r12
shufps %1, %1, %3, q2332 ; t34, r43
subps %3, %2, %1 ; a34, b32
addps %2, %2, %1 ; a12, b14
shufps %1, %2, %3, q1010 ; a1234 even
shufps %2, %2, %3, q2332 ; b1423
shufps %2, %2, %2, q1320 ; b1234 odd
%endmacro
; Single/Dual 8-point in-place complex FFT (will do 2 transforms in [AVX] mode)
; %1 - even coefficients (a0.reim, a2.reim, [b0.reim, b2.reim])
; %2 - even coefficients (a4.reim, a6.reim, [b4.reim, b6.reim])
; %3 - odd coefficients (a1.reim, a3.reim, [b1.reim, b3.reim])
; %4 - odd coefficients (a5.reim, a7.reim, [b5.reim, b7.reim])
; %5 - temporary
; %6 - temporary
%macro FFT8 6
addps %5, %1, %3 ; q1-8
addps %6, %2, %4 ; k1-8
subps %1, %1, %3 ; r1-8
subps %2, %2, %4 ; j1-8
shufps %4, %1, %1, q2323 ; r4343
shufps %3, %5, %6, q3032 ; q34, k14
shufps %1, %1, %1, q1010 ; r1212
shufps %5, %5, %6, q1210 ; q12, k32
xorps %4, %4, [mask_pmmppmmp] ; r4343 * pmmp
addps %6, %5, %3 ; s12, g12
mulps %2, %2, [d8_mult_odd] ; r8 * d8_mult_odd
subps %5, %5, %3 ; s34, g43
addps %3, %1, %4 ; z1234
unpcklpd %1, %6, %5 ; s1234
shufps %4, %2, %2, q2301 ; j2143
shufps %6, %6, %5, q2332 ; g1234
addsubps %2, %2, %4 ; l2143
shufps %5, %2, %2, q0123 ; l3412
addsubps %5, %5, %2 ; t1234
subps %2, %1, %6 ; h1234 even
subps %4, %3, %5 ; u1234 odd
addps %1, %1, %6 ; w1234 even
addps %3, %3, %5 ; o1234 odd
%endmacro
; Single 8-point in-place complex FFT in 20 instructions
; %1 - even coefficients (r0.reim, r2.reim, r4.reim, r6.reim)
; %2 - odd coefficients (r1.reim, r3.reim, r5.reim, r7.reim)
; %3 - temporary
; %4 - temporary
%macro FFT8_AVX 4
subps %3, %1, %2 ; r1234, r5678
addps %1, %1, %2 ; q1234, q5678
vpermilps %2, %3, [s8_perm_odd1] ; r4422, r6688
shufps %4, %1, %1, q3322 ; q1122, q5566
movsldup %3, %3 ; r1133, r5577
shufps %1, %1, %1, q1100 ; q3344, q7788
addsubps %3, %3, %2 ; z1234, z5678
addsubps %1, %1, %4 ; s3142, s7586
mulps %3, %3, [s8_mult_odd] ; z * s8_mult_odd
vpermilps %1, %1, [s8_perm_even] ; s1234, s5687 !
shufps %2, %3, %3, q2332 ; junk, z7887
xorps %4, %1, [mask_mmmmpppm] ; e1234, e5687 !
vpermilps %3, %3, [s8_perm_odd2] ; z2314, z6556
vperm2f128 %1, %1, %4, 0x03 ; e5687, s1234
addsubps %2, %2, %3 ; junk, t5678
subps %1, %1, %4 ; w1234, w5678 even
vperm2f128 %2, %2, %2, 0x11 ; t5678, t5678
vperm2f128 %3, %3, %3, 0x00 ; z2314, z2314
xorps %2, %2, [mask_ppmpmmpm] ; t * ppmpmmpm
addps %2, %3, %2 ; u1234, u5678 odd
%endmacro
; Single 16-point in-place complex FFT
; %1 - even coefficients (r0.reim, r2.reim, r4.reim, r6.reim)
; %2 - even coefficients (r8.reim, r10.reim, r12.reim, r14.reim)
; %3 - odd coefficients (r1.reim, r3.reim, r5.reim, r7.reim)
; %4 - odd coefficients (r9.reim, r11.reim, r13.reim, r15.reim)
; %5, %6 - temporary
; %7, %8 - temporary (optional)
%macro FFT16 6-8
FFT4 %3, %4, %5
%if %0 > 7
FFT8_AVX %1, %2, %6, %7
movaps %8, [mask_mpmppmpm]
movaps %7, [s16_perm]
%define mask %8
%define perm %7
%elif %0 > 6
FFT8_AVX %1, %2, %6, %7
movaps %7, [s16_perm]
%define mask [mask_mpmppmpm]
%define perm %7
%else
FFT8_AVX %1, %2, %6, %5
%define mask [mask_mpmppmpm]
%define perm [s16_perm]
%endif
xorps %5, %5, %5 ; 0
shufps %6, %4, %4, q2301 ; z12.imre, z13.imre...
shufps %5, %5, %3, q2301 ; 0, 0, z8.imre...
mulps %4, %4, [s16_mult_odd1] ; z.reim * costab
xorps %5, %5, [mask_mppmmpmp]
%if cpuflag(fma3)
fmaddps %6, %6, [s16_mult_odd2], %4 ; s[8..15]
addps %5, %3, %5 ; s[0...7]
%else
mulps %6, %6, [s16_mult_odd2] ; z.imre * costab
addps %5, %3, %5 ; s[0...7]
addps %6, %4, %6 ; s[8..15]
%endif
mulps %5, %5, [s16_mult_even] ; s[0...7]*costab
xorps %4, %6, mask ; s[8..15]*mpmppmpm
xorps %3, %5, mask ; s[0...7]*mpmppmpm
vperm2f128 %4, %4, %4, 0x01 ; s[12..15, 8..11]
vperm2f128 %3, %3, %3, 0x01 ; s[4..7, 0..3]
addps %6, %6, %4 ; y56, u56, y34, u34
addps %5, %5, %3 ; w56, x56, w34, x34
vpermilps %6, %6, perm ; y56, u56, y43, u43
vpermilps %5, %5, perm ; w56, x56, w43, x43
subps %4, %2, %6 ; odd part 2
addps %3, %2, %6 ; odd part 1
subps %2, %1, %5 ; even part 2
addps %1, %1, %5 ; even part 1
%undef mask
%undef perm
%endmacro
; Cobmines m0...m8 (tx1[even, even, odd, odd], tx2,3[even], tx2,3[odd]) coeffs
; Uses all 16 of registers.
; Output is slightly permuted such that tx2,3's coefficients are interleaved
; on a 2-point basis (look at `doc/transforms.md`)
%macro SPLIT_RADIX_COMBINE 17
%if %1 && mmsize == 32
vperm2f128 %14, %6, %7, 0x20 ; m2[0], m2[1], m3[0], m3[1] even
vperm2f128 %16, %9, %8, 0x20 ; m2[0], m2[1], m3[0], m3[1] odd
vperm2f128 %15, %6, %7, 0x31 ; m2[2], m2[3], m3[2], m3[3] even
vperm2f128 %17, %9, %8, 0x31 ; m2[2], m2[3], m3[2], m3[3] odd
%endif
shufps %12, %10, %10, q2200 ; cos00224466
shufps %13, %11, %11, q1133 ; wim77553311
movshdup %10, %10 ; cos11335577
shufps %11, %11, %11, q0022 ; wim66442200
%if %1 && mmsize == 32
shufps %6, %14, %14, q2301 ; m2[0].imre, m2[1].imre, m2[2].imre, m2[3].imre even
shufps %8, %16, %16, q2301 ; m2[0].imre, m2[1].imre, m2[2].imre, m2[3].imre odd
shufps %7, %15, %15, q2301 ; m3[0].imre, m3[1].imre, m3[2].imre, m3[3].imre even
shufps %9, %17, %17, q2301 ; m3[0].imre, m3[1].imre, m3[2].imre, m3[3].imre odd
mulps %14, %14, %13 ; m2[0123]reim * wim7531 even
mulps %16, %16, %11 ; m2[0123]reim * wim7531 odd
mulps %15, %15, %13 ; m3[0123]reim * wim7531 even
mulps %17, %17, %11 ; m3[0123]reim * wim7531 odd
%else
mulps %14, %6, %13 ; m2,3[01]reim * wim7531 even
mulps %16, %8, %11 ; m2,3[01]reim * wim7531 odd
mulps %15, %7, %13 ; m2,3[23]reim * wim7531 even
mulps %17, %9, %11 ; m2,3[23]reim * wim7531 odd
; reorder the multiplies to save movs reg, reg in the %if above
shufps %6, %6, %6, q2301 ; m2[0].imre, m2[1].imre, m3[0].imre, m3[1].imre even
shufps %8, %8, %8, q2301 ; m2[0].imre, m2[1].imre, m3[0].imre, m3[1].imre odd
shufps %7, %7, %7, q2301 ; m2[2].imre, m2[3].imre, m3[2].imre, m3[3].imre even
shufps %9, %9, %9, q2301 ; m2[2].imre, m2[3].imre, m3[2].imre, m3[3].imre odd
%endif
%if cpuflag(fma3) ; 11 - 5 = 6 instructions saved through FMA!
fmaddsubps %6, %6, %12, %14 ; w[0..8] even
fmaddsubps %8, %8, %10, %16 ; w[0..8] odd
fmsubaddps %7, %7, %12, %15 ; j[0..8] even
fmsubaddps %9, %9, %10, %17 ; j[0..8] odd
movaps %13, [mask_pmpmpmpm] ; "subaddps? pfft, who needs that!"
%else
mulps %6, %6, %12 ; m2,3[01]imre * cos0246
mulps %8, %8, %10 ; m2,3[01]imre * cos0246
movaps %13, [mask_pmpmpmpm] ; "subaddps? pfft, who needs that!"
mulps %7, %7, %12 ; m2,3[23]reim * cos0246
mulps %9, %9, %10 ; m2,3[23]reim * cos0246
addsubps %6, %6, %14 ; w[0..8]
addsubps %8, %8, %16 ; w[0..8]
xorps %15, %15, %13 ; +-m2,3[23]imre * wim7531
xorps %17, %17, %13 ; +-m2,3[23]imre * wim7531
addps %7, %7, %15 ; j[0..8]
addps %9, %9, %17 ; j[0..8]
%endif
addps %14, %6, %7 ; t10235476 even
addps %16, %8, %9 ; t10235476 odd
subps %15, %6, %7 ; +-r[0..7] even
subps %17, %8, %9 ; +-r[0..7] odd
shufps %14, %14, %14, q2301 ; t[0..7] even
shufps %16, %16, %16, q2301 ; t[0..7] odd
xorps %15, %15, %13 ; r[0..7] even
xorps %17, %17, %13 ; r[0..7] odd
subps %6, %2, %14 ; m2,3[01] even
subps %8, %4, %16 ; m2,3[01] odd
subps %7, %3, %15 ; m2,3[23] even
subps %9, %5, %17 ; m2,3[23] odd
addps %2, %2, %14 ; m0 even
addps %4, %4, %16 ; m0 odd
addps %3, %3, %15 ; m1 even
addps %5, %5, %17 ; m1 odd
%endmacro
; Same as above, only does one parity at a time, takes 3 temporary registers,
; however, if the twiddles aren't needed after this, the registers they use
; can be used as any of the temporary registers.
%macro SPLIT_RADIX_COMBINE_HALF 10
%if %1
shufps %8, %6, %6, q2200 ; cos00224466
shufps %9, %7, %7, q1133 ; wim77553311
%else
shufps %8, %6, %6, q3311 ; cos11335577
shufps %9, %7, %7, q0022 ; wim66442200
%endif
mulps %10, %4, %9 ; m2,3[01]reim * wim7531 even
mulps %9, %9, %5 ; m2,3[23]reim * wim7531 even
shufps %4, %4, %4, q2301 ; m2[0].imre, m2[1].imre, m3[0].imre, m3[1].imre even
shufps %5, %5, %5, q2301 ; m2[2].imre, m2[3].imre, m3[2].imre, m3[3].imre even
%if cpuflag(fma3)
fmaddsubps %4, %4, %8, %10 ; w[0..8] even
fmsubaddps %5, %5, %8, %9 ; j[0..8] even
movaps %10, [mask_pmpmpmpm]
%else
mulps %4, %4, %8 ; m2,3[01]imre * cos0246
mulps %5, %5, %8 ; m2,3[23]reim * cos0246
addsubps %4, %4, %10 ; w[0..8]
movaps %10, [mask_pmpmpmpm]
xorps %9, %9, %10 ; +-m2,3[23]imre * wim7531
addps %5, %5, %9 ; j[0..8]
%endif
addps %8, %4, %5 ; t10235476
subps %9, %4, %5 ; +-r[0..7]
shufps %8, %8, %8, q2301 ; t[0..7]
xorps %9, %9, %10 ; r[0..7]
subps %4, %2, %8 ; %3,3[01]
subps %5, %3, %9 ; %3,3[23]
addps %2, %2, %8 ; m0
addps %3, %3, %9 ; m1
%endmacro
; Same as above, tries REALLY hard to use 2 temporary registers.
%macro SPLIT_RADIX_COMBINE_LITE 9
%if %1
shufps %8, %6, %6, q2200 ; cos00224466
shufps %9, %7, %7, q1133 ; wim77553311
%else
shufps %8, %6, %6, q3311 ; cos11335577
shufps %9, %7, %7, q0022 ; wim66442200
%endif
mulps %9, %9, %4 ; m2,3[01]reim * wim7531 even
shufps %4, %4, %4, q2301 ; m2[0].imre, m2[1].imre, m3[0].imre, m3[1].imre even
%if cpuflag(fma3)
fmaddsubps %4, %4, %8, %9 ; w[0..8] even
%else
mulps %4, %4, %8 ; m2,3[01]imre * cos0246
addsubps %4, %4, %9 ; w[0..8]
%endif
%if %1
shufps %9, %7, %7, q1133 ; wim77553311
%else
shufps %9, %7, %7, q0022 ; wim66442200
%endif
mulps %9, %9, %5 ; m2,3[23]reim * wim7531 even
shufps %5, %5, %5, q2301 ; m2[2].imre, m2[3].imre, m3[2].imre, m3[3].imre even
%if cpuflag (fma3)
fmsubaddps %5, %5, %8, %9 ; j[0..8] even
%else
mulps %5, %5, %8 ; m2,3[23]reim * cos0246
xorps %9, %9, [mask_pmpmpmpm] ; +-m2,3[23]imre * wim7531
addps %5, %5, %9 ; j[0..8]
%endif
addps %8, %4, %5 ; t10235476
subps %9, %4, %5 ; +-r[0..7]
shufps %8, %8, %8, q2301 ; t[0..7]
xorps %9, %9, [mask_pmpmpmpm] ; r[0..7]
subps %4, %2, %8 ; %3,3[01]
subps %5, %3, %9 ; %3,3[23]
addps %2, %2, %8 ; m0
addps %3, %3, %9 ; m1
%endmacro
%macro SPLIT_RADIX_COMBINE_64 0
SPLIT_RADIX_COMBINE_LITE 1, m0, m1, tx1_e0, tx2_e0, tw_e, tw_o, tmp1, tmp2
movaps [outq + 0*mmsize], m0
movaps [outq + 4*mmsize], m1
movaps [outq + 8*mmsize], tx1_e0
movaps [outq + 12*mmsize], tx2_e0
SPLIT_RADIX_COMBINE_HALF 0, m2, m3, tx1_o0, tx2_o0, tw_e, tw_o, tmp1, tmp2, m0
movaps [outq + 2*mmsize], m2
movaps [outq + 6*mmsize], m3
movaps [outq + 10*mmsize], tx1_o0
movaps [outq + 14*mmsize], tx2_o0
movaps tw_e, [tab_64_float + mmsize]
vperm2f128 tw_o, tw_o, [tab_64_float + 64 - 4*7 - mmsize], 0x23
movaps m0, [outq + 1*mmsize]
movaps m1, [outq + 3*mmsize]
movaps m2, [outq + 5*mmsize]
movaps m3, [outq + 7*mmsize]
SPLIT_RADIX_COMBINE 0, m0, m2, m1, m3, tx1_e1, tx2_e1, tx1_o1, tx2_o1, tw_e, tw_o, \
tmp1, tmp2, tx2_o0, tx1_o0, tx2_e0, tx1_e0 ; temporary registers
movaps [outq + 1*mmsize], m0
movaps [outq + 3*mmsize], m1
movaps [outq + 5*mmsize], m2
movaps [outq + 7*mmsize], m3
movaps [outq + 9*mmsize], tx1_e1
movaps [outq + 11*mmsize], tx1_o1
movaps [outq + 13*mmsize], tx2_e1
movaps [outq + 15*mmsize], tx2_o1
%endmacro
; Perform a single even/odd split radix combination with loads and stores
; The _4 indicates this is a quarter of the iterations required to complete a full
; combine loop
; %1 must contain len*2, %2 must contain len*4, %3 must contain len*6
%macro SPLIT_RADIX_LOAD_COMBINE_4 8
movaps m8, [rtabq + (%5)*mmsize + %7]
vperm2f128 m9, m9, [itabq - (%5)*mmsize + %8], 0x23
movaps m0, [outq + (0 + %4)*mmsize + %6]
movaps m2, [outq + (2 + %4)*mmsize + %6]
movaps m1, [outq + %1 + (0 + %4)*mmsize + %6]
movaps m3, [outq + %1 + (2 + %4)*mmsize + %6]
movaps m4, [outq + %2 + (0 + %4)*mmsize + %6]
movaps m6, [outq + %2 + (2 + %4)*mmsize + %6]
movaps m5, [outq + %3 + (0 + %4)*mmsize + %6]
movaps m7, [outq + %3 + (2 + %4)*mmsize + %6]
SPLIT_RADIX_COMBINE 0, m0, m1, m2, m3, \
m4, m5, m6, m7, \
m8, m9, \
m10, m11, m12, m13, m14, m15
movaps [outq + (0 + %4)*mmsize + %6], m0
movaps [outq + (2 + %4)*mmsize + %6], m2
movaps [outq + %1 + (0 + %4)*mmsize + %6], m1
movaps [outq + %1 + (2 + %4)*mmsize + %6], m3
movaps [outq + %2 + (0 + %4)*mmsize + %6], m4
movaps [outq + %2 + (2 + %4)*mmsize + %6], m6
movaps [outq + %3 + (0 + %4)*mmsize + %6], m5
movaps [outq + %3 + (2 + %4)*mmsize + %6], m7
%endmacro
%macro SPLIT_RADIX_LOAD_COMBINE_FULL 2-5
%if %0 > 2
%define offset_c %3
%else
%define offset_c 0
%endif
%if %0 > 3
%define offset_r %4
%else
%define offset_r 0
%endif
%if %0 > 4
%define offset_i %5
%else
%define offset_i 0
%endif
SPLIT_RADIX_LOAD_COMBINE_4 %1, 2*%1, %2, 0, 0, offset_c, offset_r, offset_i
SPLIT_RADIX_LOAD_COMBINE_4 %1, 2*%1, %2, 1, 1, offset_c, offset_r, offset_i
SPLIT_RADIX_LOAD_COMBINE_4 %1, 2*%1, %2, 4, 2, offset_c, offset_r, offset_i
SPLIT_RADIX_LOAD_COMBINE_4 %1, 2*%1, %2, 5, 3, offset_c, offset_r, offset_i
%endmacro
; Perform a single even/odd split radix combination with loads, deinterleaves and
; stores. The _2 indicates this is a half of the iterations required to complete
; a full combine+deinterleave loop
; %3 must contain len*2, %4 must contain len*4, %5 must contain len*6
%macro SPLIT_RADIX_COMBINE_DEINTERLEAVE_2 6
movaps m8, [rtabq + (0 + %2)*mmsize]
vperm2f128 m9, m9, [itabq - (0 + %2)*mmsize], 0x23
movaps m0, [outq + (0 + 0 + %1)*mmsize + %6]
movaps m2, [outq + (2 + 0 + %1)*mmsize + %6]
movaps m1, [outq + %3 + (0 + 0 + %1)*mmsize + %6]
movaps m3, [outq + %3 + (2 + 0 + %1)*mmsize + %6]
movaps m4, [outq + %4 + (0 + 0 + %1)*mmsize + %6]
movaps m6, [outq + %4 + (2 + 0 + %1)*mmsize + %6]
movaps m5, [outq + %5 + (0 + 0 + %1)*mmsize + %6]
movaps m7, [outq + %5 + (2 + 0 + %1)*mmsize + %6]
SPLIT_RADIX_COMBINE 0, m0, m1, m2, m3, \
m4, m5, m6, m7, \
m8, m9, \
m10, m11, m12, m13, m14, m15
unpckhpd m10, m0, m2
unpckhpd m11, m1, m3
unpckhpd m12, m4, m6
unpckhpd m13, m5, m7
unpcklpd m0, m0, m2
unpcklpd m1, m1, m3
unpcklpd m4, m4, m6
unpcklpd m5, m5, m7
vextractf128 [outq + (0 + 0 + %1)*mmsize + %6 + 0], m0, 0
vextractf128 [outq + (0 + 0 + %1)*mmsize + %6 + 16], m10, 0
vextractf128 [outq + %3 + (0 + 0 + %1)*mmsize + %6 + 0], m1, 0
vextractf128 [outq + %3 + (0 + 0 + %1)*mmsize + %6 + 16], m11, 0
vextractf128 [outq + %4 + (0 + 0 + %1)*mmsize + %6 + 0], m4, 0
vextractf128 [outq + %4 + (0 + 0 + %1)*mmsize + %6 + 16], m12, 0
vextractf128 [outq + %5 + (0 + 0 + %1)*mmsize + %6 + 0], m5, 0
vextractf128 [outq + %5 + (0 + 0 + %1)*mmsize + %6 + 16], m13, 0
vperm2f128 m10, m10, m0, 0x13
vperm2f128 m11, m11, m1, 0x13
vperm2f128 m12, m12, m4, 0x13
vperm2f128 m13, m13, m5, 0x13
movaps m8, [rtabq + (1 + %2)*mmsize]
vperm2f128 m9, m9, [itabq - (1 + %2)*mmsize], 0x23
movaps m0, [outq + (0 + 1 + %1)*mmsize + %6]
movaps m2, [outq + (2 + 1 + %1)*mmsize + %6]
movaps m1, [outq + %3 + (0 + 1 + %1)*mmsize + %6]
movaps m3, [outq + %3 + (2 + 1 + %1)*mmsize + %6]
movaps [outq + (0 + 1 + %1)*mmsize + %6], m10 ; m0 conflict
movaps [outq + %3 + (0 + 1 + %1)*mmsize + %6], m11 ; m1 conflict
movaps m4, [outq + %4 + (0 + 1 + %1)*mmsize + %6]
movaps m6, [outq + %4 + (2 + 1 + %1)*mmsize + %6]
movaps m5, [outq + %5 + (0 + 1 + %1)*mmsize + %6]
movaps m7, [outq + %5 + (2 + 1 + %1)*mmsize + %6]
movaps [outq + %4 + (0 + 1 + %1)*mmsize + %6], m12 ; m4 conflict
movaps [outq + %5 + (0 + 1 + %1)*mmsize + %6], m13 ; m5 conflict
SPLIT_RADIX_COMBINE 0, m0, m1, m2, m3, \
m4, m5, m6, m7, \
m8, m9, \
m10, m11, m12, m13, m14, m15 ; temporary registers
unpcklpd m8, m0, m2
unpcklpd m9, m1, m3
unpcklpd m10, m4, m6
unpcklpd m11, m5, m7
unpckhpd m0, m0, m2
unpckhpd m1, m1, m3
unpckhpd m4, m4, m6
unpckhpd m5, m5, m7
vextractf128 [outq + (2 + 0 + %1)*mmsize + %6 + 0], m8, 0
vextractf128 [outq + (2 + 0 + %1)*mmsize + %6 + 16], m0, 0
vextractf128 [outq + (2 + 1 + %1)*mmsize + %6 + 0], m8, 1
vextractf128 [outq + (2 + 1 + %1)*mmsize + %6 + 16], m0, 1
vextractf128 [outq + %3 + (2 + 0 + %1)*mmsize + %6 + 0], m9, 0
vextractf128 [outq + %3 + (2 + 0 + %1)*mmsize + %6 + 16], m1, 0
vextractf128 [outq + %3 + (2 + 1 + %1)*mmsize + %6 + 0], m9, 1
vextractf128 [outq + %3 + (2 + 1 + %1)*mmsize + %6 + 16], m1, 1
vextractf128 [outq + %4 + (2 + 0 + %1)*mmsize + %6 + 0], m10, 0
vextractf128 [outq + %4 + (2 + 0 + %1)*mmsize + %6 + 16], m4, 0
vextractf128 [outq + %4 + (2 + 1 + %1)*mmsize + %6 + 0], m10, 1
vextractf128 [outq + %4 + (2 + 1 + %1)*mmsize + %6 + 16], m4, 1
vextractf128 [outq + %5 + (2 + 0 + %1)*mmsize + %6 + 0], m11, 0
vextractf128 [outq + %5 + (2 + 0 + %1)*mmsize + %6 + 16], m5, 0
vextractf128 [outq + %5 + (2 + 1 + %1)*mmsize + %6 + 0], m11, 1
vextractf128 [outq + %5 + (2 + 1 + %1)*mmsize + %6 + 16], m5, 1
%endmacro
%macro SPLIT_RADIX_COMBINE_DEINTERLEAVE_FULL 2-3
%if %0 > 2
%define offset %3
%else
%define offset 0
%endif
SPLIT_RADIX_COMBINE_DEINTERLEAVE_2 0, 0, %1, %1*2, %2, offset
SPLIT_RADIX_COMBINE_DEINTERLEAVE_2 4, 2, %1, %1*2, %2, offset
%endmacro
INIT_XMM sse3
cglobal fft2_float, 4, 4, 2, ctx, out, in, stride
movaps m0, [inq]
FFT2 m0, m1
movaps [outq], m0
RET
%macro FFT4 2
INIT_XMM sse2
cglobal fft4_ %+ %1 %+ _float, 4, 4, 3, ctx, out, in, stride
movaps m0, [inq + 0*mmsize]
movaps m1, [inq + 1*mmsize]
%if %2
shufps m2, m1, m0, q3210
shufps m0, m0, m1, q3210
movaps m1, m2
%endif
FFT4 m0, m1, m2
unpcklpd m2, m0, m1
unpckhpd m0, m0, m1
movaps [outq + 0*mmsize], m2
movaps [outq + 1*mmsize], m0
RET
%endmacro
FFT4 fwd, 0
FFT4 inv, 1
%macro FFT8_SSE_FN 2
INIT_XMM sse3
cglobal fft8_ %+ %1, 4, 4, 6, ctx, out, in, tmp
%if %2
mov ctxq, [ctxq + AVTXContext.map]
LOAD64_LUT m0, inq, ctxq, (mmsize/2)*0, tmpq
LOAD64_LUT m1, inq, ctxq, (mmsize/2)*1, tmpq
LOAD64_LUT m2, inq, ctxq, (mmsize/2)*2, tmpq
LOAD64_LUT m3, inq, ctxq, (mmsize/2)*3, tmpq
%else
movaps m0, [inq + 0*mmsize]
movaps m1, [inq + 1*mmsize]
movaps m2, [inq + 2*mmsize]
movaps m3, [inq + 3*mmsize]
%endif
FFT8 m0, m1, m2, m3, m4, m5
unpcklpd m4, m0, m3
unpcklpd m5, m1, m2
unpckhpd m0, m0, m3
unpckhpd m1, m1, m2
movups [outq + 0*mmsize], m4
movups [outq + 1*mmsize], m0
movups [outq + 2*mmsize], m5
movups [outq + 3*mmsize], m1
RET
%endmacro
FFT8_SSE_FN float, 1
FFT8_SSE_FN ns_float, 0
%macro FFT8_AVX_FN 2
INIT_YMM avx
cglobal fft8_ %+ %1, 4, 4, 4, ctx, out, in, tmp
%if %2
mov ctxq, [ctxq + AVTXContext.map]
LOAD64_LUT m0, inq, ctxq, (mmsize/2)*0, tmpq, m2
LOAD64_LUT m1, inq, ctxq, (mmsize/2)*1, tmpq, m3
%else
movaps m0, [inq + 0*mmsize]
movaps m1, [inq + 1*mmsize]
%endif
FFT8_AVX m0, m1, m2, m3
unpcklpd m2, m0, m1
unpckhpd m0, m0, m1
; Around 2% faster than 2x vperm2f128 + 2x movapd
vextractf128 [outq + 16*0], m2, 0
vextractf128 [outq + 16*1], m0, 0
vextractf128 [outq + 16*2], m2, 1
vextractf128 [outq + 16*3], m0, 1
RET
%endmacro
FFT8_AVX_FN float, 1
FFT8_AVX_FN ns_float, 0
%macro FFT16_FN 3
INIT_YMM %1
cglobal fft16_ %+ %2, 4, 4, 8, ctx, out, in, tmp
%if %3
movaps m0, [inq + 0*mmsize]
movaps m1, [inq + 1*mmsize]
movaps m2, [inq + 2*mmsize]
movaps m3, [inq + 3*mmsize]
%else
mov ctxq, [ctxq + AVTXContext.map]
LOAD64_LUT m0, inq, ctxq, (mmsize/2)*0, tmpq, m4
LOAD64_LUT m1, inq, ctxq, (mmsize/2)*1, tmpq, m5
LOAD64_LUT m2, inq, ctxq, (mmsize/2)*2, tmpq, m6
LOAD64_LUT m3, inq, ctxq, (mmsize/2)*3, tmpq, m7
%endif
FFT16 m0, m1, m2, m3, m4, m5, m6, m7
unpcklpd m5, m1, m3
unpcklpd m4, m0, m2
unpckhpd m1, m1, m3
unpckhpd m0, m0, m2
vextractf128 [outq + 16*0], m4, 0
vextractf128 [outq + 16*1], m0, 0
vextractf128 [outq + 16*2], m4, 1
vextractf128 [outq + 16*3], m0, 1
vextractf128 [outq + 16*4], m5, 0
vextractf128 [outq + 16*5], m1, 0
vextractf128 [outq + 16*6], m5, 1
vextractf128 [outq + 16*7], m1, 1
RET
%endmacro
FFT16_FN avx, float, 0
FFT16_FN avx, ns_float, 1
FFT16_FN fma3, float, 0
FFT16_FN fma3, ns_float, 1
%macro FFT32_FN 3
INIT_YMM %1
cglobal fft32_ %+ %2, 4, 4, 16, ctx, out, in, tmp
%if %3
movaps m4, [inq + 4*mmsize]
movaps m5, [inq + 5*mmsize]
movaps m6, [inq + 6*mmsize]
movaps m7, [inq + 7*mmsize]
%else
mov ctxq, [ctxq + AVTXContext.map]
LOAD64_LUT m4, inq, ctxq, (mmsize/2)*4, tmpq, m8, m12
LOAD64_LUT m5, inq, ctxq, (mmsize/2)*5, tmpq, m9, m13
LOAD64_LUT m6, inq, ctxq, (mmsize/2)*6, tmpq, m10, m14
LOAD64_LUT m7, inq, ctxq, (mmsize/2)*7, tmpq, m11, m15
%endif
FFT8 m4, m5, m6, m7, m8, m9
%if %3
movaps m0, [inq + 0*mmsize]
movaps m1, [inq + 1*mmsize]
movaps m2, [inq + 2*mmsize]
movaps m3, [inq + 3*mmsize]
%else
LOAD64_LUT m0, inq, ctxq, (mmsize/2)*0, tmpq, m8, m12
LOAD64_LUT m1, inq, ctxq, (mmsize/2)*1, tmpq, m9, m13
LOAD64_LUT m2, inq, ctxq, (mmsize/2)*2, tmpq, m10, m14
LOAD64_LUT m3, inq, ctxq, (mmsize/2)*3, tmpq, m11, m15
%endif
movaps m8, [tab_32_float]
vperm2f128 m9, m9, [tab_32_float + 4*8 - 4*7], 0x23
FFT16 m0, m1, m2, m3, m10, m11, m12, m13
SPLIT_RADIX_COMBINE 1, m0, m1, m2, m3, m4, m5, m6, m7, m8, m9, \
m10, m11, m12, m13, m14, m15 ; temporary registers
unpcklpd m9, m1, m3
unpcklpd m10, m5, m7
unpcklpd m8, m0, m2
unpcklpd m11, m4, m6
unpckhpd m1, m1, m3
unpckhpd m5, m5, m7
unpckhpd m0, m0, m2
unpckhpd m4, m4, m6
vextractf128 [outq + 16* 0], m8, 0
vextractf128 [outq + 16* 1], m0, 0
vextractf128 [outq + 16* 2], m8, 1
vextractf128 [outq + 16* 3], m0, 1
vextractf128 [outq + 16* 4], m9, 0
vextractf128 [outq + 16* 5], m1, 0
vextractf128 [outq + 16* 6], m9, 1
vextractf128 [outq + 16* 7], m1, 1
vextractf128 [outq + 16* 8], m11, 0
vextractf128 [outq + 16* 9], m4, 0
vextractf128 [outq + 16*10], m11, 1
vextractf128 [outq + 16*11], m4, 1
vextractf128 [outq + 16*12], m10, 0
vextractf128 [outq + 16*13], m5, 0
vextractf128 [outq + 16*14], m10, 1
vextractf128 [outq + 16*15], m5, 1
RET
%endmacro
%if ARCH_X86_64
FFT32_FN avx, float, 0
FFT32_FN avx, ns_float, 1
FFT32_FN fma3, float, 0
FFT32_FN fma3, ns_float, 1
%endif
%macro FFT_SPLIT_RADIX_DEF 1-2
ALIGN 16
.%1 %+ pt:
PUSH lenq
mov lenq, (%1/4)
add outq, (%1*4) - (%1/1)
call .32pt
add outq, (%1*2) - (%1/2) ; the synth loops also increment outq
call .32pt
POP lenq
sub outq, (%1*4) + (%1*2) + (%1/2)
lea rtabq, [tab_ %+ %1 %+ _float]
lea itabq, [tab_ %+ %1 %+ _float + %1 - 4*7]
%if %0 > 1
cmp tgtq, %1
je .deinterleave
mov tmpq, %1
.synth_ %+ %1:
SPLIT_RADIX_LOAD_COMBINE_FULL 2*%1, 6*%1, 0, 0, 0
add outq, 8*mmsize
add rtabq, 4*mmsize
sub itabq, 4*mmsize
sub tmpq, 4*mmsize
jg .synth_ %+ %1
cmp lenq, %1
jg %2 ; can't do math here, nasm doesn't get it
ret
%endif
%endmacro
%macro FFT_SPLIT_RADIX_FN 3
INIT_YMM %1
cglobal fft_sr_ %+ %2, 4, 8, 16, 272, lut, out, in, len, tmp, itab, rtab, tgt
movsxd lenq, dword [lutq + AVTXContext.len]
mov lutq, [lutq + AVTXContext.map]
mov tgtq, lenq
; Bottom-most/32-point transform ===============================================
ALIGN 16
.32pt:
%if %3
movaps m4, [inq + 4*mmsize]
movaps m5, [inq + 5*mmsize]
movaps m6, [inq + 6*mmsize]
movaps m7, [inq + 7*mmsize]
%else
LOAD64_LUT m4, inq, lutq, (mmsize/2)*4, tmpq, m8, m12
LOAD64_LUT m5, inq, lutq, (mmsize/2)*5, tmpq, m9, m13
LOAD64_LUT m6, inq, lutq, (mmsize/2)*6, tmpq, m10, m14
LOAD64_LUT m7, inq, lutq, (mmsize/2)*7, tmpq, m11, m15
%endif
FFT8 m4, m5, m6, m7, m8, m9
%if %3
movaps m0, [inq + 0*mmsize]
movaps m1, [inq + 1*mmsize]
movaps m2, [inq + 2*mmsize]
movaps m3, [inq + 3*mmsize]
%else
LOAD64_LUT m0, inq, lutq, (mmsize/2)*0, tmpq, m8, m12
LOAD64_LUT m1, inq, lutq, (mmsize/2)*1, tmpq, m9, m13
LOAD64_LUT m2, inq, lutq, (mmsize/2)*2, tmpq, m10, m14
LOAD64_LUT m3, inq, lutq, (mmsize/2)*3, tmpq, m11, m15
%endif
movaps m8, [tab_32_float]
vperm2f128 m9, m9, [tab_32_float + 32 - 4*7], 0x23
FFT16 m0, m1, m2, m3, m10, m11, m12, m13
SPLIT_RADIX_COMBINE 1, m0, m1, m2, m3, m4, m5, m6, m7, m8, m9, \
m10, m11, m12, m13, m14, m15 ; temporary registers
movaps [outq + 1*mmsize], m1
movaps [outq + 3*mmsize], m3
movaps [outq + 5*mmsize], m5
movaps [outq + 7*mmsize], m7
%if %3
add inq, 8*mmsize
%else
add lutq, (mmsize/2)*8
%endif
cmp lenq, 32
jg .64pt
movaps [outq + 0*mmsize], m0
movaps [outq + 2*mmsize], m2
movaps [outq + 4*mmsize], m4
movaps [outq + 6*mmsize], m6
ret
; 64-point transform ===========================================================
ALIGN 16
.64pt:
; Helper defines, these make it easier to track what's happening
%define tx1_e0 m4
%define tx1_e1 m5
%define tx1_o0 m6
%define tx1_o1 m7
%define tx2_e0 m8
%define tx2_e1 m9
%define tx2_o0 m10
%define tx2_o1 m11
%define tw_e m12
%define tw_o m13
%define tmp1 m14
%define tmp2 m15
SWAP m4, m1
SWAP m6, m3
%if %3
movaps tx1_e0, [inq + 0*mmsize]
movaps tx1_e1, [inq + 1*mmsize]
movaps tx1_o0, [inq + 2*mmsize]
movaps tx1_o1, [inq + 3*mmsize]
%else
LOAD64_LUT tx1_e0, inq, lutq, (mmsize/2)*0, tmpq, tw_e, tmp1
LOAD64_LUT tx1_e1, inq, lutq, (mmsize/2)*1, tmpq, tw_o, tmp2
LOAD64_LUT tx1_o0, inq, lutq, (mmsize/2)*2, tmpq, tw_e, tmp1
LOAD64_LUT tx1_o1, inq, lutq, (mmsize/2)*3, tmpq, tw_o, tmp2
%endif
FFT16 tx1_e0, tx1_e1, tx1_o0, tx1_o1, tw_e, tw_o, tx2_o0, tx2_o1
%if %3
movaps tx2_e0, [inq + 4*mmsize]
movaps tx2_e1, [inq + 5*mmsize]
movaps tx2_o0, [inq + 6*mmsize]
movaps tx2_o1, [inq + 7*mmsize]
%else
LOAD64_LUT tx2_e0, inq, lutq, (mmsize/2)*4, tmpq, tw_e, tmp1
LOAD64_LUT tx2_e1, inq, lutq, (mmsize/2)*5, tmpq, tw_o, tmp2
LOAD64_LUT tx2_o0, inq, lutq, (mmsize/2)*6, tmpq, tw_e, tmp1
LOAD64_LUT tx2_o1, inq, lutq, (mmsize/2)*7, tmpq, tw_o, tmp2
%endif
FFT16 tx2_e0, tx2_e1, tx2_o0, tx2_o1, tmp1, tmp2, tw_e, tw_o
movaps tw_e, [tab_64_float]
vperm2f128 tw_o, tw_o, [tab_64_float + 64 - 4*7], 0x23
%if %3
add inq, 8*mmsize
%else
add lutq, (mmsize/2)*8
%endif
cmp tgtq, 64
je .64pt_deint
SPLIT_RADIX_COMBINE_64
cmp lenq, 64
jg .128pt
ret
; 128-point transform ==========================================================
ALIGN 16
.128pt:
PUSH lenq
mov lenq, 32
add outq, 16*mmsize
call .32pt
add outq, 8*mmsize
call .32pt
POP lenq
sub outq, 24*mmsize
lea rtabq, [tab_128_float]
lea itabq, [tab_128_float + 128 - 4*7]
cmp tgtq, 128
je .deinterleave
SPLIT_RADIX_LOAD_COMBINE_FULL 2*128, 6*128
cmp lenq, 128
jg .256pt
ret
; 256-point transform ==========================================================
ALIGN 16
.256pt:
PUSH lenq
mov lenq, 64
add outq, 32*mmsize
call .32pt
add outq, 16*mmsize
call .32pt
POP lenq
sub outq, 48*mmsize
lea rtabq, [tab_256_float]
lea itabq, [tab_256_float + 256 - 4*7]
cmp tgtq, 256
je .deinterleave
SPLIT_RADIX_LOAD_COMBINE_FULL 2*256, 6*256
SPLIT_RADIX_LOAD_COMBINE_FULL 2*256, 6*256, 8*mmsize, 4*mmsize, -4*mmsize
cmp lenq, 256
jg .512pt
ret
; 512-point transform ==========================================================
ALIGN 16
.512pt:
PUSH lenq
mov lenq, 128
add outq, 64*mmsize
call .32pt
add outq, 32*mmsize
call .32pt
POP lenq
sub outq, 96*mmsize
lea rtabq, [tab_512_float]
lea itabq, [tab_512_float + 512 - 4*7]
cmp tgtq, 512
je .deinterleave
mov tmpq, 4
.synth_512:
SPLIT_RADIX_LOAD_COMBINE_FULL 2*512, 6*512
add outq, 8*mmsize
add rtabq, 4*mmsize
sub itabq, 4*mmsize
sub tmpq, 1
jg .synth_512
cmp lenq, 512
jg .1024pt
ret
; 1024-point transform ==========================================================
ALIGN 16
.1024pt:
PUSH lenq
mov lenq, 256
add outq, 96*mmsize
call .32pt
add outq, 64*mmsize
call .32pt
POP lenq
sub outq, 192*mmsize
lea rtabq, [tab_1024_float]
lea itabq, [tab_1024_float + 1024 - 4*7]
cmp tgtq, 1024
je .deinterleave
mov tmpq, 8
.synth_1024:
SPLIT_RADIX_LOAD_COMBINE_FULL 2*1024, 6*1024
add outq, 8*mmsize
add rtabq, 4*mmsize
sub itabq, 4*mmsize
sub tmpq, 1
jg .synth_1024
cmp lenq, 1024
jg .2048pt
ret
; 2048 to 131072-point transforms ==============================================
FFT_SPLIT_RADIX_DEF 2048, .4096pt
FFT_SPLIT_RADIX_DEF 4096, .8192pt
FFT_SPLIT_RADIX_DEF 8192, .16384pt
FFT_SPLIT_RADIX_DEF 16384, .32768pt
FFT_SPLIT_RADIX_DEF 32768, .65536pt
FFT_SPLIT_RADIX_DEF 65536, .131072pt
FFT_SPLIT_RADIX_DEF 131072
;===============================================================================
; Final synthesis + deinterleaving code
;===============================================================================
.deinterleave:
imul tmpq, lenq, 2
lea lutq, [4*lenq + tmpq]
.synth_deinterleave:
SPLIT_RADIX_COMBINE_DEINTERLEAVE_FULL tmpq, lutq
add outq, 8*mmsize
add rtabq, 4*mmsize
sub itabq, 4*mmsize
sub lenq, 4*mmsize
jg .synth_deinterleave
RET
; 64-point deinterleave which only has to load 4 registers =====================
.64pt_deint:
SPLIT_RADIX_COMBINE_LITE 1, m0, m1, tx1_e0, tx2_e0, tw_e, tw_o, tmp1, tmp2
SPLIT_RADIX_COMBINE_HALF 0, m2, m3, tx1_o0, tx2_o0, tw_e, tw_o, tmp1, tmp2, tw_e
unpcklpd tmp1, m0, m2
unpcklpd tmp2, m1, m3
unpcklpd tw_o, tx1_e0, tx1_o0
unpcklpd tw_e, tx2_e0, tx2_o0
unpckhpd m0, m0, m2
unpckhpd m1, m1, m3
unpckhpd tx1_e0, tx1_e0, tx1_o0
unpckhpd tx2_e0, tx2_e0, tx2_o0
vextractf128 [outq + 0*mmsize + 0], tmp1, 0
vextractf128 [outq + 0*mmsize + 16], m0, 0
vextractf128 [outq + 4*mmsize + 0], tmp2, 0
vextractf128 [outq + 4*mmsize + 16], m1, 0
vextractf128 [outq + 8*mmsize + 0], tw_o, 0
vextractf128 [outq + 8*mmsize + 16], tx1_e0, 0
vextractf128 [outq + 9*mmsize + 0], tw_o, 1
vextractf128 [outq + 9*mmsize + 16], tx1_e0, 1
vperm2f128 tmp1, tmp1, m0, 0x31
vperm2f128 tmp2, tmp2, m1, 0x31
vextractf128 [outq + 12*mmsize + 0], tw_e, 0
vextractf128 [outq + 12*mmsize + 16], tx2_e0, 0
vextractf128 [outq + 13*mmsize + 0], tw_e, 1
vextractf128 [outq + 13*mmsize + 16], tx2_e0, 1
movaps tw_e, [tab_64_float + mmsize]
vperm2f128 tw_o, tw_o, [tab_64_float + 64 - 4*7 - mmsize], 0x23
movaps m0, [outq + 1*mmsize]
movaps m1, [outq + 3*mmsize]
movaps m2, [outq + 5*mmsize]
movaps m3, [outq + 7*mmsize]
movaps [outq + 1*mmsize], tmp1
movaps [outq + 5*mmsize], tmp2
SPLIT_RADIX_COMBINE 0, m0, m2, m1, m3, tx1_e1, tx2_e1, tx1_o1, tx2_o1, tw_e, tw_o, \
tmp1, tmp2, tx2_o0, tx1_o0, tx2_e0, tx1_e0 ; temporary registers
unpcklpd tmp1, m0, m1
unpcklpd tmp2, m2, m3
unpcklpd tw_e, tx1_e1, tx1_o1
unpcklpd tw_o, tx2_e1, tx2_o1
unpckhpd m0, m0, m1
unpckhpd m2, m2, m3
unpckhpd tx1_e1, tx1_e1, tx1_o1
unpckhpd tx2_e1, tx2_e1, tx2_o1
vextractf128 [outq + 2*mmsize + 0], tmp1, 0
vextractf128 [outq + 2*mmsize + 16], m0, 0
vextractf128 [outq + 3*mmsize + 0], tmp1, 1
vextractf128 [outq + 3*mmsize + 16], m0, 1
vextractf128 [outq + 6*mmsize + 0], tmp2, 0
vextractf128 [outq + 6*mmsize + 16], m2, 0
vextractf128 [outq + 7*mmsize + 0], tmp2, 1
vextractf128 [outq + 7*mmsize + 16], m2, 1
vextractf128 [outq + 10*mmsize + 0], tw_e, 0
vextractf128 [outq + 10*mmsize + 16], tx1_e1, 0
vextractf128 [outq + 11*mmsize + 0], tw_e, 1
vextractf128 [outq + 11*mmsize + 16], tx1_e1, 1
vextractf128 [outq + 14*mmsize + 0], tw_o, 0
vextractf128 [outq + 14*mmsize + 16], tx2_e1, 0
vextractf128 [outq + 15*mmsize + 0], tw_o, 1
vextractf128 [outq + 15*mmsize + 16], tx2_e1, 1
RET
%endmacro
%if ARCH_X86_64
FFT_SPLIT_RADIX_FN fma3, float, 0
FFT_SPLIT_RADIX_FN fma3, ns_float, 1
%if HAVE_AVX2_EXTERNAL
FFT_SPLIT_RADIX_FN avx2, float, 0
FFT_SPLIT_RADIX_FN avx2, ns_float, 1
%endif
%endif