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;******************************************************************************
;* SIMD optimized non-power-of-two MDCT functions
;*
;* Copyright (C) 2017 Rostislav Pehlivanov <atomnuker@gmail.com>
;*
;* 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/x86/x86util.asm"
%if ARCH_X86_64
SECTION_RODATA
sign_adjust_5: dd 0x00000000, 0x80000000, 0x80000000, 0x00000000
SECTION .text
%macro FFT5 3 ; %1 - in_offset, %2 - dst1 (64bit used), %3 - dst2
VBROADCASTSD m0, [inq + %1] ; in[ 0].re, in[ 0].im, in[ 0].re, in[ 0].im
movsd xm1, [inq + 1*16 + 8 + %1] ; in[ 3].re, in[ 3].im, 0, 0
movsd xm4, [inq + 6*16 + 0 + %1] ; in[12].re, in[12].im, 0, 0
movhps xm1, [inq + 3*16 + 0 + %1] ; in[ 3].re, in[ 3].im, in[ 6].re, in[ 6].im
movhps xm4, [inq + 4*16 + 8 + %1] ; in[12].re, in[12].im, in[ 9].re, in[ 9].im
subps xm2, xm1, xm4 ; t[2].im, t[2].re, t[3].im, t[3].re
addps xm1, xm4 ; t[0].re, t[0].im, t[1].re, t[1].im
movhlps %2, xm1 ; t[0].re, t[1].re, t[0].im, t[1].im
addps %2, xm1
addps %2, xm0 ; DC[0].re, DC[0].im, junk...
movlhps %2, %2 ; DC[0].re, DC[0].im, DC[0].re, DC[0].im
shufps xm3, xm1, xm2, q0110 ; t[0].re, t[0].im, t[2].re, t[2].im
shufps xm1, xm2, q2332 ; t[1].re, t[1].im, t[3].re, t[3].im
mulps xm%3, xm1, xm5
mulps xm4, xm3, xm6
mulps xm1, xm6
xorps xm1, xm7
mulps xm3, xm5
addsubps xm3, xm1 ; t[0].re, t[0].im, t[2].re, t[2].im
subps xm%3, xm4 ; t[4].re, t[4].im, t[5].re, t[5].im
movhlps xm2, xm%3, xm3 ; t[2].re, t[2].im, t[5].re, t[5].im
movlhps xm3, xm%3 ; t[0].re, t[0].im, t[4].re, t[4].im
xorps xm2, xm7
addps xm%3, xm2, xm3
subps xm3, xm2
shufps xm3, xm3, q1032
vinsertf128 m%3, m%3, xm3, 1 ; All ACs (tmp[1] through to tmp[4])
addps m%3, m%3, m0 ; Finally offset with DCs
%endmacro
%macro BUTTERFLIES_DC 2 ; %1 - exptab_offset, %2 - out
mulps xm0, xm9, [exptabq + %1 + 16*0]
mulps xm1, xm10, [exptabq + %1 + 16*1]
haddps xm0, xm1
movhlps xm1, xm0 ; t[0].re, t[1].re, t[0].im, t[1].im
addps xm0, xm1
addps xm0, xm8
movsd [%2q], xm0
%endmacro
%macro BUTTERFLIES_AC 2 ; exptab, exptab_offset, src1, src2, src3, out (uses m0-m3)
mulps m0, m12, [exptabq + 64*0 + 0*mmsize + %1]
mulps m1, m12, [exptabq + 64*0 + 1*mmsize + %1]
mulps m2, m13, [exptabq + 64*1 + 0*mmsize + %1]
mulps m3, m13, [exptabq + 64*1 + 1*mmsize + %1]
addps m0, m0, m2
addps m1, m1, m3
addps m0, m0, m11
shufps m1, m1, m1, q2301
addps m0, m0, m1
vextractf128 xm1, m0, 1
movlps [%2q + strideq*1], xm0
movhps [%2q + strideq*2], xm0
movlps [%2q + stride3q], xm1
movhps [%2q + strideq*4], xm1
%endmacro
;*****************************************************************************************
;void ff_fft15_avx(FFTComplex *out, FFTComplex *in, FFTComplex *exptab, ptrdiff_t stride);
;*****************************************************************************************
INIT_YMM avx
cglobal fft15, 4, 6, 14, out, in, exptab, stride, stride3, stride5
%define out0q inq
shl strideq, 3
movaps xm5, [exptabq + 480 + 16*0]
movaps xm6, [exptabq + 480 + 16*1]
movaps xm7, [sign_adjust_5]
FFT5 0, xm8, 11
FFT5 8, xm9, 12
FFT5 16, xm10, 13
lea stride3q, [strideq + strideq*2]
lea stride5q, [strideq + strideq*4]
mov out0q, outq
BUTTERFLIES_DC (8*6 + 4*0)*2*4, out0
lea outq, [out0q + stride5q*1]
BUTTERFLIES_DC (8*6 + 4*1)*2*4, out
lea outq, [out0q + stride5q*2]
BUTTERFLIES_DC (8*6 + 4*2)*2*4, out
BUTTERFLIES_AC (8*0)*2*4, out0
lea outq, [out0q + stride5q*1]
BUTTERFLIES_AC (8*2)*2*4, out
lea outq, [out0q + stride5q*2]
BUTTERFLIES_AC (8*4)*2*4, out
RET
%endif
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