ref: f039a4fbb81a76f531df2a7b3bf405a89072bf5e
dir: /libfaad/cfft.c/
/*
** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
** Copyright (C) 2003-2004 M. Bakker, Ahead Software AG, http://www.nero.com
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
**
** Any non-GPL usage of this software or parts of this software is strictly
** forbidden.
**
** Commercial non-GPL licensing of this software is possible.
** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
**
** $Id: cfft.c,v 1.25 2004/02/26 09:29:26 menno Exp $
**/
/*
* Algorithmically based on Fortran-77 FFTPACK
* by Paul N. Swarztrauber(Version 4, 1985).
*
* Does even sized fft only
*/
/* isign is +1 for backward and -1 for forward transforms */
#include "common.h"
#include "structs.h"
#include <stdlib.h>
#include "cfft.h"
#include "cfft_tab.h"
/* static function declarations */
#ifdef USE_SSE
static void passf2pos_sse(const uint16_t l1, const complex_t *cc,
complex_t *ch, const complex_t *wa);
static void passf2pos_sse_ido(const uint16_t ido, const uint16_t l1, const complex_t *cc,
complex_t *ch, const complex_t *wa);
static void passf4pos_sse_ido(const uint16_t ido, const uint16_t l1, const complex_t *cc, complex_t *ch,
const complex_t *wa1, const complex_t *wa2, const complex_t *wa3);
#endif
static void passf2pos(const uint16_t ido, const uint16_t l1, const complex_t *cc,
complex_t *ch, const complex_t *wa);
static void passf2neg(const uint16_t ido, const uint16_t l1, const complex_t *cc,
complex_t *ch, const complex_t *wa);
static void passf3(const uint16_t ido, const uint16_t l1, const complex_t *cc,
complex_t *ch, const complex_t *wa1, const complex_t *wa2, const int8_t isign);
static void passf4pos(const uint16_t ido, const uint16_t l1, const complex_t *cc, complex_t *ch,
const complex_t *wa1, const complex_t *wa2, const complex_t *wa3);
static void passf4neg(const uint16_t ido, const uint16_t l1, const complex_t *cc, complex_t *ch,
const complex_t *wa1, const complex_t *wa2, const complex_t *wa3);
static void passf5(const uint16_t ido, const uint16_t l1, const complex_t *cc, complex_t *ch,
const complex_t *wa1, const complex_t *wa2, const complex_t *wa3,
const complex_t *wa4, const int8_t isign);
INLINE void cfftf1(uint16_t n, complex_t *c, complex_t *ch,
const uint16_t *ifac, const complex_t *wa, const int8_t isign);
static void cffti1(uint16_t n, complex_t *wa, uint16_t *ifac);
/*----------------------------------------------------------------------
passf2, passf3, passf4, passf5. Complex FFT passes fwd and bwd.
----------------------------------------------------------------------*/
#if 0 //def USE_SSE
static void passf2pos_sse(const uint16_t l1, const complex_t *cc,
complex_t *ch, const complex_t *wa)
{
uint16_t k, ah, ac;
for (k = 0; k < l1; k++)
{
ah = 2*k;
ac = 4*k;
RE(ch[ah]) = RE(cc[ac]) + RE(cc[ac+1]);
IM(ch[ah]) = IM(cc[ac]) + IM(cc[ac+1]);
RE(ch[ah+l1]) = RE(cc[ac]) - RE(cc[ac+1]);
IM(ch[ah+l1]) = IM(cc[ac]) - IM(cc[ac+1]);
}
}
static void passf2pos_sse_ido(const uint16_t ido, const uint16_t l1, const complex_t *cc,
complex_t *ch, const complex_t *wa)
{
uint16_t i, k, ah, ac;
for (k = 0; k < l1; k++)
{
ah = k*ido;
ac = 2*k*ido;
for (i = 0; i < ido; i+=4)
{
__m128 m1, m2, m3, m4, m5, m6, m7, m8, m9, m10, m11, m12, m13, m14;
__m128 m15, m16, m17, m18, m19, m20, m21, m22, m23, m24;
__m128 w1, w2, w3, w4;
m1 = _mm_load_ps(&RE(cc[ac+i]));
m2 = _mm_load_ps(&RE(cc[ac+ido+i]));
m5 = _mm_load_ps(&RE(cc[ac+i+2]));
m6 = _mm_load_ps(&RE(cc[ac+ido+i+2]));
w1 = _mm_load_ps(&RE(wa[i]));
w3 = _mm_load_ps(&RE(wa[i+2]));
m3 = _mm_add_ps(m1, m2);
m15 = _mm_add_ps(m5, m6);
m4 = _mm_sub_ps(m1, m2);
m16 = _mm_sub_ps(m5, m6);
_mm_store_ps(&RE(ch[ah+i]), m3);
_mm_store_ps(&RE(ch[ah+i+2]), m15);
w2 = _mm_shuffle_ps(w1, w1, _MM_SHUFFLE(2, 3, 0, 1));
w4 = _mm_shuffle_ps(w3, w3, _MM_SHUFFLE(2, 3, 0, 1));
m7 = _mm_mul_ps(m4, w1);
m17 = _mm_mul_ps(m16, w3);
m8 = _mm_mul_ps(m4, w2);
m18 = _mm_mul_ps(m16, w4);
m9 = _mm_shuffle_ps(m7, m8, _MM_SHUFFLE(2, 0, 2, 0));
m19 = _mm_shuffle_ps(m17, m18, _MM_SHUFFLE(2, 0, 2, 0));
m10 = _mm_shuffle_ps(m7, m8, _MM_SHUFFLE(3, 1, 3, 1));
m20 = _mm_shuffle_ps(m17, m18, _MM_SHUFFLE(3, 1, 3, 1));
m11 = _mm_add_ps(m9, m10);
m21 = _mm_add_ps(m19, m20);
m12 = _mm_sub_ps(m9, m10);
m22 = _mm_sub_ps(m19, m20);
m13 = _mm_shuffle_ps(m11, m11, _MM_SHUFFLE(0, 0, 3, 2));
m23 = _mm_shuffle_ps(m21, m21, _MM_SHUFFLE(0, 0, 3, 2));
m14 = _mm_unpacklo_ps(m12, m13);
m24 = _mm_unpacklo_ps(m22, m23);
_mm_store_ps(&RE(ch[ah+i+l1*ido]), m14);
_mm_store_ps(&RE(ch[ah+i+2+l1*ido]), m24);
}
}
}
#endif
static void passf2pos(const uint16_t ido, const uint16_t l1, const complex_t *cc,
complex_t *ch, const complex_t *wa)
{
uint16_t i, k, ah, ac;
if (ido == 1)
{
for (k = 0; k < l1; k++)
{
ah = 2*k;
ac = 4*k;
RE(ch[ah]) = RE(cc[ac]) + RE(cc[ac+1]);
RE(ch[ah+l1]) = RE(cc[ac]) - RE(cc[ac+1]);
IM(ch[ah]) = IM(cc[ac]) + IM(cc[ac+1]);
IM(ch[ah+l1]) = IM(cc[ac]) - IM(cc[ac+1]);
}
} else {
for (k = 0; k < l1; k++)
{
ah = k*ido;
ac = 2*k*ido;
for (i = 0; i < ido; i++)
{
complex_t t2;
RE(ch[ah+i]) = RE(cc[ac+i]) + RE(cc[ac+i+ido]);
RE(t2) = RE(cc[ac+i]) - RE(cc[ac+i+ido]);
IM(ch[ah+i]) = IM(cc[ac+i]) + IM(cc[ac+i+ido]);
IM(t2) = IM(cc[ac+i]) - IM(cc[ac+i+ido]);
#if 1
ComplexMult(&IM(ch[ah+i+l1*ido]), &RE(ch[ah+i+l1*ido]),
IM(t2), RE(t2), RE(wa[i]), IM(wa[i]));
#else
ComplexMult(&RE(ch[ah+i+l1*ido]), &IM(ch[ah+i+l1*ido]),
RE(t2), IM(t2), RE(wa[i]), IM(wa[i]));
#endif
}
}
}
}
static void passf2neg(const uint16_t ido, const uint16_t l1, const complex_t *cc,
complex_t *ch, const complex_t *wa)
{
uint16_t i, k, ah, ac;
if (ido == 1)
{
for (k = 0; k < l1; k++)
{
ah = 2*k;
ac = 4*k;
RE(ch[ah]) = RE(cc[ac]) + RE(cc[ac+1]);
RE(ch[ah+l1]) = RE(cc[ac]) - RE(cc[ac+1]);
IM(ch[ah]) = IM(cc[ac]) + IM(cc[ac+1]);
IM(ch[ah+l1]) = IM(cc[ac]) - IM(cc[ac+1]);
}
} else {
for (k = 0; k < l1; k++)
{
ah = k*ido;
ac = 2*k*ido;
for (i = 0; i < ido; i++)
{
complex_t t2;
RE(ch[ah+i]) = RE(cc[ac+i]) + RE(cc[ac+i+ido]);
RE(t2) = RE(cc[ac+i]) - RE(cc[ac+i+ido]);
IM(ch[ah+i]) = IM(cc[ac+i]) + IM(cc[ac+i+ido]);
IM(t2) = IM(cc[ac+i]) - IM(cc[ac+i+ido]);
#if 1
ComplexMult(&RE(ch[ah+i+l1*ido]), &IM(ch[ah+i+l1*ido]),
RE(t2), IM(t2), RE(wa[i]), IM(wa[i]));
#else
ComplexMult(&IM(ch[ah+i+l1*ido]), &RE(ch[ah+i+l1*ido]),
IM(t2), RE(t2), RE(wa[i]), IM(wa[i]));
#endif
}
}
}
}
static void passf3(const uint16_t ido, const uint16_t l1, const complex_t *cc,
complex_t *ch, const complex_t *wa1, const complex_t *wa2,
const int8_t isign)
{
static real_t taur = FRAC_CONST(-0.5);
static real_t taui = FRAC_CONST(0.866025403784439);
uint16_t i, k, ac, ah;
complex_t c2, c3, d2, d3, t2;
if (ido == 1)
{
if (isign == 1)
{
for (k = 0; k < l1; k++)
{
ac = 3*k+1;
ah = k;
RE(t2) = RE(cc[ac]) + RE(cc[ac+1]);
IM(t2) = IM(cc[ac]) + IM(cc[ac+1]);
RE(c2) = RE(cc[ac-1]) + MUL_F(RE(t2),taur);
IM(c2) = IM(cc[ac-1]) + MUL_F(IM(t2),taur);
RE(ch[ah]) = RE(cc[ac-1]) + RE(t2);
IM(ch[ah]) = IM(cc[ac-1]) + IM(t2);
RE(c3) = MUL_F((RE(cc[ac]) - RE(cc[ac+1])), taui);
IM(c3) = MUL_F((IM(cc[ac]) - IM(cc[ac+1])), taui);
RE(ch[ah+l1]) = RE(c2) - IM(c3);
IM(ch[ah+l1]) = IM(c2) + RE(c3);
RE(ch[ah+2*l1]) = RE(c2) + IM(c3);
IM(ch[ah+2*l1]) = IM(c2) - RE(c3);
}
} else {
for (k = 0; k < l1; k++)
{
ac = 3*k+1;
ah = k;
RE(t2) = RE(cc[ac]) + RE(cc[ac+1]);
IM(t2) = IM(cc[ac]) + IM(cc[ac+1]);
RE(c2) = RE(cc[ac-1]) + MUL_F(RE(t2),taur);
IM(c2) = IM(cc[ac-1]) + MUL_F(IM(t2),taur);
RE(ch[ah]) = RE(cc[ac-1]) + RE(t2);
IM(ch[ah]) = IM(cc[ac-1]) + IM(t2);
RE(c3) = MUL_F((RE(cc[ac]) - RE(cc[ac+1])), taui);
IM(c3) = MUL_F((IM(cc[ac]) - IM(cc[ac+1])), taui);
RE(ch[ah+l1]) = RE(c2) + IM(c3);
IM(ch[ah+l1]) = IM(c2) - RE(c3);
RE(ch[ah+2*l1]) = RE(c2) - IM(c3);
IM(ch[ah+2*l1]) = IM(c2) + RE(c3);
}
}
} else {
if (isign == 1)
{
for (k = 0; k < l1; k++)
{
for (i = 0; i < ido; i++)
{
ac = i + (3*k+1)*ido;
ah = i + k * ido;
RE(t2) = RE(cc[ac]) + RE(cc[ac+ido]);
RE(c2) = RE(cc[ac-ido]) + MUL_F(RE(t2),taur);
IM(t2) = IM(cc[ac]) + IM(cc[ac+ido]);
IM(c2) = IM(cc[ac-ido]) + MUL_F(IM(t2),taur);
RE(ch[ah]) = RE(cc[ac-ido]) + RE(t2);
IM(ch[ah]) = IM(cc[ac-ido]) + IM(t2);
RE(c3) = MUL_F((RE(cc[ac]) - RE(cc[ac+ido])), taui);
IM(c3) = MUL_F((IM(cc[ac]) - IM(cc[ac+ido])), taui);
RE(d2) = RE(c2) - IM(c3);
IM(d3) = IM(c2) - RE(c3);
RE(d3) = RE(c2) + IM(c3);
IM(d2) = IM(c2) + RE(c3);
#if 1
ComplexMult(&IM(ch[ah+l1*ido]), &RE(ch[ah+l1*ido]),
IM(d2), RE(d2), RE(wa1[i]), IM(wa1[i]));
ComplexMult(&IM(ch[ah+2*l1*ido]), &RE(ch[ah+2*l1*ido]),
IM(d3), RE(d3), RE(wa2[i]), IM(wa2[i]));
#else
ComplexMult(&RE(ch[ah+l1*ido]), &IM(ch[ah+l1*ido]),
RE(d2), IM(d2), RE(wa1[i]), IM(wa1[i]));
ComplexMult(&RE(ch[ah+2*l1*ido]), &IM(ch[ah+2*l1*ido]),
RE(d3), IM(d3), RE(wa2[i]), IM(wa2[i]));
#endif
}
}
} else {
for (k = 0; k < l1; k++)
{
for (i = 0; i < ido; i++)
{
ac = i + (3*k+1)*ido;
ah = i + k * ido;
RE(t2) = RE(cc[ac]) + RE(cc[ac+ido]);
RE(c2) = RE(cc[ac-ido]) + MUL_F(RE(t2),taur);
IM(t2) = IM(cc[ac]) + IM(cc[ac+ido]);
IM(c2) = IM(cc[ac-ido]) + MUL_F(IM(t2),taur);
RE(ch[ah]) = RE(cc[ac-ido]) + RE(t2);
IM(ch[ah]) = IM(cc[ac-ido]) + IM(t2);
RE(c3) = MUL_F((RE(cc[ac]) - RE(cc[ac+ido])), taui);
IM(c3) = MUL_F((IM(cc[ac]) - IM(cc[ac+ido])), taui);
RE(d2) = RE(c2) + IM(c3);
IM(d3) = IM(c2) + RE(c3);
RE(d3) = RE(c2) - IM(c3);
IM(d2) = IM(c2) - RE(c3);
#if 1
ComplexMult(&RE(ch[ah+l1*ido]), &IM(ch[ah+l1*ido]),
RE(d2), IM(d2), RE(wa1[i]), IM(wa1[i]));
ComplexMult(&RE(ch[ah+2*l1*ido]), &IM(ch[ah+2*l1*ido]),
RE(d3), IM(d3), RE(wa2[i]), IM(wa2[i]));
#else
ComplexMult(&IM(ch[ah+l1*ido]), &RE(ch[ah+l1*ido]),
IM(d2), RE(d2), RE(wa1[i]), IM(wa1[i]));
ComplexMult(&IM(ch[ah+2*l1*ido]), &RE(ch[ah+2*l1*ido]),
IM(d3), RE(d3), RE(wa2[i]), IM(wa2[i]));
#endif
}
}
}
}
}
#ifdef USE_SSE
ALIGN static const int32_t negate[4] = { 0x0, 0x0, 0x0, 0x80000000 };
__declspec(naked) static void passf4pos_sse(const uint16_t l1, const complex_t *cc,
complex_t *ch, const complex_t *wa1, const complex_t *wa2,
const complex_t *wa3)
{
__asm {
push ebx
mov ebx, esp
and esp, -16
push edi
push esi
sub esp, 8
movzx edi, WORD PTR [ebx+8]
movaps xmm1, XMMWORD PTR negate
test edi, edi
jle l1_is_zero
lea esi, DWORD PTR [edi+edi]
add esi, esi
sub esi, edi
add esi, esi
add esi, esi
add esi, esi
mov eax, DWORD PTR [ebx+16]
add esi, eax
lea ecx, DWORD PTR [edi+edi]
add ecx, ecx
add ecx, ecx
add ecx, ecx
add ecx, eax
lea edx, DWORD PTR [edi+edi]
add edx, edx
add edx, edx
add edx, eax
xor eax, eax
mov DWORD PTR [esp], ebp
mov ebp, DWORD PTR [ebx+12]
fftloop:
lea edi, DWORD PTR [eax+eax]
add edi, edi
movaps xmm2, XMMWORD PTR [ebp+edi*8]
movaps xmm0, XMMWORD PTR [ebp+edi*8+16]
movaps xmm7, XMMWORD PTR [ebp+edi*8+32]
movaps xmm5, XMMWORD PTR [ebp+edi*8+48]
movaps xmm6, xmm2
addps xmm6, xmm0
movaps xmm4, xmm1
xorps xmm4, xmm7
movaps xmm3, xmm1
xorps xmm3, xmm5
xorps xmm2, xmm1
xorps xmm0, xmm1
addps xmm7, xmm5
subps xmm2, xmm0
movaps xmm0, xmm6
shufps xmm0, xmm7, 68
subps xmm4, xmm3
shufps xmm6, xmm7, 238
movaps xmm5, xmm2
shufps xmm5, xmm4, 68
movaps xmm3, xmm0
addps xmm3, xmm6
shufps xmm2, xmm4, 187
subps xmm0, xmm6
movaps xmm4, xmm5
addps xmm4, xmm2
mov edi, DWORD PTR [ebx+16]
movaps XMMWORD PTR [edi+eax*8], xmm3
subps xmm5, xmm2
movaps XMMWORD PTR [edx+eax*8], xmm4
movaps XMMWORD PTR [ecx+eax*8], xmm0
movaps XMMWORD PTR [esi+eax*8], xmm5
add eax, 2
movzx eax, ax
movzx edi, WORD PTR [ebx+8]
cmp eax, edi
jl fftloop
mov ebp, DWORD PTR [esp]
l1_is_zero:
add esp, 8
pop esi
pop edi
mov esp, ebx
pop ebx
ret
}
}
#endif
#if 0
static void passf4pos_sse_ido(const uint16_t ido, const uint16_t l1, const complex_t *cc,
complex_t *ch, const complex_t *wa1, const complex_t *wa2,
const complex_t *wa3)
{
uint16_t i, k, ac, ah;
for (k = 0; k < l1; k++)
{
ac = 4*k*ido;
ah = k*ido;
for (i = 0; i < ido; i+=2)
{
__m128 m1, m2, m3, m4, m5, m6, m7, m8, m9, m10, m11, m12, m13, m14, m15, m16;
__m128 n1, n2, n3, n4, n5, n6, n7, n8, n9, m17, m18, m19, m20, m21, m22, m23;
__m128 w1, w2, w3, w4, w5, w6, m24, m25, m26, m27, m28, m29, m30;
__m128 neg1 = _mm_set_ps(-1.0, 1.0, -1.0, 1.0);
m1 = _mm_load_ps(&RE(cc[ac+i]));
m2 = _mm_load_ps(&RE(cc[ac+i+2*ido]));
m3 = _mm_add_ps(m1, m2);
m4 = _mm_sub_ps(m1, m2);
n1 = _mm_load_ps(&RE(cc[ac+i+ido]));
n2 = _mm_load_ps(&RE(cc[ac+i+3*ido]));
n3 = _mm_add_ps(n1, n2);
n4 = _mm_mul_ps(neg1, n1);
n5 = _mm_mul_ps(neg1, n2);
n6 = _mm_sub_ps(n4, n5);
m5 = _mm_add_ps(m3, n3);
n7 = _mm_shuffle_ps(n6, n6, _MM_SHUFFLE(2, 3, 0, 1));
n8 = _mm_add_ps(m4, n7);
m6 = _mm_sub_ps(m3, n3);
n9 = _mm_sub_ps(m4, n7);
_mm_store_ps(&RE(ch[ah+i]), m5);
#if 0
static INLINE void ComplexMult(real_t *y1, real_t *y2,
real_t x1, real_t x2, real_t c1, real_t c2)
{
*y1 = MUL_F(x1, c1) + MUL_F(x2, c2);
*y2 = MUL_F(x2, c1) - MUL_F(x1, c2);
}
m7.0 = RE(c2)*RE(wa1[i])
m7.1 = IM(c2)*IM(wa1[i])
m7.2 = RE(c6)*RE(wa1[i+1])
m7.3 = IM(c6)*IM(wa1[i+1])
m8.0 = RE(c2)*IM(wa1[i])
m8.1 = IM(c2)*RE(wa1[i])
m8.2 = RE(c6)*IM(wa1[i+1])
m8.3 = IM(c6)*RE(wa1[i+1])
RE(0) = m7.0 - m7.1
IM(0) = m8.0 + m8.1
RE(1) = m7.2 - m7.3
IM(1) = m8.2 + m8.3
////
RE(0) = RE(c2)*RE(wa1[i]) - IM(c2)*IM(wa1[i])
IM(0) = RE(c2)*IM(wa1[i]) + IM(c2)*RE(wa1[i])
RE(1) = RE(c6)*RE(wa1[i+1]) - IM(c6)*IM(wa1[i+1])
IM(1) = RE(c6)*IM(wa1[i+1]) + IM(c6)*RE(wa1[i+1])
#endif
w1 = _mm_load_ps(&RE(wa1[i]));
w3 = _mm_load_ps(&RE(wa2[i]));
w5 = _mm_load_ps(&RE(wa3[i]));
w2 = _mm_shuffle_ps(w1, w1, _MM_SHUFFLE(2, 3, 0, 1));
w4 = _mm_shuffle_ps(w3, w3, _MM_SHUFFLE(2, 3, 0, 1));
w6 = _mm_shuffle_ps(w5, w5, _MM_SHUFFLE(2, 3, 0, 1));
m7 = _mm_mul_ps(n8, w1);
m15 = _mm_mul_ps(m6, w3);
m23 = _mm_mul_ps(n9, w5);
m8 = _mm_mul_ps(n8, w2);
m16 = _mm_mul_ps(m6, w4);
m24 = _mm_mul_ps(n9, w6);
m9 = _mm_shuffle_ps(m7, m8, _MM_SHUFFLE(2, 0, 2, 0));
m17 = _mm_shuffle_ps(m15, m16, _MM_SHUFFLE(2, 0, 2, 0));
m25 = _mm_shuffle_ps(m23, m24, _MM_SHUFFLE(2, 0, 2, 0));
m10 = _mm_shuffle_ps(m7, m8, _MM_SHUFFLE(3, 1, 3, 1));
m18 = _mm_shuffle_ps(m15, m16, _MM_SHUFFLE(3, 1, 3, 1));
m26 = _mm_shuffle_ps(m23, m24, _MM_SHUFFLE(3, 1, 3, 1));
m11 = _mm_add_ps(m9, m10);
m19 = _mm_add_ps(m17, m18);
m27 = _mm_add_ps(m25, m26);
m12 = _mm_sub_ps(m9, m10);
m20 = _mm_sub_ps(m17, m18);
m28 = _mm_sub_ps(m25, m26);
m13 = _mm_shuffle_ps(m11, m11, _MM_SHUFFLE(0, 0, 3, 2));
m21 = _mm_shuffle_ps(m19, m19, _MM_SHUFFLE(0, 0, 3, 2));
m29 = _mm_shuffle_ps(m27, m27, _MM_SHUFFLE(0, 0, 3, 2));
m14 = _mm_unpacklo_ps(m12, m13);
m22 = _mm_unpacklo_ps(m20, m21);
m30 = _mm_unpacklo_ps(m28, m29);
_mm_store_ps(&RE(ch[ah+i+l1*ido]), m14);
_mm_store_ps(&RE(ch[ah+i+2*l1*ido]), m22);
_mm_store_ps(&RE(ch[ah+i+3*l1*ido]), m30);
}
}
}
#endif
static void passf4pos(const uint16_t ido, const uint16_t l1, const complex_t *cc,
complex_t *ch, const complex_t *wa1, const complex_t *wa2,
const complex_t *wa3)
{
uint16_t i, k, ac, ah;
if (ido == 1)
{
for (k = 0; k < l1; k++)
{
complex_t t1, t2, t3, t4;
ac = 4*k;
ah = k;
RE(t2) = RE(cc[ac]) + RE(cc[ac+2]);
RE(t1) = RE(cc[ac]) - RE(cc[ac+2]);
IM(t2) = IM(cc[ac]) + IM(cc[ac+2]);
IM(t1) = IM(cc[ac]) - IM(cc[ac+2]);
RE(t3) = RE(cc[ac+1]) + RE(cc[ac+3]);
IM(t4) = RE(cc[ac+1]) - RE(cc[ac+3]);
IM(t3) = IM(cc[ac+3]) + IM(cc[ac+1]);
RE(t4) = IM(cc[ac+3]) - IM(cc[ac+1]);
RE(ch[ah]) = RE(t2) + RE(t3);
RE(ch[ah+2*l1]) = RE(t2) - RE(t3);
IM(ch[ah]) = IM(t2) + IM(t3);
IM(ch[ah+2*l1]) = IM(t2) - IM(t3);
RE(ch[ah+l1]) = RE(t1) + RE(t4);
RE(ch[ah+3*l1]) = RE(t1) - RE(t4);
IM(ch[ah+l1]) = IM(t1) + IM(t4);
IM(ch[ah+3*l1]) = IM(t1) - IM(t4);
}
} else {
for (k = 0; k < l1; k++)
{
ac = 4*k*ido;
ah = k*ido;
for (i = 0; i < ido; i++)
{
complex_t c2, c3, c4, t1, t2, t3, t4;
RE(t2) = RE(cc[ac+i]) + RE(cc[ac+i+2*ido]);
RE(t1) = RE(cc[ac+i]) - RE(cc[ac+i+2*ido]);
IM(t2) = IM(cc[ac+i]) + IM(cc[ac+i+2*ido]);
IM(t1) = IM(cc[ac+i]) - IM(cc[ac+i+2*ido]);
RE(t3) = RE(cc[ac+i+ido]) + RE(cc[ac+i+3*ido]);
IM(t4) = RE(cc[ac+i+ido]) - RE(cc[ac+i+3*ido]);
IM(t3) = IM(cc[ac+i+3*ido]) + IM(cc[ac+i+ido]);
RE(t4) = IM(cc[ac+i+3*ido]) - IM(cc[ac+i+ido]);
RE(c2) = RE(t1) + RE(t4);
RE(c4) = RE(t1) - RE(t4);
IM(c2) = IM(t1) + IM(t4);
IM(c4) = IM(t1) - IM(t4);
RE(ch[ah+i]) = RE(t2) + RE(t3);
RE(c3) = RE(t2) - RE(t3);
IM(ch[ah+i]) = IM(t2) + IM(t3);
IM(c3) = IM(t2) - IM(t3);
#if 1
ComplexMult(&IM(ch[ah+i+l1*ido]), &RE(ch[ah+i+l1*ido]),
IM(c2), RE(c2), RE(wa1[i]), IM(wa1[i]));
ComplexMult(&IM(ch[ah+i+2*l1*ido]), &RE(ch[ah+i+2*l1*ido]),
IM(c3), RE(c3), RE(wa2[i]), IM(wa2[i]));
ComplexMult(&IM(ch[ah+i+3*l1*ido]), &RE(ch[ah+i+3*l1*ido]),
IM(c4), RE(c4), RE(wa3[i]), IM(wa3[i]));
#else
ComplexMult(&RE(ch[ah+i+l1*ido]), &IM(ch[ah+i+l1*ido]),
RE(c2), IM(c2), RE(wa1[i]), IM(wa1[i]));
ComplexMult(&RE(ch[ah+i+2*l1*ido]), &IM(ch[ah+i+2*l1*ido]),
RE(c3), IM(c3), RE(wa2[i]), IM(wa2[i]));
ComplexMult(&RE(ch[ah+i+3*l1*ido]), &IM(ch[ah+i+3*l1*ido]),
RE(c4), IM(c4), RE(wa3[i]), IM(wa3[i]));
#endif
}
}
}
}
static void passf4neg(const uint16_t ido, const uint16_t l1, const complex_t *cc,
complex_t *ch, const complex_t *wa1, const complex_t *wa2,
const complex_t *wa3)
{
uint16_t i, k, ac, ah;
if (ido == 1)
{
for (k = 0; k < l1; k++)
{
complex_t t1, t2, t3, t4;
ac = 4*k;
ah = k;
RE(t2) = RE(cc[ac]) + RE(cc[ac+2]);
RE(t1) = RE(cc[ac]) - RE(cc[ac+2]);
IM(t2) = IM(cc[ac]) + IM(cc[ac+2]);
IM(t1) = IM(cc[ac]) - IM(cc[ac+2]);
RE(t3) = RE(cc[ac+1]) + RE(cc[ac+3]);
IM(t4) = RE(cc[ac+1]) - RE(cc[ac+3]);
IM(t3) = IM(cc[ac+3]) + IM(cc[ac+1]);
RE(t4) = IM(cc[ac+3]) - IM(cc[ac+1]);
RE(ch[ah]) = RE(t2) + RE(t3);
RE(ch[ah+2*l1]) = RE(t2) - RE(t3);
IM(ch[ah]) = IM(t2) + IM(t3);
IM(ch[ah+2*l1]) = IM(t2) - IM(t3);
RE(ch[ah+l1]) = RE(t1) - RE(t4);
RE(ch[ah+3*l1]) = RE(t1) + RE(t4);
IM(ch[ah+l1]) = IM(t1) - IM(t4);
IM(ch[ah+3*l1]) = IM(t1) + IM(t4);
}
} else {
for (k = 0; k < l1; k++)
{
ac = 4*k*ido;
ah = k*ido;
for (i = 0; i < ido; i++)
{
complex_t c2, c3, c4, t1, t2, t3, t4;
RE(t2) = RE(cc[ac+i]) + RE(cc[ac+i+2*ido]);
RE(t1) = RE(cc[ac+i]) - RE(cc[ac+i+2*ido]);
IM(t2) = IM(cc[ac+i]) + IM(cc[ac+i+2*ido]);
IM(t1) = IM(cc[ac+i]) - IM(cc[ac+i+2*ido]);
RE(t3) = RE(cc[ac+i+ido]) + RE(cc[ac+i+3*ido]);
IM(t4) = RE(cc[ac+i+ido]) - RE(cc[ac+i+3*ido]);
IM(t3) = IM(cc[ac+i+3*ido]) + IM(cc[ac+i+ido]);
RE(t4) = IM(cc[ac+i+3*ido]) - IM(cc[ac+i+ido]);
RE(c2) = RE(t1) - RE(t4);
RE(c4) = RE(t1) + RE(t4);
IM(c2) = IM(t1) - IM(t4);
IM(c4) = IM(t1) + IM(t4);
RE(ch[ah+i]) = RE(t2) + RE(t3);
RE(c3) = RE(t2) - RE(t3);
IM(ch[ah+i]) = IM(t2) + IM(t3);
IM(c3) = IM(t2) - IM(t3);
#if 1
ComplexMult(&RE(ch[ah+i+l1*ido]), &IM(ch[ah+i+l1*ido]),
RE(c2), IM(c2), RE(wa1[i]), IM(wa1[i]));
ComplexMult(&RE(ch[ah+i+2*l1*ido]), &IM(ch[ah+i+2*l1*ido]),
RE(c3), IM(c3), RE(wa2[i]), IM(wa2[i]));
ComplexMult(&RE(ch[ah+i+3*l1*ido]), &IM(ch[ah+i+3*l1*ido]),
RE(c4), IM(c4), RE(wa3[i]), IM(wa3[i]));
#else
ComplexMult(&IM(ch[ah+i+l1*ido]), &RE(ch[ah+i+l1*ido]),
IM(c2), RE(c2), RE(wa1[i]), IM(wa1[i]));
ComplexMult(&IM(ch[ah+i+2*l1*ido]), &RE(ch[ah+i+2*l1*ido]),
IM(c3), RE(c3), RE(wa2[i]), IM(wa2[i]));
ComplexMult(&IM(ch[ah+i+3*l1*ido]), &RE(ch[ah+i+3*l1*ido]),
IM(c4), RE(c4), RE(wa3[i]), IM(wa3[i]));
#endif
}
}
}
}
static void passf5(const uint16_t ido, const uint16_t l1, const complex_t *cc,
complex_t *ch, const complex_t *wa1, const complex_t *wa2, const complex_t *wa3,
const complex_t *wa4, const int8_t isign)
{
static real_t tr11 = FRAC_CONST(0.309016994374947);
static real_t ti11 = FRAC_CONST(0.951056516295154);
static real_t tr12 = FRAC_CONST(-0.809016994374947);
static real_t ti12 = FRAC_CONST(0.587785252292473);
uint16_t i, k, ac, ah;
complex_t c2, c3, c4, c5, d3, d4, d5, d2, t2, t3, t4, t5;
if (ido == 1)
{
if (isign == 1)
{
for (k = 0; k < l1; k++)
{
ac = 5*k + 1;
ah = k;
RE(t2) = RE(cc[ac]) + RE(cc[ac+3]);
IM(t2) = IM(cc[ac]) + IM(cc[ac+3]);
RE(t3) = RE(cc[ac+1]) + RE(cc[ac+2]);
IM(t3) = IM(cc[ac+1]) + IM(cc[ac+2]);
RE(t4) = RE(cc[ac+1]) - RE(cc[ac+2]);
IM(t4) = IM(cc[ac+1]) - IM(cc[ac+2]);
RE(t5) = RE(cc[ac]) - RE(cc[ac+3]);
IM(t5) = IM(cc[ac]) - IM(cc[ac+3]);
RE(ch[ah]) = RE(cc[ac-1]) + RE(t2) + RE(t3);
IM(ch[ah]) = IM(cc[ac-1]) + IM(t2) + IM(t3);
RE(c2) = RE(cc[ac-1]) + MUL_F(RE(t2),tr11) + MUL_F(RE(t3),tr12);
IM(c2) = IM(cc[ac-1]) + MUL_F(IM(t2),tr11) + MUL_F(IM(t3),tr12);
RE(c3) = RE(cc[ac-1]) + MUL_F(RE(t2),tr12) + MUL_F(RE(t3),tr11);
IM(c3) = IM(cc[ac-1]) + MUL_F(IM(t2),tr12) + MUL_F(IM(t3),tr11);
ComplexMult(&RE(c5), &RE(c4),
ti11, ti12, RE(t5), RE(t4));
ComplexMult(&IM(c5), &IM(c4),
ti11, ti12, IM(t5), IM(t4));
RE(ch[ah+l1]) = RE(c2) - IM(c5);
IM(ch[ah+l1]) = IM(c2) + RE(c5);
RE(ch[ah+2*l1]) = RE(c3) - IM(c4);
IM(ch[ah+2*l1]) = IM(c3) + RE(c4);
RE(ch[ah+3*l1]) = RE(c3) + IM(c4);
IM(ch[ah+3*l1]) = IM(c3) - RE(c4);
RE(ch[ah+4*l1]) = RE(c2) + IM(c5);
IM(ch[ah+4*l1]) = IM(c2) - RE(c5);
}
} else {
for (k = 0; k < l1; k++)
{
ac = 5*k + 1;
ah = k;
RE(t2) = RE(cc[ac]) + RE(cc[ac+3]);
IM(t2) = IM(cc[ac]) + IM(cc[ac+3]);
RE(t3) = RE(cc[ac+1]) + RE(cc[ac+2]);
IM(t3) = IM(cc[ac+1]) + IM(cc[ac+2]);
RE(t4) = RE(cc[ac+1]) - RE(cc[ac+2]);
IM(t4) = IM(cc[ac+1]) - IM(cc[ac+2]);
RE(t5) = RE(cc[ac]) - RE(cc[ac+3]);
IM(t5) = IM(cc[ac]) - IM(cc[ac+3]);
RE(ch[ah]) = RE(cc[ac-1]) + RE(t2) + RE(t3);
IM(ch[ah]) = IM(cc[ac-1]) + IM(t2) + IM(t3);
RE(c2) = RE(cc[ac-1]) + MUL_F(RE(t2),tr11) + MUL_F(RE(t3),tr12);
IM(c2) = IM(cc[ac-1]) + MUL_F(IM(t2),tr11) + MUL_F(IM(t3),tr12);
RE(c3) = RE(cc[ac-1]) + MUL_F(RE(t2),tr12) + MUL_F(RE(t3),tr11);
IM(c3) = IM(cc[ac-1]) + MUL_F(IM(t2),tr12) + MUL_F(IM(t3),tr11);
ComplexMult(&RE(c4), &RE(c5),
ti12, ti11, RE(t5), RE(t4));
ComplexMult(&IM(c4), &IM(c5),
ti12, ti12, IM(t5), IM(t4));
RE(ch[ah+l1]) = RE(c2) + IM(c5);
IM(ch[ah+l1]) = IM(c2) - RE(c5);
RE(ch[ah+2*l1]) = RE(c3) + IM(c4);
IM(ch[ah+2*l1]) = IM(c3) - RE(c4);
RE(ch[ah+3*l1]) = RE(c3) - IM(c4);
IM(ch[ah+3*l1]) = IM(c3) + RE(c4);
RE(ch[ah+4*l1]) = RE(c2) - IM(c5);
IM(ch[ah+4*l1]) = IM(c2) + RE(c5);
}
}
} else {
if (isign == 1)
{
for (k = 0; k < l1; k++)
{
for (i = 0; i < ido; i++)
{
ac = i + (k*5 + 1) * ido;
ah = i + k * ido;
RE(t2) = RE(cc[ac]) + RE(cc[ac+3*ido]);
IM(t2) = IM(cc[ac]) + IM(cc[ac+3*ido]);
RE(t3) = RE(cc[ac+ido]) + RE(cc[ac+2*ido]);
IM(t3) = IM(cc[ac+ido]) + IM(cc[ac+2*ido]);
RE(t4) = RE(cc[ac+ido]) - RE(cc[ac+2*ido]);
IM(t4) = IM(cc[ac+ido]) - IM(cc[ac+2*ido]);
RE(t5) = RE(cc[ac]) - RE(cc[ac+3*ido]);
IM(t5) = IM(cc[ac]) - IM(cc[ac+3*ido]);
RE(ch[ah]) = RE(cc[ac-ido]) + RE(t2) + RE(t3);
IM(ch[ah]) = IM(cc[ac-ido]) + IM(t2) + IM(t3);
RE(c2) = RE(cc[ac-ido]) + MUL_F(RE(t2),tr11) + MUL_F(RE(t3),tr12);
IM(c2) = IM(cc[ac-ido]) + MUL_F(IM(t2),tr11) + MUL_F(IM(t3),tr12);
RE(c3) = RE(cc[ac-ido]) + MUL_F(RE(t2),tr12) + MUL_F(RE(t3),tr11);
IM(c3) = IM(cc[ac-ido]) + MUL_F(IM(t2),tr12) + MUL_F(IM(t3),tr11);
ComplexMult(&RE(c5), &RE(c4),
ti11, ti12, RE(t5), RE(t4));
ComplexMult(&IM(c5), &IM(c4),
ti11, ti12, IM(t5), IM(t4));
IM(d2) = IM(c2) + RE(c5);
IM(d3) = IM(c3) + RE(c4);
RE(d4) = RE(c3) + IM(c4);
RE(d5) = RE(c2) + IM(c5);
RE(d2) = RE(c2) - IM(c5);
IM(d5) = IM(c2) - RE(c5);
RE(d3) = RE(c3) - IM(c4);
IM(d4) = IM(c3) - RE(c4);
#if 1
ComplexMult(&IM(ch[ah+l1*ido]), &RE(ch[ah+l1*ido]),
IM(d2), RE(d2), RE(wa1[i]), IM(wa1[i]));
ComplexMult(&IM(ch[ah+2*l1*ido]), &RE(ch[ah+2*l1*ido]),
IM(d3), RE(d3), RE(wa2[i]), IM(wa2[i]));
ComplexMult(&IM(ch[ah+3*l1*ido]), &RE(ch[ah+3*l1*ido]),
IM(d4), RE(d4), RE(wa3[i]), IM(wa3[i]));
ComplexMult(&IM(ch[ah+4*l1*ido]), &RE(ch[ah+4*l1*ido]),
IM(d5), RE(d5), RE(wa4[i]), IM(wa4[i]));
#else
ComplexMult(&RE(ch[ah+l1*ido]), &IM(ch[ah+l1*ido]),
RE(d2), IM(d2), RE(wa1[i]), IM(wa1[i]));
ComplexMult(&RE(ch[ah+2*l1*ido]), &IM(ch[ah+2*l1*ido]),
RE(d3), IM(d3), RE(wa2[i]), IM(wa2[i]));
ComplexMult(&RE(ch[ah+3*l1*ido]), &IM(ch[ah+3*l1*ido]),
RE(d4), IM(d4), RE(wa3[i]), IM(wa3[i]));
ComplexMult(&RE(ch[ah+4*l1*ido]), &IM(ch[ah+4*l1*ido]),
RE(d5), IM(d5), RE(wa4[i]), IM(wa4[i]));
#endif
}
}
} else {
for (k = 0; k < l1; k++)
{
for (i = 0; i < ido; i++)
{
ac = i + (k*5 + 1) * ido;
ah = i + k * ido;
RE(t2) = RE(cc[ac]) + RE(cc[ac+3*ido]);
IM(t2) = IM(cc[ac]) + IM(cc[ac+3*ido]);
RE(t3) = RE(cc[ac+ido]) + RE(cc[ac+2*ido]);
IM(t3) = IM(cc[ac+ido]) + IM(cc[ac+2*ido]);
RE(t4) = RE(cc[ac+ido]) - RE(cc[ac+2*ido]);
IM(t4) = IM(cc[ac+ido]) - IM(cc[ac+2*ido]);
RE(t5) = RE(cc[ac]) - RE(cc[ac+3*ido]);
IM(t5) = IM(cc[ac]) - IM(cc[ac+3*ido]);
RE(ch[ah]) = RE(cc[ac-ido]) + RE(t2) + RE(t3);
IM(ch[ah]) = IM(cc[ac-ido]) + IM(t2) + IM(t3);
RE(c2) = RE(cc[ac-ido]) + MUL_F(RE(t2),tr11) + MUL_F(RE(t3),tr12);
IM(c2) = IM(cc[ac-ido]) + MUL_F(IM(t2),tr11) + MUL_F(IM(t3),tr12);
RE(c3) = RE(cc[ac-ido]) + MUL_F(RE(t2),tr12) + MUL_F(RE(t3),tr11);
IM(c3) = IM(cc[ac-ido]) + MUL_F(IM(t2),tr12) + MUL_F(IM(t3),tr11);
ComplexMult(&RE(c4), &RE(c5),
ti12, ti11, RE(t5), RE(t4));
ComplexMult(&IM(c4), &IM(c5),
ti12, ti12, IM(t5), IM(t4));
IM(d2) = IM(c2) - RE(c5);
IM(d3) = IM(c3) - RE(c4);
RE(d4) = RE(c3) - IM(c4);
RE(d5) = RE(c2) - IM(c5);
RE(d2) = RE(c2) + IM(c5);
IM(d5) = IM(c2) + RE(c5);
RE(d3) = RE(c3) + IM(c4);
IM(d4) = IM(c3) + RE(c4);
#if 1
ComplexMult(&RE(ch[ah+l1*ido]), &IM(ch[ah+l1*ido]),
RE(d2), IM(d2), RE(wa1[i]), IM(wa1[i]));
ComplexMult(&RE(ch[ah+2*l1*ido]), &IM(ch[ah+2*l1*ido]),
RE(d3), IM(d3), RE(wa2[i]), IM(wa2[i]));
ComplexMult(&RE(ch[ah+3*l1*ido]), &IM(ch[ah+3*l1*ido]),
RE(d4), IM(d4), RE(wa3[i]), IM(wa3[i]));
ComplexMult(&RE(ch[ah+4*l1*ido]), &IM(ch[ah+4*l1*ido]),
RE(d5), IM(d5), RE(wa4[i]), IM(wa4[i]));
#else
ComplexMult(&IM(ch[ah+l1*ido]), &RE(ch[ah+l1*ido]),
IM(d2), RE(d2), RE(wa1[i]), IM(wa1[i]));
ComplexMult(&IM(ch[ah+2*l1*ido]), &RE(ch[ah+2*l1*ido]),
IM(d3), RE(d3), RE(wa2[i]), IM(wa2[i]));
ComplexMult(&IM(ch[ah+3*l1*ido]), &RE(ch[ah+3*l1*ido]),
IM(d4), RE(d4), RE(wa3[i]), IM(wa3[i]));
ComplexMult(&IM(ch[ah+4*l1*ido]), &RE(ch[ah+4*l1*ido]),
IM(d5), RE(d5), RE(wa4[i]), IM(wa4[i]));
#endif
}
}
}
}
}
/*----------------------------------------------------------------------
cfftf1, cfftf, cfftb, cffti1, cffti. Complex FFTs.
----------------------------------------------------------------------*/
#ifdef USE_SSE
#define CONV(A,B,C) ( (A<<2) | ((B & 0x1)<<1) | ((C==1)&0x1) )
static INLINE void cfftf1pos_sse(uint16_t n, complex_t *c, complex_t *ch,
const uint16_t *ifac, const complex_t *wa,
const int8_t isign)
{
uint16_t i;
uint16_t k1, l1, l2;
uint16_t na, nf, ip, iw, ix2, ix3, ix4, ido, idl1;
nf = ifac[1];
na = 0;
l1 = 1;
iw = 0;
for (k1 = 2; k1 <= nf+1; k1++)
{
ip = ifac[k1];
l2 = ip*l1;
ido = n / l2;
idl1 = ido*l1;
ix2 = iw + ido;
ix3 = ix2 + ido;
ix4 = ix3 + ido;
switch (CONV(ip,na,ido))
{
case CONV(4,0,0):
//passf4pos_sse_ido((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)c, ch, &wa[iw], &wa[ix2], &wa[ix3]);
passf4pos((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)c, ch, &wa[iw], &wa[ix2], &wa[ix3]);
break;
case CONV(4,0,1):
passf4pos_sse((const uint16_t)l1, (const complex_t*)c, ch, &wa[iw], &wa[ix2], &wa[ix3]);
break;
case CONV(4,1,0):
passf4pos((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)ch, c, &wa[iw], &wa[ix2], &wa[ix3]);
//passf4pos_sse_ido((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)ch, c, &wa[iw], &wa[ix2], &wa[ix3]);
break;
case CONV(4,1,1):
passf4pos_sse((const uint16_t)l1, (const complex_t*)ch, c, &wa[iw], &wa[ix2], &wa[ix3]);
break;
case CONV(2,0,0):
passf2pos((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)c, ch, &wa[iw]);
//passf2pos_sse_ido((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)c, ch, &wa[iw]);
break;
case CONV(2,0,1):
passf2pos((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)c, ch, &wa[iw]);
//passf2pos_sse((const uint16_t)l1, (const complex_t*)c, ch, &wa[iw]);
break;
case CONV(2,1,0):
passf2pos((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)ch, c, &wa[iw]);
//passf2pos_sse_ido((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)ch, c, &wa[iw]);
break;
case CONV(2,1,1):
passf2pos((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)ch, c, &wa[iw]);
//passf2pos_sse((const uint16_t)l1, (const complex_t*)ch, c, &wa[iw]);
break;
case CONV(3,0,0):
case CONV(3,0,1):
passf3((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)c, ch, &wa[iw], &wa[ix2], isign);
break;
case CONV(3,1,0):
case CONV(3,1,1):
passf3((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)ch, c, &wa[iw], &wa[ix2], isign);
break;
case CONV(5,0,0):
case CONV(5,0,1):
passf5((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)c, ch, &wa[iw], &wa[ix2], &wa[ix3], &wa[ix4], isign);
break;
case CONV(5,1,0):
case CONV(5,1,1):
passf5((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)ch, c, &wa[iw], &wa[ix2], &wa[ix3], &wa[ix4], isign);
break;
}
na = 1 - na;
l1 = l2;
iw += (ip-1) * ido;
}
if (na == 0)
return;
for (i = 0; i < n; i++)
{
RE(c[i]) = RE(ch[i]);
IM(c[i]) = IM(ch[i]);
}
}
#endif
static INLINE void cfftf1pos(uint16_t n, complex_t *c, complex_t *ch,
const uint16_t *ifac, const complex_t *wa,
const int8_t isign)
{
uint16_t i;
uint16_t k1, l1, l2;
uint16_t na, nf, ip, iw, ix2, ix3, ix4, ido, idl1;
nf = ifac[1];
na = 0;
l1 = 1;
iw = 0;
for (k1 = 2; k1 <= nf+1; k1++)
{
ip = ifac[k1];
l2 = ip*l1;
ido = n / l2;
idl1 = ido*l1;
switch (ip)
{
case 4:
ix2 = iw + ido;
ix3 = ix2 + ido;
if (na == 0)
passf4pos((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)c, ch, &wa[iw], &wa[ix2], &wa[ix3]);
else
passf4pos((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)ch, c, &wa[iw], &wa[ix2], &wa[ix3]);
na = 1 - na;
break;
case 2:
if (na == 0)
passf2pos((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)c, ch, &wa[iw]);
else
passf2pos((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)ch, c, &wa[iw]);
na = 1 - na;
break;
case 3:
ix2 = iw + ido;
if (na == 0)
passf3((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)c, ch, &wa[iw], &wa[ix2], isign);
else
passf3((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)ch, c, &wa[iw], &wa[ix2], isign);
na = 1 - na;
break;
case 5:
ix2 = iw + ido;
ix3 = ix2 + ido;
ix4 = ix3 + ido;
if (na == 0)
passf5((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)c, ch, &wa[iw], &wa[ix2], &wa[ix3], &wa[ix4], isign);
else
passf5((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)ch, c, &wa[iw], &wa[ix2], &wa[ix3], &wa[ix4], isign);
na = 1 - na;
break;
}
l1 = l2;
iw += (ip-1) * ido;
}
if (na == 0)
return;
for (i = 0; i < n; i++)
{
RE(c[i]) = RE(ch[i]);
IM(c[i]) = IM(ch[i]);
}
}
static INLINE void cfftf1neg(uint16_t n, complex_t *c, complex_t *ch,
const uint16_t *ifac, const complex_t *wa,
const int8_t isign)
{
uint16_t i;
uint16_t k1, l1, l2;
uint16_t na, nf, ip, iw, ix2, ix3, ix4, ido, idl1;
nf = ifac[1];
na = 0;
l1 = 1;
iw = 0;
for (k1 = 2; k1 <= nf+1; k1++)
{
ip = ifac[k1];
l2 = ip*l1;
ido = n / l2;
idl1 = ido*l1;
switch (ip)
{
case 4:
ix2 = iw + ido;
ix3 = ix2 + ido;
if (na == 0)
passf4neg((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)c, ch, &wa[iw], &wa[ix2], &wa[ix3]);
else
passf4neg((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)ch, c, &wa[iw], &wa[ix2], &wa[ix3]);
na = 1 - na;
break;
case 2:
if (na == 0)
passf2neg((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)c, ch, &wa[iw]);
else
passf2neg((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)ch, c, &wa[iw]);
na = 1 - na;
break;
case 3:
ix2 = iw + ido;
if (na == 0)
passf3((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)c, ch, &wa[iw], &wa[ix2], isign);
else
passf3((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)ch, c, &wa[iw], &wa[ix2], isign);
na = 1 - na;
break;
case 5:
ix2 = iw + ido;
ix3 = ix2 + ido;
ix4 = ix3 + ido;
if (na == 0)
passf5((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)c, ch, &wa[iw], &wa[ix2], &wa[ix3], &wa[ix4], isign);
else
passf5((const uint16_t)ido, (const uint16_t)l1, (const complex_t*)ch, c, &wa[iw], &wa[ix2], &wa[ix3], &wa[ix4], isign);
na = 1 - na;
break;
}
l1 = l2;
iw += (ip-1) * ido;
}
if (na == 0)
return;
for (i = 0; i < n; i++)
{
RE(c[i]) = RE(ch[i]);
IM(c[i]) = IM(ch[i]);
}
}
void cfftf(cfft_info *cfft, complex_t *c)
{
cfftf1neg(cfft->n, c, cfft->work, (const uint16_t*)cfft->ifac, (const complex_t*)cfft->tab, -1);
}
void cfftb(cfft_info *cfft, complex_t *c)
{
cfftf1pos(cfft->n, c, cfft->work, (const uint16_t*)cfft->ifac, (const complex_t*)cfft->tab, +1);
}
#ifdef USE_SSE
void cfftb_sse(cfft_info *cfft, complex_t *c)
{
cfftf1pos_sse(cfft->n, c, cfft->work, (const uint16_t*)cfft->ifac, (const complex_t*)cfft->tab, +1);
}
#endif
static void cffti1(uint16_t n, complex_t *wa, uint16_t *ifac)
{
static uint16_t ntryh[4] = {3, 4, 2, 5};
#ifndef FIXED_POINT
real_t arg, argh, argld, fi;
uint16_t ido, ipm;
uint16_t i1, k1, l1, l2;
uint16_t ld, ii, ip;
#endif
uint16_t ntry = 0, i, j;
uint16_t ib;
uint16_t nf, nl, nq, nr;
nl = n;
nf = 0;
j = 0;
startloop:
j++;
if (j <= 4)
ntry = ntryh[j-1];
else
ntry += 2;
do
{
nq = nl / ntry;
nr = nl - ntry*nq;
if (nr != 0)
goto startloop;
nf++;
ifac[nf+1] = ntry;
nl = nq;
if (ntry == 2 && nf != 1)
{
for (i = 2; i <= nf; i++)
{
ib = nf - i + 2;
ifac[ib+1] = ifac[ib];
}
ifac[2] = 2;
}
} while (nl != 1);
ifac[0] = n;
ifac[1] = nf;
#ifndef FIXED_POINT
argh = (real_t)2.0*(real_t)M_PI / (real_t)n;
i = 0;
l1 = 1;
for (k1 = 1; k1 <= nf; k1++)
{
ip = ifac[k1+1];
ld = 0;
l2 = l1*ip;
ido = n / l2;
ipm = ip - 1;
for (j = 0; j < ipm; j++)
{
i1 = i;
RE(wa[i]) = 1.0;
IM(wa[i]) = 0.0;
ld += l1;
fi = 0;
argld = ld*argh;
for (ii = 0; ii < ido; ii++)
{
i++;
fi++;
arg = fi * argld;
RE(wa[i]) = (real_t)cos(arg);
#if 1
IM(wa[i]) = (real_t)sin(arg);
#else
IM(wa[i]) = (real_t)-sin(arg);
#endif
}
if (ip > 5)
{
RE(wa[i1]) = RE(wa[i]);
IM(wa[i1]) = IM(wa[i]);
}
}
l1 = l2;
}
#endif
}
cfft_info *cffti(uint16_t n)
{
cfft_info *cfft = (cfft_info*)faad_malloc(sizeof(cfft_info));
cfft->n = n;
cfft->work = (complex_t*)faad_malloc(n*sizeof(complex_t));
#ifndef FIXED_POINT
cfft->tab = (complex_t*)faad_malloc(n*sizeof(complex_t));
cffti1(n, cfft->tab, cfft->ifac);
#else
cffti1(n, NULL, cfft->ifac);
switch (n)
{
case 64: cfft->tab = cfft_tab_64; break;
case 512: cfft->tab = cfft_tab_512; break;
#ifdef LD_DEC
case 256: cfft->tab = cfft_tab_256; break;
#endif
#ifdef ALLOW_SMALL_FRAMELENGTH
case 60: cfft->tab = cfft_tab_60; break;
case 480: cfft->tab = cfft_tab_480; break;
#ifdef LD_DEC
case 240: cfft->tab = cfft_tab_240; break;
#endif
#endif
}
#endif
return cfft;
}
void cfftu(cfft_info *cfft)
{
if (cfft->work) faad_free(cfft->work);
#ifndef FIXED_POINT
if (cfft->tab) faad_free(cfft->tab);
#endif
if (cfft) faad_free(cfft);
}