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mpv/liba52/imdct_3dnow.h
michael 01c201dbe8 warning patch by (Dominik Mierzejewski <dominik at rangers dot eu dot org>) 
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@8255 b3059339-0415-0410-9bf9-f77b7e298cf2
2002-11-23 10:58:14 +00:00

566 lines
15 KiB
C
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/*
3DNOW and 3DNOWEX optimized IMDCT
Licence: GPL v2
Copyrights: Nick Kurshev
*/
#undef FFT_4_3DNOW
#undef FFT_8_3DNOW
#undef FFT_ASMB_3DNOW
#undef FFT_ASMB16_3DNOW
#undef FFT_128P_3DNOW
#ifdef HAVE_3DNOWEX
#define FFT_4_3DNOW fft_4_3dnowex
#define FFT_8_3DNOW fft_8_3dnowex
#define FFT_ASMB_3DNOW fft_asmb_3dnowex
#define FFT_ASMB16_3DNOW fft_asmb16_3dnowex
#define FFT_128P_3DNOW fft_128p_3dnowex
#else
#define FFT_4_3DNOW fft_4_3dnow
#define FFT_8_3DNOW fft_8_3dnow
#define FFT_ASMB_3DNOW fft_asmb_3dnow
#define FFT_ASMB16_3DNOW fft_asmb16_3dnow
#define FFT_128P_3DNOW fft_128p_3dnow
#endif
static void FFT_4_3DNOW(complex_t *x)
{
/* delta_p = 1 here */
/* x[k] = sum_{i=0..3} x[i] * w^{i*k}, w=e^{-2*pi/4}
*/
__asm__ __volatile__(
"movq 24(%1), %%mm3\n\t"
"movq 8(%1), %%mm1\n\t"
"pxor %2, %%mm3\n\t" /* mm3.re | -mm3.im */
"pxor %3, %%mm1\n\t" /* -mm1.re | mm1.im */
"pfadd %%mm1, %%mm3\n\t" /* vi.im = x[3].re - x[1].re; */
"movq %%mm3, %%mm4\n\t" /* vi.re =-x[3].im + x[1].im; mm4 = vi */
#ifdef HAVE_3DNOWEX
"pswapd %%mm4, %%mm4\n\t"
#else
"punpckldq %%mm4, %%mm5\n\t"
"punpckhdq %%mm5, %%mm4\n\t"
#endif
"movq (%1), %%mm5\n\t" /* yb.re = x[0].re - x[2].re; */
"movq (%1), %%mm6\n\t" /* yt.re = x[0].re + x[2].re; */
"movq 24(%1), %%mm7\n\t" /* u.re = x[3].re + x[1].re; */
"pfsub 16(%1), %%mm5\n\t" /* yb.im = x[0].im - x[2].im; mm5 = yb */
"pfadd 16(%1), %%mm6\n\t" /* yt.im = x[0].im + x[2].im; mm6 = yt */
"pfadd 8(%1), %%mm7\n\t" /* u.im = x[3].im + x[1].im; mm7 = u */
"movq %%mm6, %%mm0\n\t" /* x[0].re = yt.re + u.re; */
"movq %%mm5, %%mm1\n\t" /* x[1].re = yb.re + vi.re; */
"pfadd %%mm7, %%mm0\n\t" /*x[0].im = yt.im + u.im; */
"pfadd %%mm4, %%mm1\n\t" /* x[1].im = yb.im + vi.im; */
"movq %%mm0, (%0)\n\t"
"movq %%mm1, 8(%0)\n\t"
"pfsub %%mm7, %%mm6\n\t" /* x[2].re = yt.re - u.re; */
"pfsub %%mm4, %%mm5\n\t" /* x[3].re = yb.re - vi.re; */
"movq %%mm6, 16(%0)\n\t" /* x[2].im = yt.im - u.im; */
"movq %%mm5, 24(%0)" /* x[3].im = yb.im - vi.im; */
:"=r"(x)
:"0"(x),
"m"(x_plus_minus_3dnow),
"m"(x_minus_plus_3dnow)
:"memory");
}
static void FFT_8_3DNOW(complex_t *x)
{
/* delta_p = diag{1, sqrt(i)} here */
/* x[k] = sum_{i=0..7} x[i] * w^{i*k}, w=e^{-2*pi/8}
*/
complex_t wT1, wB1, wB2;
__asm__ __volatile__(
"movq 8(%2), %%mm0\n\t"
"movq 24(%2), %%mm1\n\t"
"movq %%mm0, %0\n\t" /* wT1 = x[1]; */
"movq %%mm1, %1\n\t" /* wB1 = x[3]; */
:"=m"(wT1), "=m"(wB1)
:"r"(x)
:"memory");
__asm__ __volatile__(
"movq 16(%0), %%mm2\n\t"
"movq 32(%0), %%mm3\n\t"
"movq %%mm2, 8(%0)\n\t" /* x[1] = x[2]; */
"movq 48(%0), %%mm4\n\t"
"movq %%mm3, 16(%0)\n\t" /* x[2] = x[4]; */
"movq %%mm4, 24(%0)\n\t" /* x[3] = x[6]; */
:"=r"(x)
:"0"(x)
:"memory");
fft_4_3dnow(&x[0]);
/* x[0] x[4] x[2] x[6] */
__asm__ __volatile__(
"movq 40(%1), %%mm0\n\t"
"movq %%mm0, %%mm3\n\t"
"movq 56(%1), %%mm1\n\t"
"pfadd %%mm1, %%mm0\n\t"
"pfsub %%mm1, %%mm3\n\t"
"movq (%2), %%mm2\n\t"
"pfadd %%mm2, %%mm0\n\t"
"pfadd %%mm2, %%mm3\n\t"
"movq (%3), %%mm1\n\t"
"pfadd %%mm1, %%mm0\n\t"
"pfsub %%mm1, %%mm3\n\t"
"movq (%1), %%mm1\n\t"
"movq 16(%1), %%mm4\n\t"
"movq %%mm1, %%mm2\n\t"
#ifdef HAVE_3DNOWEX
"pswapd %%mm3, %%mm3\n\t"
#else
"punpckldq %%mm3, %%mm6\n\t"
"punpckhdq %%mm6, %%mm3\n\t"
#endif
"pfadd %%mm0, %%mm1\n\t"
"movq %%mm4, %%mm5\n\t"
"pfsub %%mm0, %%mm2\n\t"
"pfadd %%mm3, %%mm4\n\t"
"movq %%mm1, (%0)\n\t"
"pfsub %%mm3, %%mm5\n\t"
"movq %%mm2, 32(%0)\n\t"
"movd %%mm4, 16(%0)\n\t"
"movd %%mm5, 48(%0)\n\t"
"psrlq $32, %%mm4\n\t"
"psrlq $32, %%mm5\n\t"
"movd %%mm4, 52(%0)\n\t"
"movd %%mm5, 20(%0)"
:"=r"(x)
:"0"(x), "r"(&wT1), "r"(&wB1)
:"memory");
/* x[1] x[5] */
__asm__ __volatile__ (
"movq %6, %%mm6\n\t"
"movq %5, %%mm7\n\t"
"movq %1, %%mm0\n\t"
"movq %2, %%mm1\n\t"
"movq 56(%3), %%mm3\n\t"
"pfsub 40(%3), %%mm0\n\t"
#ifdef HAVE_3DNOWEX
"pswapd %%mm1, %%mm1\n\t"
#else
"punpckldq %%mm1, %%mm2\n\t"
"punpckhdq %%mm2, %%mm1\n\t"
#endif
"pxor %%mm7, %%mm1\n\t"
"pfadd %%mm1, %%mm0\n\t"
#ifdef HAVE_3DNOWEX
"pswapd %%mm3, %%mm3\n\t"
#else
"punpckldq %%mm3, %%mm2\n\t"
"punpckhdq %%mm2, %%mm3\n\t"
#endif
"pxor %%mm6, %%mm3\n\t"
"pfadd %%mm3, %%mm0\n\t"
"movq %%mm0, %%mm1\n\t"
"pxor %%mm6, %%mm1\n\t"
"pfacc %%mm1, %%mm0\n\t"
"pfmul %4, %%mm0\n\t"
"movq 40(%3), %%mm5\n\t"
#ifdef HAVE_3DNOWEX
"pswapd %%mm5, %%mm5\n\t"
#else
"punpckldq %%mm5, %%mm1\n\t"
"punpckhdq %%mm1, %%mm5\n\t"
#endif
"movq %%mm5, %0\n\t"
"movq 8(%3), %%mm1\n\t"
"movq %%mm1, %%mm2\n\t"
"pfsub %%mm0, %%mm1\n\t"
"pfadd %%mm0, %%mm2\n\t"
"movq %%mm1, 40(%3)\n\t"
"movq %%mm2, 8(%3)\n\t"
:"=m"(wB2)
:"m"(wT1), "m"(wB1), "r"(x), "m"(HSQRT2_3DNOW),
"m"(x_plus_minus_3dnow), "m"(x_minus_plus_3dnow)
:"memory");
/* x[3] x[7] */
__asm__ __volatile__(
"movq %1, %%mm0\n\t"
#ifdef HAVE_3DNOWEX
"pswapd %3, %%mm1\n\t"
#else
"movq %3, %%mm1\n\t"
"punpckldq %%mm1, %%mm2\n\t"
"punpckhdq %%mm2, %%mm1\n\t"
#endif
"pxor %%mm6, %%mm1\n\t"
"pfadd %%mm1, %%mm0\n\t"
"movq %2, %%mm2\n\t"
"movq 56(%4), %%mm3\n\t"
"pxor %%mm7, %%mm3\n\t"
"pfadd %%mm3, %%mm2\n\t"
#ifdef HAVE_3DNOWEX
"pswapd %%mm2, %%mm2\n\t"
#else
"punpckldq %%mm2, %%mm5\n\t"
"punpckhdq %%mm5, %%mm2\n\t"
#endif
"movq 24(%4), %%mm3\n\t"
"pfsub %%mm2, %%mm0\n\t"
"movq %%mm3, %%mm4\n\t"
"movq %%mm0, %%mm1\n\t"
"pxor %%mm6, %%mm0\n\t"
"pfacc %%mm1, %%mm0\n\t"
"pfmul %5, %%mm0\n\t"
"movq %%mm0, %%mm1\n\t"
"pxor %%mm6, %%mm1\n\t"
"pxor %%mm7, %%mm0\n\t"
"pfadd %%mm1, %%mm3\n\t"
"pfadd %%mm0, %%mm4\n\t"
"movq %%mm4, 24(%0)\n\t"
"movq %%mm3, 56(%0)\n\t"
:"=r"(x)
:"m"(wT1), "m"(wB2), "m"(wB1), "0"(x), "m"(HSQRT2_3DNOW)
:"memory");
}
static void FFT_ASMB_3DNOW(int k, complex_t *x, complex_t *wTB,
const complex_t *d, const complex_t *d_3)
{
register complex_t *x2k, *x3k, *x4k, *wB;
TRANS_FILL_MM6_MM7_3DNOW();
x2k = x + 2 * k;
x3k = x2k + 2 * k;
x4k = x3k + 2 * k;
wB = wTB + 2 * k;
TRANSZERO_3DNOW(x[0],x2k[0],x3k[0],x4k[0]);
TRANS_3DNOW(x[1],x2k[1],x3k[1],x4k[1],wTB[1],wB[1],d[1],d_3[1]);
--k;
for(;;) {
TRANS_3DNOW(x[2],x2k[2],x3k[2],x4k[2],wTB[2],wB[2],d[2],d_3[2]);
TRANS_3DNOW(x[3],x2k[3],x3k[3],x4k[3],wTB[3],wB[3],d[3],d_3[3]);
if (!--k) break;
x += 2;
x2k += 2;
x3k += 2;
x4k += 2;
d += 2;
d_3 += 2;
wTB += 2;
wB += 2;
}
}
void FFT_ASMB16_3DNOW(complex_t *x, complex_t *wTB)
{
int k = 2;
TRANS_FILL_MM6_MM7_3DNOW();
/* transform x[0], x[8], x[4], x[12] */
TRANSZERO_3DNOW(x[0],x[4],x[8],x[12]);
/* transform x[1], x[9], x[5], x[13] */
TRANS_3DNOW(x[1],x[5],x[9],x[13],wTB[1],wTB[5],delta16[1],delta16_3[1]);
/* transform x[2], x[10], x[6], x[14] */
TRANSHALF_16_3DNOW(x[2],x[6],x[10],x[14]);
/* transform x[3], x[11], x[7], x[15] */
TRANS_3DNOW(x[3],x[7],x[11],x[15],wTB[3],wTB[7],delta16[3],delta16_3[3]);
}
static void FFT_128P_3DNOW(complex_t *a)
{
FFT_8_3DNOW(&a[0]); FFT_4_3DNOW(&a[8]); FFT_4_3DNOW(&a[12]);
FFT_ASMB16_3DNOW(&a[0], &a[8]);
FFT_8_3DNOW(&a[16]), FFT_8_3DNOW(&a[24]);
FFT_ASMB_3DNOW(4, &a[0], &a[16],&delta32[0], &delta32_3[0]);
FFT_8_3DNOW(&a[32]); FFT_4_3DNOW(&a[40]); FFT_4_3DNOW(&a[44]);
FFT_ASMB16_3DNOW(&a[32], &a[40]);
FFT_8_3DNOW(&a[48]); FFT_4_3DNOW(&a[56]); FFT_4_3DNOW(&a[60]);
FFT_ASMB16_3DNOW(&a[48], &a[56]);
FFT_ASMB_3DNOW(8, &a[0], &a[32],&delta64[0], &delta64_3[0]);
FFT_8_3DNOW(&a[64]); FFT_4_3DNOW(&a[72]); FFT_4_3DNOW(&a[76]);
/* FFT_16(&a[64]); */
FFT_ASMB16_3DNOW(&a[64], &a[72]);
FFT_8_3DNOW(&a[80]); FFT_8_3DNOW(&a[88]);
/* FFT_32(&a[64]); */
FFT_ASMB_3DNOW(4, &a[64], &a[80],&delta32[0], &delta32_3[0]);
FFT_8_3DNOW(&a[96]); FFT_4_3DNOW(&a[104]), FFT_4_3DNOW(&a[108]);
/* FFT_16(&a[96]); */
FFT_ASMB16_3DNOW(&a[96], &a[104]);
FFT_8_3DNOW(&a[112]), FFT_8_3DNOW(&a[120]);
/* FFT_32(&a[96]); */
FFT_ASMB_3DNOW(4, &a[96], &a[112], &delta32[0], &delta32_3[0]);
/* FFT_128(&a[0]); */
FFT_ASMB_3DNOW(16, &a[0], &a[64], &delta128[0], &delta128_3[0]);
}
static void
#ifdef HAVE_3DNOWEX
imdct_do_512_3dnowex
#else
imdct_do_512_3dnow
#endif
(sample_t data[],sample_t delay[], sample_t bias)
{
int i;
/* int k;
int p,q;
int m;
int two_m;
int two_m_plus_one;
sample_t tmp_a_i;
sample_t tmp_a_r;
sample_t tmp_b_i;
sample_t tmp_b_r;*/
sample_t *data_ptr;
sample_t *delay_ptr;
sample_t *window_ptr;
/* 512 IMDCT with source and dest data in 'data' */
/* Pre IFFT complex multiply plus IFFT cmplx conjugate & reordering*/
#if 1
__asm__ __volatile__ (
"movq %0, %%mm7\n\t"
::"m"(x_plus_minus_3dnow)
:"memory");
for( i=0; i < 128; i++) {
int j = pm128[i];
__asm__ __volatile__ (
"movd %1, %%mm0\n\t"
"movd %3, %%mm1\n\t"
"punpckldq %2, %%mm0\n\t" /* mm0 = data[256-2*j-1] | data[2*j]*/
"punpckldq %4, %%mm1\n\t" /* mm1 = xcos[j] | xsin[j] */
"movq %%mm0, %%mm2\n\t"
"pfmul %%mm1, %%mm0\n\t"
#ifdef HAVE_3DNOWEX
"pswapd %%mm1, %%mm1\n\t"
#else
"punpckldq %%mm1, %%mm5\n\t"
"punpckhdq %%mm5, %%mm1\n\t"
#endif
"pfmul %%mm1, %%mm2\n\t"
#ifdef HAVE_3DNOWEX
"pfpnacc %%mm2, %%mm0\n\t"
#else
"pxor %%mm7, %%mm0\n\t"
"pfacc %%mm2, %%mm0\n\t"
#endif
"pxor %%mm7, %%mm0\n\t"
"movq %%mm0, %0"
:"=m"(buf[i])
:"m"(data[256-2*j-1]), "m"(data[2*j]), "m"(xcos1[j]), "m"(xsin1[j])
:"memory"
);
/* buf[i].re = (data[256-2*j-1] * xcos1[j] - data[2*j] * xsin1[j]);
buf[i].im = (data[256-2*j-1] * xsin1[j] + data[2*j] * xcos1[j])*(-1.0);*/
}
#else
__asm__ __volatile__ ("femms":::"memory");
for( i=0; i < 128; i++) {
/* z[i] = (X[256-2*i-1] + j * X[2*i]) * (xcos1[i] + j * xsin1[i]) ; */
int j= pm128[i];
buf[i].real = (data[256-2*j-1] * xcos1[j]) - (data[2*j] * xsin1[j]);
buf[i].imag = -1.0 * ((data[2*j] * xcos1[j]) + (data[256-2*j-1] * xsin1[j]));
}
#endif
/* FFT Merge */
/* unoptimized variant
for (m=1; m < 7; m++) {
if(m)
two_m = (1 << m);
else
two_m = 1;
two_m_plus_one = (1 << (m+1));
for(i = 0; i < 128; i += two_m_plus_one) {
for(k = 0; k < two_m; k++) {
p = k + i;
q = p + two_m;
tmp_a_r = buf[p].real;
tmp_a_i = buf[p].imag;
tmp_b_r = buf[q].real * w[m][k].real - buf[q].imag * w[m][k].imag;
tmp_b_i = buf[q].imag * w[m][k].real + buf[q].real * w[m][k].imag;
buf[p].real = tmp_a_r + tmp_b_r;
buf[p].imag = tmp_a_i + tmp_b_i;
buf[q].real = tmp_a_r - tmp_b_r;
buf[q].imag = tmp_a_i - tmp_b_i;
}
}
}
*/
FFT_128P_3DNOW (&buf[0]);
// asm volatile ("femms \n\t":::"memory");
/* Post IFFT complex multiply plus IFFT complex conjugate*/
#if 1
__asm__ __volatile__ (
"movq %0, %%mm7\n\t"
"movq %1, %%mm6\n\t"
::"m"(x_plus_minus_3dnow),
"m"(x_minus_plus_3dnow)
:"eax","memory");
for (i=0; i < 128; i++) {
__asm__ __volatile__ (
"movq %1, %%mm0\n\t" /* ac3_buf[i].re | ac3_buf[i].im */
"movq %%mm0, %%mm1\n\t" /* ac3_buf[i].re | ac3_buf[i].im */
#ifndef HAVE_3DNOWEX
"punpckldq %%mm1, %%mm2\n\t"
"punpckhdq %%mm2, %%mm1\n\t"
#else
"pswapd %%mm1, %%mm1\n\t" /* ac3_buf[i].re | ac3_buf[i].im */
#endif
"movd %3, %%mm3\n\t" /* ac3_xsin[i] */
"punpckldq %2, %%mm3\n\t" /* ac3_xsin[i] | ac3_xcos[i] */
"pfmul %%mm3, %%mm0\n\t"
"pfmul %%mm3, %%mm1\n\t"
#ifndef HAVE_3DNOWEX
"pxor %%mm7, %%mm0\n\t"
"pfacc %%mm1, %%mm0\n\t"
"punpckldq %%mm0, %%mm1\n\t"
"punpckhdq %%mm1, %%mm0\n\t"
"movq %%mm0, %0\n\t"
#else
"pfpnacc %%mm1, %%mm0\n\t" /* mm0 = mm0[0] - mm0[1] | mm1[0] + mm1[1] */
"pswapd %%mm0, %%mm0\n\t"
"movq %%mm0, %0"
#endif
:"=m"(buf[i])
:"m"(buf[i]),"m"(xcos1[i]),"m"(xsin1[i])
:"memory");
/* ac3_buf[i].re =(tmp_a_r * ac3_xcos1[i]) + (tmp_a_i * ac3_xsin1[i]);
ac3_buf[i].im =(tmp_a_r * ac3_xsin1[i]) - (tmp_a_i * ac3_xcos1[i]);*/
}
#else
__asm__ __volatile__ ("femms":::"memory");
for( i=0; i < 128; i++) {
/* y[n] = z[n] * (xcos1[n] + j * xsin1[n]) ; */
tmp_a_r = buf[i].real;
tmp_a_i = -1.0 * buf[i].imag;
buf[i].real =(tmp_a_r * xcos1[i]) - (tmp_a_i * xsin1[i]);
buf[i].imag =(tmp_a_r * xsin1[i]) + (tmp_a_i * xcos1[i]);
}
#endif
data_ptr = data;
delay_ptr = delay;
window_ptr = imdct_window;
/* Window and convert to real valued signal */
#if 1
asm volatile (
"movd (%0), %%mm3 \n\t"
"punpckldq %%mm3, %%mm3 \n\t"
:: "r" (&bias)
);
for (i=0; i< 64; i++) {
/* merge two loops in one to enable working of 2 decoders */
__asm__ __volatile__ (
"movd 516(%1), %%mm0\n\t"
"movd (%1), %%mm1\n\t" /**data_ptr++=-buf[64+i].im**window_ptr+++*delay_ptr++;*/
"punpckldq (%2), %%mm0\n\t"/*data_ptr[128]=-buf[i].re*window_ptr[128]+delay_ptr[128];*/
"punpckldq 516(%2), %%mm1\n\t"
"pfmul (%3), %%mm0\n\t"/**data_ptr++=buf[64-i-1].re**window_ptr+++*delay_ptr++;*/
"pfmul 512(%3), %%mm1\n\t"
"pxor %%mm6, %%mm0\n\t"/*data_ptr[128]=buf[128-i-1].im*window_ptr[128]+delay_ptr[128];*/
"pxor %%mm6, %%mm1\n\t"
"pfadd (%4), %%mm0\n\t"
"pfadd 512(%4), %%mm1\n\t"
"pfadd %%mm3, %%mm0\n\t"
"pfadd %%mm3, %%mm1\n\t"
"movq %%mm0, (%0)\n\t"
"movq %%mm1, 512(%0)"
:"=r"(data_ptr)
:"r"(&buf[i].real), "r"(&buf[64-i-1].real), "r"(window_ptr), "r"(delay_ptr), "0"(data_ptr)
:"memory");
data_ptr += 2;
window_ptr += 2;
delay_ptr += 2;
}
window_ptr += 128;
#else
__asm__ __volatile__ ("femms":::"memory");
for(i=0; i< 64; i++) {
*data_ptr++ = -buf[64+i].imag * *window_ptr++ + *delay_ptr++ + bias;
*data_ptr++ = buf[64-i-1].real * *window_ptr++ + *delay_ptr++ + bias;
}
for(i=0; i< 64; i++) {
*data_ptr++ = -buf[i].real * *window_ptr++ + *delay_ptr++ + bias;
*data_ptr++ = buf[128-i-1].imag * *window_ptr++ + *delay_ptr++ + bias;
}
#endif
/* The trailing edge of the window goes into the delay line */
delay_ptr = delay;
#if 1
for(i=0; i< 64; i++) {
/* merge two loops in one to enable working of 2 decoders */
window_ptr -=2;
__asm__ __volatile__(
"movd 508(%1), %%mm0\n\t"
"movd (%1), %%mm1\n\t"
"punpckldq (%2), %%mm0\n\t"
"punpckldq 508(%2), %%mm1\n\t"
#ifdef HAVE_3DNOWEX
"pswapd (%3), %%mm3\n\t"
"pswapd -512(%3), %%mm4\n\t"
#else
"movq (%3), %%mm3\n\t"
"punpckldq %%mm3, %%mm2\n\t"
"punpckhdq %%mm2, %%mm3\n\t"
"movq -512(%3), %%mm4\n\t"
"punpckldq %%mm4, %%mm2\n\t"
"punpckhdq %%mm2, %%mm4\n\t"
#endif
"pfmul %%mm3, %%mm0\n\t"
"pfmul %%mm4, %%mm1\n\t"
"pxor %%mm6, %%mm0\n\t"
"pxor %%mm7, %%mm1\n\t"
"movq %%mm0, (%0)\n\t"
"movq %%mm1, 512(%0)"
:"=r"(delay_ptr)
:"r"(&buf[i].imag), "r"(&buf[64-i-1].imag), "r"(window_ptr), "0"(delay_ptr)
:"memory");
delay_ptr += 2;
}
__asm__ __volatile__ ("femms":::"memory");
#else
__asm__ __volatile__ ("femms":::"memory");
for(i=0; i< 64; i++) {
*delay_ptr++ = -buf[64+i].real * *--window_ptr;
*delay_ptr++ = buf[64-i-1].imag * *--window_ptr;
}
for(i=0; i<64; i++) {
*delay_ptr++ = buf[i].imag * *--window_ptr;
*delay_ptr++ = -buf[128-i-1].real * *--window_ptr;
}
#endif
}
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