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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@886 b3059339-0415-0410-9bf9-f77b7e298cf2
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nickols_k 2001-05-26 10:29:41 +00:00
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/*
* srfftp.h
*
* Copyright (C) Yuqing Deng <Yuqing_Deng@brown.edu> - April 2000
*
* 64 and 128 point split radix fft for ac3dec
*
* The algorithm is desribed in the book:
* "Computational Frameworks of the Fast Fourier Transform".
*
* The ideas and the the organization of code borrowed from djbfft written by
* D. J. Bernstein <djb@cr.py.to>. djbff can be found at
* http://cr.yp.to/djbfft.html.
*
* srfftp.h 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, or (at your option)
* any later version.
*
* srfftp.h 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 GNU Make; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Modified for using AMD's 3DNow! - 3DNowEx(DSP)! SIMD operations
* by Nick Kurshev <nickols_k@mail.ru>
*/
#ifndef SRFFTP_3DNOW_H__
#define SRFFTP_3DNOW_H__
#ifdef HAVE_3DNOWEX
#define TRANS_FILL_MM6_MM7_3DNOW()\
asm(\
"movl $-1, %%eax\n\t"\
"movd %%eax, %%mm7\n\t"\
"negl %%eax\n\t"\
"movd %%eax, %%mm6\n\t"\
"punpckldq %%mm6, %%mm7\n\t" /* -1.0 | 1.0 */\
"pi2fd %%mm7, %%mm7\n\t"\
"pswapd %%mm7, %%mm6\n\t"/* 1.0 | -1.0 */\
:::"eax","memory");
#else
#define TRANS_FILL_MM6_MM7_3DNOW()\
asm(\
"movl $-1, %%eax\n\t"\
"movd %%eax, %%mm7\n\t"\
"negl %%eax\n\t"\
"movd %%eax, %%mm6\n\t"\
"punpckldq %%mm6, %%mm7\n\t" /* -1.0 | 1.0 */\
"punpckldq %%mm7, %%mm6\n\t" /* 1.0 | -1.0 */\
"pi2fd %%mm7, %%mm7\n\t"\
"pi2fd %%mm6, %%mm6\n\t"\
:::"eax","memory");
#endif
#ifdef HAVE_3DNOWEX
#define PSWAP_MM(mm_base,mm_hlp) "pswapd "##mm_base","##mm_base" \n\t"
#else
#define PSWAP_MM(mm_base,mm_hlp)\
"movq "##mm_base","##mm_hlp" \n\t"\
"psrlq $32, "##mm_base"\n\t"\
"punpckldq "##mm_hlp","##mm_base"\n\t"
#endif
#define TRANSZERO_3DNOW(A0,A4,A8,A12) \
{ \
asm volatile("femms":::"memory");\
TRANS_FILL_MM6_MM7_3DNOW()\
asm(\
"movq %4, %%mm0\n\t" /* mm0 = wTB[0]*/\
"movq %5, %%mm1\n\t" /* mm1 = wTB[k*2]*/ \
"movq %%mm0, %%mm5\n\t"/*u.re = wTB[0].re + wTB[k*2].re;*/\
"pfadd %%mm1, %%mm5\n\t"/*u.im = wTB[0].im + wTB[k*2].im; mm5 = u*/\
"pfmul %%mm6, %%mm0\n\t"/*mm0 = wTB[0].re | -wTB[0].im */\
"pfmul %%mm7, %%mm1\n\t"/*mm1 = -wTB[k*2].re | wTB[k*2].im */\
"pfadd %%mm1, %%mm0\n\t"/*v.im = wTB[0].re - wTB[k*2].re;*/\
"movq %%mm0, %%mm4\n\t"/*v.re =-wTB[0].im + wTB[k*2].im;*/\
PSWAP_MM("%%mm4","%%mm2")/* mm4 = v*/\
"movq %6, %%mm0\n\t" /* a1 = A0;*/\
"movq %%mm0, %%mm1\n\t"\
"pfadd %%mm5, %%mm0\n\t" /*A0 = a1 + u;*/\
"pfsub %%mm5, %%mm1\n\t" /*A1 = a1 - u;*/\
"movq %%mm0, %0\n\t"\
"movq %%mm1, %1\n\t"\
"movq %7, %%mm2\n\t" /* a1 = A4;*/\
"movq %%mm2, %%mm3\n\t"\
"pfadd %%mm4, %%mm2\n\t" /*A12 = a1 + v;*/\
"pfsub %%mm4, %%mm3\n\t" /*A4 = a1 - v;*/\
"movq %%mm2, %3\n\t"\
"movq %%mm3, %2"\
:"=m"(A0), "=m"(A8), "=m"(A4), "=m"(A12)\
:"m"(wTB[0]), "m"(wTB[k*2]), "0"(A0), "2"(A4)\
:"memory");\
asm volatile("femms":::"memory");\
}
#endif