[Ffmpeg-devel] [PATCH] 3DNow! version of FFT
Zuxy Meng
zuxy.meng
Tue Mar 7 03:06:19 CET 2006
Hi,
Attached are the 3DNow! & Extended 3DNow! versions of FFT, as a
replacement for ff_fft_calc_sse on K6/7 CPUs.
Like fft_sse.c, they are written in instrinsics and require mm3dnow.h.
Proper configure script diff detecting this header is also included.
--
Zuxy
Beauty is truth,
While truth is beauty.
PGP KeyID: E8555ED6
-------------- next part --------------
--- ffmpeg/configure 2006-02-14 06:50:00.000000000 +0800
+++ ffmpeg.new/configure 2006-03-07 08:28:33.000000000 +0800
@@ -1110,6 +1110,19 @@ if $cc -msse -o $TMPO $TMPC 2> /dev/null
builtin_vector=yes
fi
+# test for mm3dnow.h
+cat > $TMPC << EOF
+#include <mm3dnow.h>
+int main(void) {
+return 0;
+}
+EOF
+
+mm3dnow=no
+if $cc -march=athlon -o $TMPO $TMPC 2> /dev/null ; then
+ mm3dnow=yes
+fi
+
# Probe for -Wdeclaration-after-statement
if test "$cc" = "gcc"; then
cat > $TMPC << EOF
@@ -1328,6 +1341,7 @@ echo "broken inttypes.h $emu_fast_int"
if test $cpu = "x86" -o $cpu = "x86_64"; then
echo "MMX enabled $mmx"
echo "Vector Builtins $builtin_vector"
+echo "3DNow! Builtins $mm3dnow"
fi
if test $cpu = "armv4l"; then
echo "IWMMXT enabled $iwmmxt"
@@ -1508,6 +1522,10 @@ if test "$builtin_vector" = "yes" ; then
echo "TARGET_BUILTIN_VECTOR=yes" >> config.mak
echo "#define HAVE_BUILTIN_VECTOR 1" >> $TMPH
fi
+if test "$mm3dnow" = "yes" ; then
+ echo "TARGET_BUILTIN_3DNOW=yes" >> config.mak
+ echo "#define HAVE_MM3DNOW 1" >> $TMPH
+fi
if test "$iwmmxt" = "yes" ; then
echo "TARGET_IWMMXT=yes" >> config.mak
echo "#define HAVE_IWMMXT 1" >> $TMPH
--- ffmpeg/libavcodec/Makefile 2006-02-17 11:17:42.000000000 +0800
+++ ffmpeg.new/libavcodec/Makefile 2006-03-07 08:31:56.000000000 +0800
@@ -330,7 +330,7 @@ OBJS += i386/fdct_mmx.o i386/cputest.o \
i386/dsputil_mmx.o i386/mpegvideo_mmx.o \
i386/idct_mmx.o i386/motion_est_mmx.o \
i386/simple_idct_mmx.o i386/fft_sse.o i386/vp3dsp_mmx.o \
- i386/vp3dsp_sse2.o
+ i386/vp3dsp_sse2.o i386/fft_3dn.o i386/fft_3dn2.o
ifeq ($(CONFIG_GPL),yes)
OBJS += i386/idct_mmx_xvid.o
endif
@@ -338,6 +338,10 @@ ifdef TARGET_BUILTIN_VECTOR
i386/fft_sse.o: CFLAGS+= -msse
depend: CFLAGS+= -msse
endif
+ifdef TARGET_BUILTIN_3DNOW
+i386/fft_3dn.o: CFLAGS+= -m3dnow
+i386/fft_3dn2.o: CFLAGS+= -march=athlon
+endif
endif
# armv4l specific stuff
--- ffmpeg/libavcodec/dsputil.h 2006-02-10 14:55:24.000000000 +0800
+++ ffmpeg.new/libavcodec/dsputil.h 2006-03-07 08:39:17.000000000 +0800
@@ -564,6 +564,8 @@ int ff_fft_init(FFTContext *s, int nbits
void ff_fft_permute(FFTContext *s, FFTComplex *z);
void ff_fft_calc_c(FFTContext *s, FFTComplex *z);
void ff_fft_calc_sse(FFTContext *s, FFTComplex *z);
+void ff_fft_calc_3dn(FFTContext *s, FFTComplex *z);
+void ff_fft_calc_3dn2(FFTContext *s, FFTComplex *z);
void ff_fft_calc_altivec(FFTContext *s, FFTComplex *z);
static inline void ff_fft_calc(FFTContext *s, FFTComplex *z)
--- ffmpeg/libavcodec/fft.c 2006-01-13 06:43:15.000000000 +0800
+++ ffmpeg.new/libavcodec/fft.c 2006-03-07 08:37:43.000000000 +0800
@@ -57,12 +57,12 @@ int ff_fft_init(FFTContext *s, int nbits
s->exptab1 = NULL;
/* compute constant table for HAVE_SSE version */
-#if (defined(HAVE_MMX) && defined(HAVE_BUILTIN_VECTOR)) || defined(HAVE_ALTIVEC)
+#if (defined(HAVE_MMX) && (defined(HAVE_BUILTIN_VECTOR) || defined(HAVE_MM3DNOW))) || defined(HAVE_ALTIVEC)
{
int has_vectors = 0;
#if defined(HAVE_MMX)
- has_vectors = mm_support() & MM_SSE;
+ has_vectors = mm_support() & (MM_3DNOW | MM_3DNOWEXT | MM_SSE | MM_SSE2);
#endif
#if defined(HAVE_ALTIVEC) && !defined(ALTIVEC_USE_REFERENCE_C_CODE)
has_vectors = mm_support() & MM_ALTIVEC;
@@ -94,8 +94,24 @@ int ff_fft_init(FFTContext *s, int nbits
} while (nblocks != 0);
av_freep(&s->exptab);
#if defined(HAVE_MMX)
- s->fft_calc = ff_fft_calc_sse;
-#else
+#ifdef HAVE_MM3DNOW
+ if (has_vectors & MM_3DNOWEXT)
+ /* 3DNowEx for Athlon(XP) */
+ s->fft_calc = ff_fft_calc_3dn2;
+ else if (has_vectors & MM_3DNOW)
+ /* 3DNow! for K6-2/3 */
+ s->fft_calc = ff_fft_calc_3dn;
+#endif
+#ifdef HAVE_BUILTIN_VECTOR
+ if (has_vectors & MM_SSE2)
+ /* SSE for P4/K8 */
+ s->fft_calc = ff_fft_calc_sse;
+ else if ((has_vectors & MM_SSE) &&
+ s->fft_calc == ff_fft_calc_c)
+ /* SSE for P3 */
+ s->fft_calc = ff_fft_calc_sse;
+#endif
+#else /* HAVE_MMX */
s->fft_calc = ff_fft_calc_altivec;
#endif
}
--- ffmpeg/libavcodec/i386/fft_3dn.c 1970-01-01 08:00:00.000000000 +0800
+++ ffmpeg.new/libavcodec/i386/fft_3dn.c 2006-03-07 08:29:13.000000000 +0800
@@ -0,0 +1,138 @@
+/*
+ * FFT/MDCT transform with 3DNow! optimizations
+ * Copyright (c) 2002 Fabrice Bellard.
+ * Copyright (c) 2006 Zuxy MENG Jie.
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include "../dsputil.h"
+#include <math.h>
+
+#ifdef HAVE_MM3DNOW
+
+#include <mm3dnow.h>
+
+static const int p1m1[2] __attribute__((aligned(8))) =
+ { 0, 1 << 31 };
+
+static const int m1p1[2] __attribute__((aligned(8))) =
+ { 1 << 31, 0 };
+
+void ff_fft_calc_3dn(FFTContext *s, FFTComplex *z)
+{
+ int ln = s->nbits;
+ int j, np, np2;
+ int nblocks, nloops;
+ register FFTComplex *p, *q;
+ FFTComplex *cptr, *cptr1;
+ int k;
+
+ np = 1 << ln;
+ /* FEMMS not a must here but recommended by AMD */
+ _m_femms();
+
+ {
+ __m64 *r, a0, a1, b0, b1, tmp, c;
+
+ r = (__m64 *)&z[0];
+ if (s->inverse) {
+ c = *(__m64 *)m1p1;
+ }
+ else {
+ c = *(__m64 *)p1m1;
+ }
+
+ j = (np >> 2);
+ do {
+ /* do the pass 0 butterfly */
+ a0 = _m_pfadd(r[0], r[1]);
+ a1 = _m_pfsub(r[0], r[1]);
+
+ /* do the pass 0 butterfly */
+ b0 = _m_pfadd(r[2], r[3]);
+ b1 = _m_pfsub(r[2], r[3]);
+
+ /* multiply third by -i */
+ tmp = _m_punpckhdq(b1, b1);
+ b1 = _m_punpckldq(b1, b1);
+ b1 = _m_punpckldq(tmp, b1);
+ b1 = _m_pxor(b1, c);
+
+ /* do the pass 1 butterfly */
+ r[0] = _m_pfadd(a0, b0);
+ r[1] = _m_pfadd(a1, b1);
+ r[2] = _m_pfsub(a0, b0);
+ r[3] = _m_pfsub(a1, b1);
+ r += 4;
+ } while (--j != 0);
+ }
+ /* pass 2 .. ln-1 */
+
+ nblocks = np >> 3;
+ nloops = 1 << 2;
+ np2 = np >> 1;
+
+ cptr1 = s->exptab1;
+ do {
+ p = z;
+ q = z + nloops;
+ j = nblocks;
+ do {
+ cptr = cptr1;
+ k = nloops >> 1;
+ do {
+ __m64 a0, a1, b0, b1, c0, c1, t10, t11, t20, t21;
+
+ a0 = *(__m64 *)&p[0];
+ a1 = *(__m64 *)&p[1];
+ b0 = *(__m64 *)&q[0];
+ b1 = *(__m64 *)&q[1];
+
+ /* complex mul */
+ c0 = *(__m64 *)&cptr[0];
+ c1 = *(__m64 *)&cptr[1];
+ /* cre*re cim*re */
+ t10 = _m_pfmul(c0, _m_punpckldq(b0, b0));
+ t11 = _m_pfmul(c1, _m_punpckldq(b1, b1));
+ c0 = *(__m64 *)&cptr[2];
+ c1 = *(__m64 *)&cptr[3];
+ /* -cim*im cre*im */
+ t20 = _m_pfmul(c0, _m_punpckhdq(b0, b0));
+ t21 = _m_pfmul(c1, _m_punpckhdq(b1, b1));
+ b0 = _m_pfadd(t10, t20);
+ b1 = _m_pfadd(t11, t21);
+
+ /* butterfly */
+ *(__m64 *)&p[0] = _m_pfadd(a0, b0);
+ *(__m64 *)&p[1] = _m_pfadd(a1, b1);
+ *(__m64 *)&q[0] = _m_pfsub(a0, b0);
+ *(__m64 *)&q[1] = _m_pfsub(a1, b1);
+
+ p += 2;
+ q += 2;
+ cptr += 4;
+ } while (--k);
+
+ p += nloops;
+ q += nloops;
+ } while (--j);
+ cptr1 += nloops * 2;
+ nblocks = nblocks >> 1;
+ nloops = nloops << 1;
+ } while (nblocks != 0);
+ _m_femms();
+}
+
+#endif
--- ffmpeg/libavcodec/i386/fft_3dn2.c 1970-01-01 08:00:00.000000000 +0800
+++ ffmpeg.new/libavcodec/i386/fft_3dn2.c 2006-03-07 08:29:13.000000000 +0800
@@ -0,0 +1,138 @@
+/*
+ * FFT/MDCT transform with Extended 3DNow! optimizations
+ * Copyright (c) 2002 Fabrice Bellard.
+ * Copyright (c) 2006 Zuxy MENG Jie.
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include "../dsputil.h"
+#include <math.h>
+
+#ifdef HAVE_MM3DNOW
+
+#include <mm3dnow.h>
+
+static const int p1m1[2] __attribute__((aligned(8))) =
+ { 0, 1 << 31 };
+
+static const int m1p1[2] __attribute__((aligned(8))) =
+ { 1 << 31, 0 };
+
+void ff_fft_calc_3dn2(FFTContext *s, FFTComplex *z)
+{
+ int ln = s->nbits;
+ int j, np, np2;
+ int nblocks, nloops;
+ register FFTComplex *p, *q;
+ FFTComplex *cptr, *cptr1;
+ int k;
+
+ np = 1 << ln;
+ /* FEMMS is not a must here but recommended by AMD */
+ _m_femms();
+
+ {
+ __m64 *r, a0, a1, b0, b1, c;
+
+ r = (__m64 *)&z[0];
+ if (s->inverse) {
+ c = *(__m64 *)m1p1;
+ }
+ else {
+ c = *(__m64 *)p1m1;
+ }
+
+ j = (np >> 2);
+ do {
+ /* do the pass 0 butterfly */
+ a0 = _m_pfadd(r[0], r[1]);
+ a1 = _m_pfsub(r[0], r[1]);
+
+ /* do the pass 0 butterfly */
+ b0 = _m_pfadd(r[2], r[3]);
+ b1 = _m_pfsub(r[2], r[3]);
+
+ /* multiply third by -i */
+ b1 = _m_pswapd(b1);
+ b1 = _m_pxor(b1, c);
+
+ r[0] = _m_pfadd(a0, b0);
+ r[1] = _m_pfadd(a1, b1);
+ r[2] = _m_pfsub(a0, b0);
+ r[3] = _m_pfsub(a1, b1);
+ r += 4;
+ } while (--j != 0);
+ }
+ /* pass 2 .. ln-1 */
+
+ nblocks = np >> 3;
+ nloops = 1 << 2;
+ np2 = np >> 1;
+
+ cptr1 = s->exptab1;
+ do {
+ p = z;
+ q = z + nloops;
+ j = nblocks;
+ do {
+ cptr = cptr1;
+ k = nloops >> 1;
+ do {
+ __m64 a0, a1, b0, b1, c0, c1, t10, t11, t20, t21;
+
+ a0 = *(__m64 *)&p[0];
+ a1 = *(__m64 *)&p[1];
+ b0 = *(__m64 *)&q[0];
+ b1 = *(__m64 *)&q[1];
+
+ /* complex mul */
+ c0 = *(__m64 *)&cptr[0];
+ c1 = *(__m64 *)&cptr[1];
+ /* cre*re cim*im */
+ t10 = _m_pfmul(c0, b0);
+ t11 = _m_pfmul(c1, b1);
+ /* no need to access cptr[2] & cptr[3] */
+ c0 = _m_pswapd(c0);
+ c1 = _m_pswapd(c1);
+ /* cim*re cre*im */
+ t20 = _m_pfmul(c0, b0);
+ t21 = _m_pfmul(c1, b1);
+
+ /* cre*re-cim*im cim*re+cre*im */
+ b0 = _m_pfpnacc(t10, t20);
+ b1 = _m_pfpnacc(t11, t21);
+
+ /* butterfly */
+ *(__m64 *)&p[0] = _m_pfadd(a0, b0);
+ *(__m64 *)&p[1] = _m_pfadd(a1, b1);
+ *(__m64 *)&q[0] = _m_pfsub(a0, b0);
+ *(__m64 *)&q[1] = _m_pfsub(a1, b1);
+
+ p += 2;
+ q += 2;
+ cptr += 4;
+ } while (--k);
+
+ p += nloops;
+ q += nloops;
+ } while (--j);
+ cptr1 += nloops * 2;
+ nblocks = nblocks >> 1;
+ nloops = nloops << 1;
+ } while (nblocks != 0);
+ _m_femms();
+}
+
+#endif
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