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-rw-r--r--attic/muse2-oom/muse2/al/dspXMM.cpp119
1 files changed, 119 insertions, 0 deletions
diff --git a/attic/muse2-oom/muse2/al/dspXMM.cpp b/attic/muse2-oom/muse2/al/dspXMM.cpp
new file mode 100644
index 00000000..99893c3f
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+++ b/attic/muse2-oom/muse2/al/dspXMM.cpp
@@ -0,0 +1,119 @@
+//=========================================================
+// MusE
+// Linux Music Editor
+// $Id: dspXMM.cpp,v 1.1.2.2 2009/12/20 00:04:25 spamatica Exp $
+//
+// (C) Copyright 2007-2009 Werner Schweer (ws@seh.de)
+// file originally from Ardour DAW project by Paul Davis (c) 2007
+// licensed through GPL
+// Original author Sampo Savolainen
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2.
+//
+// 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+//======================================================================
+
+
+#include <xmmintrin.h>
+
+void
+x86_sse_find_peaks(float *buf, unsigned nframes, float *min, float *max)
+{
+ __m128 current_max, current_min, work;
+
+ // Load max and min values into all four slots of the XMM registers
+ current_min = _mm_set1_ps(*min);
+ current_max = _mm_set1_ps(*max);
+
+ // Work input until "buf" reaches 16 byte alignment
+ while ( ((unsigned long)buf) % 16 != 0 && nframes > 0) {
+
+ // Load the next float into the work buffer
+ work = _mm_set1_ps(*buf);
+
+ current_min = _mm_min_ps(current_min, work);
+ current_max = _mm_max_ps(current_max, work);
+
+ buf++;
+ nframes--;
+ }
+
+ // use 64 byte prefetch for quadruple quads
+ while (nframes >= 16) {
+ __builtin_prefetch(buf+64,0,0);
+
+ work = _mm_load_ps(buf);
+ current_min = _mm_min_ps(current_min, work);
+ current_max = _mm_max_ps(current_max, work);
+ buf+=4;
+ work = _mm_load_ps(buf);
+ current_min = _mm_min_ps(current_min, work);
+ current_max = _mm_max_ps(current_max, work);
+ buf+=4;
+ work = _mm_load_ps(buf);
+ current_min = _mm_min_ps(current_min, work);
+ current_max = _mm_max_ps(current_max, work);
+ buf+=4;
+ work = _mm_load_ps(buf);
+ current_min = _mm_min_ps(current_min, work);
+ current_max = _mm_max_ps(current_max, work);
+ buf+=4;
+ nframes-=16;
+ }
+
+ // work through aligned buffers
+ while (nframes >= 4) {
+
+ work = _mm_load_ps(buf);
+
+ current_min = _mm_min_ps(current_min, work);
+ current_max = _mm_max_ps(current_max, work);
+
+ buf+=4;
+ nframes-=4;
+ }
+
+ // work through the rest < 4 samples
+ while ( nframes > 0) {
+
+ // Load the next float into the work buffer
+ work = _mm_set1_ps(*buf);
+
+ current_min = _mm_min_ps(current_min, work);
+ current_max = _mm_max_ps(current_max, work);
+
+ buf++;
+ nframes--;
+ }
+
+ // Find min & max value in current_max through shuffle tricks
+
+ work = current_min;
+ work = _mm_shuffle_ps(work, work, _MM_SHUFFLE(2, 3, 0, 1));
+ work = _mm_min_ps (work, current_min);
+ current_min = work;
+ work = _mm_shuffle_ps(work, work, _MM_SHUFFLE(1, 0, 3, 2));
+ work = _mm_min_ps (work, current_min);
+
+ _mm_store_ss(min, work);
+
+ work = current_max;
+ work = _mm_shuffle_ps(work, work, _MM_SHUFFLE(2, 3, 0, 1));
+ work = _mm_max_ps (work, current_max);
+ current_max = work;
+ work = _mm_shuffle_ps(work, work, _MM_SHUFFLE(1, 0, 3, 2));
+ work = _mm_max_ps (work, current_max);
+
+ _mm_store_ss(max, work);
+}
+
+
+