Imported Upstream version 3.2.2

[debian/gnuradio] / gnuradio-core / src / lib / filter / gr_altivec.h

diff --git a/gnuradio-core/src/lib/filter/gr_altivec.h b/gnuradio-core/src/lib/filter/gr_altivec.h
new file mode 100644 (file)
index 0000000..c0d7cfb
--- /dev/null
+++ b/gnuradio-core/src/lib/filter/gr_altivec.h
@@ -0,0 +1,75 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2008 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio 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 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef INCLUDED_GR_ALTIVEC_H
+#define INCLUDED_GR_ALTIVEC_H
+
+/*
+ * N.B., always use "vec_float4" et al. instead of "vector float" to
+ * ensure portability across the various powerpc compilers.  Some of
+ * them treat "vector" as a context specific keyword, some don't.
+ * Avoid the problem by always using the defines in vec_types.h
+ * (included below)
+ */
+
+#include <altivec.h>
+#undef bool            // repair namespace pollution
+#undef vector          // repair namespace pollution
+
+#ifdef HAVE_VEC_TYPES_H
+#include <vec_types.h>         // use system version if we've got it
+#else
+#include <gr_vec_types.h>      // fall back to our local copy
+#endif
+#undef qword           // repair namespace pollution
+
+#include <stddef.h>
+#include <stdio.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define VS             sizeof(vec_float4)
+#define FLOATS_PER_VEC (sizeof(vec_float4)/sizeof(float))
+
+union v_float_u {
+  vec_float4   v;
+  float                f[FLOATS_PER_VEC];
+};
+
+void gr_print_vector_float(FILE *fp, vec_float4 v);
+void gr_pvf(FILE *fp, const char *label, vec_float4 v);
+
+static inline float
+horizontal_add_f(vec_float4 v)
+{
+  union v_float_u u;
+  vec_float4     t0 = vec_add(v, vec_sld(v, v, 8));
+  vec_float4     t1 = vec_add(t0, vec_sld(t0, t0, 4));
+  u.v = t1;
+  return u.f[0];
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* INCLUDED_GR_ALTIVEC_H */