diff src/fftw-3.3.5/kernel/cpy2d.c @ 127:7867fa7e1b6b

Current fftw source

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/fftw-3.3.5/kernel/cpy2d.c	Tue Oct 18 13:40:26 2016 +0100
@@ -0,0 +1,207 @@
+/*
+ * Copyright (c) 2003, 2007-14 Matteo Frigo
+ * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
+ *
+ * This program 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 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+/* out of place 2D copy routines */
+#include "ifftw.h"
+
+#if defined(__x86_64__) || defined(_M_X64) || defined(_M_AMD64)
+#  ifdef HAVE_XMMINTRIN_H
+#    include <xmmintrin.h>
+#    define WIDE_TYPE __m128
+#  endif
+#endif
+
+#ifndef WIDE_TYPE
+/* fall back to double, which means that WIDE_TYPE will be unused */
+#  define WIDE_TYPE double
+#endif
+
+void X(cpy2d)(R *I, R *O,
+	      INT n0, INT is0, INT os0,
+	      INT n1, INT is1, INT os1,
+	      INT vl)
+{
+     INT i0, i1, v;
+
+     switch (vl) {
+	 case 1:
+	      for (i1 = 0; i1 < n1; ++i1)
+		   for (i0 = 0; i0 < n0; ++i0) {
+			R x0 = I[i0 * is0 + i1 * is1];
+			O[i0 * os0 + i1 * os1] = x0;
+		   }
+	      break;
+	 case 2:
+	      if (1
+		  && (2 * sizeof(R) == sizeof(WIDE_TYPE))
+		  && (sizeof(WIDE_TYPE) > sizeof(double))
+		  && (((size_t)I) % sizeof(WIDE_TYPE) == 0)
+		  && (((size_t)O) % sizeof(WIDE_TYPE) == 0)
+		  && ((is0 & 1) == 0)
+		  && ((is1 & 1) == 0)
+		  && ((os0 & 1) == 0)
+		  && ((os1 & 1) == 0)) {
+		   /* copy R[2] as WIDE_TYPE if WIDE_TYPE is large
+		      enough to hold R[2], and if the input is
+		      properly aligned.  This is a win when R==double
+		      and WIDE_TYPE is 128 bits. */
+		   for (i1 = 0; i1 < n1; ++i1)
+			for (i0 = 0; i0 < n0; ++i0) {
+			     *(WIDE_TYPE *)&O[i0 * os0 + i1 * os1] =
+				  *(WIDE_TYPE *)&I[i0 * is0 + i1 * is1];
+			}
+	      } else if (1
+		  && (2 * sizeof(R) == sizeof(double))
+		  && (((size_t)I) % sizeof(double) == 0)
+		  && (((size_t)O) % sizeof(double) == 0)
+		  && ((is0 & 1) == 0)
+		  && ((is1 & 1) == 0)
+		  && ((os0 & 1) == 0)
+		  && ((os1 & 1) == 0)) {
+		   /* copy R[2] as double if double is large enough to
+		      hold R[2], and if the input is properly aligned.
+		      This case applies when R==float */
+		   for (i1 = 0; i1 < n1; ++i1)
+			for (i0 = 0; i0 < n0; ++i0) {
+			     *(double *)&O[i0 * os0 + i1 * os1] =
+				  *(double *)&I[i0 * is0 + i1 * is1];
+			}
+	      } else {
+		   for (i1 = 0; i1 < n1; ++i1)
+			for (i0 = 0; i0 < n0; ++i0) {
+			     R x0 = I[i0 * is0 + i1 * is1];
+			     R x1 = I[i0 * is0 + i1 * is1 + 1];
+			     O[i0 * os0 + i1 * os1] = x0;
+ 			     O[i0 * os0 + i1 * os1 + 1] = x1;
+			}
+	      }
+	      break;
+	 default:
+	      for (i1 = 0; i1 < n1; ++i1)
+		   for (i0 = 0; i0 < n0; ++i0)
+			for (v = 0; v < vl; ++v) {
+			     R x0 = I[i0 * is0 + i1 * is1 + v];
+			     O[i0 * os0 + i1 * os1 + v] = x0;
+			}
+	      break;
+     }
+}
+
+/* like cpy2d, but read input contiguously if possible */
+void X(cpy2d_ci)(R *I, R *O,
+		 INT n0, INT is0, INT os0,
+		 INT n1, INT is1, INT os1,
+		 INT vl)
+{
+     if (IABS(is0) < IABS(is1))	/* inner loop is for n0 */
+	  X(cpy2d) (I, O, n0, is0, os0, n1, is1, os1, vl);
+     else
+	  X(cpy2d) (I, O, n1, is1, os1, n0, is0, os0, vl);
+}
+
+/* like cpy2d, but write output contiguously if possible */
+void X(cpy2d_co)(R *I, R *O,
+		 INT n0, INT is0, INT os0,
+		 INT n1, INT is1, INT os1,
+		 INT vl)
+{
+     if (IABS(os0) < IABS(os1))	/* inner loop is for n0 */
+	  X(cpy2d) (I, O, n0, is0, os0, n1, is1, os1, vl);
+     else
+	  X(cpy2d) (I, O, n1, is1, os1, n0, is0, os0, vl);
+}
+
+
+/* tiled copy routines */
+struct cpy2d_closure {
+     R *I, *O;
+     INT is0, os0, is1, os1, vl;
+     R *buf;
+};
+
+static void dotile(INT n0l, INT n0u, INT n1l, INT n1u, void *args)
+{
+     struct cpy2d_closure *k = (struct cpy2d_closure *)args;
+     X(cpy2d)(k->I + n0l * k->is0 + n1l * k->is1,
+	      k->O + n0l * k->os0 + n1l * k->os1,
+	      n0u - n0l, k->is0, k->os0,
+	      n1u - n1l, k->is1, k->os1,
+	      k->vl);
+}
+
+static void dotile_buf(INT n0l, INT n0u, INT n1l, INT n1u, void *args)
+{
+     struct cpy2d_closure *k = (struct cpy2d_closure *)args;
+
+     /* copy from I to buf */
+     X(cpy2d_ci)(k->I + n0l * k->is0 + n1l * k->is1,
+		 k->buf,
+		 n0u - n0l, k->is0, k->vl,
+		 n1u - n1l, k->is1, k->vl * (n0u - n0l),
+		 k->vl);
+
+     /* copy from buf to O */
+     X(cpy2d_co)(k->buf,
+		 k->O + n0l * k->os0 + n1l * k->os1,
+		 n0u - n0l, k->vl, k->os0,
+		 n1u - n1l, k->vl * (n0u - n0l), k->os1,
+		 k->vl);
+}
+
+
+void X(cpy2d_tiled)(R *I, R *O,
+		    INT n0, INT is0, INT os0,
+		    INT n1, INT is1, INT os1, INT vl)
+{
+     INT tilesz = X(compute_tilesz)(vl,
+				    1 /* input array */
+				    + 1 /* ouput array */);
+     struct cpy2d_closure k;
+     k.I = I;
+     k.O = O;
+     k.is0 = is0;
+     k.os0 = os0;
+     k.is1 = is1;
+     k.os1 = os1;
+     k.vl = vl;
+     k.buf = 0; /* unused */
+     X(tile2d)(0, n0, 0, n1, tilesz, dotile, &k);
+}
+
+void X(cpy2d_tiledbuf)(R *I, R *O,
+		       INT n0, INT is0, INT os0,
+		       INT n1, INT is1, INT os1, INT vl)
+{
+     R buf[CACHESIZE / (2 * sizeof(R))];
+     /* input and buffer in cache, or
+	output and buffer in cache */
+     INT tilesz = X(compute_tilesz)(vl, 2);
+     struct cpy2d_closure k;
+     k.I = I;
+     k.O = O;
+     k.is0 = is0;
+     k.os0 = os0;
+     k.is1 = is1;
+     k.os1 = os1;
+     k.vl = vl;
+     k.buf = buf;
+     A(tilesz * tilesz * vl * sizeof(R) <= sizeof(buf));
+     X(tile2d)(0, n0, 0, n1, tilesz, dotile_buf, &k);
+}