From 2921d93dac6681b16407f5d68b14df03b4dcec25 Mon Sep 17 00:00:00 2001
From: Mark Borgerding <mark@borgerding.net>
Date: Sat, 31 Jan 2004 02:47:46 +0000
Subject: [PATCH] aid in fftw benchmarks

---
 test/doit.c | 121 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 test/doit.c

diff --git a/test/doit.c b/test/doit.c
new file mode 100644
index 0000000..24068fe
--- /dev/null
+++ b/test/doit.c
@@ -0,0 +1,121 @@
+/* this program is in the public domain 
+   A program that helps the authors of the fine fftw library benchmark kiss 
+*/
+
+#include "bench-user.h"
+#include <math.h>
+
+#include "kiss_fft.h"
+#include "kiss_fftnd.h"
+#include "kiss_fftr.h"
+
+BEGIN_BENCH_DOC
+BENCH_DOC("name", "kissfft")
+BENCH_DOC("version", "1.0.1")
+BENCH_DOC("year", "2004")
+BENCH_DOC("author", "Mark Borgerding")
+BENCH_DOC("language", "C")
+BENCH_DOC("url", "http://sourceforge.net/projects/kissfft/")
+BENCH_DOC("copyright",
+"Copyright (c) 2003,4 Mark Borgerding\n"
+"\n"
+"All rights reserved.\n"
+"\n"
+"Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:\n"
+"\n"
+"    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.\n"
+"    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.\n"
+"    * Neither the author nor the names of any contributors may be used to endorse or promote products derived from this software without specific prior written permission.\n"
+"\n"
+	  "THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n")
+END_BENCH_DOC
+
+int can_do(struct problem *p)
+{
+    if (p->rank == 1) {
+        if (p->kind == PROBLEM_REAL) {
+            return (p->n[0] & 1) == 0;  /* only even real is okay */
+        } else {
+            return 1;
+        }
+    } else {
+        return p->kind == PROBLEM_COMPLEX;
+    }
+}
+
+static void *WORK=NULL;
+
+void setup(struct problem *p)
+{
+    size_t i;
+
+    /*
+    fprintf(stderr,"%s %s %d-d ",
+            (p->sign == 1)?"Inverse":"Forward",
+            p->kind == PROBLEM_COMPLEX?"Complex":"Real",
+            p->rank);
+    */
+    if (p->rank == 1) {
+        if (p->kind == PROBLEM_COMPLEX) {
+            WORK = kiss_fft_alloc (p->n[0], (p->sign == 1), 0, 0);
+        }else{
+            WORK = kiss_fftr_alloc (p->n[0], (p->sign == 1), 0, 0);
+        }
+    }else{
+        int dims[5];
+        for (i=0;i<p->rank;++i){
+            dims[i] = p->n[i];
+        }
+        /* multi-dimensional */
+        if (p->kind == PROBLEM_COMPLEX) {
+            WORK = kiss_fftnd_alloc( dims , p->rank, (p->sign == 1), 0, 0 );
+        }
+    }
+    if (WORK == NULL ){
+        fprintf(stderr,"alloc failed\n");
+        exit(1);
+    }
+
+    /*
+    for (i=0;i<p->rank;++i){
+        fprintf(stderr," d%d = %d",i,p->n[i] );
+    }
+    fprintf(stderr," allocated\n");
+    */
+}
+
+void doit(int iter, struct problem *p)
+{
+    int i;
+    void *in = p->in;
+    void *out = p->out;
+
+    if (p->in_place)
+        out = p->in;
+
+    if (p->rank == 1) {
+        if (p->kind == PROBLEM_COMPLEX){
+            for (i = 0; i < iter; ++i)
+                kiss_fft (WORK, in, out);
+        } else {
+            /* PROBLEM_REAL */
+            if (p->sign == -1)   /* FORWARD */
+                for (i = 0; i < iter; ++i)
+                    kiss_fftr (WORK, in, out);
+            else
+                for (i = 0; i < iter; ++i)
+                    kiss_fftri (WORK, in, out);
+        }
+    }else{
+        /* multi-dimensional */
+        for (i = 0; i < iter; ++i)
+            kiss_fftnd(WORK,in,out);
+    }
+}
+
+void done(struct problem *p)
+{
+     free(WORK);
+     WORK=NULL;
+     UNUSED(p);
+}