Windows implementation WIP

3rdparty/ffts/ffts-master/src/ffts_static.c

@@ -0,0 +1,102 @@
+/*
+ 
+ This file is part of FFTS -- The Fastest Fourier Transform in the South
+  
+ Copyright (c) 2012, Anthony M. Blake <amb@anthonix.com>
+ Copyright (c) 2012, The University of Waikato 
+ 
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+ 	* Redistributions of source code must retain the above copyright
+ 		notice, this list of conditions and the following disclaimer.
+ 	* 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.
+ 	* Neither the name of the organization nor the
+	  names of its contributors may be used to endorse or promote products
+ 		derived from this software without specific prior written permission.
+
+ 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 ANTHONY M. BLAKE 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.
+
+*/
+#include "ffts_static.h"
+
+void ffts_static_rec_i(ffts_plan_t *p, float *data, size_t N) {
+	if(N > 16) {
+		size_t N1 = N >> 1;
+		size_t N2 = N >> 2;
+		size_t N3 = N >> 3;
+		float *ws = ((float *)(p->ws)) + (p->ws_is[__builtin_ctzl(N)-4] << 1);
+
+		ffts_static_rec_i(p, data, N2);
+		ffts_static_rec_i(p, data + N1, N3);
+		ffts_static_rec_i(p, data + N1 + N2, N3);
+		ffts_static_rec_i(p, data + N, N2);
+		ffts_static_rec_i(p, data + N + N1, N2);
+
+  	if(N == p->N) {
+  		neon_static_x8_t_i(data, N, ws);
+  	}else{
+  		neon_static_x8_i(data, N, ws); 
+  	}
+
+	}else if(N==16){
+	  neon_static_x4_i(data, N, p->ws);
+	}
+
+}
+void ffts_static_rec_f(ffts_plan_t *p, float *data, size_t N) {
+	if(N > 16) {
+		size_t N1 = N >> 1;
+		size_t N2 = N >> 2;
+		size_t N3 = N >> 3;
+		float *ws = ((float *)(p->ws)) + (p->ws_is[__builtin_ctzl(N)-4] << 1);
+
+		ffts_static_rec_f(p, data, N2);
+		ffts_static_rec_f(p, data + N1, N3);
+		ffts_static_rec_f(p, data + N1 + N2, N3);
+		ffts_static_rec_f(p, data + N, N2);
+		ffts_static_rec_f(p, data + N + N1, N2);
+
+  	if(N == p->N) {
+  		neon_static_x8_t_f(data, N, ws);
+  	}else{
+  		neon_static_x8_f(data, N, ws); 
+  	}
+
+	}else if(N==16){
+	  neon_static_x4_f(data, N, p->ws);
+	}
+
+}
+
+void ffts_static_transform_f(ffts_plan_t *p, const void *in, void *out) {
+
+	if(__builtin_ctzl(p->N) & 1) 
+		neon_static_o_f(p, in, out);
+	else 
+		neon_static_e_f(p, in, out);
+	ffts_static_rec_f(p, out, p->N);
+}
+
+
+void ffts_static_transform_i(ffts_plan_t *p, const void *in, void *out) {
+
+	if(__builtin_ctzl(p->N) & 1) 
+		neon_static_o_i(p, in, out);
+	else 
+		neon_static_e_i(p, in, out);
+	ffts_static_rec_i(p, out, p->N);
+}
+// vim: set autoindent noexpandtab tabstop=3 shiftwidth=3: