Initial checkin for VOLK - Vector-Optimized Library of Kernels. This is a new SIMD library.

It currently stands by itself under the GNU Radio tree and can be used separately. We will integrate the build process into GNU Raio and start building off of its functionality over time.

1 files changed, 59 insertions, 0 deletions

diff --git a/volk/lib/qa_32f_sqrt_aligned16.cc b/volk/lib/qa_32f_sqrt_aligned16.cc
new file mode 100644
index 000000000..a3e6abc18
--- /dev/null
+++ b/volk/lib/qa_32f_sqrt_aligned16.cc
@@ -0,0 +1,59 @@
+#include <volk/volk.h>
+#include <qa_32f_sqrt_aligned16.h>
+#include <volk/volk_32f_sqrt_aligned16.h>
+#include <cstdlib>
+
+//test for sse
+
+#ifndef LV_HAVE_SSE
+
+void qa_32f_sqrt_aligned16::t1() {
+  printf("sse not available... no test performed\n");
+}
+
+#else
+
+void qa_32f_sqrt_aligned16::t1() {
+  
+  volk_environment_init();
+  clock_t start, end;
+  double total;
+  const int vlen = 3201;
+  const int ITERS = 100000;
+  float input0[vlen] __attribute__ ((aligned (16)));
+  
+  float output0[vlen] __attribute__ ((aligned (16)));
+  float output01[vlen] __attribute__ ((aligned (16)));
+
+  // No reason to test negative numbers because they result in NaN.
+  for(int i = 0; i < vlen; ++i) {   
+    input0[i] = ((float) (rand()) / static_cast<float>(RAND_MAX));
+  }
+  printf("32f_sqrt_aligned\n");
+
+  start = clock();
+  for(int count = 0; count < ITERS; ++count) {
+    volk_32f_sqrt_aligned16_manual(output0, input0, vlen, "generic");
+  }
+  end = clock();
+  total = (double)(end-start)/(double)CLOCKS_PER_SEC;
+  printf("generic_time: %f\n", total);
+  start = clock();
+  for(int count = 0; count < ITERS; ++count) {
+    volk_32f_sqrt_aligned16_manual(output01, input0, vlen, "sse");
+  }
+  end = clock();
+  total = (double)(end-start)/(double)CLOCKS_PER_SEC;
+  printf("sse_time: %f\n", total);
+  for(int i = 0; i < 1; ++i) {
+    //printf("inputs: %d, %d\n", input0[i*2], input0[i*2 + 1]);
+    //printf("generic... %d, ssse3... %d\n", output0[i], output1[i]);
+  }
+  
+  for(int i = 0; i < vlen; ++i) {
+    //printf("%d...%d\n", output0[i], output01[i]);
+    CPPUNIT_ASSERT_DOUBLES_EQUAL(output0[i], output01[i], fabs(output0[i])*1e-4);
+  }
+}
+
+#endif