diff options
Diffstat (limited to 'libstdc++-v3/testsuite/performance/complex_norm.cc')
| -rw-r--r-- | libstdc++-v3/testsuite/performance/complex_norm.cc | 34 |
1 files changed, 29 insertions, 5 deletions
diff --git a/libstdc++-v3/testsuite/performance/complex_norm.cc b/libstdc++-v3/testsuite/performance/complex_norm.cc index 4a4277634cd..952e727ba56 100644 --- a/libstdc++-v3/testsuite/performance/complex_norm.cc +++ b/libstdc++-v3/testsuite/performance/complex_norm.cc @@ -26,34 +26,58 @@ // the GNU General Public License. #include <complex> +#include <testsuite_performance.h> // based on libstdc++/5730, use --fast-math int main() { - typedef std::complex<double> complex_type; + using namespace std; + using namespace __gnu_cxx_test; + + time_counter time; + resource_counter resource; + const int iterations = 2000; + + typedef complex<double> complex_type; complex_type u[2048]; for (int i = 0; i < 2048; ++i) u[i] = 1.0; - for (int i = 0; i < 2000; ++i) + start_counters(time, resource); + for (int i = 0; i < iterations; ++i) { complex_type * p = u; for (int j = 0; j < 2048; ++j) { -#if 1 double u2 = norm(*p); -#else + double t = u2 * 0.1; + *p *= complex_type(cos(t), sin(t)); + ++p; + } + } + stop_counters(time, resource); + report_performance(__FILE__, "norm", time, resource); + clear_counters(time, resource); + + start_counters(time, resource); + for (int i = 0; i < iterations; ++i) + { + complex_type * p = u; + for (int j = 0; j < 2048; ++j) + { // Shouldn't be slower than the above. double ur = real(*p); double ui = imag(*p); double u2 = ur * ur + ui * ui; -#endif double t = u2 * 0.1; *p *= complex_type(cos(t), sin(t)); ++p; } } + stop_counters(time, resource); + report_performance(__FILE__, "", time, resource); + return 0; } |
