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Work in progress. Detect wrong endianness reported by boost/detail/endian.hpp. Add intrinsic timing to benchmark.cpp. Add boost/endian/detail/intrinsic.hpp. Use intrinsics in converters when available. Begin adding convert_bytes tests to converter_test.cpp.

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Beman committed 2013-05-10 16:51:24 -04:00
1 parent fcb5386537
commit 553d6a2426
7 files changed
+183 -34
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test/benchmark.cpp
+24 -11
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@@ -35,6 +35,7 @@ namespace
#endif
typedef boost::timer::nanosecond_type nanosecond_t;
nanosecond_t benchmark(timee_func timee, const char* msg,
nanosecond_t overhead = 0)
{
@@ -58,7 +59,7 @@ namespace
t.stop();
times = t.elapsed();
cpu_time = (times.system + times.user) - overhead;
const long double sec = 1000000.0L;
const long double sec = 1000000000.0L;
cout.setf(std::ios_base::fixed, std::ios_base::floatfield);
cout.precision(places);
cout << msg << " " << cpu_time / sec << endl;
@@ -131,6 +132,11 @@ namespace
| (static_cast<uint32_t>(x) >> 24);
}
inline int32_t by_return_intrinsic(int32_t x)
{
return BOOST_ENDIAN_INTRINSIC_BYTE_SWAP_4(static_cast<uint32_t>(x));
}
inline int32_t by_return_pyry(int32_t x)
{
uint32_t step16;
@@ -146,42 +152,48 @@ namespace
| ((x >> 8) & 0x0000ff00);
}
int32_t modify_noop(int32_t x)
inline int32_t modify_noop(int32_t x)
{
int32_t v(x);
return v;
}
int32_t modify_in_place(int32_t x)
inline int32_t modify_in_place(int32_t x)
{
int32_t v(x);
in_place(v);
return v;
}
int32_t modify_by_return(int32_t x)
inline int32_t modify_by_return(int32_t x)
{
int32_t v(x);
return by_return(v);
}
int32_t modify_by_return_pyry(int32_t x)
inline int32_t modify_by_return_pyry(int32_t x)
{
int32_t v(x);
return by_return_pyry(v);
}
void non_modify_assign(int32_t x, int32_t& y)
inline int32_t modify_by_return_intrinsic(int32_t x)
{
int32_t v(x);
return by_return_intrinsic(v);
}
inline void non_modify_assign(int32_t x, int32_t& y)
{
y = x;
}
void non_modify_two_operand(int32_t x, int32_t& y)
inline void non_modify_two_operand(int32_t x, int32_t& y)
{
two_operand(x, y);
}
void non_modify_by_return(int32_t x, int32_t& y)
inline void non_modify_by_return(int32_t x, int32_t& y)
{
y = by_return(x);
}
@@ -198,9 +210,10 @@ int main(int argc, char * argv[])
#ifndef BOOST_TWO_ARG
overhead = benchmark(modify_noop, "modify no-op");
benchmark(modify_in_place, "modify in place", overhead);
benchmark(modify_by_return, "modify by return", overhead);
benchmark(modify_by_return_pyry, "modify by return", overhead);
benchmark(modify_in_place, "modify in place"/*, overhead*/);
benchmark(modify_by_return, "modify by return"/*, overhead*/);
benchmark(modify_by_return_pyry, "modify by return_pyry"/*, overhead*/);
benchmark(modify_by_return_intrinsic, "modify by return_intrinsic"/*, overhead*/);
#else
overhead = benchmark(non_modify_assign, "non_modify_assign ");
benchmark(non_modify_two_operand, "non_modify_two_operand", overhead);