diff options
author | 2016-06-23 02:04:40 +0200 | |
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committer | 2016-06-23 02:04:51 +0200 | |
commit | c6e6911aed7687b94fba52485d89f0903e102d0e (patch) | |
tree | dac88b6a6e1db607726e90bb7d7d2f5e0913ede1 /src/lib/netlist/plib/pchrono.cpp | |
parent | 224dbf1cc9fa8a6c49ee9529d3045474194667ef (diff) |
Netlist changes
- Replaced shared_ptr by unique_ptr.
- Better seperation of setup_t and netlist_t.
- Fixed bugs in rdtsc code. Refactored timer code.
- Simplify conditional activation/deactivation.
- Introduced HINT(device, hint) to clarify that hints are inheritent
and not specific to devices.
- Added improved profiling support to netlist. Statistics output now
proposes devices for which whole device activation/deactivation be
disabled. No significant improvement for pong, but breakout
experiences a 10% improvement.
- Moved options code from include to cpp file.
- Minor modifications to 7493 and 9316
- Introduced perftime_t and perfcount_t for gathering statistics. These
templates do not create any code if statistics are not kept.
- Make help2man ./nltool produce usuable output.
- More truthtable refactoring. Removed half-finished code for internal
state support. As implemented, this would have had no support for
timing delays.
[Couriersud]
Diffstat (limited to 'src/lib/netlist/plib/pchrono.cpp')
-rw-r--r-- | src/lib/netlist/plib/pchrono.cpp | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/lib/netlist/plib/pchrono.cpp b/src/lib/netlist/plib/pchrono.cpp new file mode 100644 index 00000000000..3beb3b2f161 --- /dev/null +++ b/src/lib/netlist/plib/pchrono.cpp @@ -0,0 +1,55 @@ +// license:GPL-2.0+ +// copyright-holders:Couriersud + +#include <chrono> + +#include "pchrono.h" + +namespace plib { +namespace chrono { + + +#if defined(__x86_64__) && !defined(_clang__) && !defined(_MSC_VER) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 6)) + +fast_ticks::type fast_ticks::per_second() +{ + static type persec = 0; + if (persec == 0) + { + type x = 0; + system_ticks::type t = system_ticks::start(); + system_ticks::type e; + x = -start(); + do { + e = system_ticks::stop(); + } while (e - t < system_ticks::per_second() / 100 ); + x += stop(); + persec = (type)(double)((double) x * (double) system_ticks::per_second() / double (e - t)); + } + return persec; +} + +#if PUSE_ACCURATE_STATS && PHAS_RDTSCP +exact_ticks::type exact_ticks::per_second() +{ + static type persec = 0; + if (persec == 0) + { + type x = 0; + system_ticks::type t = system_ticks::start(); + system_ticks::type e; + x = -start(); + do { + e = system_ticks::stop(); + } while (e - t < system_ticks::per_second() / 100 ); + x += stop(); + persec = (type)(double)((double) x * (double) system_ticks::per_second() / double (e - t)); + } + return persec; +} +#endif + +#endif + +} +} |