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systemc: Implement sc_buffer.

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This required a small change to sc_signal so that the value change
event and the change stamp for it were accessible.

Change-Id: Ife0545d84f3b25e98da079786c30ffa51025cce7
Reviewed-on: https://gem5-review.googlesource.com/c/12804
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
This commit is contained in:
Gabe Black
2018-09-11 21:46:12 -07:00
parent 402377f41e
commit 8817e547e5
2 changed files with 42 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
src/systemc/ext/channel/sc_buffer.hh
View File

@@ -32,7 +32,6 @@
#include "../core/sc_module.hh" // for sc_gen_unique_name
#include "sc_signal.hh"
#include "warn_unimpl.hh" // for warn_unimpl
namespace sc_core
{
@@ -49,27 +48,28 @@ class sc_buffer : public sc_signal<T, WRITER_POLICY>
{}
virtual void
write(const T&)
write(const T &t)
{
sc_channel_warn_unimpl(__PRETTY_FUNCTION__);
this->m_new_val = t;
this->request_update();
}
sc_buffer<T, WRITER_POLICY> &
operator = (const T &)
operator = (const T &arg)
{
sc_channel_warn_unimpl(__PRETTY_FUNCTION__);
write(arg);
return *this;
}
sc_buffer<T, WRITER_POLICY> &
operator = (const sc_signal<T, WRITER_POLICY> &)
operator = (const sc_signal<T, WRITER_POLICY> &arg)
{
sc_channel_warn_unimpl(__PRETTY_FUNCTION__);
write(arg.read());
return *this;
}
sc_buffer<T, WRITER_POLICY> &
operator = (const sc_buffer<T, WRITER_POLICY> &)
operator = (const sc_buffer<T, WRITER_POLICY> &arg)
{
sc_channel_warn_unimpl(__PRETTY_FUNCTION__);
write(arg.read());
return *this;
}
@@ -79,7 +79,8 @@ class sc_buffer : public sc_signal<T, WRITER_POLICY>
virtual void
update()
{
sc_channel_warn_unimpl(__PRETTY_FUNCTION__);
this->m_cur_val = this->m_new_val;
this->_signalChange();
}
private:

39
src/systemc/ext/channel/sc_signal.hh
View File

@@ -151,6 +151,14 @@ class sc_signal : public sc_signal_inout_if<T>,
return;
m_cur_val = m_new_val;
_signalChange();
_changeStamp = ::sc_gem5::getChangeStamp();
_valueChangedEvent.notify(SC_ZERO_TIME);
}
void
_signalChange()
{
_changeStamp = ::sc_gem5::getChangeStamp();
_valueChangedEvent.notify(SC_ZERO_TIME);
}
@@ -293,18 +301,23 @@ class sc_signal<bool, WRITER_POLICY> :
return;
m_cur_val = m_new_val;
uint64_t change_stamp = ::sc_gem5::getChangeStamp();
_changeStamp = change_stamp;
_valueChangedEvent.notify(SC_ZERO_TIME);
_signalChange();
if (m_cur_val) {
_posStamp = change_stamp;
_posStamp = ::sc_gem5::getChangeStamp();
_posedgeEvent.notify(SC_ZERO_TIME);
} else {
_negStamp = change_stamp;
_negStamp = ::sc_gem5::getChangeStamp();
_negedgeEvent.notify(SC_ZERO_TIME);
}
}
void
_signalChange()
{
_changeStamp = ::sc_gem5::getChangeStamp();
_valueChangedEvent.notify(SC_ZERO_TIME);
}
bool m_cur_val;
bool m_new_val;
@@ -438,11 +451,21 @@ class sc_signal<sc_dt::sc_logic, WRITER_POLICY> :
return;
m_cur_val = m_new_val;
_valueChangedEvent.notify(SC_ZERO_TIME);
if (m_cur_val == sc_dt::SC_LOGIC_1)
_signalChange();
if (m_cur_val == sc_dt::SC_LOGIC_1) {
_posStamp = ::sc_gem5::getChangeStamp();
_posedgeEvent.notify(SC_ZERO_TIME);
else if (m_cur_val == sc_dt::SC_LOGIC_0)
} else if (m_cur_val == sc_dt::SC_LOGIC_0) {
_negStamp = ::sc_gem5::getChangeStamp();
_negedgeEvent.notify(SC_ZERO_TIME);
}
}
void
_signalChange()
{
_changeStamp = ::sc_gem5::getChangeStamp();
_valueChangedEvent.notify(SC_ZERO_TIME);
}
sc_dt::sc_logic m_cur_val;