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netlist: optimized 7416

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This commit is contained in:
couriersud 2020-08-20 18:16:06 +02:00
parent 3aaa8706da
commit 1e74aa6bff
1 changed files with 29 additions and 25 deletions
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54
src/lib/netlist/devices/nld_74165.cpp
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@ -31,56 +31,61 @@ namespace netlist
{
namespace devices
{
NETLIB_OBJECT(74165)
{
NETLIB_CONSTRUCTOR(74165)
, m_DATA(*this, { "H", "G", "F", "E", "D", "C", "B", "A" }, NETLIB_DELEGATE(inputs))
, m_SER(*this, "SER", NETLIB_DELEGATE(inputs))
, m_SER(*this, "SER", NETLIB_DELEGATE(noop))
, m_SH_LDQ(*this, "SH_LDQ", NETLIB_DELEGATE(inputs))
, m_CLK(*this, "CLK", NETLIB_DELEGATE(inputs))
, m_CLK(*this, "CLK", NETLIB_DELEGATE(clk))
, m_CLKINH(*this, "CLKINH", NETLIB_DELEGATE(inputs))
, m_QH(*this, "QH")
, m_QHQ(*this, "QHQ")
, m_shifter(*this, "m_shifter", 0)
, m_last_CLK(*this, "m_last_CLK", 0)
, m_power_pins(*this)
{
}
NETLIB_RESETI()
{
m_CLK.set_state(logic_t::STATE_INP_LH);
m_shifter = 0;
m_last_CLK = 0;
}
NETLIB_HANDLERI(noop)
{
}
NETLIB_HANDLERI(clk)
{
unsigned high_bit = m_SER() ? 0x80 : 0;
m_shifter = high_bit | (m_shifter >> 1);
const auto qh = m_shifter & 1;
m_QH.push(qh, NLTIME_FROM_NS(20)); // FIXME: Timing
m_QHQ.push(qh ^ 1, NLTIME_FROM_NS(20)); // FIXME: Timing
}
NETLIB_HANDLERI(inputs)
{
if (!m_SH_LDQ())
{
netlist_sig_t qh = 0;
if (!m_SH_LDQ())
{
m_shifter = 0;
for (std::size_t i=0; i<8; i++)
m_shifter |= (m_DATA[i]() << i);
}
else if (m_CLK() && !m_last_CLK && !m_CLKINH())
{
unsigned high_bit = m_SER() ? 0x80 : 0;
m_shifter = high_bit | (m_shifter >> 1);
}
qh = m_shifter & 1;
m_last_CLK = m_CLK();
m_shifter = 0;
for (std::size_t i=0; i<8; i++)
m_shifter |= (m_DATA[i]() << i);
const auto qh = m_shifter & 1;
m_QH.push(qh, NLTIME_FROM_NS(20)); // FIXME: Timing
m_QHQ.push(qh ? 0 : 1, NLTIME_FROM_NS(20)); // FIXME: Timing
m_QHQ.push(qh ^ 1, NLTIME_FROM_NS(20)); // FIXME: Timing
}
if (!m_SH_LDQ() || m_CLKINH())
m_CLK.inactivate();
else
m_CLK.activate_lh();
}
friend class NETLIB_NAME(74165_dip);
private:
object_array_t<logic_input_t, 8> m_DATA;
logic_input_t m_SER;
@ -91,7 +96,6 @@ namespace netlist
logic_output_t m_QHQ;
state_var<unsigned> m_shifter;
state_var<unsigned> m_last_CLK;
nld_power_pins m_power_pins;
};