caiyu/nextpnr
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ecp5: Add DP16KD timing analysis

Browse Source 
Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2018-10-16 13:30:23 +01:00
parent 1fc2318c53
commit 3aa3f5d796
1 changed files with 29 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
ecp5/arch.cc
View File

@ -19,6 +19,7 @@
*/ */
#include <algorithm> #include <algorithm>
#include <boost/range/adaptor/reversed.hpp>
#include <cmath> #include <cmath>
#include <cstring> #include <cstring>
#include "gfx.h" #include "gfx.h"
@ -531,6 +532,19 @@ bool Arch::getCellDelay(const CellInfo *cell, IdString fromPort, IdString toPort
return true; return true;
} }
return false; return false;
} else if (cell->type == id_DP16KD) {
if (fromPort == id_CLKA) {
if (toPort.str(this).substr(0, 3) == "DOA") {
delay.delay = 4260;
return true;
}
} else if (fromPort == id_CLKB) {
if (toPort.str(this).substr(0, 3) == "DOB") {
delay.delay = 4280;
return true;
}
}
return false;
} else { } else {
return false; return false;
} }
@ -583,8 +597,21 @@ TimingPortClass Arch::getPortTimingClass(const CellInfo *cell, IdString port, Id
return TMG_COMB_OUTPUT; return TMG_COMB_OUTPUT;
return TMG_IGNORE; return TMG_IGNORE;
} else if (cell->type == id_DP16KD) { } else if (cell->type == id_DP16KD) {
// FIXME if (port == id_CLKA || port == id_CLKB)
return TMG_IGNORE; return TMG_CLOCK_INPUT;
std::string port_name = port.str(this);
for (auto c : boost::adaptors::reverse(port_name)) {
if (std::isdigit(c))
continue;
if (c == 'A')
clockPort = id_CLKA;
else if (c == 'B')
clockPort = id_CLKB;
else
NPNR_ASSERT_FALSE_STR("bad ram port");
return (cell->ports.at(port).type == PORT_OUT) ? TMG_REGISTER_OUTPUT : TMG_REGISTER_INPUT;
}
NPNR_ASSERT_FALSE_STR("no timing type for RAM port '" + port.str(this) + "'");
} else { } else {
NPNR_ASSERT_FALSE_STR("no timing data for cell type '" + cell->type.str(this) + "'"); NPNR_ASSERT_FALSE_STR("no timing data for cell type '" + cell->type.str(this) + "'");
} }