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diff --git a/mistral/pins.cc b/mistral/pins.cc
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+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2021  gatecat <gatecat@ds0.me>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "log.h"
+#include "nextpnr.h"
+#include "util.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+const std::unordered_map<IdString, Arch::CellPinsData> Arch::cell_pins_db = {
+        // For combinational cells, inversion and tieing can be implemented by manipulating the LUT function
+        {id_MISTRAL_ALUT2, {{{}, PINSTYLE_COMB}}},
+        {id_MISTRAL_ALUT3, {{{}, PINSTYLE_COMB}}},
+        {id_MISTRAL_ALUT4, {{{}, PINSTYLE_COMB}}},
+        {id_MISTRAL_ALUT5, {{{}, PINSTYLE_COMB}}},
+        {id_MISTRAL_ALUT6, {{{}, PINSTYLE_COMB}}},
+        {id_MISTRAL_ALUT_ARITH,
+         {// Leave carry chain alone, other than disconnecting a ground constant
+          {id_CI, PINSTYLE_CARRY},
+          {{}, PINSTYLE_COMB}}},
+        {id_MISTRAL_FF,
+         {
+                 {id_CLK, PINSTYLE_CLK},
+                 {id_ENA, PINSTYLE_CE},
+                 {id_ACLR, PINSTYLE_RST},
+                 {id_SCLR, PINSTYLE_RST},
+                 {id_SLOAD, PINSTYLE_RST},
+                 {id_SDATA, PINSTYLE_DEDI},
+                 {id_DATAIN, PINSTYLE_INP},
+         }},
+};
+
+CellPinStyle Arch::get_cell_pin_style(const CellInfo *cell, IdString port) const
+{
+    // Look up the pin style in the cell database
+    auto fnd_cell = cell_pins_db.find(cell->type);
+    if (fnd_cell == cell_pins_db.end())
+        return PINSTYLE_NONE;
+    auto fnd_port = fnd_cell->second.find(port);
+    if (fnd_port != fnd_cell->second.end())
+        return fnd_port->second;
+    // If there isn't an exact port match, then the empty IdString
+    // represents a wildcard default match
+    auto fnd_default = fnd_cell->second.find({});
+    if (fnd_default != fnd_cell->second.end())
+        return fnd_default->second;
+
+    return PINSTYLE_NONE;
+}
+
+NEXTPNR_NAMESPACE_END