diff options
Diffstat (limited to 'passes')
| -rw-r--r-- | passes/pmgen/split_shiftx.cc | 7 | ||||
| -rw-r--r-- | passes/pmgen/split_shiftx.pmg | 27 |
2 files changed, 18 insertions, 16 deletions
diff --git a/passes/pmgen/split_shiftx.cc b/passes/pmgen/split_shiftx.cc index 71fb4e9ef..672478959 100644 --- a/passes/pmgen/split_shiftx.cc +++ b/passes/pmgen/split_shiftx.cc @@ -26,9 +26,9 @@ PRIVATE_NAMESPACE_BEGIN void create_split_shiftx(split_shiftx_pm &pm) { - if (pm.st.shiftxB.empty()) - return; log_assert(pm.st.shiftx); + if (pm.blacklist_cells.count(pm.st.shiftx)) + return; SigSpec A = pm.st.shiftx->getPort("\\A"); SigSpec Y = pm.st.shiftx->getPort("\\Y"); const int A_WIDTH = pm.st.shiftx->getParam("\\A_WIDTH").as_int(); @@ -56,7 +56,8 @@ struct BitblastShiftxPass : public Pass { log(" split_shiftx [selection]\n"); log("\n"); log("Split up $shiftx cells where Y_WIDTH > 1, with consideration for any $macc\n"); - log("cells that may be driving their B inputs.\n"); + log("cells -- configured as a constant multiplier equal to Y_WIDTH -- that may be\n"); + log("driving their B inputs.\n"); log("\n"); } void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE diff --git a/passes/pmgen/split_shiftx.pmg b/passes/pmgen/split_shiftx.pmg index 11b19bfe4..c9e0ff995 100644 --- a/passes/pmgen/split_shiftx.pmg +++ b/passes/pmgen/split_shiftx.pmg @@ -5,50 +5,51 @@ match shiftx select param(shiftx, \Y_WIDTH).as_int() > 1 endmatch -code shiftxB - shiftxB = port(shiftx, \B); - const int b_width = param(shiftx, \B_WIDTH).as_int(); - if (param(shiftx, \B_SIGNED) != 0 && shiftxB[b_width-1] == RTLIL::S0) - shiftxB = shiftxB.extract(0, b_width-1); -endcode - match macc select macc->type == $macc select param(macc, \B_WIDTH).as_int() == 0 - index <SigSpec> port(macc, \Y) === shiftxB optional endmatch code shiftxB if (macc) { + shiftxB = port(shiftx, \B); + const int b_width = param(shiftx, \B_WIDTH).as_int(); + if (param(shiftx, \B_SIGNED) != 0 && shiftxB[b_width-1] == RTLIL::S0) + shiftxB = shiftxB.extract(0, b_width-1); + if (port(macc, \Y) != shiftxB) { + blacklist(shiftx); + reject; + } + Const config = param(macc, \CONFIG); const int config_width = param(macc, \CONFIG_WIDTH).as_int(); const int num_bits = config.extract(0, 4).as_int(); const int num_ports = (config_width - 4) / (2 + 2*num_bits); if (num_ports != 1) { - shiftxB = nullptr; + blacklist(shiftx); reject; } // IS_SIGNED? if (config[4] == 1) { - shiftxB = nullptr; + blacklist(shiftx); reject; } // DO_SUBTRACT? if (config[5] == 1) { - shiftxB = nullptr; + blacklist(shiftx); reject; } const int port_size_A = config.extract(6, num_bits).as_int(); const int port_size_B = config.extract(6 + num_bits, num_bits).as_int(); const SigSpec port_B = port(macc, \A).extract(port_size_A, port_size_B); if (!port_B.is_fully_const()) { - shiftxB = nullptr; + blacklist(shiftx); reject; } const int multiply_factor = port_B.as_int(); if (multiply_factor != param(shiftx, \Y_WIDTH).as_int()) { - shiftxB = nullptr; + blacklist(shiftx); reject; } shiftxB = port(macc, \A).extract(0, port_size_A); |