mirror of
https://github.com/YosysHQ/yosys
synced 2025-08-07 11:41:23 +00:00
Merge upstream
This commit is contained in:
Akash Levy
parent
12137c7ac4
commit
881080a827
43 changed files with 510 additions and 94 deletions
319
techlibs/ice40/ice40_dsp.cc
Normal file
319
techlibs/ice40/ice40_dsp.cc
Normal file
|
|
@ -0,0 +1,319 @@
|
|||
/*
|
||||
* yosys -- Yosys Open SYnthesis Suite
|
||||
*
|
||||
* Copyright (C) 2012 Claire Xenia Wolf <claire@yosyshq.com>
|
||||
*
|
||||
* 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 "kernel/yosys.h"
|
||||
#include "kernel/sigtools.h"
|
||||
|
||||
USING_YOSYS_NAMESPACE
|
||||
PRIVATE_NAMESPACE_BEGIN
|
||||
|
||||
#include "techlibs/ice40/ice40_dsp_pm.h"
|
||||
|
||||
void create_ice40_dsp(ice40_dsp_pm &pm)
|
||||
{
|
||||
auto &st = pm.st_ice40_dsp;
|
||||
|
||||
log("Checking %s.%s for iCE40 DSP inference.\n", log_id(pm.module), log_id(st.mul));
|
||||
|
||||
log_debug("ffA: %s\n", log_id(st.ffA, "--"));
|
||||
log_debug("ffB: %s\n", log_id(st.ffB, "--"));
|
||||
log_debug("ffCD: %s\n", log_id(st.ffCD, "--"));
|
||||
log_debug("mul: %s\n", log_id(st.mul, "--"));
|
||||
log_debug("ffFJKG: %s\n", log_id(st.ffFJKG, "--"));
|
||||
log_debug("ffH: %s\n", log_id(st.ffH, "--"));
|
||||
log_debug("add: %s\n", log_id(st.add, "--"));
|
||||
log_debug("mux: %s\n", log_id(st.mux, "--"));
|
||||
log_debug("ffO: %s\n", log_id(st.ffO, "--"));
|
||||
log_debug("\n");
|
||||
|
||||
if (GetSize(st.sigA) > 16) {
|
||||
log(" input A (%s) is too large (%d > 16).\n", log_signal(st.sigA), GetSize(st.sigA));
|
||||
return;
|
||||
}
|
||||
|
||||
if (GetSize(st.sigB) > 16) {
|
||||
log(" input B (%s) is too large (%d > 16).\n", log_signal(st.sigB), GetSize(st.sigB));
|
||||
return;
|
||||
}
|
||||
|
||||
if (GetSize(st.sigO) > 33) {
|
||||
log(" adder/accumulator (%s) is too large (%d > 33).\n", log_signal(st.sigO), GetSize(st.sigO));
|
||||
return;
|
||||
}
|
||||
|
||||
if (GetSize(st.sigH) > 32) {
|
||||
log(" output (%s) is too large (%d > 32).\n", log_signal(st.sigH), GetSize(st.sigH));
|
||||
return;
|
||||
}
|
||||
|
||||
Cell *cell = st.mul;
|
||||
if (cell->type == ID($mul)) {
|
||||
log(" replacing %s with SB_MAC16 cell.\n", log_id(st.mul->type));
|
||||
|
||||
cell = pm.module->addCell(NEW_ID, ID(SB_MAC16));
|
||||
pm.module->swap_names(cell, st.mul);
|
||||
}
|
||||
else log_assert(cell->type == ID(SB_MAC16));
|
||||
|
||||
// SB_MAC16 Input Interface
|
||||
SigSpec A = st.sigA;
|
||||
A.extend_u0(16, st.mul->getParam(ID::A_SIGNED).as_bool());
|
||||
log_assert(GetSize(A) == 16);
|
||||
|
||||
SigSpec B = st.sigB;
|
||||
B.extend_u0(16, st.mul->getParam(ID::B_SIGNED).as_bool());
|
||||
log_assert(GetSize(B) == 16);
|
||||
|
||||
SigSpec CD = st.sigCD;
|
||||
if (CD.empty())
|
||||
CD = RTLIL::Const(0, 32);
|
||||
else
|
||||
log_assert(GetSize(CD) == 32);
|
||||
|
||||
cell->setPort(ID::A, A);
|
||||
cell->setPort(ID::B, B);
|
||||
cell->setPort(ID::C, CD.extract(16, 16));
|
||||
cell->setPort(ID::D, CD.extract(0, 16));
|
||||
|
||||
cell->setParam(ID(A_REG), st.ffA ? State::S1 : State::S0);
|
||||
cell->setParam(ID(B_REG), st.ffB ? State::S1 : State::S0);
|
||||
cell->setParam(ID(C_REG), st.ffCD ? State::S1 : State::S0);
|
||||
cell->setParam(ID(D_REG), st.ffCD ? State::S1 : State::S0);
|
||||
|
||||
SigSpec AHOLD, BHOLD, CDHOLD;
|
||||
if (st.ffA && st.ffA->hasPort(ID::EN))
|
||||
AHOLD = st.ffA->getParam(ID::EN_POLARITY).as_bool() ? pm.module->Not(NEW_ID, st.ffA->getPort(ID::EN)) : st.ffA->getPort(ID::EN);
|
||||
else
|
||||
AHOLD = State::S0;
|
||||
if (st.ffB && st.ffB->hasPort(ID::EN))
|
||||
BHOLD = st.ffB->getParam(ID::EN_POLARITY).as_bool() ? pm.module->Not(NEW_ID, st.ffB->getPort(ID::EN)) : st.ffB->getPort(ID::EN);
|
||||
else
|
||||
BHOLD = State::S0;
|
||||
if (st.ffCD && st.ffCD->hasPort(ID::EN))
|
||||
CDHOLD = st.ffCD->getParam(ID::EN_POLARITY).as_bool() ? pm.module->Not(NEW_ID, st.ffCD->getPort(ID::EN)) : st.ffCD->getPort(ID::EN);
|
||||
else
|
||||
CDHOLD = State::S0;
|
||||
cell->setPort(ID(AHOLD), AHOLD);
|
||||
cell->setPort(ID(BHOLD), BHOLD);
|
||||
cell->setPort(ID(CHOLD), CDHOLD);
|
||||
cell->setPort(ID(DHOLD), CDHOLD);
|
||||
|
||||
SigSpec IRSTTOP, IRSTBOT;
|
||||
if (st.ffA && st.ffA->hasPort(ID::ARST))
|
||||
IRSTTOP = st.ffA->getParam(ID::ARST_POLARITY).as_bool() ? st.ffA->getPort(ID::ARST) : pm.module->Not(NEW_ID, st.ffA->getPort(ID::ARST));
|
||||
else
|
||||
IRSTTOP = State::S0;
|
||||
if (st.ffB && st.ffB->hasPort(ID::ARST))
|
||||
IRSTBOT = st.ffB->getParam(ID::ARST_POLARITY).as_bool() ? st.ffB->getPort(ID::ARST) : pm.module->Not(NEW_ID, st.ffB->getPort(ID::ARST));
|
||||
else
|
||||
IRSTBOT = State::S0;
|
||||
cell->setPort(ID(IRSTTOP), IRSTTOP);
|
||||
cell->setPort(ID(IRSTBOT), IRSTBOT);
|
||||
|
||||
if (st.clock != SigBit())
|
||||
{
|
||||
cell->setPort(ID::CLK, st.clock);
|
||||
cell->setPort(ID(CE), State::S1);
|
||||
cell->setParam(ID(NEG_TRIGGER), st.clock_pol ? State::S0 : State::S1);
|
||||
|
||||
log(" clock: %s (%s)", log_signal(st.clock), st.clock_pol ? "posedge" : "negedge");
|
||||
|
||||
if (st.ffA)
|
||||
log(" ffA:%s", log_id(st.ffA));
|
||||
|
||||
if (st.ffB)
|
||||
log(" ffB:%s", log_id(st.ffB));
|
||||
|
||||
if (st.ffCD)
|
||||
log(" ffCD:%s", log_id(st.ffCD));
|
||||
|
||||
if (st.ffFJKG)
|
||||
log(" ffFJKG:%s", log_id(st.ffFJKG));
|
||||
|
||||
if (st.ffH)
|
||||
log(" ffH:%s", log_id(st.ffH));
|
||||
|
||||
if (st.ffO)
|
||||
log(" ffO:%s", log_id(st.ffO));
|
||||
|
||||
log("\n");
|
||||
}
|
||||
else
|
||||
{
|
||||
cell->setPort(ID::CLK, State::S0);
|
||||
cell->setPort(ID(CE), State::S0);
|
||||
cell->setParam(ID(NEG_TRIGGER), State::S0);
|
||||
}
|
||||
|
||||
// SB_MAC16 Cascade Interface
|
||||
|
||||
cell->setPort(ID(SIGNEXTIN), State::Sx);
|
||||
cell->setPort(ID(SIGNEXTOUT), pm.module->addWire(NEW_ID));
|
||||
|
||||
cell->setPort(ID::CI, State::Sx);
|
||||
|
||||
cell->setPort(ID(ACCUMCI), State::Sx);
|
||||
cell->setPort(ID(ACCUMCO), pm.module->addWire(NEW_ID));
|
||||
|
||||
// SB_MAC16 Output Interface
|
||||
|
||||
SigSpec O = st.sigO;
|
||||
int O_width = GetSize(O);
|
||||
if (O_width == 33) {
|
||||
log_assert(st.add);
|
||||
// If we have a signed multiply-add, then perform sign extension
|
||||
if (st.add->getParam(ID::A_SIGNED).as_bool() && st.add->getParam(ID::B_SIGNED).as_bool())
|
||||
pm.module->connect(O[32], O[31]);
|
||||
else
|
||||
cell->setPort(ID::CO, O[32]);
|
||||
O.remove(O_width-1);
|
||||
}
|
||||
else
|
||||
cell->setPort(ID::CO, pm.module->addWire(NEW_ID));
|
||||
log_assert(GetSize(O) <= 32);
|
||||
if (GetSize(O) < 32)
|
||||
O.append(pm.module->addWire(NEW_ID, 32-GetSize(O)));
|
||||
|
||||
cell->setPort(ID::O, O);
|
||||
|
||||
bool accum = false;
|
||||
if (st.add) {
|
||||
accum = (st.ffO && st.add->getPort(st.addAB == ID::A ? ID::B : ID::A) == st.sigO);
|
||||
if (accum)
|
||||
log(" accumulator %s (%s)\n", log_id(st.add), log_id(st.add->type));
|
||||
else
|
||||
log(" adder %s (%s)\n", log_id(st.add), log_id(st.add->type));
|
||||
cell->setPort(ID(ADDSUBTOP), st.add->type == ID($add) ? State::S0 : State::S1);
|
||||
cell->setPort(ID(ADDSUBBOT), st.add->type == ID($add) ? State::S0 : State::S1);
|
||||
} else {
|
||||
cell->setPort(ID(ADDSUBTOP), State::S0);
|
||||
cell->setPort(ID(ADDSUBBOT), State::S0);
|
||||
}
|
||||
|
||||
SigSpec OHOLD;
|
||||
if (st.ffO && st.ffO->hasPort(ID::EN))
|
||||
OHOLD = st.ffO->getParam(ID::EN_POLARITY).as_bool() ? pm.module->Not(NEW_ID, st.ffO->getPort(ID::EN)) : st.ffO->getPort(ID::EN);
|
||||
else
|
||||
OHOLD = State::S0;
|
||||
cell->setPort(ID(OHOLDTOP), OHOLD);
|
||||
cell->setPort(ID(OHOLDBOT), OHOLD);
|
||||
|
||||
SigSpec ORST;
|
||||
if (st.ffO && st.ffO->hasPort(ID::ARST))
|
||||
ORST = st.ffO->getParam(ID::ARST_POLARITY).as_bool() ? st.ffO->getPort(ID::ARST) : pm.module->Not(NEW_ID, st.ffO->getPort(ID::ARST));
|
||||
else
|
||||
ORST = State::S0;
|
||||
cell->setPort(ID(ORSTTOP), ORST);
|
||||
cell->setPort(ID(ORSTBOT), ORST);
|
||||
|
||||
SigSpec acc_reset = State::S0;
|
||||
if (st.mux) {
|
||||
if (st.muxAB == ID::A)
|
||||
acc_reset = st.mux->getPort(ID::S);
|
||||
else
|
||||
acc_reset = pm.module->Not(NEW_ID, st.mux->getPort(ID::S));
|
||||
} else if (st.ffO && st.ffO->hasPort(ID::SRST)) {
|
||||
acc_reset = st.ffO->getParam(ID::SRST_POLARITY).as_bool() ? st.ffO->getPort(ID::SRST) : pm.module->Not(NEW_ID, st.ffO->getPort(ID::SRST));
|
||||
}
|
||||
cell->setPort(ID(OLOADTOP), acc_reset);
|
||||
cell->setPort(ID(OLOADBOT), acc_reset);
|
||||
|
||||
// SB_MAC16 Remaining Parameters
|
||||
|
||||
cell->setParam(ID(TOP_8x8_MULT_REG), st.ffFJKG ? State::S1 : State::S0);
|
||||
cell->setParam(ID(BOT_8x8_MULT_REG), st.ffFJKG ? State::S1 : State::S0);
|
||||
cell->setParam(ID(PIPELINE_16x16_MULT_REG1), st.ffFJKG ? State::S1 : State::S0);
|
||||
cell->setParam(ID(PIPELINE_16x16_MULT_REG2), st.ffH ? State::S1 : State::S0);
|
||||
|
||||
cell->setParam(ID(TOPADDSUB_LOWERINPUT), Const(2, 2));
|
||||
cell->setParam(ID(TOPADDSUB_UPPERINPUT), accum ? State::S0 : State::S1);
|
||||
cell->setParam(ID(TOPADDSUB_CARRYSELECT), Const(3, 2));
|
||||
|
||||
cell->setParam(ID(BOTADDSUB_LOWERINPUT), Const(2, 2));
|
||||
cell->setParam(ID(BOTADDSUB_UPPERINPUT), accum ? State::S0 : State::S1);
|
||||
cell->setParam(ID(BOTADDSUB_CARRYSELECT), Const(0, 2));
|
||||
|
||||
cell->setParam(ID(MODE_8x8), State::S0);
|
||||
cell->setParam(ID::A_SIGNED, st.mul->getParam(ID::A_SIGNED).as_bool());
|
||||
cell->setParam(ID::B_SIGNED, st.mul->getParam(ID::B_SIGNED).as_bool());
|
||||
|
||||
if (st.ffO) {
|
||||
if (st.o_lo)
|
||||
cell->setParam(ID(TOPOUTPUT_SELECT), Const(st.add ? 0 : 3, 2));
|
||||
else
|
||||
cell->setParam(ID(TOPOUTPUT_SELECT), Const(1, 2));
|
||||
|
||||
st.ffO->connections_.at(ID::Q).replace(O, pm.module->addWire(NEW_ID, GetSize(O)));
|
||||
cell->setParam(ID(BOTOUTPUT_SELECT), Const(1, 2));
|
||||
}
|
||||
else {
|
||||
cell->setParam(ID(TOPOUTPUT_SELECT), Const(st.add ? 0 : 3, 2));
|
||||
cell->setParam(ID(BOTOUTPUT_SELECT), Const(st.add ? 0 : 3, 2));
|
||||
}
|
||||
|
||||
if (cell != st.mul)
|
||||
pm.autoremove(st.mul);
|
||||
else
|
||||
pm.blacklist(st.mul);
|
||||
pm.autoremove(st.ffFJKG);
|
||||
pm.autoremove(st.add);
|
||||
}
|
||||
|
||||
struct Ice40DspPass : public Pass {
|
||||
Ice40DspPass() : Pass("ice40_dsp", "iCE40: map multipliers") { }
|
||||
void help() override
|
||||
{
|
||||
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
|
||||
log("\n");
|
||||
log(" ice40_dsp [options] [selection]\n");
|
||||
log("\n");
|
||||
log("Map multipliers ($mul/SB_MAC16) and multiply-accumulate ($mul/SB_MAC16 + $add)\n");
|
||||
log("cells into iCE40 DSP resources.\n");
|
||||
log("Currently, only the 16x16 multiply mode is supported and not the 2 x 8x8 mode.\n");
|
||||
log("\n");
|
||||
log("Pack input registers (A, B, {C,D}; with optional hold), pipeline registers\n");
|
||||
log("({F,J,K,G}, H), output registers (O -- full 32-bits or lower 16-bits only; with\n");
|
||||
log("optional hold), and post-adder into the SB_MAC16 resource.\n");
|
||||
log("\n");
|
||||
log("Multiply-accumulate operations using the post-adder with feedback on the {C,D}\n");
|
||||
log("input will be folded into the DSP. In this scenario only, resetting the\n");
|
||||
log("the accumulator to an arbitrary value can be inferred to use the {C,D} input.\n");
|
||||
log("\n");
|
||||
}
|
||||
void execute(std::vector<std::string> args, RTLIL::Design *design) override
|
||||
{
|
||||
log_header(design, "Executing ICE40_DSP pass (map multipliers).\n");
|
||||
|
||||
size_t argidx;
|
||||
for (argidx = 1; argidx < args.size(); argidx++)
|
||||
{
|
||||
// if (args[argidx] == "-singleton") {
|
||||
// singleton_mode = true;
|
||||
// continue;
|
||||
// }
|
||||
break;
|
||||
}
|
||||
extra_args(args, argidx, design);
|
||||
|
||||
for (auto module : design->selected_modules())
|
||||
ice40_dsp_pm(module, module->selected_cells()).run_ice40_dsp(create_ice40_dsp);
|
||||
}
|
||||
} Ice40DspPass;
|
||||
|
||||
PRIVATE_NAMESPACE_END
|
||||
Loading…
Add table
Add a link
Reference in a new issue