pattern ice40_dsp state clock state clock_pol cd_signed state sigA sigB sigCD sigH sigO state addAB muxAB ffO match mul select mul->type.in($mul, \SB_MAC16) select GetSize(mul->getPort(\A)) + GetSize(mul->getPort(\B)) > 10 endmatch code sigA sigB sigH SigSpec O; if (mul->type == $mul) O = mul->getPort(\Y); else if (mul->type == \SB_MAC16) O = mul->getPort(\O); else log_abort(); if (GetSize(O) <= 10) reject; sigA = port(mul, \A); int i; for (i = GetSize(sigA)-1; i > 0; i--) if (sigA[i] != sigA[i-1]) break; // Do not remove non-const sign bit if (sigA[i].wire) ++i; sigA.remove(i, GetSize(sigA)-i); sigB = port(mul, \B); for (i = GetSize(sigB)-1; i > 0; i--) if (sigB[i] != sigB[i-1]) break; // Do not remove non-const sign bit if (sigB[i].wire) ++i; sigB.remove(i, GetSize(sigB)-i); // Only care about those bits that are used for (i = 0; i < GetSize(O); i++) { if (nusers(O[i]) <= 1) break; sigH.append(O[i]); } log_assert(nusers(O.extract_end(i)) <= 1); endcode match ffA if mul->type != \SB_MAC16 || !param(mul, \A_REG).as_bool() select ffA->type.in($dff) filter GetSize(port(ffA, \Q)) >= GetSize(sigA) slice offset GetSize(port(ffA, \Q)) filter offset+GetSize(sigA) <= GetSize(port(ffA, \Q)) && port(ffA, \Q).extract(offset, GetSize(sigA)) == sigA optional endmatch code sigA clock clock_pol if (ffA) { for (auto b : port(ffA, \Q)) if (b.wire->get_bool_attribute(\keep)) reject; clock = port(ffA, \CLK).as_bit(); clock_pol = param(ffA, \CLK_POLARITY).as_bool(); sigA.replace(port(ffA, \Q), port(ffA, \D)); } endcode match ffB if mul->type != \SB_MAC16 || !param(mul, \B_REG).as_bool() select ffB->type.in($dff) filter GetSize(port(ffB, \Q)) >= GetSize(sigB) slice offset GetSize(port(ffB, \Q)) filter offset+GetSize(sigB) <= GetSize(port(ffB, \Q)) && port(ffB, \Q).extract(offset, GetSize(sigB)) == sigB optional endmatch code sigB clock clock_pol if (ffB) { for (auto b : port(ffB, \Q)) if (b.wire->get_bool_attribute(\keep)) reject; SigBit c = port(ffB, \CLK).as_bit(); bool cp = param(ffB, \CLK_POLARITY).as_bool(); if (clock != SigBit() && (c != clock || cp != clock_pol)) reject; clock = c; clock_pol = cp; sigB.replace(port(ffB, \Q), port(ffB, \D)); } endcode match ffFJKG // Ensure pipeline register is not already used if mul->type != \SB_MAC16 || (!param(mul, \TOP_8x8_MULT_REG).as_bool() && !param(mul, \BOT_8x8_MULT_REG).as_bool() && !param(mul, \PIPELINE_16x16_MULT_REG1).as_bool() && !param(mul, \PIPELINE_16x16_MULT_REG2).as_bool()) select ffFJKG->type.in($dff) select nusers(port(ffFJKG, \D)) == 2 index port(ffFJKG, \D) === sigH optional endmatch code sigH sigO clock clock_pol if (ffFJKG) { sigH = port(ffFJKG, \Q); for (auto b : sigH) if (b.wire->get_bool_attribute(\keep)) reject; SigBit c = port(ffFJKG, \CLK).as_bit(); bool cp = param(ffFJKG, \CLK_POLARITY).as_bool(); if (clock != SigBit() && (c != clock || cp != clock_pol)) reject; clock = c; clock_pol = cp; } sigO = sigH; endcode match addA select addA->type.in($add) select nusers(port(addA, \A)) == 2 filter param(addA, \A_WIDTH).as_int() <= GetSize(sigH) //index port(addA, \A) === sigH.extract(0, param(addA, \A_WIDTH).as_int()) filter port(addA, \A) == sigH.extract(0, param(addA, \A_WIDTH).as_int()) optional endmatch match addB if !addA select addB->type.in($add, $sub) select nusers(port(addB, \B)) == 2 filter param(addB, \B_WIDTH).as_int() <= GetSize(sigH) //index port(addB, \B) === sigH.extract(0, param(addB, \B_WIDTH).as_int()) filter port(addB, \B) == sigH.extract(0, param(addB, \B_WIDTH).as_int()) optional endmatch code addAB sigCD sigO cd_signed if (addA) { addAB = addA; sigCD = port(addAB, \B); cd_signed = param(addAB, \B_SIGNED).as_bool(); } else if (addB) { addAB = addB; sigCD = port(addAB, \A); cd_signed = param(addAB, \A_SIGNED).as_bool(); } if (addAB) { if (mul->type == \SB_MAC16) { // Ensure that adder is not used if (param(mul, \TOPOUTPUT_SELECT).as_int() != 3 || param(mul, \BOTOUTPUT_SELECT).as_int() != 3) reject; } int natural_mul_width = GetSize(sigA) + GetSize(sigB); int actual_mul_width = GetSize(sigH); int actual_acc_width = GetSize(sigCD); if ((actual_acc_width > actual_mul_width) && (natural_mul_width > actual_mul_width)) reject; // If accumulator, check adder width and signedness if (sigCD == sigH && (actual_acc_width != actual_mul_width) && (param(mul, \A_SIGNED).as_bool() != param(addAB, \A_SIGNED).as_bool())) reject; sigO = port(addAB, \Y); } endcode match muxA select muxA->type.in($mux) index nusers(port(muxA, \A)) === 2 index port(muxA, \A) === sigO optional endmatch match muxB if !muxA select muxB->type.in($mux) index nusers(port(muxB, \B)) === 2 index port(muxB, \B) === sigO optional endmatch code muxAB sigO if (muxA) muxAB = muxA; else if (muxB) muxAB = muxB; if (muxAB) sigO = port(muxAB, \Y); endcode match ffO_hilo // Ensure that register is not already used if mul->type != \SB_MAC16 || (mul->parameters.at(\TOPOUTPUT_SELECT, 0).as_int() != 1 && mul->parameters.at(\BOTOUTPUT_SELECT, 0).as_int() != 1) // Ensure that OLOADTOP/OLOADBOT is unused or zero if mul->type != \SB_MAC16 || (mul->connections_.at(\OLOADTOP, State::S0).is_fully_zero() && mul->connections_.at(\OLOADBOT, State::S0).is_fully_zero()) if nusers(sigO) == 2 select ffO_hilo->type.in($dff) filter GetSize(port(ffO_hilo, \D)) >= GetSize(sigO) slice offset GetSize(port(ffO_hilo, \D)) filter offset+GetSize(sigO) <= GetSize(port(ffO_hilo, \D)) && port(ffO_hilo, \D).extract(offset, GetSize(sigO)) == sigO optional endmatch match ffO_lo if !ffO_hilo && GetSize(sigO) > 16 // Ensure that register is not already used if mul->type != \SB_MAC16 || (mul->parameters.at(\TOPOUTPUT_SELECT, 0).as_int() != 1 && mul->parameters.at(\BOTOUTPUT_SELECT, 0).as_int() != 1) // Ensure that OLOADTOP/OLOADBOT is unused or zero if mul->type != \SB_MAC16 || (mul->connections_.at(\OLOADTOP, State::S0).is_fully_zero() && mul->connections_.at(\OLOADBOT, State::S0).is_fully_zero()) if nusers(sigO.extract(0, 16)) == 2 select ffO_lo->type.in($dff) filter GetSize(port(ffO_lo, \D)) >= 16 slice offset GetSize(port(ffO_lo, \D)) filter offset+GetSize(sigO) <= GetSize(port(ffO_lo, \D)) && port(ffO_lo, \D).extract(offset, 16) == sigO.extract(0, 16) optional endmatch code ffO clock clock_pol sigO sigCD cd_signed ffO = nullptr; if (ffO_hilo) ffO = ffO_hilo; else if (ffO_lo) ffO = ffO_lo; if (ffO) { for (auto b : port(ffO, \Q)) if (b.wire->get_bool_attribute(\keep)) reject; SigBit c = port(ffO, \CLK).as_bit(); bool cp = param(ffO, \CLK_POLARITY).as_bool(); if (clock != SigBit() && (c != clock || cp != clock_pol)) reject; clock = c; clock_pol = cp; sigO.replace(port(ffO, \D), port(ffO, \Q)); // Loading value into output register is not // supported unless using accumulator if (muxAB) { if (sigCD != sigO) reject; if (muxA) sigCD = port(muxAB, \B); else if (muxB) sigCD = port(muxAB, \A); else log_abort(); cd_signed = addAB && param(addAB, \A_SIGNED).as_bool() && param(addAB, \B_SIGNED).as_bool(); } } sigCD.extend_u0(32, cd_signed); endcode code accept; endcode