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analogdevices: DSP inference

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This commit is contained in:
Lofty 2025-10-16 23:33:59 +01:00
parent aab52403f1
commit 059925a56a
4 changed files with 122 additions and 788 deletions
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4
techlibs/analogdevices/synth_analogdevices.cc
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@ -316,14 +316,14 @@ struct SynthAnalogDevicesPass : public ScriptPass
// NB: Xilinx multipliers are signed only
if (help_mode)
run("techmap -map +/mul2dsp.v -map +/analogdevices/{family}_dsp_map.v {options}");
run("techmap -map +/mul2dsp.v -map +/analogdevices/dsp_map.v -D DSP_A_MAXWIDTH=25 -D DSP_B_MAXWIDTH=18 "
run("techmap -map +/mul2dsp.v -map +/analogdevices/dsp_map.v -D DSP_A_MAXWIDTH=22 -D DSP_B_MAXWIDTH=22 "
"-D DSP_A_MAXWIDTH_PARTIAL=18 " // Partial multipliers are intentionally
// limited to 18x18 in order to take
// advantage of the (PCOUT << 17) -> PCIN
// dedicated cascade chain capability
"-D DSP_A_MINWIDTH=2 -D DSP_B_MINWIDTH=2 " // Blocks Nx1 multipliers
"-D DSP_Y_MINWIDTH=9 " // UG901 suggests small multiplies are those 4x4 and smaller
"-D DSP_SIGNEDONLY=1 -D DSP_NAME=$__MUL25X18");
"-D DSP_SIGNEDONLY=1 -D DSP_NAME=$__MUL22X22");
run("select a:mul2dsp");
run("setattr -unset mul2dsp");