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Rework ice40_dsp to map to SB_MAC16 earlier, and check before packing
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parent
162eab6b74
commit
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6 changed files with 119 additions and 40 deletions
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@ -28,6 +28,7 @@ $(eval $(call add_share_file,share/ice40,techlibs/ice40/cells_sim.v))
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$(eval $(call add_share_file,share/ice40,techlibs/ice40/latches_map.v))
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$(eval $(call add_share_file,share/ice40,techlibs/ice40/brams.txt))
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$(eval $(call add_share_file,share/ice40,techlibs/ice40/brams_map.v))
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$(eval $(call add_share_file,share/ice40,techlibs/ice40/dsp_map.v))
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$(eval $(call add_share_file,share/ice40,techlibs/ice40/abc_hx.box))
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$(eval $(call add_share_file,share/ice40,techlibs/ice40/abc_hx.lut))
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$(eval $(call add_share_file,share/ice40,techlibs/ice40/abc_lp.box))
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34
techlibs/ice40/dsp_map.v
Normal file
34
techlibs/ice40/dsp_map.v
Normal file
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@ -0,0 +1,34 @@
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module \$__MUL16X16 (input [15:0] A, input [15:0] B, output [31:0] Y);
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parameter A_SIGNED = 0;
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parameter B_SIGNED = 0;
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parameter A_WIDTH = 0;
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parameter B_WIDTH = 0;
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parameter Y_WIDTH = 0;
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SB_MAC16 #(
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.NEG_TRIGGER(1'b0),
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.C_REG(1'b0),
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.A_REG(1'b0),
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.B_REG(1'b0),
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.D_REG(1'b0),
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.TOP_8x8_MULT_REG(1'b0),
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.BOT_8x8_MULT_REG(1'b0),
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.PIPELINE_16x16_MULT_REG1(1'b0),
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.PIPELINE_16x16_MULT_REG2(1'b0),
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.TOPOUTPUT_SELECT(2'b11),
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.TOPADDSUB_LOWERINPUT(2'b0),
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.TOPADDSUB_UPPERINPUT(1'b0),
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.TOPADDSUB_CARRYSELECT(2'b0),
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.BOTOUTPUT_SELECT(2'b11),
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.BOTADDSUB_LOWERINPUT(2'b0),
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.BOTADDSUB_UPPERINPUT(1'b0),
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.BOTADDSUB_CARRYSELECT(2'b0),
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.MODE_8x8(1'b0),
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.A_SIGNED(A_SIGNED),
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.B_SIGNED(B_SIGNED)
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) _TECHMAP_REPLACE_ (
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.A(A),
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.B(B),
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.O(Y),
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);
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endmodule
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@ -266,7 +266,7 @@ struct SynthIce40Pass : public ScriptPass
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run("opt_expr");
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run("opt_clean");
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if (help_mode || dsp) {
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run("techmap -map +/mul2dsp.v -D DSP_A_MAXWIDTH=16 -D DSP_B_MAXWIDTH=16 -D DSP_A_MINWIDTH=2 -D DSP_B_MINWIDTH=2 -D DSP_Y_MINWIDTH=11 -D DSP_NAME=$__MUL16X16", "(if -dsp)");
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run("techmap -map +/mul2dsp.v -map +/ice40/dsp_map.v -D DSP_A_MAXWIDTH=16 -D DSP_B_MAXWIDTH=16 -D DSP_A_MINWIDTH=2 -D DSP_B_MINWIDTH=2 -D DSP_Y_MINWIDTH=11 -D DSP_NAME=$__MUL16X16", "(if -dsp)");
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run("opt_expr -fine", " (if -dsp)");
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run("ice40_dsp", " (if -dsp)");
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run("chtype -set $mul t:$__soft_mul","(if -dsp)");
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