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Rework ice40_dsp to map to SB_MAC16 earlier, and check before packing

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This commit is contained in:
Eddie Hung 2019-08-08 12:56:05 -07:00
parent 162eab6b74
commit 2c0be7aa5d
6 changed files with 119 additions and 40 deletions
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1
techlibs/ice40/Makefile.inc
View file

@ -28,6 +28,7 @@ $(eval $(call add_share_file,share/ice40,techlibs/ice40/cells_sim.v))
$(eval $(call add_share_file,share/ice40,techlibs/ice40/latches_map.v))
$(eval $(call add_share_file,share/ice40,techlibs/ice40/brams.txt))
$(eval $(call add_share_file,share/ice40,techlibs/ice40/brams_map.v))
$(eval $(call add_share_file,share/ice40,techlibs/ice40/dsp_map.v))
$(eval $(call add_share_file,share/ice40,techlibs/ice40/abc_hx.box))
$(eval $(call add_share_file,share/ice40,techlibs/ice40/abc_hx.lut))
$(eval $(call add_share_file,share/ice40,techlibs/ice40/abc_lp.box))

34
techlibs/ice40/dsp_map.v Normal file
View file

@ -0,0 +1,34 @@
module \$__MUL16X16 (input [15:0] A, input [15:0] B, output [31:0] Y);
parameter A_SIGNED = 0;
parameter B_SIGNED = 0;
parameter A_WIDTH = 0;
parameter B_WIDTH = 0;
parameter Y_WIDTH = 0;
SB_MAC16 #(
.NEG_TRIGGER(1'b0),
.C_REG(1'b0),
.A_REG(1'b0),
.B_REG(1'b0),
.D_REG(1'b0),
.TOP_8x8_MULT_REG(1'b0),
.BOT_8x8_MULT_REG(1'b0),
.PIPELINE_16x16_MULT_REG1(1'b0),
.PIPELINE_16x16_MULT_REG2(1'b0),
.TOPOUTPUT_SELECT(2'b11),
.TOPADDSUB_LOWERINPUT(2'b0),
.TOPADDSUB_UPPERINPUT(1'b0),
.TOPADDSUB_CARRYSELECT(2'b0),
.BOTOUTPUT_SELECT(2'b11),
.BOTADDSUB_LOWERINPUT(2'b0),
.BOTADDSUB_UPPERINPUT(1'b0),
.BOTADDSUB_CARRYSELECT(2'b0),
.MODE_8x8(1'b0),
.A_SIGNED(A_SIGNED),
.B_SIGNED(B_SIGNED)
) _TECHMAP_REPLACE_ (
.A(A),
.B(B),
.O(Y),
);
endmodule

2
techlibs/ice40/synth_ice40.cc
View file

@ -266,7 +266,7 @@ struct SynthIce40Pass : public ScriptPass
run("opt_expr");
run("opt_clean");
if (help_mode || dsp) {
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=$__MUL16X16", "(if -dsp)");
run("techmap -map +/mul2dsp.v -map +/ice40/dsp_map.v -D DSP_A_MAXWIDTH=16 -D DSP_B_MAXWIDTH=16 -D DSP_A_MINWIDTH=2 -D DSP_B_MINWIDTH=2 -D DSP_Y_MINWIDTH=11 -D DSP_NAME=$__MUL16X16", "(if -dsp)");
run("opt_expr -fine", " (if -dsp)");
run("ice40_dsp", " (if -dsp)");
run("chtype -set $mul t:$__soft_mul","(if -dsp)");