diff options
Diffstat (limited to 'techlibs/ice40')
| -rw-r--r-- | techlibs/ice40/Makefile.inc | 1 | ||||
| -rw-r--r-- | techlibs/ice40/dsp_map.v | 34 | ||||
| -rw-r--r-- | techlibs/ice40/synth_ice40.cc | 14 |
3 files changed, 47 insertions, 2 deletions
diff --git a/techlibs/ice40/Makefile.inc b/techlibs/ice40/Makefile.inc index 76a89b107..92a9956ea 100644 --- a/techlibs/ice40/Makefile.inc +++ b/techlibs/ice40/Makefile.inc @@ -27,6 +27,7 @@ $(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 $(call add_share_file,share/ice40,techlibs/ice40/abc_lp.box)) diff --git a/techlibs/ice40/dsp_map.v b/techlibs/ice40/dsp_map.v new file mode 100644 index 000000000..06fa73956 --- /dev/null +++ b/techlibs/ice40/dsp_map.v @@ -0,0 +1,34 @@ +module \$__MUL16X16 (input [15:0] A, input [15:0] B, output [31:0] Y); + parameter A_SIGNED = 0; + parameter B_SIGNED = 0; + parameter A_WIDTH = 0; + parameter B_WIDTH = 0; + parameter Y_WIDTH = 0; + + SB_MAC16 #( + .NEG_TRIGGER(1'b0), + .C_REG(1'b0), + .A_REG(1'b0), + .B_REG(1'b0), + .D_REG(1'b0), + .TOP_8x8_MULT_REG(1'b0), + .BOT_8x8_MULT_REG(1'b0), + .PIPELINE_16x16_MULT_REG1(1'b0), + .PIPELINE_16x16_MULT_REG2(1'b0), + .TOPOUTPUT_SELECT(2'b11), + .TOPADDSUB_LOWERINPUT(2'b0), + .TOPADDSUB_UPPERINPUT(1'b0), + .TOPADDSUB_CARRYSELECT(2'b0), + .BOTOUTPUT_SELECT(2'b11), + .BOTADDSUB_LOWERINPUT(2'b0), + .BOTADDSUB_UPPERINPUT(1'b0), + .BOTADDSUB_CARRYSELECT(2'b0), + .MODE_8x8(1'b0), + .A_SIGNED(A_SIGNED), + .B_SIGNED(B_SIGNED) + ) _TECHMAP_REPLACE_ ( + .A(A), + .B(B), + .O(Y), + ); +endmodule diff --git a/techlibs/ice40/synth_ice40.cc b/techlibs/ice40/synth_ice40.cc index a3890268a..841f10244 100644 --- a/techlibs/ice40/synth_ice40.cc +++ b/techlibs/ice40/synth_ice40.cc @@ -272,8 +272,18 @@ struct SynthIce40Pass : public ScriptPass run("techmap -map +/cmp2lut.v -D LUT_WIDTH=4"); run("opt_expr"); run("opt_clean"); - if (help_mode || dsp) - run("ice40_dsp", "(if -dsp)"); + if (help_mode || dsp) { + run("techmap -map +/mul2dsp.v -map +/ice40/dsp_map.v -D DSP_A_MAXWIDTH=16 -D DSP_B_MAXWIDTH=16 " + "-D DSP_A_MINWIDTH=2 -D DSP_B_MINWIDTH=2 -D DSP_Y_MINWIDTH=11 " + "-D DSP_NAME=$__MUL16X16", "(if -dsp)"); + run("select a:mul2dsp", " (if -dsp)"); + run("setattr -unset mul2dsp", " (if -dsp)"); + run("opt_expr -fine", " (if -dsp)"); + run("wreduce", " (if -dsp)"); + run("select -clear", " (if -dsp)"); + run("ice40_dsp", " (if -dsp)"); + run("chtype -set $mul t:$__soft_mul", "(if -dsp)"); + } run("alumacc"); run("opt"); run("fsm"); |