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picosoc: enable fast multiply option for icebreaker 

This patch splits the picosoc's `ENABLE_MULDIV` paramter
into `ENABLE_MUL`, `ENABLE_DIV` and `ENABLE_FAST_MUL`,
and also enables the DSP-based fast multiplier for
the iCE40up5k icebreaker board.

Signed-off-by: Trammell Hudson <hudson@trmm.net>
This commit is contained in:
Trammell Hudson 2021-09-02 16:35:38 +00:00
parent f9b1beb4cf
commit eeca10190b
3 changed files with 11 additions and 6 deletions
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4
picosoc/Makefile
View File

@ -57,7 +57,7 @@ icebsynsim: icebreaker_syn_tb.vvp icebreaker_fw.hex
vvp -N $< +firmware=icebreaker_fw.hex
icebreaker.json: icebreaker.v ice40up5k_spram.v spimemio.v simpleuart.v picosoc.v ../picorv32.v
yosys -ql icebreaker.log -p 'synth_ice40 -top icebreaker -json icebreaker.json' $^
yosys -ql icebreaker.log -p 'synth_ice40 -dsp -top icebreaker -json icebreaker.json' $^
icebreaker_tb.vvp: icebreaker_tb.v icebreaker.v ice40up5k_spram.v spimemio.v simpleuart.v picosoc.v ../picorv32.v spiflash.v
iverilog -s testbench -o $@ $^ `yosys-config --datdir/ice40/cells_sim.v`
@ -69,7 +69,7 @@ icebreaker_syn.v: icebreaker.json
yosys -p 'read_json icebreaker.json; write_verilog icebreaker_syn.v'
icebreaker.asc: icebreaker.pcf icebreaker.json
nextpnr-ice40 --freq 13 --up5k --asc icebreaker.asc --pcf icebreaker.pcf --json icebreaker.json
nextpnr-ice40 --freq 13 --up5k --package sg48 --asc icebreaker.asc --pcf icebreaker.pcf --json icebreaker.json
icebreaker.bin: icebreaker.asc
icetime -d up5k -c 12 -mtr icebreaker.rpt icebreaker.asc

4
picosoc/icebreaker.v
View File

@ -108,7 +108,9 @@ module icebreaker (
picosoc #(
.BARREL_SHIFTER(0),
.ENABLE_MULDIV(0),
.ENABLE_MUL(0),
.ENABLE_DIV(0),
.ENABLE_FAST_MUL(1),
.MEM_WORDS(MEM_WORDS)
) soc (
.clk (clk ),

9
picosoc/picosoc.v
View File

@ -70,7 +70,9 @@ module picosoc (
input flash_io3_di
);
parameter [0:0] BARREL_SHIFTER = 1;
parameter [0:0] ENABLE_MULDIV = 1;
parameter [0:0] ENABLE_MUL = 1;
parameter [0:0] ENABLE_DIV = 1;
parameter [0:0] ENABLE_FAST_MUL = 0;
parameter [0:0] ENABLE_COMPRESSED = 1;
parameter [0:0] ENABLE_COUNTERS = 1;
parameter [0:0] ENABLE_IRQ_QREGS = 0;
@ -136,8 +138,9 @@ module picosoc (
.BARREL_SHIFTER(BARREL_SHIFTER),
.COMPRESSED_ISA(ENABLE_COMPRESSED),
.ENABLE_COUNTERS(ENABLE_COUNTERS),
.ENABLE_MUL(ENABLE_MULDIV),
.ENABLE_DIV(ENABLE_MULDIV),
.ENABLE_MUL(ENABLE_MUL),
.ENABLE_DIV(ENABLE_DIV),
.ENABLE_FAST_MUL(ENABLE_FAST_MUL),
.ENABLE_IRQ(1),
.ENABLE_IRQ_QREGS(ENABLE_IRQ_QREGS)
) cpu (