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intel_alm: Add multiply signedness to cells

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Quartus assumes unsigned multiplication by default, breaking signed
multiplies, so add an input signedness parameter to the MISTRAL_MUL*
cells to propagate to Quartus' <family>_mac cells.
This commit is contained in:
Dan Ravensloft 2020-08-26 18:44:48 +01:00 • committed by Marcelina Kościelnicka
parent 4f2b78e19a
commit 1a07b330f8
7 changed files with 147 additions and 16 deletions
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7
tests/arch/common/mul.v
View file

@ -1,9 +1,10 @@
module top
#(parameter X_WIDTH=6, Y_WIDTH=6, A_WIDTH=12)
(
input [5:0] x,
input [5:0] y,
input [X_WIDTH-1:0] x,
input [Y_WIDTH-1:0] y,
output [11:0] A,
output [A_WIDTH-1:0] A,
);
assign A = x * y;
endmodule

43
tests/arch/intel_alm/mul.ys
View file

@ -1,23 +1,60 @@
read_verilog ../common/mul.v
chparam -set X_WIDTH 8 -set Y_WIDTH 8 -set A_WIDTH 16
hierarchy -top top
proc
equiv_opt -assert -map +/intel_alm/common/dsp_sim.v synth_intel_alm -family cyclonev # equivalency check
design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
cd top # Constrain all select calls below inside the top module
stat
select -assert-count 1 t:MISTRAL_MUL9X9
select -assert-none t:MISTRAL_MUL9X9 %% t:* %D
# Cyclone 10 GX does not have 9x9 multipliers.
design -reset
read_verilog ../common/mul.v
chparam -set X_WIDTH 17 -set Y_WIDTH 17 -set A_WIDTH 34
hierarchy -top top
proc
equiv_opt -assert -map +/intel_alm/common/dsp_sim.v synth_intel_alm -family cyclonev # equivalency check
design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
cd top # Constrain all select calls below inside the top module
select -assert-count 1 t:MISTRAL_MUL18X18
select -assert-none t:MISTRAL_MUL18X18 %% t:* %D
design -reset
read_verilog ../common/mul.v
chparam -set X_WIDTH 17 -set Y_WIDTH 17 -set A_WIDTH 34
hierarchy -top top
proc
equiv_opt -assert -map +/intel_alm/common/dsp_sim.v synth_intel_alm -family cyclone10gx # equivalency check
design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
cd top # Constrain all select calls below inside the top module
# Cyclone 10 GX does not have 9x9 multipliers, so we use 18x18.
select -assert-count 1 t:MISTRAL_MUL18X18
select -assert-none t:MISTRAL_MUL18X18 %% t:* %D
design -reset
read_verilog ../common/mul.v
chparam -set X_WIDTH 26 -set Y_WIDTH 26 -set A_WIDTH 52
hierarchy -top top
proc
equiv_opt -assert -map +/intel_alm/common/dsp_sim.v synth_intel_alm -family cyclonev # equivalency check
design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
cd top # Constrain all select calls below inside the top module
select -assert-count 1 t:MISTRAL_MUL27X27
select -assert-none t:MISTRAL_MUL27X27 %% t:* %D
design -reset
read_verilog ../common/mul.v
chparam -set X_WIDTH 26 -set Y_WIDTH 26 -set A_WIDTH 52
hierarchy -top top
proc
equiv_opt -assert -map +/intel_alm/common/dsp_sim.v synth_intel_alm -family cyclone10gx # equivalency check
design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
cd top # Constrain all select calls below inside the top module
select -assert-count 1 t:MISTRAL_MUL27X27
select -assert-none t:MISTRAL_MUL27X27 %% t:* %D