Add a combinational constant multiplication primitive (#1992)

calyxir · Mar 31, 2024 · 2423515 · 2423515
1 parent 6be8d86
commit 2423515
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diff --git a/primitives/binary_operators.futil b/primitives/binary_operators.futil
@@ -145,4 +145,5 @@ extern "binary_operators.sv" {
   comb primitive std_slsh<"share"=1>[WIDTH](@data left: WIDTH, @data right: WIDTH) -> (out: WIDTH);
   comb primitive std_srsh<"share"=1>[WIDTH](@data left: WIDTH, @data right: WIDTH) -> (out: WIDTH);
   comb primitive std_signext<"share"=1>[IN_WIDTH, OUT_WIDTH](@data in: IN_WIDTH) -> (out: OUT_WIDTH);
+  comb primitive std_const_mult<"share"=1>[WIDTH, VALUE](@data in: WIDTH) -> (out: WIDTH);
 }
diff --git a/primitives/binary_operators.sv b/primitives/binary_operators.sv
@@ -763,3 +763,13 @@ module std_signext #(
     end
   `endif
 endmodule
+
+module std_const_mult #(
+    parameter WIDTH = 32,
+    parameter VALUE = 1
+) (
+    input  signed [WIDTH-1:0] in,
+    output signed [WIDTH-1:0] out
+);
+  assign out = in * VALUE;
+endmodule