1 files changed, 69 insertions, 0 deletions
diff --git a/rtl/fpu/lzc/lzc_256.sv b/rtl/fpu/lzc/lzc_256.sv
new file mode 100644
index 0000000..cb4ded6
--- /dev/null
+++ b/rtl/fpu/lzc/lzc_256.sv
@@ -0,0 +1,69 @@
+module lzc_256 (
+    input [255:0] a,
+    output [7:0] c,
+    output v
+);
+
+  logic [6:0] z0;
+  logic [6:0] z1;
+
+  logic v0;
+  logic v1;
+
+  logic s0;
+  logic s1;
+  logic s2;
+  logic s3;
+  logic s4;
+  logic s5;
+  logic s6;
+  logic s7;
+  logic s8;
+  logic s9;
+  logic s10;
+  logic s11;
+  logic s12;
+  logic s13;
+  logic s14;
+  logic s15;
+  logic s16;
+
+  lzc_128 lzc_128_comp_0 (
+      .a(a[127:0]),
+      .c(z0),
+      .v(v0)
+  );
+
+  lzc_128 lzc_128_comp_1 (
+      .a(a[255:128]),
+      .c(z1),
+      .v(v1)
+  );
+
+  assign s0 = v1 | v0;
+  assign s1 = (~v1) & z0[0];
+  assign s2 = z1[0] | s1;
+  assign s3 = (~v1) & z0[1];
+  assign s4 = z1[1] | s3;
+  assign s5 = (~v1) & z0[2];
+  assign s6 = z1[2] | s5;
+  assign s7 = (~v1) & z0[3];
+  assign s8 = z1[3] | s7;
+  assign s9 = (~v1) & z0[4];
+  assign s10 = z1[4] | s9;
+  assign s11 = (~v1) & z0[5];
+  assign s12 = z1[5] | s11;
+  assign s13 = (~v1) & z0[6];
+  assign s14 = z1[6] | s13;
+
+  assign v = s0;
+  assign c[0] = s2;
+  assign c[1] = s4;
+  assign c[2] = s6;
+  assign c[3] = s8;
+  assign c[4] = s10;
+  assign c[5] = s12;
+  assign c[6] = s14;
+  assign c[7] = v1;
+
+endmodule