rtl/fpu: initial commit

Imported from https://github.com/taneroksuz/fpu-sp

1 files changed, 33 insertions, 0 deletions

diff --git a/rtl/fpu/lzc/lzc_4.sv b/rtl/fpu/lzc/lzc_4.sv
new file mode 100644
index 0000000..0d5182c
--- /dev/null
+++ b/rtl/fpu/lzc/lzc_4.sv
@@ -0,0 +1,33 @@
+module lzc_4 (
+    input [3:0] a,
+    output [1:0] c,
+    output v
+);
+
+  logic a0;
+  logic a1;
+  logic a2;
+  logic a3;
+
+  logic s0;
+  logic s1;
+  logic s2;
+  logic s3;
+  logic s4;
+
+  assign a0 = a[0];
+  assign a1 = a[1];
+  assign a2 = a[2];
+  assign a3 = a[3];
+
+  assign s0 = a3 | a2;
+  assign s1 = a1 | a0;
+  assign s2 = s1 | s0;
+  assign s3 = (~s0) & a1;
+  assign s4 = a3 | s3;
+
+  assign v = s2;
+  assign c[0] = s4;
+  assign c[1] = s0;
+
+endmodule