1 files changed, 49 insertions, 0 deletions
diff --git a/vere/pkg/noun/jets/e/mat.c b/vere/pkg/noun/jets/e/mat.c
new file mode 100644
index 0000000..89de386
--- /dev/null
+++ b/vere/pkg/noun/jets/e/mat.c
@@ -0,0 +1,49 @@
+ /// @file
+
+#include "jets/q.h"
+#include "jets/w.h"
+
+#include "noun.h"
+
+  u3_noun
+  u3qe_mat(u3_atom a)
+  {
+    if ( 0 == a ) {
+      return u3nc(1, 1);
+    } else {
+      u3_atom b = u3qc_met(0, a);
+      u3_atom c = u3qc_met(0, b);
+      u3_atom u, v, w, x, y, z;
+      u3_atom p, q;
+
+      u = u3qa_dec(c);
+      v = u3qa_add(c, c);
+      w = u3qc_bex(c);
+      x = u3qc_end(0, u, b);
+      y = u3qc_lsh(0, u, a);
+      z = u3qc_mix(x, y);
+
+      p = u3qa_add(v, b);
+      q = u3qc_cat(0, w, z);
+
+      u3z(u);
+      u3z(v);
+      u3z(w);
+      u3z(x);
+      u3z(y);
+      u3z(z);
+
+      return u3nc(p, q);
+    }
+  }
+  u3_noun
+  u3we_mat(u3_noun cor)
+  {
+    u3_noun a;
+
+    if ( (u3_none == (a = u3r_at(u3x_sam, cor))) ) {
+      return u3m_bail(c3__fail);
+    } else {
+      return u3qe_mat(a);
+    }
+  }