Moved eel and eapml under the contrib folder.

contrib/ise_library/math/eapml/bit_scan_gcc/limb_bit_scanning.e

@@ -0,0 +1,59 @@
+note
+	description: "Summary description for {LIMB_BIT_SCANNING}."
+	author: ""
+	date: "$Date$"
+	revision: "$Revision$"
+
+deferred class
+	LIMB_BIT_SCANNING
+
+inherit
+	LIMB_DEFINITION
+
+feature
+
+	leading_zeros (limb_a: NATURAL_32): INTEGER
+		do
+			if limb_a = 0 then
+				Result := limb_bits
+			else
+				Result := count_leading_zeros (limb_a)
+			end
+		end
+
+	most_significant_one (limb_a: NATURAL_32): INTEGER
+			-- 31 high, 0 low
+		require
+			limb_a /= 0
+		do
+			Result := limb_high_bit - leading_zeros (limb_a)
+		end
+
+	trailing_zeros (limb_a: NATURAL_32): INTEGER
+			-- 31 high, 0 low
+		require
+			limb_a /= 0
+		do
+			Result := count_trailing_zeros (limb_a)
+		end
+
+feature {NONE} -- Implementation
+
+	count_trailing_zeros (limb_a: NATURAL_32): INTEGER
+		external
+			"C inline"
+		alias
+			"[
+				return __builtin_ctz ($limb_a);
+			]"
+		end
+
+	count_leading_zeros (limb_a: NATURAL_32): INTEGER
+		external
+			"C inline"
+		alias
+			"[
+				return __builtin_clz ($limb_a);
+			]"
+		end
+end