diff --git a/lib/CPUs/MIPS/src/core/dcache.vhd b/lib/CPUs/MIPS/src/core/dcache.vhd
index a135bee..5731416 100644
--- a/lib/CPUs/MIPS/src/core/dcache.vhd
+++ b/lib/CPUs/MIPS/src/core/dcache.vhd
@@ -1,7 +1,6 @@
 LIBRARY IEEE;
 USE IEEE.STD_LOGIC_1164.ALL;
 USE IEEE.NUMERIC_STD.ALL;
-use IEEE.MATH_REAL.ALL;
 
 library work;
 use work.mips_types.all;
@@ -77,17 +76,6 @@ COMPONENT dpram_2w2r is
 	);
 END COMPONENT;
 
-	function lg2(x : natural) return natural is
-	begin
-		return natural(ceil(log2(real(x))));
-	end lg2;	
-	
-	function po2(x : natural) return natural is
-	begin
-
-		return 2**lg2(x);
-	end po2;	
-
 	constant word_index_width	: natural := lg2(line_size);
 	constant cache_index_width	: natural := lg2(cache_size) - word_index_width;
 	constant tag_width			: natural := 32 - word_index_width - cache_index_width - 2;
diff --git a/lib/CPUs/MIPS/src/core/icache.vhd b/lib/CPUs/MIPS/src/core/icache.vhd
index 258c687..7511525 100644
--- a/lib/CPUs/MIPS/src/core/icache.vhd
+++ b/lib/CPUs/MIPS/src/core/icache.vhd
@@ -1,7 +1,6 @@
 LIBRARY IEEE;
 USE IEEE.STD_LOGIC_1164.ALL;
 USE IEEE.NUMERIC_STD.ALL;
-use IEEE.MATH_REAL.ALL;
 
 library work;
 use work.mips_types.all;
@@ -51,17 +50,6 @@ COMPONENT dpram_1w1r
 	);
 END COMPONENT;
 
-	function lg2(x : natural) return natural is
-	begin
-		return natural(ceil(log2(real(x))));
-	end lg2;	
-	
-	function po2(x : natural) return natural is
-	begin
-
-		return 2**lg2(x);
-	end po2;	
-
 	constant word_index_width	: natural := lg2(line_size);
 	constant cache_index_width	: natural := lg2(cache_size) - word_index_width;
 	constant tag_width			: natural := 32 - word_index_width - cache_index_width - 2;