1 files changed, 4 insertions, 2 deletions

diff --git a/apps/codecs/Tremor/mdct_lookup.h b/apps/codecs/Tremor/mdct_lookup.h
index 970e199f7f..8a88997376 100644
--- a/apps/codecs/Tremor/mdct_lookup.h
+++ b/apps/codecs/Tremor/mdct_lookup.h
@@ -17,8 +17,10 @@
   
 #include "os_types.h"
 
+/* keep lookup tables in fast IRAM */
+
 /* {sin(2*i*PI/4096), cos(2*i*PI/4096)}, with i = 0 to 512 */
-static LOOKUP_T sincos_lookup0[1026] = {
+static LOOKUP_T sincos_lookup0[1026] IDATA_ATTR = {
   X(0x00000000), X(0x7fffffff), X(0x003243f5), X(0x7ffff621),
   X(0x006487e3), X(0x7fffd886), X(0x0096cbc1), X(0x7fffa72c),
   X(0x00c90f88), X(0x7fff6216), X(0x00fb5330), X(0x7fff0943),
@@ -279,7 +281,7 @@ static LOOKUP_T sincos_lookup0[1026] = {
   };
   
   /* {sin((2*i+1)*PI/4096), cos((2*i+1)*PI/4096)}, with i = 0 to 511 */
-static LOOKUP_T sincos_lookup1[1024] = {
+static LOOKUP_T sincos_lookup1[1024] IDATA_ATTR = {
   X(0x001921fb), X(0x7ffffd88), X(0x004b65ee), X(0x7fffe9cb),
   X(0x007da9d4), X(0x7fffc251), X(0x00afeda8), X(0x7fff8719),
   X(0x00e23160), X(0x7fff3824), X(0x011474f6), X(0x7ffed572),