X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=includes%2FCmm.h;h=0088c1aa05d9419221079ea6fea772ad790713e2;hb=75fea0db6f7d187aea994485a9b85c4d2b44fb83;hp=183e10394f5db356ad89e0c454244776fe0d947c;hpb=70a2431f90fa932733ce015714ef7848640ed48f;p=ghc-hetmet.git

diff --git a/includes/Cmm.h b/includes/Cmm.h
index 183e103..0088c1a 100644
--- a/includes/Cmm.h
+++ b/includes/Cmm.h
@@ -169,7 +169,7 @@
 #if SIZEOF_W == 4
 #define W_SHIFT 2
 #elif SIZEOF_W == 8
-#define W_SHIFT 4
+#define W_SHIFT 3
 #endif
 
 /* Converting quantities of words to bytes */
@@ -413,6 +413,9 @@
 /* The offset of the payload of an array */
 #define BYTE_ARR_CTS(arr)  ((arr) + SIZEOF_StgArrWords)
 
+/* The number of words allocated in an array payload */
+#define BYTE_ARR_WDS(arr) ROUNDUP_BYTES_TO_WDS(StgArrWords_bytes(arr))
+
 /* Getting/setting the info pointer of a closure */
 #define SET_INFO(p,info) StgHeader_info(p) = info
 #define GET_INFO(p) StgHeader_info(p)