X-Git-Url: https://wimlib.net/git/?a=blobdiff_plain;f=include%2Fwimlib%2Flzx.h;h=539edf303591eb168c53820486b7f7e794f3abea;hb=919b97754cedca6f37dd1808b00198dc3cb8bf98;hp=1f4c1e3f9b77b5acf202dc40b6e2334fca67d2d0;hpb=2fdc3bd720f5bc49680dc2284ea42a537d1acc07;p=wimlib

diff --git a/include/wimlib/lzx.h b/include/wimlib/lzx.h
index 1f4c1e3f..539edf30 100644
--- a/include/wimlib/lzx.h
+++ b/include/wimlib/lzx.h
@@ -6,6 +6,7 @@
  * */
 
 #include "wimlib/assert.h"
+#include "wimlib/compiler.h"
 #include "wimlib/util.h"
 #include "wimlib/types.h"
 
@@ -122,7 +123,7 @@ extern const u32 lzx_position_base[LZX_MAX_POSITION_SLOTS];
  * the formatted offset without actually looking at the array.
  */
 static inline unsigned
-lzx_get_position_slot_raw(unsigned formatted_offset)
+lzx_get_position_slot_raw(u32 formatted_offset)
 {
 	if (formatted_offset >= 196608) {
 		return (formatted_offset >> 17) + 34;
@@ -142,7 +143,13 @@ extern unsigned lzx_get_num_main_syms(u32 window_size);
 /* Least-recently used queue for match offsets.  */
 struct lzx_lru_queue {
 	u32 R[LZX_NUM_RECENT_OFFSETS];
-};
+}
+#ifdef __x86_64__
+_aligned_attribute(8)  /* Improves performance of LZX compression by 1% - 2%;
+			  specifically, this speeds up
+			  lzx_choose_near_optimal_match().  */
+#endif
+;
 
 /* In the LZX format, an offset of n bytes is actually encoded
  * as (n + LZX_OFFSET_OFFSET).  */
@@ -157,4 +164,10 @@ lzx_lru_queue_init(struct lzx_lru_queue *queue)
 		queue->R[i] = 1;
 }
 
+extern void
+lzx_do_e8_preprocessing(u8 *data, s32 size);
+
+extern void
+lzx_undo_e8_preprocessing(u8 *data, s32 size);
+
 #endif /* _WIMLIB_LZX_H */