X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=include%2Fwimlib%2Fcompiler.h;h=6bce5d0152e11742905461df5d1b6fcc1b71411d;hp=a43bb769fdce9c752e3a75920c6ce48744133579;hb=8618172276fae088f311923a61bbf26c3d4d8941;hpb=eb3e3b72db23ecaa7789a807afeb9577962653fe;ds=sidebyside

diff --git a/include/wimlib/compiler.h b/include/wimlib/compiler.h
index a43bb769..6bce5d01 100644
--- a/include/wimlib/compiler.h
+++ b/include/wimlib/compiler.h
@@ -171,10 +171,10 @@
 #endif
 
 /* (Optional) Find Last Set bit and Find First Set bit macros.  */
-#define compiler_fls32(n)	(31 - __builtin_clz(n))
-#define compiler_fls64(n)	(63 - __builtin_clzll(n))
-#define compiler_ffs32(n)	__builtin_ctz(n)
-#define compiler_ffs64(n)	__builtin_ctzll(n)
+#define compiler_bsr32(n)	(31 - __builtin_clz(n))
+#define compiler_bsr64(n)	(63 - __builtin_clzll(n))
+#define compiler_bsf32(n)	__builtin_ctz(n)
+#define compiler_bsf64(n)	__builtin_ctzll(n)
 
 /* Optional definitions for checking with 'sparse'.  */
 #ifdef __CHECKER__
@@ -192,6 +192,10 @@
 #  define STATIC_ASSERT(expr)	((void)sizeof(char[1 - 2 * !(expr)]))
 #endif
 
+/* STATIC_ASSERT_ZERO() - verify the truth of an expression at compilation time
+ * and also produce a result of value '0' to be used in constant expressions */
+#define STATIC_ASSERT_ZERO(expr) ((int)sizeof(char[-!(expr)]))
+
 #define CONCAT_IMPL(s1, s2)	s1##s2
 
 /* CONCAT() - concatenate two tokens at preprocessing time.  */