From 0febcde46a85855a3f3ec1bf872a2259b207efce Mon Sep 17 00:00:00 2001 From: "Luke T. Shumaker" Date: Thu, 20 Feb 2025 22:12:09 -0700 Subject: libmisc: macro.h: Fix LM_NEXT_POWER_OF_2(0) Apparently __builtin_clzll(0) is undefined. --- libmisc/include/libmisc/macro.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'libmisc') diff --git a/libmisc/include/libmisc/macro.h b/libmisc/include/libmisc/macro.h index d11b99f..fe61410 100644 --- a/libmisc/include/libmisc/macro.h +++ b/libmisc/include/libmisc/macro.h @@ -19,7 +19,7 @@ #define LM_ARRAY_LEN(ary) (sizeof(ary)/sizeof((ary)[0])) #define LM_CEILDIV(n, d) ( ((n)+(d)-1) / (d) ) #define LM_ROUND_UP(n, d) ( LM_CEILDIV(n, d) * (d) ) /** Return `n` rounded up to the nearest multiple of `d` */ -#define LM_NEXT_POWER_OF_2(x) ((1ULL)<<((sizeof(unsigned long long)*8)-__builtin_clzll(x))) +#define LM_NEXT_POWER_OF_2(x) ( (x) ? 1ULL<<((sizeof(unsigned long long)*8)-__builtin_clzll(x)) : 1) /* strings */ -- cgit v1.2.3-2-g168b