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-rw-r--r--src/common/tuklib_integer.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/common/tuklib_integer.h b/src/common/tuklib_integer.h
index aee1ad0d..24d9efb1 100644
--- a/src/common/tuklib_integer.h
+++ b/src/common/tuklib_integer.h
@@ -742,10 +742,10 @@ ctz32(uint32_t n)
#if defined(__INTEL_COMPILER)
return _bit_scan_forward(n);
-#elif TUKLIB_GNUC_REQ(3, 4) && UINT_MAX >= UINT32_MAX
+#elif (TUKLIB_GNUC_REQ(3, 4) || defined(__clang__)) && UINT_MAX >= UINT32_MAX
return (uint32_t)__builtin_ctz(n);
-#elif (TUKLIB_GNUC_REQ(3, 4) || defined(__clang__)) && UINT_MAX == UINT32_MAX
+#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
uint32_t i;
__asm__("bsfl %1, %0" : "=r" (i) : "rm" (n));
return i;