From: "Zhao, Weiming" <weimingz@codeaurora.org>
To: musl@lists.openwall.com
Subject: clz instruction is unavailable for Thumb1
Date: Tue, 27 Feb 2018 16:03:19 -0800 [thread overview]
Message-ID: <1799b81c-10d6-c2ac-4411-6ee9808f2356@codeaurora.org> (raw)
In arch/arm/atomic_arch.h, it checks for __ARM_ARCH >= 5, which is not
sufficient.
for example, for armv6-m, it only support Thumb1, which doesn't include clz.
Suggest to check if it's building for thumb1:
diff --git a/arch/arm/atomic_arch.h b/arch/arm/atomic_arch.h
index c5c56f8..e3cb66a 100644
--- a/arch/arm/atomic_arch.h
+++ b/arch/arm/atomic_arch.h
@@ -82,7 +82,7 @@ static inline void a_crash()
: : : "memory");
}
-#if __ARM_ARCH >= 5
+#if __ARM_ARCH >= 5 && !(defined(__thumb__) && !defined(__thumb2))
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
next reply other threads:[~2018-02-28 0:03 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-28 0:03 Zhao, Weiming [this message]
2018-02-28 0:37 ` Andre McCurdy
2018-02-28 1:01 ` Rich Felker
2018-02-28 1:26 ` Andre McCurdy
2018-02-28 2:16 ` Rich Felker
2018-02-28 3:00 ` Andre McCurdy
2018-02-28 10:43 ` Szabolcs Nagy
2018-02-28 3:56 ` Khem Raj
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