From: Arnd Bergmann <arnd@arndb.de>
To: Herbert Xu <herbert@gondor.apana.org.au>,
"David S. Miller" <davem@davemloft.net>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org, Tim Chen <tim.c.chen@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>, "H. Peter Anvin" <hpa@zytor.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Josh Poimboeuf <jpoimboe@redhat.com>, Jiri Slaby <jslaby@suse.cz>,
Peter Zijlstra <peterz@infradead.org>,
linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
clang-built-linux@googlegroups.com
Subject: [PATCH] x86: crypto: fix building crc32c with clang ias
Date: Wed, 27 May 2020 16:17:40 +0200 [thread overview]
Message-ID: <20200527141754.1850968-1-arnd@arndb.de> (raw)
The clang integrated assembler complains about movzxw:
arch/x86/crypto/crc32c-pcl-intel-asm_64.S:173:2: error: invalid instruction mnemonic 'movzxw'
It seems that movzwq is the mnemonic that it expects instead,
and this is what objdump prints when disassembling the file.
Fixes: 6a8ce1ef3940 ("crypto: crc32c - Optimize CRC32C calculation with PCLMULQDQ instruction")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
arch/x86/crypto/crc32c-pcl-intel-asm_64.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/crypto/crc32c-pcl-intel-asm_64.S b/arch/x86/crypto/crc32c-pcl-intel-asm_64.S
index 8501ec4532f4..442599cbe796 100644
--- a/arch/x86/crypto/crc32c-pcl-intel-asm_64.S
+++ b/arch/x86/crypto/crc32c-pcl-intel-asm_64.S
@@ -170,7 +170,7 @@ continue_block:
## branch into array
lea jump_table(%rip), %bufp
- movzxw (%bufp, %rax, 2), len
+ movzwq (%bufp, %rax, 2), len
lea crc_array(%rip), %bufp
lea (%bufp, len, 1), %bufp
JMP_NOSPEC bufp
--
2.26.2
next reply other threads:[~2020-05-27 14:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-27 14:17 Arnd Bergmann [this message]
2020-05-27 16:42 ` [PATCH] x86: crypto: fix building crc32c with clang ias Nathan Chancellor
2020-05-27 18:24 ` Arnd Bergmann
2020-05-27 19:34 ` Nathan Chancellor
2020-07-23 7:56 ` Herbert Xu
2020-07-23 8:18 ` Sedat Dilek
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