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From: Dimitry Andric <dim@FreeBSD.org>
Date: Fri, 29 Dec 2017 12:49:24 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-projects@freebsd.org
Subject: svn commit: r327340 - projects/clang600-import/sys/crypto/via
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Author: dim
Date: Fri Dec 29 12:49:24 2017
New Revision: 327340
URL: https://svnweb.freebsd.org/changeset/base/327340

Log:
  Work around a clang 6.0.0 issue with rep prefixes followed by .byte
  directives (as reported in https://bugs.llvm.org/show_bug.cgi?id=35749),
  by defining the rep prefix with yet another .byte directive.
  
  This is a temporary fix, to be reverted before merging back to head,
  until upstream has a proper fix for this.

Modified:
  projects/clang600-import/sys/crypto/via/padlock_cipher.c

Modified: projects/clang600-import/sys/crypto/via/padlock_cipher.c
==============================================================================
--- projects/clang600-import/sys/crypto/via/padlock_cipher.c	Fri Dec 29 12:48:19 2017	(r327339)
+++ projects/clang600-import/sys/crypto/via/padlock_cipher.c	Fri Dec 29 12:49:24 2017	(r327340)
@@ -88,7 +88,7 @@ padlock_cbc(void *in, void *out, size_t count, void *k
 	__asm __volatile(
 		"pushf				\n\t"
 		"popf				\n\t"
-		"rep				\n\t"
+		".byte	0xf3			\n\t"
 		".byte	0x0f, 0xa7, 0xd0"
 			: "+a" (iv), "+c" (count), "+D" (out), "+S" (in)
 			: "b" (key), "d" (cw)