From d7320ca3ed10f0d35b3740fa03341161e74275ea Mon Sep 17 00:00:00 2001 From: Martin Storsjö Date: Tue, 9 May 2017 10:25:44 +0300 Subject: arm: Avoid using .dn register aliases MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit clang now (in the upcoming 5.0 version) is capable of building our arm assembly without relying on gas-preprocessor, although clang/LLVM doesn't support .dn register aliases. The VC1 MC assembly was only built and used if the chosen assembler supported the .dn directives though. This was supported as long as gas-preprocessor was used. This means that VC1 decoding got a speed regression on clang 5.0, unless the user manually chose using gas-preprocessor again. By avoiding using the .dn register aliases, we can build the VC1 MC assembly with the latest clang version. Support for the .dn/.qn directives in clang/LLVM isn't actively planned, see https://bugs.llvm.org/show_bug.cgi?id=18199. This partially reverts 896a5bff64264f4d01ed98eacc97a67260c1e17e. Signed-off-by: Martin Storsjö --- configure | 5 ----- 1 file changed, 5 deletions(-) (limited to 'configure') diff --git a/configure b/configure index d70e61593a..d6c44cf89e 100755 --- a/configure +++ b/configure @@ -1662,7 +1662,6 @@ SYSTEM_FUNCS=" TOOLCHAIN_FEATURES=" as_arch_directive - as_dn_directive as_fpu_directive as_func as_object_arch @@ -4379,10 +4378,6 @@ EOF check_as <