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| author | Martin Storsjö <martin@martin.st> | 2017-05-09 10:25:44 +0300 |
|---|---|---|
| committer | Martin Storsjö <martin@martin.st> | 2017-05-15 09:52:18 +0300 |
| commit | d7320ca3ed10f0d35b3740fa03341161e74275ea (patch) | |
| tree | 399ceab1c0b0f6d92d493ae72dfd1cce22d63ad0 /configure | |
| parent | 6ccf76aec73b2cd598bb1e65d126d8a12540c411 (diff) | |
| download | ffmpeg-streaming-d7320ca3ed10f0d35b3740fa03341161e74275ea.zip ffmpeg-streaming-d7320ca3ed10f0d35b3740fa03341161e74275ea.tar.gz | |
arm: Avoid using .dn register aliases
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 <martin@martin.st>
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 5 |
1 files changed, 0 insertions, 5 deletions
@@ -1662,7 +1662,6 @@ SYSTEM_FUNCS=" TOOLCHAIN_FEATURES=" as_arch_directive - as_dn_directive as_fpu_directive as_func as_object_arch @@ -4380,10 +4379,6 @@ EOF check_as <<EOF && enable as_arch_directive .arch armv7-a EOF - check_as <<EOF && enable as_dn_directive -ra .dn d0.i16 -.unreq ra -EOF check_as <<EOF && enable as_fpu_directive .fpu neon EOF |
