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author | Nick Desaulniers <ndesaulniers@google.com> | 2019-07-22 15:31:05 -0700 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-01 08:24:45 +0200 |
commit | a7e7ba5757ec4dc3cd85b2390a2719a03fc82fa8 (patch) | |
tree | 72cf7fedf446fd49ba46af7f61312898eb33c136 /CREDITS | |
parent | eaf30707118815e2e5bf332ccb34857a4959c644 (diff) |
drm/amd/display: readd -msse2 to prevent Clang from emitting libcalls to undefined SW FP routines
commit 0f0727d971f6fdf8f1077180d495ddb9928f0c8b upstream.
arch/x86/Makefile disables SSE and SSE2 for the whole kernel. The
AMDGPU drivers modified in this patch re-enable SSE but not SSE2. Turn
on SSE2 to support emitting double precision floating point instructions
rather than calls to non-existent (usually available from gcc_s or
compiler_rt) floating point helper routines for Clang.
This was originally landed in:
commit 10117450735c ("drm/amd/display: add -msse2 to prevent Clang from emitting libcalls to undefined SW FP routines")
but reverted in:
commit 193392ed9f69 ("Revert "drm/amd/display: add -msse2 to prevent Clang from emitting libcalls to undefined SW FP routines"")
due to bugreports from GCC builds. Add guards to only do so for Clang.
Link: https://bugs.freedesktop.org/show_bug.cgi?id=109487
Link: https://github.com/ClangBuiltLinux/linux/issues/327
Suggested-by: Sedat Dilek <sedat.dilek@gmail.com>
Suggested-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'CREDITS')
0 files changed, 0 insertions, 0 deletions