GCC 12 should have proper support for IEEE-754 compliant 128-bit
floating point in libstdc++. So warning is needed when linking against
older libstdc++ versions or LLVM libc++.
Glibc starts supporting float128 in both header and libraries since
2.32.
Reviewed By: jsji
Differential Revision: https://reviews.llvm.org/D112906
Port mmintrin.h which include x86 MMX intrinsics implementation to PowerPC platform (using Altivec).
To make the include process correct, PowerPC's toolchain class is overrided to insert new headers directory (named ppc_wrappers) into the path. Basic test cases for several intrinsic functions are added.
The header is mainly developed by Steven Munroe, with contributions from Paul Clarke, Bill Schmidt, Jinsong Ji and Zixuan Wu.
Reviewed By: Jinsong Ji
Differential Revision: https://reviews.llvm.org/D59924
llvm-svn: 358949
Qiu Chaofan