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Diffstat (limited to 'metadata/news/2019-09-11-cpu_flags_ppc-introduction/2019-09-11-cpu_flags_ppc-introduction.en.txt')
| -rw-r--r-- | metadata/news/2019-09-11-cpu_flags_ppc-introduction/2019-09-11-cpu_flags_ppc-introduction.en.txt | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/metadata/news/2019-09-11-cpu_flags_ppc-introduction/2019-09-11-cpu_flags_ppc-introduction.en.txt b/metadata/news/2019-09-11-cpu_flags_ppc-introduction/2019-09-11-cpu_flags_ppc-introduction.en.txt new file mode 100644 index 000000000000..a4a4ee5486b9 --- /dev/null +++ b/metadata/news/2019-09-11-cpu_flags_ppc-introduction/2019-09-11-cpu_flags_ppc-introduction.en.txt @@ -0,0 +1,38 @@ +Title: new CPU_FLAGS_PPC USE_EXPAND +Author: Georgy Yakovlev <gyakovlev@gentoo.org> +Posted: 2019-09-11 +Revision: 1 +News-Item-Format: 2.0 +Display-If-Keyword: ~ppc +Display-If-Keyword: ~ppc64 +Display-If-Keyword: ppc +Display-If-Keyword: ppc64 + + +A new set of CPU_FLAGS_PPC USE_EXPAND flags has been added. +The flags are: + + altivec - Use the AltiVec/VMX instruction set + vsx - Use the Vector Scalar Extension instruction set + vsx3 - Use the Vector Scalar Extension v.3 instruction set + +Note that CPU_FLAGS_PPC variable is used on ppc and ppc64 architectures. + +In order to transition to new set of flags, if the following flag was +was present: + + USE="altivec" + +This flag needs to be set as: + + CPU_FLAGS_PPC="altivec" + +It's advised to keep 'altivec' USE flag enabled to ensure safe +migration and compatibility with external repositories. +'vsx' and 'vsx3' are new flags and no migration necessary. + +To help users enable the correct USE_EXPAND flags PPC support has been +added to app-portage/cpuid2cpuflags package: + + # emerge -1v >=app-portage/cpuid2cpuflags-7 + $ cpuid2cpuflags |