Module Name: src Committed By: dsl Date: Sun Dec 30 16:13:57 UTC 2012
Modified Files: src/external/gpl3/gcc/dist/gcc/config/i386: driver-i386.c Log Message: If -march=native is specified, only enable AVX if the processor supports it and the OS has enabled XGETBV for application use. It might need to also check XCR0[2] (having executed XGETBV) to check that the kernel actually supports saving the YMM registers, but I suspect the kernel might defer setting that until the first fault. See vol 1 section 13.5 of the Intel SDM (intel_x86_325462.pdf). Fixes toolchain/45673 To generate a diff of this commit: cvs rdiff -u -r1.1.1.2 -r1.2 \ src/external/gpl3/gcc/dist/gcc/config/i386/driver-i386.c Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.