CVS commit: src/sys/arch

["David Laight" <dsl%netbsd.org@localhost>]

Module Name:    src
Committed By:   dsl
Date:           Tue Feb 25 22:16:52 UTC 2014

Modified Files:
        src/sys/arch/i386/i386: cpufunc.S
        src/sys/arch/x86/include: cpu_extended_state.h cpufunc.h fpu.h
        src/sys/arch/x86/x86: cpu.c fpu.c vm_machdep.c

Log Message:
Add support for saving the AVX-256 ymm registers during FPU context switches.
Add support for the forthcoming AVX-512 registers.
Code compiled with -mavx seems to work, but I've not tested context
  switches with live ymm registers.
There is a small cost on fork/exec (a larger area is copied/zerod),
  but I don't think the ymm registers are read/written unless they
  have been used.
The code use XSAVE on all cpus, I'm not brave enough to enable XSAVEOPT.


To generate a diff of this commit:
cvs rdiff -u -r1.18 -r1.19 src/sys/arch/i386/i386/cpufunc.S
cvs rdiff -u -r1.8 -r1.9 src/sys/arch/x86/include/cpu_extended_state.h
cvs rdiff -u -r1.17 -r1.18 src/sys/arch/x86/include/cpufunc.h
cvs rdiff -u -r1.5 -r1.6 src/sys/arch/x86/include/fpu.h
cvs rdiff -u -r1.109 -r1.110 src/sys/arch/x86/x86/cpu.c
cvs rdiff -u -r1.8 -r1.9 src/sys/arch/x86/x86/fpu.c
cvs rdiff -u -r1.23 -r1.24 src/sys/arch/x86/x86/vm_machdep.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.