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commit 539626070dd9b9b1e2d89874ab84cdb02031c2a0
Author: Samuel Thibault <[email protected]>
Date: Sun Mar 6 13:11:42 2016 +0100
Inherit fpu control word from parent to child
* i386/i386/thread.h (struct pcb): Add init_control field.
* i386/i386/fpu.h (fpinherit): New prototype.
* i386/i386/fpu.c (fpinit): Add thread parameter. When init_control field is
set, use that value instead of a hardcoded one.
(fpinherit): New function.
(fp_load): Pass thread parameter to fpinit().
* kern/thread.c (thread_create): Pass parent task to pcb_init().
* i386/i386/pcb.c (pcb_init): Add parent_task parameter, call fpinherit when
it is equal to current_task().
-----------------------------------------------------------------------
Summary of changes:
i386/i386/fpu.c | 49 +++++++++++++++++++++++++++++++++++++------------
i386/i386/fpu.h | 1 +
i386/i386/pcb.c | 7 ++++++-
i386/i386/pcb.h | 2 +-
i386/i386/thread.h | 1 +
kern/thread.c | 2 +-
6 files changed, 47 insertions(+), 15 deletions(-)
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