[SCM] GNU Mach branch, master, updated. 9e608d32e9e85246decd868f326efde66108c7f3

[Samuel Thibault]

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- Log -----------------------------------------------------------------
commit 9e608d32e9e85246decd868f326efde66108c7f3
Author: Samuel Thibault <address@hidden>
Date:   Sat Nov 28 17:09:38 2009 +0100

    Add XMM FPU registers save/restore support.
    
        * i386/include/mach/i386/fp_reg.h (struct i386_fp_regs): Invert array
        indices.
        (struct i386_xfp_save): New structure.
        (FP_387X): New macro.
        * i386/i386/thread.h (struct i386_fpsave_state): Add xfp_save_state
        member, keep existing fp_save_state and fp_regs members in an unnamed
        union member.  Move fp_valid member to the end of the structure.
        * i386/i386/fpu.h (fxsave, fxrstor): New macros.
        (fpu_save_context): Use fxsave() when FPU is FXSR-capable.
        * i386/i386/fpu.c: Include <i386/locore.h>
        (mxcsr_feature_mask): New variable.
        (fp_save, fp_load): Add declaration.
        (init_fpu): Add FXSR-capable FPU detection.
        (fpu_module_init): Request 16-byte alignment to zinit() for
        i386_fpsave_state structures.
        (twd_i387_to_fxsr, twd_fxsr_to_i387): New functions.
        (fpu_set_state): Convert FPU state when FPU is FXSR-capable.
        (fpu_get_state): Convert FPU state when FPU is FXSR-capable.
            (fpexterrflt): Pass to i386_exception either xfp_save_state or
            fp_save_state according to FPU type.
        (fpastintr): Likewise.
        (fp_load): Likewise.  Use fxrstor() when FPU is FXSR-capable.
        (fp_save): Use fxsave() when FPU is FXSR-capable.
        (fp_state_alloc): Add FXSR-aware initialization.

-----------------------------------------------------------------------

Summary of changes:
 i386/i386/fpu.c                        |  208 +++++++++++++++++++++++++++-----
 i386/i386/fpu.h                        |   11 ++-
 i386/i386/thread.h                     |    9 +-
 i386/include/mach/i386/fp_reg.h        |   23 ++++-
 i386/include/mach/i386/thread_status.h |    2 +-
 5 files changed, 217 insertions(+), 36 deletions(-)


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