diff options
| author | kib <kib@FreeBSD.org> | 2015-06-29 12:06:36 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2015-06-29 12:06:36 +0000 |
| commit | 623bffc36388de5d5ea6e20d990ba183e36ceb47 (patch) | |
| tree | e9b0f95911a064282e73cae6af237abbda404d74 /sys/i386/include/npx.h | |
| parent | 67042ee4424a0596a3848a68d5576b81daf0b21c (diff) | |
| download | FreeBSD-src-623bffc36388de5d5ea6e20d990ba183e36ceb47.zip FreeBSD-src-623bffc36388de5d5ea6e20d990ba183e36ceb47.tar.gz | |
Provide npx_get_fsave(9) and npx_set_fsave(9) functions to obtain and
restore the FPU state from the format of machine FSAVE area. The
intended use is for ABI emulators to provide FSAVE-formatted FPU state
to usermode requiring it, while kernel could use FXSAVE due to
XMM/XSAVE.
The core functionality to convert from/to FXSAVE format is shared with
the fill_fpregs_xmm() and set_fpregs_xmm(). Move the later functions
to npx.c and rename them to npx_fill_fpregs_xmm() and
npx_set_fpregs_xmm(). They differ from nptx_get/set_fsave(9) since
our mcontext contains padding to be zeroed or ignored.
fill_fpregs() and set_fpregs() could be converted to use the new
interface, but there are small differences to handle.
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Diffstat (limited to 'sys/i386/include/npx.h')
| -rw-r--r-- | sys/i386/include/npx.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/i386/include/npx.h b/sys/i386/include/npx.h index 66f432a..0557228 100644 --- a/sys/i386/include/npx.h +++ b/sys/i386/include/npx.h @@ -67,6 +67,11 @@ void npxsuspend(union savefpu *addr); int npxtrap_x87(void); int npxtrap_sse(void); void npxuserinited(struct thread *); +void npx_get_fsave(void *); +int npx_set_fsave(void *); +void npx_fill_fpregs_xmm(struct savexmm *, struct save87 *); +void npx_set_fpregs_xmm(struct save87 *, struct savexmm *); + struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags); void fpu_kern_free_ctx(struct fpu_kern_ctx *ctx); int fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx, |
