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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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 */
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 /** @addtogroup ia32  
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/** @addtogroup ia32   
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 * @{
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 * @{
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 */
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 */
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/** @file
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/** @file
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 *
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 *
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 */
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 */
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#include <arch.h>
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#include <arch.h>
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#include <cpu.h>
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#include <cpu.h>
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typedef void (*fpu_context_function)(fpu_context_t *fctx);
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typedef void (*fpu_context_function)(fpu_context_t *fctx);
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static fpu_context_function fpu_save,fpu_restore;
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static fpu_context_function fpu_save, fpu_restore;
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static void fpu_context_f_save(fpu_context_t *fctx)
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static void fpu_context_f_save(fpu_context_t *fctx)
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{
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{
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    __asm__ volatile (
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    __asm__ volatile (
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        "fnsave %0"
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        "fnsave %0"
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/*
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/*
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    Setup using not fxsr instruction
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    Setup using not fxsr instruction
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*/
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*/
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void fpu_fsr(void)
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void fpu_fsr(void)
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{
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{
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    fpu_save=fpu_context_f_save;
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    fpu_save = fpu_context_f_save;
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    fpu_restore=fpu_context_f_restore;
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    fpu_restore = fpu_context_f_restore;
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}
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}
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void fpu_context_save(fpu_context_t *fctx)
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void fpu_context_save(fpu_context_t *fctx)
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{
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{
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    fpu_save(fctx);
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    fpu_save(fctx);
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}
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}
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void fpu_context_restore(fpu_context_t *fctx)
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void fpu_context_restore(fpu_context_t *fctx)
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{
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{
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    fpu_restore(fctx);
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    fpu_restore(fctx);
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}
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}
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void fpu_init()
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void fpu_init()
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{
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{
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    uint32_t help0=0,help1=0;
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    uint32_t help0 = 0, help1 = 0;
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    __asm__ volatile (
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    __asm__ volatile (
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        "fninit;\n"
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        "fninit;\n"
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        "stmxcsr %0\n"
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        "stmxcsr %0\n"
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        "mov %0,%1;\n"
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        "mov %0,%1;\n"
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        "or %2,%1;\n"
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        "or %2,%1;\n"
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        "mov %1,%0;\n"
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        "mov %1,%0;\n"
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        "ldmxcsr %0;\n"
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        "ldmxcsr %0;\n"
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        :"+m"(help0),"+r"(help1)
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        : "+m" (help0), "+r" (help1)
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        :"i"(0x1f80)
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        : "i" (0x1f80)
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    );
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    );
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}
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}
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 /** @}
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/** @}
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 */
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 */
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 -