PUBLIC void save_local_fpu(struct proc *pr)
{
if(!is_fpu())
return;
/* Save changed FPU context. */
if(osfxsr_feature) {
fxsave(pr->p_fpu_state.fpu_save_area_p);
fninit();
} else {
fnsave(pr->p_fpu_state.fpu_save_area_p);
}
}
void
_thread_machdep_save_float_state(struct _machdep_state *ms)
{
union savefpu *addr = &ms->fpreg;
if (_thread_machdep_osfxsr()) {
fwait();
fxsave(&addr->sv_xmm);
fninit();
} else
fnsave(&addr->sv_87);
fwait();
}
void save_local_fpu(struct proc *pr, int retain)
{
char *state = pr->p_seg.fpu_state;
/* Save process FPU context. If the 'retain' flag is set, keep the FPU
* state as is. If the flag is not set, the state is undefined upon
* return, and the caller is responsible for reloading a proper state.
*/
if(!is_fpu())
return;
assert(state);
if(osfxsr_feature) {
fxsave(state);
} else {
fnsave(state);
if (retain)
(void) frstor(state);
}
}
