diff options
| -rw-r--r-- | sys/ia64/ia64/machdep.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/sys/ia64/ia64/machdep.c b/sys/ia64/ia64/machdep.c index 9f6ef66..e17a02c 100644 --- a/sys/ia64/ia64/machdep.c +++ b/sys/ia64/ia64/machdep.c @@ -1085,7 +1085,13 @@ get_mcontext(struct thread *td, mcontext_t *mc, int flags) mc->mc_flags |= _MC_FLAGS_ASYNC_CONTEXT; mc->mc_scratch = tf->tf_scratch; mc->mc_scratch_fp = tf->tf_scratch_fp; - /* XXX High FP */ + /* + * XXX If the thread never used the high FP registers, we + * probably shouldn't waste time saving them. + */ + ia64_highfp_save(td); + mc->mc_flags |= _MC_FLAGS_HIGHFP_VALID; + mc->mc_high_fp = td->td_pcb->pcb_high_fp; } save_callee_saved(&mc->mc_preserved); save_callee_saved_fp(&mc->mc_preserved_fp); @@ -1126,7 +1132,8 @@ set_mcontext(struct thread *td, const mcontext_t *mc) KASSERT(tf->tf_scratch.gr15 == SYS_sigreturn, ("foo")); tf->tf_scratch = mc->mc_scratch; tf->tf_scratch_fp = mc->mc_scratch_fp; - /* XXX High FP */ + if (mc->mc_flags & _MC_FLAGS_HIGHFP_VALID) + td->td_pcb->pcb_high_fp = mc->mc_high_fp; } else { KASSERT((tf->tf_flags & FRAME_SYSCALL) != 0, ("foo")); if ((mc->mc_flags & _MC_FLAGS_SCRATCH_VALID) == 0) { |
