d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

If parent thread never used FPU, the only work is to clear flag

Browse Source 
PCB_NPXINITDONE for new thread and let trap code initialize it.
This commit is contained in:
David Xu 2006-05-28 04:40:45 +00:00
parent 38fd748725
commit 40310f021d
1 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
sys/i386/isa/npx.c
View File

@ -952,9 +952,14 @@ npx_fork_thread(struct thread *td, struct thread *newtd)
u_int32_t mxcsr;
u_int32_t cw;
if (!(td->td_pcb->pcb_flags & PCB_NPXINITDONE)) {
newtd->td_pcb->pcb_flags &= ~PCB_NPXINITDONE;
return;
}
state = &newtd->td_pcb->pcb_save;
/* get control word */
if (npxgetregs(td, &newtd->td_pcb->pcb_save))
if (npxgetregs(td, state))
return;
if (cpu_fxsr) {
mxcsr = state->sv_xmm.sv_env.en_mxcsr;