diff options
| -rw-r--r-- | sys/src/9/pc64/main.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/sys/src/9/pc64/main.c b/sys/src/9/pc64/main.c index 175f809bc..7e1b8449a 100644 --- a/sys/src/9/pc64/main.c +++ b/sys/src/9/pc64/main.c @@ -535,7 +535,7 @@ mathemu(Ureg *ureg, void*) case FPinit: fpinit(); index = up->fpstate >> FPindexs; - if(index < 0 || index > FPindexm) + if(index < 0 || index > (FPindexm>>FPindexs)) panic("fpslot index overflow: %d", index); if(userureg(ureg)){ if(index != 0) @@ -684,7 +684,7 @@ procsave(Proc *p) * emulation fault to activate the FPU. */ fpsave(p->fpsave); - p->fpstate = FPinactive | (p->fpstate & (FPpush|FPnouser|FPkernel|FPindexm)); + p->fpstate = FPinactive | (p->fpstate & ~FPactive); break; } @@ -729,7 +729,8 @@ fpurestore(int ostate) if((astate & ~(FPnouser|FPkernel|FPindexm)) == FPactive) _stts(); up->fpsave = up->fpslot[ostate>>FPindexs]; - ostate = FPinactive | (ostate & (FPillegal|FPpush|FPnouser|FPkernel|FPindexm)); + if(ostate & FPactive) + ostate = FPinactive | (ostate & ~FPactive); } up->fpstate = ostate; } |