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Index: sys/powerpc/include/psl.h
===================================================================
--- sys/powerpc/include/psl.h
+++ sys/powerpc/include/psl.h
@@ -88,7 +88,7 @@
#define PSL_FE_NONREC PSL_FE1 /* imprecise non-recoverable */
#define PSL_FE_REC PSL_FE0 /* imprecise recoverable */
#define PSL_FE_PREC (PSL_FE0 | PSL_FE1) /* precise */
-#define PSL_FE_DFLT PSL_FE_DIS /* default == none */
+#define PSL_FE_DFLT PSL_FE_PREC /* default == precise */
#ifndef LOCORE
extern register_t psl_kernset; /* Default MSR values for kernel */
Index: sys/powerpc/powerpc/exec_machdep.c
===================================================================
--- sys/powerpc/powerpc/exec_machdep.c
+++ sys/powerpc/powerpc/exec_machdep.c
@@ -1158,6 +1158,12 @@
sig = fpu_emulate(frame, &pcb->pcb_fpu);
if ((sig == 0 || sig == SIGFPE) && pcb->pcb_flags & PCB_FPU)
enable_fpu(td);
+#else
+ if (frame->srr1 & EXC_PGM_FPENABLED && (pcb->pcb_flags & PCB_FPU)) {
+ /* Floating-Point Enabled Exception type Program interrupt */
+ sig = SIGFPE;
+ enable_fpu(td);
+ }
#endif
if (sig == SIGILL) {
if (pcb->pcb_lastill != frame->srr0) {
Index: sys/powerpc/powerpc/trap.c
===================================================================
--- sys/powerpc/powerpc/trap.c
+++ sys/powerpc/powerpc/trap.c
@@ -397,8 +397,31 @@
ucode = ILL_PRVOPC;
else if (frame->srr1 & EXC_PGM_ILLEGAL)
ucode = ILL_ILLOPC;
- } else if (sig == SIGFPE)
- ucode = FPE_FLTINV; /* Punt for now, invalid operation. */
+ } else if (sig == SIGFPE && (td->td_pcb->pcb_flags & PCB_FPU)) {
+ int msr;
+ uint64_t reg;
+
+ msr = mfmsr();
+
+ mtmsr(msr | PSL_FP);
+ __asm __volatile ("mffs 0; stfd 0,0(%0)"
+ :: "b"(&reg));
+
+ mtmsr(msr);
+
+ if (reg & FPSCR_ZX)
+ ucode = FPE_FLTDIV;
+ else if (reg & FPSCR_OX)
+ ucode = FPE_FLTOVF;
+ else if (reg & FPSCR_UX)
+ ucode = FPE_FLTUND;
+ else if (reg & FPSCR_XX)
+ ucode = FPE_FLTRES;
+ else
+ ucode = FPE_FLTINV;
+
+ save_fpu(td);
+ }
}
break;

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