+#ifdef CONFIG_MATH_EMULATION
+static int emulate_math(struct pt_regs *regs)
+{
+ int ret;
+ extern int do_mathemu(struct pt_regs *regs);
+
+ ret = do_mathemu(regs);
+ if (ret >= 0)
+ PPC_WARN_EMULATED(math, regs);
+
+ switch (ret) {
+ case 0:
+ emulate_single_step(regs);
+ return 0;
+ case 1: {
+ int code = 0;
+ code = __parse_fpscr(current->thread.fpscr.val);
+ _exception(SIGFPE, regs, code, regs->nip);
+ return 0;
+ }
+ case -EFAULT:
+ _exception(SIGSEGV, regs, SEGV_MAPERR, regs->nip);
+ return 0;
+ }
+
+ return -1;
+}
+#else
+static inline int emulate_math(struct pt_regs *regs) { return -1; }
+#endif
+