mips/kernel/traps.c

772 void force_fcr31_sig(unsigned long fcr31, void __user *fault_addr,
777 	if (fcr31 & FPU_CSR_INV_X)
779 	else if (fcr31 & FPU_CSR_DIV_X)
781 	else if (fcr31 & FPU_CSR_OVF_X)
783 	else if (fcr31 & FPU_CSR_UDF_X)
785 	else if (fcr31 & FPU_CSR_INE_X)
791 int process_fpemu_return(int sig, void __user *fault_addr, unsigned long fcr31)
800 		force_fcr31_sig(fcr31, fault_addr, current);
828 	unsigned long fcr31;
858 	 * enabled Cause bits set in $fcr31.
860 	fcr31 = mask_fcr31_x(current->thread.fpu.fcr31);
861 	current->thread.fpu.fcr31 &= ~fcr31;
867 	process_fpemu_return(sig, fault_addr, fcr31);
875 asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31)
887 	write_32bit_cp1_register(CP1_STATUS, fcr31 & ~mask_fcr31_x(fcr31));
892 	if (fcr31 & FPU_CSR_UNI_X) {
910 		 * enabled Cause bits set in $fcr31.
912 		fcr31 = mask_fcr31_x(current->thread.fpu.fcr31);
913 		current->thread.fpu.fcr31 &= ~fcr31;
923 	process_fpemu_return(sig, fault_addr, fcr31);
1168 		unsigned long fcr31 = 0;
1170 		status = mipsr2_decoder(regs, opcode, &fcr31);
1180 					     fcr31);
1385 						 current->thread.fpu.fcr31);
1469 		unsigned long fcr31;
1482 		 * any enabled Cause bits set in $fcr31.
1484 		fcr31 = mask_fcr31_x(current->thread.fpu.fcr31);
1485 		current->thread.fpu.fcr31 &= ~fcr31;
1488 		if (!process_fpemu_return(sig, fault_addr, fcr31) && !err)