On 7/9/19 10:23 AM, claz...@gmail.com wrote: > Hi Jeff, > > Please find attached the updated patch. > > What is new: > - mailing list feedback is taken into account. > - some comments are updated. > - a new test is added. > - the ARC AUX registers used by ZOL (hardware loop) and FPX (a custom > floating point implementation) are saved before fp-register. > - the millicode optimization is not used by ISR. > > > Thank you, > Claudiu > > > 0001-ARC-Fix-and-refurbish-the-interrupts.patch > > From d22368681b7aab4bef4b5c32a9a472808f2c16cd Mon Sep 17 00:00:00 2001 > From: Claudiu Zissulescu <claz...@gmail.com> > Date: Fri, 17 May 2019 14:48:17 +0300 > Subject: [PATCH] [ARC] Fix and refurbish the interrupts. > > When entering an interrupt, not only the call save registers needs to > be place on stack but also the call clobbers one. More over, the > ARC700 return from interrupt instruction needs to be rtie, the same > like ARCv2 CPUs. While the ARC6xx family uses j.f [ilinkX] > instruction. Additionally, we need to save the state of the ZOL > machinery, namely the lp_count, lp_end and lp_start registers. For > architectures which are using extension registers (i.e., HS48) we need > to save/restore them as well. > > gcc/ > xxxx-xx-xx Claudiu Zissulescu <claz...@synopsys.com> > > * config/arc/arc-protos.h (arc_output_function_epilogue): Delete > declaration. > (arc_compute_frame_size): Millicode is disabled when compiling > ISR. > (arc_return_address_register): Likewise. > (arc_compute_function_type): Likewise. > (arc_compute_frame_size): Likewise. > (secondary_reload_info): Likewise. > (arc_get_unalign): Likewise. > (arc_can_use_return_insn): Declare. > * config/arc/arc.c (AUX_LP_START): Define > (AUX_LP_END): Likewise. > (arc_frame_info): Update gmask member to 64-bit datum. > (GMASK_LEN): Update. > (arc_compute_function_type): Make it static, move it forward. > (arc_must_save_register): Update, consider the extra regs. > (arc_compute_millicode_save_restore_regs): Update to use the 64 > bit gmask. > (arc_compute_frame_size): Likewise. > (arc_enter_leave_p): Likewise. > (arc_save_callee_saves): Likewise. > (arc_restore_callee_saves): Likewise. > (arc_save_callee_enter): Likewise. > (arc_restore_callee_leave): Likewise. > (arc_save_callee_milli): Likewise. > (arc_restore_callee_milli): Likewise. > (arc_expand_prologue): Add new interrupt handling. > (arc_return_address_register): Make it static, move it forward. > (arc_expand_epilogue): Add new interrupt handling. > (arc_get_unalign): Delete. > (arc_epilogue_uses): Make sure we do not remove the extra > saved/restored registers when interrupt. > (arc_can_use_return_insn): New function. > (push_reg): Likewise. > (pop_reg): Likewise. > (arc_save_callee_saves): Add ZOL and FPX aux registers saving > procedures. > (arc_restore_callee_saves): Likewise, but restoring. > * config/arc/arc.md (VUNSPEC_ARC_ARC600_RTIE): Define. > (R33_REG): Likewise. > (R34_REG): Likewise. > (R35_REG): Likewise. > (R36_REG): Likewise. > (R37_REG): Likewise. > (R38_REG): Likewise. > (R39_REG): Likewise. > (R45_REG): Likewise. > (R46_REG): Likewise. > (R47_REG): Likewise. > (R48_REG): Likewise. > (R49_REG): Likewise. > (R50_REG): Likewise. > (R51_REG): Likewise. > (R52_REG): Likewise. > (R53_REG): Likewise. > (R54_REG): Likewise. > (R55_REG): Likewise. > (R56_REG): Likewise. > (R58_REG): Likewise. > (type): Add rtie attribute. > (in_call_delay_slot): Use RETURN_ADDR_REGNUM. > (movsi_insn): Accept moves to lp_count. > (rtie): Update pattern. > (simple_return): Simplify it, don't use this pattern as a return > from an interrupt. > (arc600_rtie): New pattern. > (p_return_i): Clean up. > (return): Likewise. > * config/arc/builtins.def (rtie): Only available for non ARC6xx > family CPUs. > * config/arc/predicates.md (move_src_operand): Consider lp_count > as a register. > > gcc/testsuite > xxxx-xx-xx Claudiu Zissulescu <claz...@synopsys.com> > > * gcc.target/arc/arc.exp (check_effective_target_accregs): New > predicate. > * gcc.target/arc/builtin_special.c: Update test/ > * gcc.target/arc/interrupt-1.c: Likewise. > * gcc.target/arc/interrupt-10.c: New test. > * gcc.target/arc/interrupt-11.c: Likewise. > * gcc.target/arc/interrupt-12.c: Likewise. OK
Jeff
