config/mips/mips.c

75 /* The maximum distance between the top of the stack frame and the
80    allocate and deallocate the top part of the frame.
419   HOST_WIDE_INT total_size;	/* # bytes that the entire frame takes up */
431   bool initialized;		/* true if frame size already calculated */
442      This area is allocated by the callee at the very top of the frame.  */
445   /* Current frame information, calculated by compute_frame_size.  */
446   struct mips_frame_info frame;
1441      hard frame pointer, both of which are usually valid base registers.
1456 	   stack pointer (which needs the restriction) or the hard frame
3525   gcc_assert ((cfun->machine->frame.mask >> 31) & 1);
3527 				  cfun->machine->frame.gp_sp_offset);
5328    to be in terms of the virtual frame pointer (stack pointer before
5330    the frame pointer to be the stack pointer after the initial
5332    is eliminated) points to the virtual frame pointer, while the frame
5348       HOST_WIDE_INT frame_size = (!cfun->machine->frame.initialized)
5350 				  : cfun->machine->frame.total_size;
5352       /* MIPS16 frame is smaller */
5354 	frame_size -= cfun->machine->frame.args_size;
5362     fatal_insn ("mips_debugger_offset called with non stack/frame/arg pointer",
6321   /* We need to save the old frame pointer before setting up a new one.  */
6357 /* Return the bytes needed to compute the frame pointer from the current
6414   HOST_WIDE_INT total_size;	/* # bytes that the entire frame takes up */
6442      looks like we are trying to create a second frame pointer to the
6493   cfun->machine->frame.total_size = total_size;
6494   cfun->machine->frame.var_size = var_size;
6495   cfun->machine->frame.args_size = args_size;
6496   cfun->machine->frame.cprestore_size = cprestore_size;
6497   cfun->machine->frame.gp_reg_size = gp_reg_size;
6498   cfun->machine->frame.fp_reg_size = fp_reg_size;
6499   cfun->machine->frame.mask = mask;
6500   cfun->machine->frame.fmask = fmask;
6501   cfun->machine->frame.initialized = reload_completed;
6502   cfun->machine->frame.num_gp = gp_reg_size / UNITS_PER_WORD;
6503   cfun->machine->frame.num_fp = fp_reg_size / (FP_INC * UNITS_PER_FPREG);
6511       cfun->machine->frame.gp_sp_offset = offset;
6512       cfun->machine->frame.gp_save_offset = offset - total_size;
6516       cfun->machine->frame.gp_sp_offset = 0;
6517       cfun->machine->frame.gp_save_offset = 0;
6527       cfun->machine->frame.fp_sp_offset = offset;
6528       cfun->machine->frame.fp_save_offset = offset - total_size;
6532       cfun->machine->frame.fp_sp_offset = 0;
6533       cfun->machine->frame.fp_save_offset = 0;
6541 /* Implement INITIAL_ELIMINATION_OFFSET.  FROM is either the frame
6543    hard frame pointer.  */
6560       offset = (cfun->machine->frame.total_size
6569     offset -= cfun->machine->frame.args_size;
6576    back to a previous frame.  */
6578 mips_return_addr (int count, rtx frame ATTRIBUTE_UNUSED)
6605    of the frame.  */
6620   offset = cfun->machine->frame.gp_sp_offset - sp_offset;
6622     if (BITSET_P (cfun->machine->frame.mask, regno - GP_REG_FIRST))
6630   offset = cfun->machine->frame.fp_sp_offset - sp_offset;
6635     if (BITSET_P (cfun->machine->frame.fmask, regno - FP_REG_FIRST))
6709 /* Set up the stack and frame (if desired) for the function.  */
6715   HOST_WIDE_INT tsize = cfun->machine->frame.total_size;
6754       /* .frame FRAMEREG, FRAMESIZE, RETREG */
6756 	       "\t.frame\t%s," HOST_WIDE_INT_PRINT_DEC ",%s\t\t"
6763 		? tsize - cfun->machine->frame.args_size
6766 	       cfun->machine->frame.var_size,
6767 	       cfun->machine->frame.num_gp,
6768 	       cfun->machine->frame.num_fp,
6769 	       cfun->machine->frame.args_size,
6770 	       cfun->machine->frame.cprestore_size);
6774 	       cfun->machine->frame.mask,
6775 	       cfun->machine->frame.gp_save_offset);
6777 	       cfun->machine->frame.fmask,
6778 	       cfun->machine->frame.fp_save_offset);
6803 /* Make the last instruction frame related and note that it performs
6819 /* Return a frame-related rtx that stores REG at MEM.
6841 /* Save register REG to MEM.  Make the instruction frame-related.  */
6894   if ((cfun->machine->frame.mask | cfun->machine->frame.fmask) != 0)
6906   /* Allocate the rest of the frame.  */
6919 		 from the stack pointer, so use the frame pointer as a
6920 		 temporary.  We should always be using a frame pointer
6941   /* Set up the frame pointer, if we're using one.  In mips16 code,
6942      we point the frame pointer ahead of the outgoing argument area.
6947       if (TARGET_MIPS16 && cfun->machine->frame.args_size != 0)
6949 	  rtx offset = GEN_INT (cfun->machine->frame.args_size);
6950 	  if (SMALL_OPERAND (cfun->machine->frame.args_size))
6965 					     cfun->machine->frame.args_size)));
6987 /* Do any necessary cleanup after a function to restore stack, frame,
7060   /* Split the frame into two.  STEP1 is the amount of stack we should
7065   step1 = cfun->machine->frame.total_size;
7068   /* Work out which register holds the frame address.  Account for the
7069      frame pointer offset used by mips16 code.  */
7076 	step1 -= cfun->machine->frame.args_size;
7081   if ((cfun->machine->frame.mask | cfun->machine->frame.fmask) != 0)
7119   mips_for_each_saved_reg (cfun->machine->frame.total_size - step2,
7122   /* Deallocate the final bit of the frame.  */
7149       if (TARGET_MIPS16 && (cfun->machine->frame.mask & RA_MASK) != 0)
7186   if (cfun->machine->frame.initialized)
7187     return cfun->machine->frame.total_size == 0;