r273811 - in /branches/ibm/pcrel-trunk/gcc: Cha...

[meissner@gcc.gnu.org]

Author: meissner
Date: Thu Jul 25 18:39:14 2019
New Revision: 273811

URL: https://gcc.gnu.org/viewcvs?rev=273811&root=gcc&view=rev
Log:
Add support for using prefixed addressing mode on DImode.

2019-07-25  Michael Meissner  <meissner@linux.ibm.com>

	* config/rs6000/predicates.md (add_operand): Add support for
	PADDI.
	(non_add_cint_operand): Add support for PADDI.
	* config/rs6000/rs6000.c (struct rs6000_reg_addr): Add field to
	say whether a mode supports using prefixed memory instructions.
	(mode_supports_prefixed_address_p): Make static inline.  Use the
	prefixed_memory_p to say whether a give mode supports prefixed
	memory instructions.
	(rs6000_hard_regno_mode_ok_uncached): Allow for larger vector
	types in the future.
	(rs6000_init_hard_regno_mode_ok): Set VOIDmode and DImode as the
	modes that support prefixed memory.
	(num_insns_constant_gpr): Use SIGNED_16BIT_OFFSET_P macro.  If we
	support prefixed memory instructions, know that we can load up
	34-bit constants directly in one instruction.
	(quad_address_p): Allow for larger vector types in the future.
	(rs6000_legitimate_offset_address_p): Add support for larger
	offsets if we have prefixed addressing.
	(rs6000_legitimate_address_p): Add support for prefixed
	addresses.  Do not allow update forms of addressing if the offset
	is larger than 16 bits, since prefixed memory instructions don't
	have update addressing formats.
	(rs6000_mode_dependent_address): Add support for 34 bit offsets if
	we have prefixed addressing.
	(rs6000_rtx_costs): Allow adds with 34-bit values which show up if
	we have prefixed addressing.
	(rs6000_num_insns): New function.
	(rs6000_insn_cost): When using the instruction length, count
	prefixed instructions as one instruction instead of three.
	* config/rs6000/rs6000.md (add<mode>, GPR iterator): Add support
	for the PADDI instruction if we have prefixed addressing.
	(movdi_internal64): Add support to load up 34 bit constants if we
	have prefixed addressing.


Modified:
    branches/ibm/pcrel-trunk/gcc/ChangeLog.meissner
    branches/ibm/pcrel-trunk/gcc/config/rs6000/predicates.md
    branches/ibm/pcrel-trunk/gcc/config/rs6000/rs6000.c
    branches/ibm/pcrel-trunk/gcc/config/rs6000/rs6000.md