r275912 - in /branches/ibm/pcrel-trunk/gcc: Cha...

Wed Sep 18 21:32:00 GMT 2019

Author: meissner
Date: Wed Sep 18 21:32:11 2019
New Revision: 275912

URL: https://gcc.gnu.org/viewcvs?rev=275912&root=gcc&view=rev
Log:
Use PADDI to load up 34-bit DImode constants.

2019-09-18  Michael Meissner  <meissner@linux.ibm.com>

	* config/rs6000/rs6000.c (num_insns_constant_gpr): Add support for
	PADDI to load up and/or add 34-bit integer constants.
	(rs6000_rtx_costs): Treat constants loaded up with PADDI with the
	same cost as normal 16-bit constants.
	* config/rs6000/rs6000.md (movdi_internal64): Add support to load
	up 34-bit integer constants with PADDI.
	(movdi integer constant splitter): Add comment about PADDI.

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