r276724 - in /branches/ibm/pcrel-trunk/gcc: Cha...

Tue Oct 8 22:06:00 GMT 2019

Author: meissner
Date: Tue Oct  8 22:06:17 2019
New Revision: 276724

URL: https://gcc.gnu.org/viewcvs?rev=276724&root=gcc&view=rev
Log:
Use PADDI (PLI) to load up 34-bit DImode constants on 'future'

2019-10-08  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