r278795 - in /branches/ibm/pcrel-trunk/gcc: Cha...

Thu Nov 28 00:40:00 GMT 2019

Author: meissner
Date: Thu Nov 28 00:40:35 2019
New Revision: 278795

URL: https://gcc.gnu.org/viewcvs?rev=278795&root=gcc&view=rev
Log:
Use PADDI (PLI) to load up 34-bit DImode constants.

2019-11-27   Michael Meissner  <meissner@linux.ibm.com>

	* config/rs6000/rs6000.c (num_insns_constant_gpr): Use
	SIGNED_16BIT_OFFSET_P for range test.  Know that PADDI (PLI) can
	load up to 34-bit constants in a single instruction when
	-mcpu=future is used.
	(rs6000_rtx_costs): Treat PADDIs as a single instruction in terms
	of cost.
	* config/rs6000/rs6000.md (movdi_internal64): Add alternative to
	use PADDI (PLI) to load up 34-bit constants when -mcpu=future is
	used.

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