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r235627 - in /trunk/gcc: ChangeLog config/s390/...
- From: krebbel at gcc dot gnu dot org
- To: gcc-cvs at gcc dot gnu dot org
- Date: Fri, 29 Apr 2016 09:17:36 -0000
- Subject: r235627 - in /trunk/gcc: ChangeLog config/s390/...
Author: krebbel
Date: Fri Apr 29 09:17:35 2016
New Revision: 235627
URL: https://gcc.gnu.org/viewcvs?rev=235627&root=gcc&view=rev
Log:
S/390: Replace LDER with LDR.
For performance reasons it is important to write the full 64 bits of
an FPR target reg even when dealing with 32 bit values. So we chose
lder over ler for 32 bit float register moves. lder zero-extends the
32 bit value from the source reg to 64 bit in the target. However,
since it actually doesn't matter whether we write the upper 32 bits
with zeros or with any other garbage we can also use ldr instead. It
is bit shorter and therefore will do good for I-Cache usage.
gcc/ChangeLog:
2016-04-29 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
* config/s390/2964.md ("z13_unit_fxu", "z13_0"): Remove lder.
* config/s390/s390.md ("movsi_larl", "*movsi_esa", "mov<mode>"):
Change lder to ldr.
* config/s390/vector.md ("mov<mode>"): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/s390/2964.md
trunk/gcc/config/s390/s390.md
trunk/gcc/config/s390/vector.md