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From: Michael Meissner <meissner@gcc.gnu.org>
To: gcc-cvs@gcc.gnu.org
Subject: [gcc(refs/users/meissner/heads/work134-dmf)] PowerPC: Make -mcpu=future enable -mblock-ops-vector-pair.
Date: Fri, 15 Sep 2023 17:55:09 +0000 (GMT) [thread overview]
Message-ID: <20230915175509.5B4F63857031@sourceware.org> (raw)
https://gcc.gnu.org/g:3225653c2acc71d695fe22bcd15688b80dca55d7
commit 3225653c2acc71d695fe22bcd15688b80dca55d7
Author: Michael Meissner <meissner@linux.ibm.com>
Date: Fri Sep 15 13:54:50 2023 -0400
PowerPC: Make -mcpu=future enable -mblock-ops-vector-pair.
This patch enables generating load and store vector pair instructions when
doing certain memory copy operations when -mcpu=future is used. In doing tests
on power10, it was determined that using these instructions were problematical
in a few cases, so we disabled generating them by default. This patch
re-enabled generating these instructions if -mcpu=future is used.
The patches have been tested on the following platforms. I added the patches
for PR target/107299 that I submitted on November 2nd before doing the builds so
that GCC would build on systems using IEEE 128-bit long double.
* https://gcc.gnu.org/pipermail/gcc-patches/2022-November/604834.html
2023-09-15 Michael Meissner <meissner@linux.ibm.com>
gcc/
* config/rs6000/rs6000-cpus.def (ISA_FUTURE_MASKS): Add
-mblock-ops-vector-pair.
(POWERPC_MASKS): Likewise.
Diff:
---
gcc/config/rs6000/rs6000-cpus.def | 2 ++
1 file changed, 2 insertions(+)
diff --git a/gcc/config/rs6000/rs6000-cpus.def b/gcc/config/rs6000/rs6000-cpus.def
index deb4ea1c980..b9a4d9ad76e 100644
--- a/gcc/config/rs6000/rs6000-cpus.def
+++ b/gcc/config/rs6000/rs6000-cpus.def
@@ -88,6 +88,7 @@
/* Flags for a potential future processor that may or may not be delivered. */
#define ISA_FUTURE_MASKS (ISA_3_1_MASKS_SERVER \
+ | OPTION_MASK_BLOCK_OPS_VECTOR_PAIR \
| OPTION_MASK_FUTURE)
/* Flags that need to be turned off if -mno-power9-vector. */
@@ -125,6 +126,7 @@
/* Mask of all options to set the default isa flags based on -mcpu=<xxx>. */
#define POWERPC_MASKS (OPTION_MASK_ALTIVEC \
+ | OPTION_MASK_BLOCK_OPS_VECTOR_PAIR \
| OPTION_MASK_CMPB \
| OPTION_MASK_CRYPTO \
| OPTION_MASK_DFP \
reply other threads:[~2023-09-15 17:55 UTC|newest]
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