From: Michael Meissner <meissner@linux.ibm.com>
To: Ajit Agarwal <aagarwa1@linux.ibm.com>
Cc: gcc-patches <gcc-patches@gcc.gnu.org>,
Segher Boessenkool <segher@kernel.crashing.org>,
Peter Bergner <bergner@linux.ibm.com>,
"Kewen.Lin" <linkw@linux.ibm.com>,
David Edelsohn <dje.gcc@gmail.com>
Subject: Re: [PATCH v2] rs6000: Add new pass for replacement of contiguous addresses vector load lxv with lxvp
Date: Tue, 28 Nov 2023 02:05:16 -0500 [thread overview]
Message-ID: <ZWWRLIeGQdFsBy6a@cowardly-lion.the-meissners.org> (raw)
In-Reply-To: <ef0c54a5-c35c-3519-f062-9ac78ee66b81@linux.ibm.com>
I tried using this patch to compare with the vector size attribute patch I
posted. I could not build it as a cross compiler on my x86_64 because the
assembler gives the following error:
Error: operand out of domain (11 is not a multiple of 2) for
std_stacktrace-elf.o. If you look at the assembler, it has combined a lxvp 11
and lxvp 12 into:
lxvp 11,0(9)
The powerpc architecture requires that registers that are loaded with load
vector pair and stored with store vector point instructions only load/store
even/odd register pairs, and not odd/even pairs. Unfortunately, it will mean
that this optimization will match less often.
--
Michael Meissner, IBM
PO Box 98, Ayer, Massachusetts, USA, 01432
email: meissner@linux.ibm.com
next prev parent reply other threads:[~2023-11-28 7:05 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-07 19:04 Ajit Agarwal
2023-10-15 12:13 ` [PING ^0][PATCH " Ajit Agarwal
2023-10-23 8:32 ` [PING ^1][PATCH " Ajit Agarwal
2023-11-10 7:04 ` [PING ^2][PATCH " Ajit Agarwal
2023-11-24 9:31 ` [PATCH " Kewen.Lin
2023-11-28 4:34 ` Michael Meissner
2023-11-28 9:33 ` Kewen.Lin
2023-12-01 9:10 ` Ajit Agarwal
2023-12-04 2:01 ` Kewen.Lin
2023-12-05 13:43 ` Ajit Agarwal
2023-12-05 18:01 ` Ajit Agarwal
2023-12-06 2:22 ` Kewen.Lin
2023-12-06 5:09 ` Michael Meissner
2023-12-07 7:14 ` Kewen.Lin
2023-12-07 11:01 ` Ajit Agarwal
2023-12-08 8:01 ` Ajit Agarwal
2023-12-08 9:51 ` Kewen.Lin
2023-12-12 6:28 ` Kewen.Lin
2023-12-12 7:38 ` Ajit Agarwal
2023-11-28 7:05 ` Michael Meissner [this message]
2023-11-28 9:44 ` Kewen.Lin
2023-11-28 15:41 ` Michael Meissner
2023-11-29 14:10 ` Ajit Agarwal
2023-12-01 9:13 ` Ajit Agarwal
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