From: Palmer Dabbelt <palmer@rivosinc.com>
To: gcc-patches@gcc.gnu.org
Cc: Palmer Dabbelt <palmer@rivosinc.com>
Subject: [PATCH] RISC-V: Add v_uimm_operand
Date: Thu, 11 May 2023 11:25:56 -0700 [thread overview]
Message-ID: <20230511182555.26183-1-palmer@rivosinc.com> (raw)
The vector shift immediates happen to have the same constraints as some
of the CSR-related operands, but it's a different usage. This adds a
name for them, so I don't get confused again next time.
gcc/ChangeLog:
* config/riscv/autovec.md (shifts): Use v_uimm_operand.
* config/riscv/predicates.md (v_uimm_operand): New predicate.
---
I haven't even build tested this one, I just saw it when reviewing some
patch and figured I'd send it along.
---
gcc/config/riscv/autovec.md | 2 +-
gcc/config/riscv/predicates.md | 5 +++++
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/gcc/config/riscv/autovec.md b/gcc/config/riscv/autovec.md
index ac0c939d277..daad51abbc2 100644
--- a/gcc/config/riscv/autovec.md
+++ b/gcc/config/riscv/autovec.md
@@ -132,7 +132,7 @@ (define_expand "<optab><mode>3"
[(set (match_operand:VI 0 "register_operand")
(any_shift:VI
(match_operand:VI 1 "register_operand")
- (match_operand:<VEL> 2 "csr_operand")))]
+ (match_operand:<VEL> 2 "v_uimm_operand")))]
"TARGET_VECTOR"
{
if (!CONST_SCALAR_INT_P (operands[2]))
diff --git a/gcc/config/riscv/predicates.md b/gcc/config/riscv/predicates.md
index e5adf06fa25..62007d6c6e3 100644
--- a/gcc/config/riscv/predicates.md
+++ b/gcc/config/riscv/predicates.md
@@ -43,6 +43,11 @@ (define_predicate "csr_operand"
(ior (match_operand 0 "const_csr_operand")
(match_operand 0 "register_operand")))
+;; V has 32-bit unsigned immediates. This happens to be the same constraint as
+; the csr_operand, but it's not CSR related.
+(define_predicate "v_uimm_operand"
+ (match_operand 0 "csr_operand"))
+
(define_predicate "sle_operand"
(and (match_code "const_int")
(match_test "SMALL_OPERAND (INTVAL (op) + 1)")))
--
2.40.0
next reply other threads:[~2023-05-11 18:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-11 18:25 Palmer Dabbelt [this message]
2023-05-11 22:00 钟居哲
2023-05-11 22:31 ` Palmer Dabbelt
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20230511182555.26183-1-palmer@rivosinc.com \
--to=palmer@rivosinc.com \
--cc=gcc-patches@gcc.gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).