From: Christoph Muellner <christoph.muellner@vrull.eu>
To: gcc-patches@gcc.gnu.org, Kito Cheng <kito.cheng@sifive.com>,
Jim Wilson <jim.wilson.gcc@gmail.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Andrew Waterman <andrew@sifive.com>,
Philipp Tomsich <philipp.tomsich@vrull.eu>,
Jeff Law <jeffreyalaw@gmail.com>,
Vineet Gupta <vineetg@rivosinc.com>
Subject: [PATCH 1/7] riscv: bitmanip: add orc.b as an unspec
Date: Mon, 14 Nov 2022 00:05:15 +0100 [thread overview]
Message-ID: <20221113230521.712693-2-christoph.muellner@vrull.eu> (raw)
In-Reply-To: <20221113230521.712693-1-christoph.muellner@vrull.eu>
From: Philipp Tomsich <philipp.tomsich@vrull.eu>
As a basis for optimized string functions (e.g., the by-pieces
implementations), we need orc.b available. This adds orc.b as an
unspec, so we can expand to it.
gcc/ChangeLog:
* config/riscv/bitmanip.md (orcb<mode>2): Add orc.b as an
unspec.
* config/riscv/riscv.md: Add UNSPEC_ORC_B.
Signed-off-by: Philipp Tomsich <philipp.tomsich@vrull.eu>
---
gcc/config/riscv/bitmanip.md | 8 ++++++++
gcc/config/riscv/riscv.md | 3 +++
2 files changed, 11 insertions(+)
diff --git a/gcc/config/riscv/bitmanip.md b/gcc/config/riscv/bitmanip.md
index b44fb9517e7..3dbe6002974 100644
--- a/gcc/config/riscv/bitmanip.md
+++ b/gcc/config/riscv/bitmanip.md
@@ -242,6 +242,14 @@ (define_insn "rotlsi3_sext"
"rolw\t%0,%1,%2"
[(set_attr "type" "bitmanip")])
+;; orc.b (or-combine) is added as an unspec for the benefit of the support
+;; for optimized string functions (such as strcmp).
+(define_insn "orcb<mode>2"
+ [(set (match_operand:X 0 "register_operand" "=r")
+ (unspec:X [(match_operand:X 1 "register_operand" "r")] UNSPEC_ORC_B))]
+ "TARGET_ZBB"
+ "orc.b\t%0,%1")
+
(define_insn "bswap<mode>2"
[(set (match_operand:X 0 "register_operand" "=r")
(bswap:X (match_operand:X 1 "register_operand" "r")))]
diff --git a/gcc/config/riscv/riscv.md b/gcc/config/riscv/riscv.md
index 798f7370a08..532289dd178 100644
--- a/gcc/config/riscv/riscv.md
+++ b/gcc/config/riscv/riscv.md
@@ -62,6 +62,9 @@ (define_c_enum "unspec" [
;; Stack tie
UNSPEC_TIE
+
+ ;; OR-COMBINE
+ UNSPEC_ORC_B
])
(define_c_enum "unspecv" [
--
2.38.1
next prev parent reply other threads:[~2022-11-13 23:05 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-13 23:05 [PATCH 0/7] riscv: Improve builtins expansion Christoph Muellner
2022-11-13 23:05 ` Christoph Muellner [this message]
2022-11-14 16:51 ` [PATCH 1/7] riscv: bitmanip: add orc.b as an unspec Jeff Law
2022-11-14 17:53 ` Jeff Law
2022-11-14 19:05 ` Philipp Tomsich
2022-11-13 23:05 ` [PATCH 2/7] riscv: bitmanip/zbb: Add prefix/postfix and enable visiblity Christoph Muellner
2022-11-14 16:55 ` Jeff Law
2022-11-13 23:05 ` [PATCH 3/7] riscv: Enable overlap-by-pieces via tune param Christoph Muellner
2022-11-14 2:48 ` Vineet Gupta
2022-11-14 7:59 ` Philipp Tomsich
2022-11-14 8:29 ` Christoph Müllner
2022-11-14 19:04 ` Jeff Law
2022-11-14 19:07 ` Christoph Müllner
2022-11-13 23:05 ` [PATCH 4/7] riscv: Move riscv_block_move_loop to separate file Christoph Muellner
2022-11-14 16:56 ` Jeff Law
2022-11-13 23:05 ` [PATCH 5/7] riscv: Use by-pieces to do overlapping accesses in block_move_straight Christoph Muellner
2022-11-14 17:16 ` Jeff Law
2022-11-14 19:01 ` Christoph Müllner
2022-11-14 19:05 ` Jeff Law
2022-11-13 23:05 ` [PATCH 6/7] riscv: Add support for strlen inline expansion Christoph Muellner
2022-11-14 18:17 ` Jeff Law
2022-11-14 21:07 ` Christoph Müllner
2022-11-13 23:05 ` [PATCH 7/7] riscv: Add support for str(n)cmp " Christoph Muellner
2022-11-14 19:28 ` Jeff Law
2022-11-14 21:49 ` Christoph Müllner
2022-11-15 0:22 ` Jeff Law
2022-11-15 0:46 ` Kito Cheng
2022-11-15 0:53 ` Palmer Dabbelt
2022-11-15 1:55 ` Kito Cheng
2022-11-15 3:41 ` Jeff Law
2022-11-15 22:22 ` Christoph Müllner
2022-11-16 0:15 ` Philipp Tomsich
2022-11-21 3:24 ` Kito Cheng
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