All of lore.kernel.org
 help / color / mirror / Atom feed
From: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
To: Palmer Dabbelt <palmer@rivosinc.com>
Cc: linux-sparse@vger.kernel.org, Kito Cheng <kito.cheng@gmail.com>,
	linux-riscv@lists.infradead.org, mkl@pengutronix.de,
	aurelien@aurel32.net,
	Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH v1 2/6] RISC-V: Match GCC's semantics for multiple -march instances
Date: Sat, 21 May 2022 23:52:31 +0200	[thread overview]
Message-ID: <20220521215231.66yvpgji64uqbyzv@mail> (raw)
In-Reply-To: <20220402050041.21302-3-palmer@rivosinc.com>

On Fri, Apr 01, 2022 at 10:00:37PM -0700, Palmer Dabbelt wrote:
> GCC's semantics for "-march=X -march=Y" are that Y entirely overrides X,
> but sparse takes the union of these two ISA strings.

OK, but then I prefer to explicitly clear riscv_flags at the start
of the function, like:

diff --git a/target-riscv.c b/target-riscv.c
index 3bba7c15ff1f..ca38d76e6465 100644
--- a/target-riscv.c
+++ b/target-riscv.c
@@ -54,6 +54,9 @@ static void parse_march_riscv(const char *arg)
 	};
 	int i;
 
+	// Each -march=.. options entirely overrides previous ones
+	riscv_flags = 0;
+
 	for (i = 0; i < ARRAY_SIZE(basic_sets); i++) {
 		const char *pat = basic_sets[i].pattern;
 		size_t len = strlen(pat);


-- Luc

_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

WARNING: multiple messages have this Message-ID (diff)
From: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
To: Palmer Dabbelt <palmer@rivosinc.com>
Cc: linux-sparse@vger.kernel.org, Kito Cheng <kito.cheng@gmail.com>,
	linux-riscv@lists.infradead.org, mkl@pengutronix.de,
	aurelien@aurel32.net,
	Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH v1 2/6] RISC-V: Match GCC's semantics for multiple -march instances
Date: Sat, 21 May 2022 23:52:31 +0200	[thread overview]
Message-ID: <20220521215231.66yvpgji64uqbyzv@mail> (raw)
In-Reply-To: <20220402050041.21302-3-palmer@rivosinc.com>

On Fri, Apr 01, 2022 at 10:00:37PM -0700, Palmer Dabbelt wrote:
> GCC's semantics for "-march=X -march=Y" are that Y entirely overrides X,
> but sparse takes the union of these two ISA strings.

OK, but then I prefer to explicitly clear riscv_flags at the start
of the function, like:

diff --git a/target-riscv.c b/target-riscv.c
index 3bba7c15ff1f..ca38d76e6465 100644
--- a/target-riscv.c
+++ b/target-riscv.c
@@ -54,6 +54,9 @@ static void parse_march_riscv(const char *arg)
 	};
 	int i;
 
+	// Each -march=.. options entirely overrides previous ones
+	riscv_flags = 0;
+
 	for (i = 0; i < ARRAY_SIZE(basic_sets); i++) {
 		const char *pat = basic_sets[i].pattern;
 		size_t len = strlen(pat);


-- Luc

  reply	other threads:[~2022-05-21 21:52 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-02  5:00 [PATCH v1 0/6] RISC-V -march handling improvements Palmer Dabbelt
2022-04-02  5:00 ` Palmer Dabbelt
2022-04-02  5:00 ` [PATCH v1 1/6] RISC-V: Respect -Wsparse-error for -march errors Palmer Dabbelt
2022-04-02  5:00   ` Palmer Dabbelt
2022-05-21 21:46   ` Luc Van Oostenryck
2022-05-21 21:46     ` Luc Van Oostenryck
2022-04-02  5:00 ` [PATCH v1 2/6] RISC-V: Match GCC's semantics for multiple -march instances Palmer Dabbelt
2022-04-02  5:00   ` Palmer Dabbelt
2022-05-21 21:52   ` Luc Van Oostenryck [this message]
2022-05-21 21:52     ` Luc Van Oostenryck
2022-04-02  5:00 ` [PATCH v1 3/6] RISC-V: Remove the unimplemented ISA extensions Palmer Dabbelt
2022-04-02  5:00   ` Palmer Dabbelt
2022-05-21 22:05   ` Luc Van Oostenryck
2022-05-21 22:05     ` Luc Van Oostenryck
2022-04-02  5:00 ` [PATCH v1 4/6] RISC-V: Remove "g" from the extension list Palmer Dabbelt
2022-04-02  5:00   ` Palmer Dabbelt
2022-04-02  5:00 ` [PATCH v1 5/6] RISC-V: Add the Zicsr extension Palmer Dabbelt
2022-04-02  5:00   ` Palmer Dabbelt
2022-04-02  5:00 ` [PATCH v1 6/6] RISC-V: Add the Zifencei extension Palmer Dabbelt
2022-04-02  5:00   ` Palmer Dabbelt
2022-04-04 17:52 ` [PATCH v1 0/6] RISC-V -march handling improvements Marc Kleine-Budde
2022-04-04 17:52   ` Marc Kleine-Budde
2022-04-04 23:15   ` Palmer Dabbelt
2022-04-04 23:15     ` Palmer Dabbelt
2022-05-21 21:23 ` Luc Van Oostenryck
2022-05-21 21:23   ` Luc Van Oostenryck
2022-07-05 23:09   ` Palmer Dabbelt
2022-07-05 23:09     ` 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=20220521215231.66yvpgji64uqbyzv@mail \
    --to=luc.vanoostenryck@gmail.com \
    --cc=aurelien@aurel32.net \
    --cc=kito.cheng@gmail.com \
    --cc=linux-riscv@lists.infradead.org \
    --cc=linux-sparse@vger.kernel.org \
    --cc=mkl@pengutronix.de \
    --cc=palmer@rivosinc.com \
    --cc=torvalds@linux-foundation.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.