From: "Morten Brørup" <mb@smartsharesystems.com>
To: "Andre Muezerie" <andremue@linux.microsoft.com>,
"Tyler Retzlaff" <roretzla@linux.microsoft.com>
Cc: <dev@dpdk.org>
Subject: RE: [PATCH 2/5] lib/eal: add portable version of __builtin_add_overflow
Date: Fri, 3 Jan 2025 09:19:42 +0100 [thread overview]
Message-ID: <98CBD80474FA8B44BF855DF32C47DC35E9F98D@smartserver.smartshare.dk> (raw)
In-Reply-To: <1735857169-19131-3-git-send-email-andremue@linux.microsoft.com>
> From: Andre Muezerie [mailto:andremue@linux.microsoft.com]
> Sent: Thursday, 2 January 2025 23.33
>
> __builtin_add_overflow is gcc specific. There's a need for a portable
> version that can also be used with other compilers.
>
> This patch introduces __rte_add_overflow_u8, __rte_add_overflow_u16
> and __rte_add_overflow_u32.
Instead of the proposed three type-specific macros, add one generic rte_add_overflow(a, b, res) macro, like rte_bit_test() [1] using "_Generic".
[1]: https://elixir.bootlin.com/dpdk/v24.11.1/source/lib/eal/include/rte_bitops.h#L130
You may still need the type-specific macros as internal helpers for the MSVC implementation.
Furthermore, a 64 bit variant might be useful.
PS: DPDK naming convention typically uses just "8"/"16"/"32" postfix to the function name, not "_u8"/"_u16"/"_u32".
next prev parent reply other threads:[~2025-01-03 8:19 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-02 22:32 [PATCH 0/5] " Andre Muezerie
2025-01-02 22:32 ` [PATCH 1/5] maintainers: " Andre Muezerie
2025-01-02 22:32 ` [PATCH 2/5] lib/eal: " Andre Muezerie
2025-01-03 8:19 ` Morten Brørup [this message]
2025-01-03 20:38 ` Andre Muezerie
2025-01-02 22:32 ` [PATCH 3/5] doc/api: " Andre Muezerie
2025-01-02 22:32 ` [PATCH 4/5] drivers/net: use " Andre Muezerie
2025-01-02 22:32 ` [PATCH 5/5] app/test: add tests for portable versions " Andre Muezerie
2025-01-02 23:51 ` [PATCH 0/5] add portable version " Stephen Hemminger
2025-01-03 0:15 ` Andre Muezerie
2025-01-03 0:41 ` Andre Muezerie
2025-01-03 20:39 ` [PATCH v2 " Andre Muezerie
2025-01-03 20:39 ` [PATCH v2 1/5] maintainers: " Andre Muezerie
2025-01-03 20:39 ` [PATCH v2 2/5] lib/eal: " Andre Muezerie
2025-01-06 11:07 ` Bruce Richardson
2025-01-06 11:21 ` Morten Brørup
2025-01-06 11:34 ` Bruce Richardson
2025-01-06 11:58 ` Morten Brørup
2025-01-03 20:39 ` [PATCH v2 3/5] doc/api: " Andre Muezerie
2025-01-03 20:39 ` [PATCH v2 4/5] drivers/net: use " Andre Muezerie
2025-01-03 20:39 ` [PATCH v2 5/5] app/test: add tests for " Andre Muezerie
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