From: Paul Campbell <taniwha@gmail.com>
To: linux-riscv@lists.infradead.org
Subject: prefetchw()
Date: Sun, 27 Jun 2021 15:31:18 +1200 [thread overview]
Message-ID: <2623321.7s5MMGUR32@rata> (raw)
i noticed today that __builtin_prefetch() emits nothing (at least in my gcc)
i wonder if it makes sense to do this for riscv linux?
static inline void prefetchw( volatile void *addr)
{
asm volatile("lb x0, 0(%0)" : : "r" (addr));
}
Paul
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next reply other threads:[~2021-06-27 3:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-27 3:31 Paul Campbell [this message]
2021-06-27 3:44 ` prefetchw() Paul Campbell
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