On 02/12/2022 05:41, John Naylor wrote:
>> I couldn't find something more official for the sse2neon library part.
> Not quite sure what this is referring to, but it seems we can just point to
> the __aarch64__ section in the same file, which uses the same instruction:
>
> spin_delay(void)
> {
> __asm__ __volatile__(
> " isb; \n");
> }
>
> ...and which already explains the choice with a comment.
Good point. Will add the comment.
> + if cc.get_id() == 'msvc'
> + cdata.set('USE_ARMV8_CRC32C', false)
> + cdata.set('USE_ARMV8_CRC32C_WITH_RUNTIME_CHECK', 1)
> + have_optimized_crc = true
> + else
>
> That seems like a heavy-handed way to force it. Could we just use the same
> gating in the test program that the patch puts in the code of interest?
> Namely:
>
> +#ifndef _MSC_VER
> #include <arm_acle.h>
> +#endif
I took a similar approach as x86 MSVC code. I don't think the test
program would work with MSVC. The compiler options are not MSVC friendly.
--
Niyas