From: "Andre Vieira (lists)" <andre.simoesdiasvieira@arm.com>
To: Richard Biener <rguenther@suse.de>
Cc: "gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>,
Richard Sandiford <richard.sandiford@arm.com>
Subject: Re: [AArch64] Enable generation of FRINTNZ instructions
Date: Mon, 29 Nov 2021 11:17:42 +0000 [thread overview]
Message-ID: <1885dad0-3b03-d452-6615-8fed15b273a1@arm.com> (raw)
In-Reply-To: <85sr96q-o3s-602o-3436-40713n68pp84@fhfr.qr>
On 18/11/2021 11:05, Richard Biener wrote:
>
> + (if (!flag_trapping_math
> + && direct_internal_fn_supported_p (IFN_TRUNC, type,
> + OPTIMIZE_FOR_BOTH))
> + (IFN_TRUNC @0)))))
> #endif
>
> does IFN_FTRUNC_INT preserve the same exceptions as doing
> explicit intermediate float->int conversions? I think I'd
> prefer to have !flag_trapping_math on both cases.
I realized I never responded to this. The AArch64 instructions mimic the
behaviour you'd see if you were doing explicit conversions, so I'll be
defining the new IFN and optab to require the same, such that these can
be used by the compiler when flag_trapping_math. In the patch I sent
last I added some likes to the md.texi description of the optab to that
intent.
prev parent reply other threads:[~2021-11-29 11:17 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-11 17:51 Andre Vieira (lists)
2021-11-12 10:56 ` Richard Biener
2021-11-12 11:48 ` Andre Simoes Dias Vieira
2021-11-16 12:10 ` Richard Biener
2021-11-17 13:30 ` Andre Vieira (lists)
2021-11-17 15:38 ` Richard Sandiford
2021-11-18 11:05 ` Richard Biener
2021-11-22 11:38 ` Andre Vieira (lists)
2021-11-22 11:41 ` Richard Biener
2021-11-25 13:53 ` Andre Vieira (lists)
2021-12-07 11:29 ` Andre Vieira (lists)
2021-12-17 12:44 ` Richard Sandiford
2021-12-29 15:55 ` Andre Vieira (lists)
2021-12-29 16:54 ` Richard Sandiford
2022-01-03 12:18 ` Richard Biener
2022-01-10 14:09 ` Andre Vieira (lists)
2022-01-10 14:45 ` Richard Biener
2022-01-14 10:37 ` Richard Sandiford
2022-11-04 17:40 ` Andre Vieira (lists)
2022-11-07 11:05 ` Richard Biener
2022-11-07 14:19 ` Andre Vieira (lists)
2022-11-07 14:56 ` Richard Biener
2022-11-09 11:33 ` Andre Vieira (lists)
2022-11-15 18:24 ` Richard Sandiford
2022-11-16 12:25 ` Richard Biener
2021-11-29 11:17 ` Andre Vieira (lists) [this message]
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