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Subject: Re: [PATCH v2 1/3] LoongArch: Fix usage of LSX and LASX frint/ftint
 instructions [PR112578]
From: Xi Ruoyao <xry111@xry111.site>
To: gcc-patches@gcc.gnu.org
Cc: chenglulu <chenglulu@loongson.cn>, i@xen0n.name, xuchenghua@loongson.cn
Date: Mon, 20 Nov 2023 03:26:20 +0800
In-Reply-To: <20231119143037.16443-2-xry111@xry111.site>
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On Sun, 2023-11-19 at 22:30 +0800, Xi Ruoyao wrote:
> +;; All these are controlled by -ffp-int-builtin-inexact.
> +(define_int_attr simd_frint_pattern
> +=C2=A0 [(UNSPEC_SIMD_FRINTRP		"ceil")
> +=C2=A0=C2=A0 (UNSPEC_SIMD_FRINTRZ		"btrunc")
> +=C2=A0=C2=A0 (UNSPEC_SIMD_FRINT		"nearbyint")
> +=C2=A0=C2=A0 (UNSPEC_SIMD_FRINTRNE	"roundeven")
> +=C2=A0=C2=A0 (UNSPEC_SIMD_FRINTRM		"floor")])

This is wrong.  nearbyint is not allowed to raise FE_INEXACT even if -
ffp-int-builtin-inexact.  Please abandon this series and I'll send V3.

--=20
Xi Ruoyao <xry111@xry111.site>
School of Aerospace Science and Technology, Xidian University