Re: [PATCH 7/9] LoongArch: Tweak CFLAGS for Clang compatibility

From: Xi Ruoyao
Date: Fri Jun 23 2023 - 13:00:45 EST


On Fri, 2023-06-23 at 21:43 +0800, WANG Xuerui wrote:

> -cflags-y                       += -G0 -pipe -msoft-float

-msoft-float should not be removed. Our consensus (made when I was
developing https://gcc.gnu.org/r13-6500) is -mabi=lp64s does *not*
disable floating point instructions, but only disable FPRs for passing
arguments and return values. So w/o -msoft-float (or -mfpu=none) GCC is
allowed to generate FP instructions everywhere in kernel and it may
cause kernel FPD exception in the future.

--
Xi Ruoyao <xry111@xxxxxxxxxxx>
School of Aerospace Science and Technology, Xidian University