From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Petazzoni Date: Wed, 29 May 2019 09:57:39 +0200 Subject: [Buildroot] [PATCH V3 03/10] arch/csky: Add FLOAT_ABI compiler options In-Reply-To: References: <1559114328-23357-1-git-send-email-guoren@kernel.org> <1559114328-23357-4-git-send-email-guoren@kernel.org> <20190529092307.6c78996b@windsurf.home> Message-ID: <20190529095739.18d4d3c8@windsurf.home> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Hello, On Wed, 29 May 2019 15:30:14 +0800 Guo Ren wrote: > > What is abiv1 vs. abiv2 ? Also, in your next commit, abiv1 is > > apparently used for ck610, but here this BR2_GCC_TARGET_FLOAT_ABI is > > defined for all cases, which seems to contradict your commit log. > abiv1 contain: ck610 > abiv2 contain: ck807 ck810 ck860 > > Abiv1 is almost the same as mcore and it's ELF_CODE is 39 > Abiv2 is C-SKY own ISA and it's ELF_CODE is 252 > > We don't support FPU in abiv1, because its opcode width is only > 16-bits and we don't want to continue developing it. Ah, and indeed BR2_CSKY_FPU cannot be selected for BR2_ck610. Please explain all of this in the commit log. Thanks! Thomas -- Thomas Petazzoni, CTO, Bootlin Embedded Linux and Kernel engineering https://bootlin.com