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Re: [Patch]Extend GAS arm_feature_set struct to provide more available bits
- From: Terry Guo <flameroc at gmail dot com>
- To: Nicholas Clifton <nickc at redhat dot com>
- Cc: Terry Guo <terry dot guo at arm dot com>, binutils at sourceware dot org, Ramana Radhakrishnan <ramana dot radhakrishnan at arm dot com>, Richard Earnshaw <Richard dot Earnshaw at arm dot com>, Alan Modra <amodra at gmail dot com>
- Date: Mon, 16 Mar 2015 14:43:01 +0800
- Subject: Re: [Patch]Extend GAS arm_feature_set struct to provide more available bits
- Authentication-results: sourceware.org; auth=none
- References: <007001d0572b$922edf60$b68c9e20$ at arm dot com> <54FECF9B dot 9010602 at redhat dot com>
On Tue, Mar 10, 2015 at 7:03 PM, Nicholas Clifton <email@example.com> wrote:
> Hi Terry,
>> Currently all 32 bits in core filed of struct arm_feature_set are occupied
>> to represent various features.
> wouldn't it have been easier to just switch to a 64-bit data type ? Just
Thanks for your review and sorry for the later reply.
I am also curious here. As you can see from below URL, the default
mode for gcc 4.7 and 4.8 is still c90 which doesn't support long long.
The long long is supported in c99. So I don't think it is safe to use
long long in gas so far, because there will be errors when you build
long long with host gcc 4.7 or 4.8. I am wondering whether it is
possible to default the mode to c99 for building binutils? This means
explicitly adding -std=c99 when building binutils.