[llvm-dev] [libunwind][Mips] Problem using gas to assemble UnwindRegistersSave.S

[Daniel Sanders via llvm-dev]

> The integrated assembler works great. It was gas that complained.
> Apparently gas must default to MIPS I

That depends on the exact toolchain you have since the default is often overridden but the default-default is MIPS-I. Clang defaults to MIPS32R2/MIPS64R2 depending on the triple at the moment.

> Should the integrated assembler be enabled by default for the Mips?

Not yet. There's a number of quiet mis-assembly bugs at the moment. The plan is to switch it on once it's good enough for the Linux kernel and see what bug reports come back.

> -----Original Message-----
> From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] On Behalf Of
> Richard Pennington via llvm-dev
> Sent: 28 September 2015 00:52
> To: Vasileios Kalintiris; llvm-dev at lists.llvm.org
> Subject: Re: [llvm-dev] [libunwind][Mips] Problem using gas to assemble
> UnwindRegistersSave.S
> 
> On 09/27/2015 06:41 PM, Vasileios Kalintiris wrote:
> > Hi Richard,
> >
> > Clang doesn't have support for MIPS I. The trap-on-condition instructions
> were added in MIPS II and they should work fine. This is why it works with
> ".set mips32r2".
> >
> > Which version of the ISA did you specify when you used the integrated
> assembler?
> >
> > Thanks,
> > Vasileios
> >
> >
> Hi Vasileios,
> 
> The integrated assembler works great. It was gas that complained.
> Apparently gas must default to MIPS I
> 
> -Rich
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