[PATCH] mips: fix testsuite build for O32 FPXX ABI on pre-R2 CPU

[Joseph Myers]

On Wed, 9 Dec 2015, Aurelien Jarno wrote:

> On MIPS when the toolchain is using the O32 FPXX ABI, the testsuite
> fails to build for pre-R2 CPU.
> 
> It assumes that it is possible to use the -mfp64 option to build
> tst-abi-fp64amod and tst-abi-fp64mod, while this requires a CPU which
> supports the mfhc1 and mthc1 instructions, ie at least a R2 CPU:
> 
>   error: '-mgp32' and '-mfp64' can only be combined if the target
>   supports the mfhc1 and mthc1 instructions
> 
> The same way it assumes that it is possible to use the -modd-spreg option
> to build tst-abi-fpxxomod and tst-abi-fp64mod, while this requires at
> least a R1 CPU:
> 
>   warning: the 'mips2' architecture does not support odd
>   single-precision registers
> 
> This patches changes that by checking the usability of -mfp64 and
> -modd-spreg options in configure, and disable those tests when they can
> not be used.

OK.

-- 
Joseph S. Myers
joseph@codesourcery.com