[Bug ports/28872] Building glibc for MIPSel single float targets

["archicharmer at mail dot ru" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=28872

--- Comment #15 from Den <archicharmer at mail dot ru> ---
(In reply to Adhemerval Zanella from comment #14)

Zanella, thank you for your support.

> In fact it does exactly what I suggested ... on comment #5.

Well, your patches here just replaces l.d to ldc1 and s.d to sdc1, but as I
replied to your comment#5, the opcodes sdc1/ldc1 (the almost same load/store
double but from/to coprocessor1) are not supported for single float targets as
well. What about lwc1/swc1 and BYTES_PER_WORD? - doubles will not be doubles
after those instructions, right?

By the way, you made a mistake in setjmp_aux.c (s.d and sdc1 instead of l.d and
ldc1). Moreover, the files.c (at least them) can not be compiled when there are
such presentations of LDFPR/STFPR inside asm volatiles. I suppose you just
showed a quick realization.

> $ mips64-linux-gnu/bin/mips64-glibc-linux-gnu-gcc -mabi=32 -mips2
> -mhard-float -mfpxx t.c -o t

Please, while tests, additionally use flag -msingle-float and/or -mfp32 instead
of -mfpxx

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