[Webkit-unassigned] [Bug 185944] [MIPS] Fix build on MIPS32r1

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=185944

Loïc Yhuel <loic.yhuel at softathome.com> changed:

           What    |Removed                     |Added
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                 CC|                            |loic.yhuel at softathome.com

--- Comment #2 from Loïc Yhuel <loic.yhuel at softathome.com> ---
This looks ok, and builds fine.

Here are the different cases I can think of :
 - -march=mips32 -mfp32 : mtc1/mfc1, OK
 - -march=mips32 -mfpxx (so __mips_isa_rev == 1, __mips_fpr == 0) : "as" would fail with "Error: float register should be even, was xx" (the only way would be to an intermediate memory transfer). Nothing changes here, so I think no one uses this configuration so it's fine if WebKit doesn't support it.
 - -march=mips32r2 -mfp32 : mfhc1 and mthc1 are used even if not necessary, but this isn't an issue
 - -march=mips32r2 -mfpxx : mfhc1 and mthc1, OK
 - -mfp64 : gcc already ensures mfhc1 and mthc1 are available

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