[Webkit-unassigned] [Bug 175447] Implement MacroAssembler::probe support on MIPS.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=175447

--- Comment #1 from Mark Lam <mark.lam at apple.com> ---
What needs to be done:
1. Copy the implementation of ctiMasmProbeTrampoline in MacroAssemblerARM.cpp into a MacroAssemblerMIPS.cpp file.  Alternatively, you may choose from MacroAssemblerARMv7.cpp, MacroAssemblerARM64.cpp, or MacroAssemblerX86Common.cpp if those are easier to work with.
2. Make sure that the COMPILE_ASSERT and static_asserts are in effect.
   This is needed to ensure that the asm code will populate the ProbeContext the way that C++ code expect it to.
3. Change the implementation to MacroAssembler::probe() into the MIPS equivalent.
4. Change the inline asm instructions in ctiMasmProbeTrampoline into the MIPS equivalent.
5. Change the part for calling a C function in ctiMasmProbeTrampoline to follow MIPS calling convention.
6. Run the testmasm test to validate the fix works before committing.

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