[Webkit-unassigned] [Bug 185464] [MIPS] Use mfhc1 and mthc1 to fix assembler error

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed May 23 08:40:38 PDT 2018


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

           What    |Removed                     |Added
                 CC|                            |loic.yhuel at softathome.com,
                   |                            |olivier.blin at softathome.com

--- Comment #6 from Loïc Yhuel <loic.yhuel at softathome.com> ---
This change breaks the build on MIPS32r1 (which doesn't support mfhc1 and mthc1).

I assume the assembler error was on a -mfpxx or -mfp64 target, which runs (or should be able to run for -mfpxx) with FR=1 (f0..f31 are independent 64 bit registers).

The original code is fine with -mfp32, running with FR=0 (f0..f31 are 32 bit registers, instructions operating on double use two even+odd register), which is the only mode supported on MIPS32r1.


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