• Ng Zhi An's avatar
    [wasm-simd][liftoff] Implement bitselect · 6bbcdc3d
    Ng Zhi An authored
    Tweak the register allocation logic in liftoff-compiler.cc. If we reuse
    src1 or src2 for dst, it complicates the logic in the codegen
    significantly. We will need to check which operand dst is equals to,
    back it up, then make sure the mask ends up in dst (since thats how vbsl
    and bsl works, the first operand holds the mask and is overwritten). By
    tweaking the allocation logic, no code gen is required for the other
    backends.
    
    Bug: v8:9909
    Change-Id: I17843322508b18247c91e5959cf1b996b7f6a61d
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2171468
    Commit-Queue: Zhi An Ng <zhin@chromium.org>
    Reviewed-by: 's avatarClemens Backes <clemensb@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#67481}
    6bbcdc3d
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