• bmeurer's avatar
    [x64] Match -0 - x with sign bit flip. · a1b2c275
    bmeurer authored
    We can use xorps/xorpd on Intel CPUs to flip the sign bit. Ideally we'd
    use a RIP-relative 128-bit constant in the code object, as OCaml/GCC
    does, however that requires 128-bit alignment for code objects, which is
    not yet implemented. So for now we materialize the mask inline.
    
    R=dcarney@chromium.org
    
    Review URL: https://codereview.chromium.org/1046893002
    
    Cr-Commit-Position: refs/heads/master@{#27611}
    a1b2c275
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