• mbrandy's avatar
    PPC: [wasm] Int64Lowering of Int64Sub. · eb0a2324
    mbrandy authored
    Port 33c08596
    
    Original commit message:
        Int64Sub is lowered to a new turbofan operator, Int32SubPair. The new
        operator takes 4 inputs an generates 2 outputs. The inputs are the low
        word of the left input, high word of the left input, the low word of the
        right input, and high word of the right input. The ouputs are the low
        and high word of the result of the subtraction.
    
        The implementation is very similar to the implementation of Int64Add.
    
    R=ahaas@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
    BUG=
    
    Review URL: https://codereview.chromium.org/1812473002
    
    Cr-Commit-Position: refs/heads/master@{#34821}
    eb0a2324
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