• Sigurd Schneider's avatar
    [turbofan] Support kRootRegisterBias on all platforms · ba39d635
    Sigurd Schneider authored
    We had a kRootRegisterBias on x64 before. This CL ports the feature to
    all other platforms as well. The root register bias is helpful to adjust
    the value of the root register, which allows to better utilize signed
    immediate offset constants in load instructions.
    
    We currently use a separate add instruction to add kRootRegisterBias
    in the code that initializes the root register. This could be improved
    by adding a custom relocation mode ensuring that instead of the root
    address, the root address plus the bias is inserted (and in this way
    the add instruction can be omitted).
    
    Bug: v8:6666
    Change-Id: I55cf02ab85d11e3c6d0d83a8f7905dbf924890f1
    Reviewed-on: https://chromium-review.googlesource.com/1113539
    Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
    Reviewed-by: 's avatarJakob Gruber <jgruber@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#54023}
    ba39d635
macro-assembler-ppc.cc 94.7 KB