• Milad Farazmand's avatar
    PPC/s390: Reland "[wasm-simd][liftoff][x64][ia32] Implement load extend" · 47513717
    Milad Farazmand authored
    Port 6b228044
    
    Original Commit Message:
    
        This is a reland of dd19a400
    
        Original change's description:
        > [wasm-simd][liftoff][x64][ia32] Implement load extend
        >
        > The operations are implemented:
        >
        > - i16x8.load8x8_s
        > - i16x8.load8x8_u
        > - i32x4.load16x4_s
        > - i32x4.load16x4_u
        > - i64x2.load32x2_s
        > - i64x2.load32x2_u
        >
        > on x64 and i32. The rest of the arch currently bail out, and will be
        > implemented in subsequent patches.
        >
        > The liftoff-compiler.cc code looks very similar to the one for LoadMem,
        > the only difference is special handling of kSplat v.s. kExtend. kExtend
        > always loads 8 bytes, so the bounds check and tracing is different.
        > Compared to LoadMem there is less need for pinning, since the result is
        > always going to be in a SIMD/FP register, which is different from the
        > index/addr register.
        >
        > The enum LoadTransformationKind was moved from
        > function-body-decoder-impl.h to function-body-decoder.h so that no
        > unncessary header file inclusions were needed to liftoff, and also it's
        > a better place for it to live.
        >
        > Bug: v8:9909
        > Change-Id: I926bcc01c0c3c860223e8c08f91bc4ab3b75c399
        > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2203730
        > Commit-Queue: Zhi An Ng <zhin@chromium.org>
        > Reviewed-by: Clemens Backes <clemensb@chromium.org>
        > Cr-Commit-Position: refs/heads/master@{#67914}
    
    R=zhin@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
    BUG=
    LOG=N
    
    Change-Id: I2745871868afc1e6120197ad3ad138c89d47521e
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2210764Reviewed-by: 's avatarJunliang Yan <jyan@ca.ibm.com>
    Reviewed-by: 's avatarZhi An Ng <zhin@chromium.org>
    Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
    Cr-Commit-Position: refs/heads/master@{#67933}
    47513717
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