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    • Milad Fa's avatar
      PPC/s390: Reland "[wasm][memory64] Prepare Liftoff for ptrsize offsets" · 794c2305
      Milad Fa authored 
      Port 1da429fb

Original Commit Message:

    This is a reland of 800307f6, with a
    minimal fix for arm64 (uint64_t -> uintptr_t).

    Original change's description:
    > [wasm][memory64] Prepare Liftoff for ptrsize offsets
    >
    > This CL prepares the LiftoffAssembler interface for uintptr_t offsets.
    > Many places can still only handle 32-bit values, but after this CL we can
    > start storing the offsets as uintptr_t in the memory access immediates.
    > Some TODOs are placed to extend code generation for 64-bit additions, if
    > memory64 is enabled.
    > All of this will be addressed in follow-up CLs.
    >
    > R=manoskouk@chromium.org
    >
    > Bug: v8:10949
    > Change-Id: Id3b9b8aa555ab41f082ba012f4f8d80586c35b89
    > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2529452
    > Commit-Queue: Clemens Backes <clemensb@chromium.org>
    > Reviewed-by: Manos Koukoutos <manoskouk@chromium.org>
    > Cr-Commit-Position: refs/heads/master@{#71236}

R=clemensb@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
BUG=
LOG=N

Change-Id: I87a421ab1fe6e4d0f2098c24ff34a3888631722e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2552166Reviewed-by: 's avatarJunliang Yan <junyan@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#71317}
      794c2305
  37. 22 Oct, 2020 1 commit
    • Milad Fa's avatar
      PPC/s390: [wasm] Use int type for small offsets · d9829b92
      Milad Fa authored 
      Port ba564604

Original Commit Message:

    The uint32_t type can easily be confused with the memory offsets that
    are currently 32 bit and will become 64 bit with the memory64 proposal.
    Since the offsets into the instance are always small anyway, the type of
    the integer does not really matter, and we should stick to the default
    'int'.

R=clemensb@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
BUG=
LOG=N

Change-Id: Icfc3b4172984c81355ca4b69b67433892cca7408
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2491107Reviewed-by: 's avatarJunliang Yan <junyan@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#70720}
      d9829b92
  39. 19 Oct, 2020 1 commit
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  55. 18 Aug, 2020 1 commit
    • Milad Farazmand's avatar
      PPC/s390: [wasm][arm][arm64][liftoff] Allow loads from negative indices · 2638328d
      Milad Farazmand authored 
      Port 4765c70f

Original Commit Message:

    On arm, the root register points into the middle of the roots array to
    allow to use the full int12_t offset range. Therefore some offsets into
    the root array are negative. This CL changes the liftoff assembler for
    arm to allow loads from negative offsets.

    On arm64, offsets can also be negative when pointer compression is
    disabled.

    Additionally this CL changes the signature of
    LiftoffAssembler::LoadTaggedPointer from uint32_t to int32_t to allow
    the LiftoffCompiler to provide negative indices.

    This CL does not come with a separate test yet. However, this changes is
    needed for https://crrev.com/c/2352784. Where there will also be a test.

R=ahaas@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: Ie286b0169a5f7a1de90e0ec7002bfac83383ea6c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2363127Reviewed-by: 's avatarAndreas Haas <ahaas@chromium.org>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#69456}
      2638328d
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