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Backport simd fixes to 0.38.0 #4334

Merged
merged 2 commits into from
Jun 27, 2022

Commits on Jun 27, 2022

  1. x64: Fix codegen for the i8x16.swizzle instruction (bytecodeallianc…

    …e#4318)
    
    This commit fixes a mistake in the `Swizzle` opcode implementation in
    the x64 backend of Cranelift. Previously an input register was casted to
    a writable register and then modified, which I believe instructions are
    not supposed to do. This was discovered as part of my investigation
    into bytecodealliance#4315.
    alexcrichton committed Jun 27, 2022
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  2. x64: Fix codegen for the select instruction with v128 (bytecodealli…

    …ance#4317)
    
    This commit fixes a bug in the previous codegen for the `select`
    instruction when the operations of the `select` were of the `v128` type.
    Previously teh `XmmCmove` instruction only stored an `OperandSize` of 32
    or 64 for a 64 or 32-bit move, but this was also used for these 128-bit
    types which meant that when used the wrong move instruction was
    generated. The fix applied here is to store the whole `Type` being moved
    so the 128-bit variant can be selected as well.
    alexcrichton committed Jun 27, 2022
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