Reland "[wasm-simd][liftoff] Compile double precision conversions"
This is a reland of fe00fbd9 Original change's description: > [wasm-simd][liftoff] Compile double precision conversions > > I missed actually handling these instructions in liftoff-compiler, so > even though the assembler functions were implemented for all archs, we > weren't running them. > > This properly handles the instructions and a couple of fixes: > > - for arm64, typos in using signed instructions for unsigned Wasm ops > - for arm, handle the case where dst == src, which leads to us > overwriting src and then reading junk from the overwritten portions to > convert > > Bug: v8:11265 > Change-Id: I7919280bdf395137e95075deb30ed815100df222 > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2728382 > Reviewed-by: Clemens Backes <clemensb@chromium.org> > Reviewed-by: Deepti Gandluri <gdeepti@chromium.org> > Commit-Queue: Zhi An Ng <zhin@chromium.org> > Cr-Commit-Position: refs/heads/master@{#73178} Bug: v8:11265 Change-Id: Ib854b526e74710f03e83d5007e3a3f501363ce86 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2733661Reviewed-by: Clemens Backes <clemensb@chromium.org> Reviewed-by: Deepti Gandluri <gdeepti@chromium.org> Commit-Queue: Zhi An Ng <zhin@chromium.org> Cr-Commit-Position: refs/heads/master@{#73206}
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