We use the cvttsd2si (float64-to-int32) instruction to avoid that negative numbers get sign extended in the destination register.

@rodolph: Is sign extension also a thing on arm64? I noticed that also on arm64 a float64-to-int64 instruction is used.

Review URL: https://codereview.chromium.org/1877133004

Cr-Commit-Position: refs/heads/master@{#35466}