[Vm-dev] [OpenSmalltalk/opensmalltalk-vm] 966a92: CogVM source as per VMMaker.oscog-eem.3244

[Eliot Miranda]

  Branch: refs/heads/Cog
  Home:   https://github.com/OpenSmalltalk/opensmalltalk-vm
  Commit: 966a9280e10d0335b6c9cd7f2f837d86c2026e2d
      https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/966a9280e10d0335b6c9cd7f2f837d86c2026e2d
  Author: Eliot Miranda <eliot.miranda at gmail.com>
  Date:   2022-08-02 (Tue, 02 Aug 2022)

  Changed paths:
    M src/plugins/SqueakFFIPrims/ARM64AppleFFIPlugin.c
    M src/plugins/SqueakFFIPrims/ARM64FFIPlugin.c
    M src/plugins/SqueakFFIPrims/RiscV64FFIPlugin.c

  Log Message:
  -----------
  CogVM source as per VMMaker.oscog-eem.3244

ThreadedARM64FFIPlugin & ThreadedRiscV64FFIPlugin:
Ugh; cuz of inlining ffiCalloutTo:SpecOnStack:in: twice into
primitiveCallout[WithArgs] due to COGMTVM, the anonymous union used to
process float and double vector returns causes the C compiler to barf.
So introduce a proper type for this (ThreadedFFI64Bit32ByteReturnDF).