On Mon, 14 May 2018 07:14:40 -0500, Tom Marchant <m42tom-ibmm...@yahoo.com> 
wrote:

>In all of this, I don't remember the OP ever mentioning saving and restoring 
>the 64-bit registers. Without doing that the calling conventions are violated, 
>and you are breaking any AMODE(64) caller.

The intention was for this to be used by a 32-bit
program, that only executes 32-bit instructions,
that only ever change 32-bit registers, which
means that you only need to save and restore
32-bit registers.

BFN. Paul.

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