Ed Jaffe writes:
So, we updated our stacking mechanism to unconditionally save the high
halves of 15-1 as part of *every* calling sequence just to be safe.
and this is very good implicit advice.
There are indeed many situations---notably when C, COBOL, or, in particular,
Java is in use---in which it is wise to save the contents of the
floating-point registers too. The old rule---If I'm not going to use them
I need not save them---is now too risky.
John Gilmore
Ashland, MA 01721-1817
USA
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