The first paragraph in the ChangeLog entry is for infrastructure that is
shared among the three accessor macro patches.

After doing a global replace of cfun->machine in config and adjusting
formatting, I grepped for '\<machine\>' to check if there was some other
kind of reference.
I've found lots of comments, a few instances of a variable 'machine'  
set to MACHINE_FUNCTION (*cfun), some stuff regarding the   
software-floating point
includes and preprocessor assertions etc, but nothing really relevant.

Bootstrapped in trunk revision 161310; currently undergoing regression  
testing.