I want to permute the 3 lisp arg-passing registers to match the machine ABI
and this change makes it less ugly to do so. (Some DEFINE-ALIEN-ROUTINEs
in user code and SBCL itself could potentially emit fewer moves by matching
the ABI but we also will want to tackle a problem of needless spill/restore
of register args by eliminating dead stores)
Other backends don't strictly benefit from this syntax because register
names such as A0,A1 already express exactly what they mean to, whereas x86
register names are alphabet soup in comparison.
GENERAL INFORMATION
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SYSTEM-SPECIFIC HINTS
for OpenBSD 6.0 and newer:
SBCL must be built and run from a filesystem with the "wxallowed"
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