[Mono-devel-list] [PATCH] Use smallest encoding for <alu> eax, imm

Ben Maurer bmaurer at users.sourceforge.net
Fri May 21 23:26:26 EDT 2004


The attached patch uses the smallest possible encoding for operations
such as

add eax, 5

Before we emitted 5 as a 32 bit value in order to save one bit by using
the eax trick -- a foolish trade.


# Before
[benm at Ben mono]$ mono --stats --compile-all /devel/mcs/class/lib/default/mscorlib.dll | grep Native
Native code size:       1429905
# After
[benm at Ben mono]$ mini/mono --stats --compile-all /devel/mcs/class/lib/default/mscorlib.dll | grep Native
Native code size:       1424838

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