Currently coding in binary code is necessary?
I have already answered to that: No, except for a few extremely rare
situations, writing binary opcodes manually is not necessary, because
you can use the assembler to create the code.
The only case where you have to resort to writing binary code manually
is when the assembler cannot output the desired code for some reason. If
I recall correctly, there is only one such case in the HelenOS sources:
http://trac.helenos.org/browser/mainline/kernel/arch/mips32/include/debug.h?rev=mainline%2C1446.3.1
Here we manually encode the opcodes of five special debugging
instructions for the MSIM MIPS simulator (these instructions are not
part of the standard MIPS ISA, thus the assembler does not know them).
M.D.
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