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We only can't use rm32=5 when mod=0. Totally fine when it's mod=1.
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New helper: printing a string to a buffered file.
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Let's standardize to use opcode 39 rather than 3b by default.
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Let's start adding ':end' labels in all functions, just because it helps
us visualize where function calls end in traces, thanks to the '--map'
commandline argument.
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Some automated commenting cleanup. Still needs more careful manual scanning.
sed -i 's/^# 1-3/# . 1-3/' *.subx */*.subx
sed -i 's/^# op/# . op/' *.subx */*.subx
sed -i 's/# vim/# . . vim/' *.subx */*.subx
sed -i 's/^ # push args/ # . . push args/' *.subx */*.subx
sed -i 's/^ # discard args/ # . . discard args/' *.subx */*.subx
sed -i 's/^ # call/ # . . call/' *.subx */*.subx
sed -i 's/^ # prolog/ # . prolog/' *.subx */*.subx
sed -i 's/^ # epilog/ # . epilog/' *.subx */*.subx
sed -i 's/^ # save registers/ # . save registers/' *.subx */*.subx
sed -i 's/^ # restore registers/ # . restore registers/' *.subx */*.subx
sed -i 's/ operand / register /' *.subx */*.subx
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Reindent all SubX code to make some room for the new comment style.
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Crenshaw compiler now runs natively as well.
It turns out I was misreading the Intel manual, and the jump instructions
that I thought take disp16 operands actually take disp32 operands by default
on both i686 and x86_64 processors. The disp16 versions are some holdover
from the 16-bit days.
This was the first time I've used one of these erstwhile-disp16 instructions,
but I still haven't tested most of them. We'll see if we run into future
issues.
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Start with an exactly corresponding version to Crenshaw 2-1: single-digit
numbers. The only change: we assume the number is in hex.
The next version now supports multi-digit hex numbers.
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