mu/subx/examples/ex2.subx

# Add 1 and 1, and return the result in the exit code.
#
# To run (from the subx directory):
#   $ subx translate examples/ex2.subx -o examples/ex2
#   $ subx run examples/ex2
# Expected result:
#   $ echo $?
#   2

== code

# EBX = 1
bb/copy-to-EBX  1/imm32
# increment EBX
43/inc-EBX
# syscall(exit, EBX)
b8/copy-to-EAX  1/imm32/exit
cd/syscall  0x80/imm8

# . . vim:nowrap:textwidth=0
4808 - clean up comments in all subx files 2018-12-01 00:45:15 +00:00			`# Add 1 and 1, and return the result in the exit code.`
4392 2018-07-24 18:53:45 +00:00			`#`
4639 2018-10-01 19:28:30 +00:00			`# To run (from the subx directory):`
			`# $ subx translate examples/ex2.subx -o examples/ex2`
			`# $ subx run examples/ex2`
4396 Fix ex4 binary, which has been corrupted in the repo since commit 4356. In this time it hasn't changed further. The correct version added here is also the file that should have been committed then. 2018-07-25 03:39:59 +00:00			`# Expected result:`
			`# $ echo $?`
			`# 2`
4317 - example program: simple addition 2018-07-07 06:34:10 +00:00
4531 - automatically compute segment addresses 2018-09-01 22:58:53 +00:00			`== code`
4780 2018-11-26 08:26:20 +00:00
4808 - clean up comments in all subx files 2018-12-01 00:45:15 +00:00			`# EBX = 1`
4669 2018-10-06 04:50:20 +00:00			`bb/copy-to-EBX 1/imm32`
4808 - clean up comments in all subx files 2018-12-01 00:45:15 +00:00			`# increment EBX`
4669 2018-10-06 04:50:20 +00:00			`43/inc-EBX`
4808 - clean up comments in all subx files 2018-12-01 00:45:15 +00:00			`# syscall(exit, EBX)`
4881 2018-12-28 16:56:21 +00:00			`b8/copy-to-EAX 1/imm32/exit`
4669 2018-10-06 04:50:20 +00:00			`cd/syscall 0x80/imm8`
4317 - example program: simple addition 2018-07-07 06:34:10 +00:00
4802 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 2018-11-30 19:10:44 +00:00			`# . . vim:nowrap:textwidth=0`