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mu/linux/ex3.subx

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4808 - clean up comments in all subx files
2018-12-01 00:45:15 +00:00
# Add the first 10 numbers, and return the result in the exit code.
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2018-07-24 18:53:45 +00:00
#
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2019-08-20 06:45:04 +00:00
# To run:
.
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# $ bootstrap/bootstrap translate ex3.subx -o ex3
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# $ bootstrap/bootstrap run ex3
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 $?
# 55
4324 - new example: add first ten numbers Result has to be small enough to fit in AL so exit() can return it.
2018-07-07 21:31:56 +00:00
5647 - experimental support for swapping OS
2019-09-12 02:04:49 +00:00
== code
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
# instruction effective address register displacement immediate
# . op subop mod rm32 base index scale r32
# . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes
4780
2018-11-26 08:26:20 +00:00
5410 - 4 examples passing Clean up other examples as well to satisfy the requirements in commit 5404.
2019-07-17 07:47:11 +00:00
Entry:
5592 - switch register names to lowercase
2019-08-26 18:55:26 +00:00
# result: ebx = 0
bb/copy-to-ebx 0/imm32
# counter: ecx = 1
b9/copy-to-ecx 1/imm32
4324 - new example: add first ten numbers Result has to be small enough to fit in AL so exit() can return it.
2018-07-07 21:31:56 +00:00
4512 - divide labels into two categories Targets you can jump to and ones you can call are conceptually disjoint sets. I'm highlighting these in Vim, but it's a pretty complex pattern. Arguably errors shouldn't be highlighted. Only warnings that are easy to be accidentally deployed.
2018-08-13 04:04:14 +00:00
$loop:
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2019-02-15 00:24:20 +00:00
# if (counter > 10) break
5592 - switch register names to lowercase
2019-08-26 18:55:26 +00:00
81 7/subop/compare 3/mod/direct 1/rm32/ecx . . . . . 0xa/imm32 # compare ecx
5897 - rename comparison instructions Signed and unsigned don't quite capture the essence of what the different combinations of x86 flags are doing for SubX. The crucial distinction is that one set of comparison operators is for integers and the second is for addresses.
2020-01-17 02:31:12 +00:00
7f/jump-if-> $exit/disp8
4801 Reindent all SubX code to make some room for the new comment style.
2018-11-30 18:54:42 +00:00
# result += counter
5592 - switch register names to lowercase
2019-08-26 18:55:26 +00:00
01/add 3/mod/direct 3/rm32/ebx . . . 1/r32/ecx . . # add ecx to ebx
4801 Reindent all SubX code to make some room for the new comment style.
2018-11-30 18:54:42 +00:00
# ++counter
5592 - switch register names to lowercase
2019-08-26 18:55:26 +00:00
41/increment-ecx
4801 Reindent all SubX code to make some room for the new comment style.
2018-11-30 18:54:42 +00:00
# loop
eb/jump $loop/disp8
4324 - new example: add first ten numbers Result has to be small enough to fit in AL so exit() can return it.
2018-07-07 21:31:56 +00:00
4512 - divide labels into two categories Targets you can jump to and ones you can call are conceptually disjoint sets. I'm highlighting these in Vim, but it's a pretty complex pattern. Arguably errors shouldn't be highlighted. Only warnings that are easy to be accidentally deployed.
2018-08-13 04:04:14 +00:00
$exit:
5647 - experimental support for swapping OS
2019-09-12 02:04:49 +00:00
# exit(ebx)
e8/call syscall_exit/disp32
5410 - 4 examples passing Clean up other examples as well to satisfy the requirements in commit 5404.
2019-07-17 07:47:11 +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