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| author | Kartik K. Agaram <vc@akkartik.com> | 2021-07-16 08:09:42 -0700 |
|---|---|---|
| committer | Kartik K. Agaram <vc@akkartik.com> | 2021-07-16 08:28:56 -0700 |
| commit | 44d26b77c45668c9b0c99894a4294cec004361fe (patch) | |
| tree | 68a5dcd4971873efd4ce184e9bf9a531c2161813 /linux/ex3.subx | |
| parent | ac45f097153afd3a89f43886e4124c5b2c26b98a (diff) | |
| download | mu-44d26b77c45668c9b0c99894a4294cec004361fe.tar.gz | |
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Diffstat (limited to 'linux/ex3.subx')
| -rw-r--r-- | linux/ex3.subx | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/linux/ex3.subx b/linux/ex3.subx deleted file mode 100644 index 5b74d76c..00000000 --- a/linux/ex3.subx +++ /dev/null @@ -1,36 +0,0 @@ -# Add the first 10 numbers, and return the result in the exit code. -# -# To run: -# $ bootstrap/bootstrap translate ex3.subx -o ex3 -# $ bootstrap/bootstrap run ex3 -# Expected result: -# $ echo $? -# 55 - -== code -# instruction effective address register displacement immediate -# . op subop mod rm32 base index scale r32 -# . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes - -Entry: - # result: ebx = 0 - bb/copy-to-ebx 0/imm32 - # counter: ecx = 1 - b9/copy-to-ecx 1/imm32 - -$loop: - # if (counter > 10) break - 81 7/subop/compare 3/mod/direct 1/rm32/ecx . . . . . 0xa/imm32 # compare ecx - 7f/jump-if-> $exit/disp8 - # result += counter - 01/add 3/mod/direct 3/rm32/ebx . . . 1/r32/ecx . . # add ecx to ebx - # ++counter - 41/increment-ecx - # loop - eb/jump $loop/disp8 - -$exit: - # exit(ebx) - e8/call syscall_exit/disp32 - -# . . vim:nowrap:textwidth=0 |