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| author | Kartik Agaram <vc@akkartik.com> | 2018-10-01 15:18:00 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2018-10-01 15:18:00 -0700 |
| commit | f872f7c726c45b96ee5d3a899915fc3bde26f942 (patch) | |
| tree | d0e11160c026bec28940cb420fc7014c424a7a08 /subx/examples | |
| parent | 4224ec8188bc0e6f27e7063a8f5ec3355e892570 (diff) | |
| download | mu-f872f7c726c45b96ee5d3a899915fc3bde26f942.tar.gz | |
4643
Diffstat (limited to 'subx/examples')
| -rw-r--r-- | subx/examples/ex7.subx | 4 | ||||
| -rw-r--r-- | subx/examples/ex8.subx | 18 |
2 files changed, 11 insertions, 11 deletions
diff --git a/subx/examples/ex7.subx b/subx/examples/ex7.subx index d0e5d415..7d610410 100644 --- a/subx/examples/ex7.subx +++ b/subx/examples/ex7.subx @@ -4,8 +4,8 @@ # the character read. # # To run (from the subx directory): -# $ subx translate examples/ex8.subx -o examples/ex8 -# $ subx run examples/ex8 +# $ subx translate examples/ex7.subx -o examples/ex7 +# $ subx run examples/ex7 # Expected result: # $ echo $? # 97 diff --git a/subx/examples/ex8.subx b/subx/examples/ex8.subx index e3c578c0..274ff6a2 100644 --- a/subx/examples/ex8.subx +++ b/subx/examples/ex8.subx @@ -26,28 +26,28 @@ # call e8/call ascii_length/disp32 # discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add 4 to ESP + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add 4 to ESP # exit(EAX) - 89/copy 3/mod/direct 3/rm32/EBX . . . 0/r32/EAX . . # copy EAX to EBX - b8/copy . . . . . . . 1/imm32/exit # copy 1 to EAX + 89/copy 3/mod/direct 3/rm32/EBX . . . 0/r32/EAX . . # copy EAX to EBX + b8/copy . . . . . . . 1/imm32/exit # copy 1 to EAX cd/syscall 0x80/imm8 ascii_length: # (s) # initialize s (EDX) - 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none 2/r32/EDX 4/disp8 # copy *(ESP+4) to EDX + 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none 2/r32/EDX 4/disp8 # copy *(ESP+4) to EDX # var result = 0 (EAX) - b8/copy . . . . . . . 0/imm32 # copy 0 to EAX + b8/copy . . . . . . . 0/imm32 # copy 0 to EAX $ascii_length_loop: # var c = *s (ECX) - 8a/copy 0/mod/* 2/rm32/EDX . . . 1/r32/ECX . . # copy byte at *EDX to lower byte of ECX + 8a/copy 0/mod/* 2/rm32/EDX . . . 1/r32/ECX . . # copy byte at *EDX to lower byte of ECX # if c == '\0' break - 81 7/subop/compare 3/mod/direct 1/rm32/ECX . . . . . 0/imm32 # compare ECX with 0 + 81 7/subop/compare 3/mod/direct 1/rm32/ECX . . . . . 0/imm32 # compare ECX with 0 74/jump-if-equal $ascii_length_ret/disp8 # ++s - 81 0/subop/add 3/mod/direct 2/rm32/EDX . . . . . 1/imm32 # add 1 to EDX + 81 0/subop/add 3/mod/direct 2/rm32/EDX . . . . . 1/imm32 # add 1 to EDX # ++result - 81 0/subop/add 3/mod/direct 0/rm32/EAX . . . . . 1/imm32 # add 1 to EAX + 81 0/subop/add 3/mod/direct 0/rm32/EAX . . . . . 1/imm32 # add 1 to EAX # loop eb/jump $ascii_length_loop/disp8 $ascii_length_ret: |