diff options
| author | Kartik Agaram <vc@akkartik.com> | 2019-01-06 12:51:49 -0800 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2019-01-06 12:52:33 -0800 |
| commit | aff782c4293e0c471505743575a1a0683a7ed096 (patch) | |
| tree | 1cd15a0d670764bba76e91731085ec922898ec74 /subx/052kernel-string-equal.subx | |
| parent | 458ee5e354fa55e770696fb19054d4c6bb60ead6 (diff) | |
| download | mu-aff782c4293e0c471505743575a1a0683a7ed096.tar.gz | |
4911
Diffstat (limited to 'subx/052kernel-string-equal.subx')
| -rw-r--r-- | subx/052kernel-string-equal.subx | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/subx/052kernel-string-equal.subx b/subx/052kernel-string-equal.subx index 67e9695e..5ee7d5ef 100644 --- a/subx/052kernel-string-equal.subx +++ b/subx/052kernel-string-equal.subx @@ -29,16 +29,6 @@ # compare a null-terminated ascii string with a more idiomatic length-prefixed byte array # reason for the name: the only place we should have null-terminated ascii strings is from commandline args kernel-string-equal: # s : null-terminated ascii string, benchmark : length-prefixed ascii string -> EAX : boolean - # . prolog - 55/push-EBP - 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP - # . save registers - 51/push-ECX - 52/push-EDX - 53/push-EBX - 56/push-ESI - 57/push-EDI - # pseudocode: # initialize n = b->length # initialize s1 = s @@ -53,6 +43,15 @@ kernel-string-equal: # s : null-terminated ascii string, benchmark : length-pre # return false # return *s1 == 0 # + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # . save registers + 51/push-ECX + 52/push-EDX + 53/push-EBX + 56/push-ESI + 57/push-EDI # initialize s into EDI 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 7/r32/EDI 8/disp8 . # copy *(EBP+8) to EDI # initialize benchmark length n into EDX |