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| author | Robert de Bath <rdebath@poboxes.com> | 1999-06-11 14:11:38 +0200 |
|---|---|---|
| committer | Lubomir Rintel <lkundrak@v3.sk> | 2013-10-23 23:41:25 +0200 |
| commit | 3d4957c86ff239b24b43933924ec72a3fd288518 (patch) | |
| tree | da8225a4d7bb2d9123e10d558cdc3eebae6254c8 /libc/string/string.c | |
| parent | e62b35169cdcd13632ae353b1e5ffde7dec44201 (diff) | |
| download | dev86-3d4957c86ff239b24b43933924ec72a3fd288518.tar.gz | |
Import Dev86src-0.14.8.tar.gzv0.14.8
Diffstat (limited to 'libc/string/string.c')
| -rw-r--r-- | libc/string/string.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/libc/string/string.c b/libc/string/string.c index ffce96c..705ec55 100644 --- a/libc/string/string.c +++ b/libc/string/string.c @@ -382,8 +382,9 @@ size_t l; mov ax,di #endif - ; If di is odd mov 1 byte before doing word move - ; this will speed slightly but + ; If di is odd we could mov 1 byte before doing word move + ; as this would speed the copy slightly but its probably + ; too rare to be worthwhile. ; NB 8086 has no problem with mis-aligned access. shr cx,#1 ; Do this faster by doing a mov word @@ -647,8 +648,16 @@ unsigned int srcseg, srcoff, destseg, destoff, len; mov di,[bp+8] mov cx,[bp+10] #endif + + ; Would it me a good idea to normalise the pointers ? + ; How about allowing for overlapping moves ? + + shr cx,#1 ; Do this faster by doing a mov word rep - movsb + movsw + adc cx,cx ; Retrieve the leftover 1 bit from cflag. + rep + movsb ! cli ! Are we _really_ paranoid ? |