diff options
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 ? |