On Wednesday, 9 July 2014 at 17:13:21 UTC, H. S. Teoh via
Digitalmars-d-learn wrote:
The branched version would look something like this:
mov eax, [<address of u>]
mov ebx, [<address of s>]
cmp ebx, $#0
jge label1 ; first branch
mov eax, $#FFFFFFFF
jmp label2 ; 2nd branch
label1:
sub eax, ebx
label2:
(ret)
Why?
I would say:
mov eax, [<adress of s>] ; mov directly compares to
zero
jl lable ; less -> jump to return
sub eax, [<adress of u>]
neg eax ; because we subtracted in
the wrong order
lable: ret
