0ct0pu5/ladybird
1
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2024-12-14 02:10:36 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 7

AK: Fix busted __udivmoddi4() implementation.

Browse source
This commit is contained in:
Andreas Kling 2019-03-21 17:33:06 +01:00
parent 1484a9eabd
commit c2a38c86cf
Notes: sideshowbarker 2024-07-19 14:58:36 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/c2a38c86cfb
1 changed files with 25 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

28
AK/StdLibExtras.cpp
View file

@ -99,7 +99,7 @@ static int32_t signed_modulo64(int64_t n, int64_t d)
int64_t __divdi3(int64_t n, int64_t d)
{
return signed_divide64 (n, d);
return signed_divide64(n, d);
}
int64_t __moddi3(int64_t n, int64_t d)
@ -119,8 +119,30 @@ uint64_t __umoddi3(uint64_t n, uint64_t d)
uint64_t __udivmoddi4(uint64_t n, uint64_t d, uint64_t* r)
{
*r = unsigned_modulo64(n, d);
return unsigned_divide64(n, d);
uint64_t q = 0;
uint64_t qbit = 1;
if (!d)
return 1 / ((unsigned)d);
while ((int64_t)d >= 0) {
d <<= 1;
qbit <<= 1;
}
while (qbit) {
if (d <= n) {
n -= d;
q += qbit;
}
d >>= 1;
qbit >>= 1;
}
if (r)
*r = n;
return q;
}
}