mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 02:52:53 +02:00
Optimize 96-bit division a little bit.
llvm-svn: 136222
This commit is contained in:
parent
29ef880b52
commit
760b5d7506
@ -46,8 +46,9 @@ void mult96bit(uint64_t freq, uint32_t N, uint64_t W[2]) {
|
||||
uint64_t div96bit(uint64_t W[2], uint32_t D) {
|
||||
uint64_t y = W[0];
|
||||
uint64_t x = W[1];
|
||||
int i;
|
||||
|
||||
for (int i = 1; i <= 64; ++i) {
|
||||
for (i = 1; i <= 64 && x; ++i) {
|
||||
uint32_t t = (int)x >> 31;
|
||||
x = (x << 1) | (y >> 63);
|
||||
y = y << 1;
|
||||
@ -57,7 +58,7 @@ uint64_t div96bit(uint64_t W[2], uint32_t D) {
|
||||
}
|
||||
}
|
||||
|
||||
return y;
|
||||
return y << (64 - i + 1);
|
||||
}
|
||||
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user