Skip to content

[APFloat] Replace partsCount array with single variable (NFC) #91910

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
May 14, 2024
Merged

[APFloat] Replace partsCount array with single variable (NFC) #91910

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
25 changes: 10 additions & 15 deletions llvm/lib/Support/APFloat.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -732,7 +732,7 @@ powerOf5(APFloatBase::integerPart *dst, unsigned int power) {
APFloatBase::integerPart pow5s[maxPowerOfFiveParts * 2 + 5];
pow5s[0] = 78125 * 5;

unsigned int partsCount[16] = { 1 };
unsigned int partsCount = 1;
APFloatBase::integerPart scratch[maxPowerOfFiveParts], *p1, *p2, *pow5;
unsigned int result;
assert(power <= maxExponent);
Expand All @@ -747,25 +747,20 @@ powerOf5(APFloatBase::integerPart *dst, unsigned int power) {
pow5 = pow5s;

for (unsigned int n = 0; power; power >>= 1, n++) {
unsigned int pc;

pc = partsCount[n];

/* Calculate pow(5,pow(2,n+3)) if we haven't yet. */
if (pc == 0) {
pc = partsCount[n - 1];
APInt::tcFullMultiply(pow5, pow5 - pc, pow5 - pc, pc, pc);
pc *= 2;
if (pow5[pc - 1] == 0)
pc--;
partsCount[n] = pc;
if (n != 0) {
APInt::tcFullMultiply(pow5, pow5 - partsCount, pow5 - partsCount,
partsCount, partsCount);
partsCount *= 2;
if (pow5[partsCount - 1] == 0)
partsCount--;
}

if (power & 1) {
APFloatBase::integerPart *tmp;

APInt::tcFullMultiply(p2, p1, pow5, result, pc);
result += pc;
APInt::tcFullMultiply(p2, p1, pow5, result, partsCount);
result += partsCount;
if (p2[result - 1] == 0)
result--;

Expand All @@ -776,7 +771,7 @@ powerOf5(APFloatBase::integerPart *dst, unsigned int power) {
p2 = tmp;
}

pow5 += pc;
pow5 += partsCount;
}

if (p1 != dst)
Expand Down