Skip to content
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

feat(osmomath): Exp2 function #3708

Merged
merged 20 commits into from
Dec 16, 2022
Merged

feat(osmomath): Exp2 function #3708

Changes from 1 commit
Commits
Show all changes
20 commits
Select commit Hold shift + click to select a range
f442bce
feat(osmomath): exp2 function
p0mvn Dec 14, 2022
025feb0
export exp2
p0mvn Dec 14, 2022
a548068
changelog
p0mvn Dec 14, 2022
658c472
Merge branch 'main' into roman/improved-pow6
p0mvn Dec 14, 2022
ea6c719
refactor ErrTolerance to use Dec instead of Int for additive tolerance
p0mvn Dec 14, 2022
5aba207
Update osmomath/exp2.go
p0mvn Dec 14, 2022
b72f114
Update osmomath/exp2.go
p0mvn Dec 14, 2022
7af4d5c
Update osmomath/exp2.go
p0mvn Dec 14, 2022
8e081a6
Update osmomath/exp2_test.go
p0mvn Dec 14, 2022
3a7a39c
Update osmomath/exp2_test.go
p0mvn Dec 14, 2022
79beaae
Merge branch 'main' into roman/improved-pow6
p0mvn Dec 14, 2022
f73b3f2
do bit shift instead of multiplication
p0mvn Dec 16, 2022
0ac7811
godoc about error bounds
p0mvn Dec 16, 2022
b878401
comment about bit shift equivalency
p0mvn Dec 16, 2022
8a7798b
Merge branch 'main' into roman/improved-pow6
p0mvn Dec 16, 2022
9451599
merge conflict
p0mvn Dec 16, 2022
180ba8c
improve godoc
p0mvn Dec 16, 2022
0171668
typo
p0mvn Dec 16, 2022
cafedbe
remove TODOs - confirmed obsolete
p0mvn Dec 16, 2022
82bb60f
Runge's phenomenon comment
p0mvn Dec 16, 2022
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
10 changes: 4 additions & 6 deletions osmomath/exp2.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -48,16 +48,14 @@ func Exp2(exponent BigDec) BigDec {
panic(fmt.Sprintf("negative exponent %s is not supported", exponent))
}

integerExponentDec := exponent.TruncateDec()
integerExponent := integerExponentDec.TruncateInt()
integerResult := twoBigDec.PowerInteger(integerExponent.Uint64())
integerExponent := exponent.TruncateDec()

fractionalExponent := exponent.Sub(integerExponentDec)
fractionalExponent := exponent.Sub(integerExponent)
fractionalResult := exp2ChebyshevRationalApprox(fractionalExponent)

result := integerResult.Mul(fractionalResult)
fractionalResult.i = fractionalResult.i.Lsh(fractionalResult.i, uint(integerExponent.TruncateInt().Uint64()))

return result
return fractionalResult
p0mvn marked this conversation as resolved.
Show resolved Hide resolved
}

// exp2ChebyshevRationalApprox takes 2 to the power of a given decimal exponent.
Expand Down