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Teach julia that NaNMath functions don't have effects #67

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merged 4 commits into from
Jan 22, 2025
Merged

Teach julia that NaNMath functions don't have effects #67

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f20ef4b
Teach julia that NaNMath functions don't have effects
oscardssmith Aug 2, 2023
05dd872
Update Project
oscardssmith Aug 2, 2023
e9ef8b9
no need for compat
ChrisRackauckas Jan 22, 2025
e51a40a
namespace
ChrisRackauckas Jan 22, 2025
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9 changes: 5 additions & 4 deletions src/NaNMath.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -6,8 +6,8 @@ const libm = OpenLibm_jll.libopenlibm
for f in (:sin, :cos, :tan, :asin, :acos, :acosh, :atanh, :log, :log2, :log10,
:lgamma, :log1p)
@eval begin
($f)(x::Float64) = ccall(($(string(f)),libm), Float64, (Float64,), x)
($f)(x::Float32) = ccall(($(string(f,"f")),libm), Float32, (Float32,), x)
@assume_effects :total ($f)(x::Float64) = ccall(($(string(f)),libm), Float64, (Float64,), x)
@assume_effects :total ($f)(x::Float32) = ccall(($(string(f,"f")),libm), Float32, (Float32,), x)
($f)(x::Real) = ($f)(float(x))
if $f !== :lgamma
($f)(x) = (Base.$f)(x)
Expand All @@ -25,12 +25,13 @@ end

# Would be more efficient to remove the domain check in Base.sqrt(),
# but this doesn't seem easy to do.
@assume_effects :nothrow sqrt(x::T) where {T<:Union{Float16, Float32, Float64}} = x < 0.0 ? T(NaN) : Base.sqrt(x)
sqrt(x::T) where {T<:AbstractFloat} = x < 0.0 ? T(NaN) : Base.sqrt(x)
sqrt(x::Real) = sqrt(float(x))

# Don't override built-in ^ operator
pow(x::Float64, y::Float64) = ccall((:pow,libm), Float64, (Float64,Float64), x, y)
pow(x::Float32, y::Float32) = ccall((:powf,libm), Float32, (Float32,Float32), x, y)
@assume_effects :total pow(x::Float64, y::Float64) = ccall((:pow,libm), Float64, (Float64,Float64), x, y)
@assume_effects :total pow(x::Float32, y::Float32) = ccall((:powf,libm), Float32, (Float32,Float32), x, y)
# We `promote` first before converting to floating pointing numbers to ensure that
# e.g. `pow(::Float32, ::Int)` ends up calling `pow(::Float32, ::Float32)`
pow(x::Real, y::Real) = pow(promote(x, y)...)
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