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Use primitive type #91

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merged 6 commits into from
Mar 25, 2022
+33 −8
Merged

Use primitive type #91

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1aac6c6
Use primitive type
jmkuhn Mar 15, 2019
008996a
Use struct for Dec128
jmkuhn May 11, 2019
33669e5
use old struct approach on arm64 to prevent regression there
stevengj Mar 25, 2022
21a87f1
use Base.BinaryPlatforms
stevengj Mar 25, 2022
d4b2026
keep reinterpret and bswap consistent
stevengj Mar 25, 2022
38927bb
check for ARM on Julia 1.3 too
stevengj Mar 25, 2022
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36 changes: 28 additions & 8 deletions src/DecFP.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -109,14 +109,31 @@ Base.Rounding.rounding(::Type{T}) where {T<:DecimalFloatingPoint} =
Base.Rounding.setrounding(::Type{T}, r::RoundingMode) where {T<:DecimalFloatingPoint} =
Base.Rounding.setrounding_raw(T, convert(DecFPRoundingMode, r))

@static if Sys.ARCH == :arm64
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struct Dec32 <: DecimalFloatingPoint
x::UInt32
Dec32(x::Number) = convert(Dec32, x)
Base.reinterpret(::Type{Dec32}, x::UInt32) = new(x)
end
struct Dec64 <: DecimalFloatingPoint
x::UInt64
Dec64(x::Number) = convert(Dec64, x)
Base.reinterpret(::Type{Dec64}, x::UInt64) = new(x)
end
else
primitive type Dec32 <: DecimalFloatingPoint 32 end
primitive type Dec64 <: DecimalFloatingPoint 64 end
Dec32(x::Number) = convert(Dec32, x)
Dec64(x::Number) = convert(Dec64, x)
end
struct Dec128 <: DecimalFloatingPoint
x::UInt128
Dec128(x::Number) = convert(Dec128, x)
Base.reinterpret(::Type{Dec128}, x::UInt128) = new(x)
end
for w in (32,64,128)
BID = Symbol(string("Dec",w))
Ti = Symbol(string("UInt",w))
@eval struct $BID <: DecimalFloatingPoint
x::$Ti
$BID(x::Number) = convert($BID, x)
Base.reinterpret(::Type{$BID}, x::$Ti) = new(x)
end

@eval function $BID(x::Real, mode::RoundingMode)
setrounding($BID, mode) do
Expand Down Expand Up @@ -494,7 +511,7 @@ for w in (32,64,128)
Base.one(::Union{Type{$BID},$BID}) = $(_parse(T, "1"))
Base.zero(::Union{Type{$BID},$BID}) = $(_parse(T, "0"))

Base.signbit(x::$BID) = $(zero(Ti)) != $(Ti(1) << (Ti(w - 1))) & x.x
Base.signbit(x::$BID) = $(zero(Ti)) != $(Ti(1) << (Ti(w - 1))) & reinterpret($Ti, x)
Base.sign(x::$BID) = ifelse(isnan(x) || iszero(x), x, ifelse(signbit(x), $(_parse(T, "-1")), $(_parse(T, "1"))))

Base.nextfloat(x::$BID) = nox(_nextfloat(x))
Expand Down Expand Up @@ -616,12 +633,15 @@ for w in (32,64,128)
end
end

@eval Base.bswap(x::$BID) = reinterpret($BID, bswap(x.x))
@eval Base.convert(::Type{Float16}, x::$BID) = convert(Float16, convert(Float32, x))
@eval Base.Float16(x::$BID) = convert(Float16, x)
@eval Base.reinterpret(::Type{$Ti}, x::$BID) = x.x
end # widths w

Base.reinterpret(::Type{UInt128}, x::Dec128) = x.x
Base.bswap(x::Dec32) = reinterpret(Dec32, bswap(reinterpret(UInt32, x)))
Base.bswap(x::Dec64) = reinterpret(Dec64, bswap(reinterpret(UInt64, x)))
Base.bswap(x::Dec128) = reinterpret(Dec128, bswap(x.x))

Base.round(x::DecimalFloatingPoint, ::RoundingMode{:FromZero}) = signbit(x) ? floor(x) : ceil(x)

for (f) in (:trunc, :floor, :ceil)
Expand Down