fix #8968: abs(big(-0.0))

JuliaLang · Nov 10, 2014 · a42a54b · a42a54b
1 parent 43967f5
commit a42a54b
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Showing 2 changed files with 5 additions and 1 deletion.
diff --git a/base/number.jl b/base/number.jl
@@ -21,7 +21,7 @@ last(x::Number) = x
 divrem(x,y) = (div(x,y),rem(x,y))
 signbit(x::Real) = x < 0
 sign(x::Real) = ifelse(x < 0, oftype(x,-1), ifelse(x > 0, one(x), x))
-abs(x::Real) = ifelse(x < 0, -x, x)
+abs(x::Real) = ifelse(signbit(x), -x, x)
 abs2(x::Real) = x*x
 copysign(x::Real, y::Real) = ifelse(signbit(x)!=signbit(y), -x, x)
 

diff --git a/test/numbers.jl b/test/numbers.jl
@@ -2030,3 +2030,7 @@ end
 @test_throws InexactError convert(Int, big(2)^100)
 @test_throws InexactError convert(Int16, big(2)^100)
 @test_throws InexactError convert(Int, typemax(UInt))
+
+let x = big(-0.0)
+    @test signbit(x) && !signbit(abs(x))
+end