Add simd annotation to generic_scale!

jiahao · jiahao · commit db90ac071ed8 · 2015-10-21T17:36:34.000-04:00
Ref: #13686 (comment) #13681 (comment)
diff --git a/base/linalg/generic.jl b/base/linalg/generic.jl
@@ -8,7 +8,7 @@ scale(s::Number, X::AbstractArray) = s*X
 # For better performance when input and output are the same array
 # See https://github.com/JuliaLang/julia/issues/8415#issuecomment-56608729
 function generic_scale!(X::AbstractArray, s::Number)
-    for I in eachindex(X)
+    @simd for I in eachindex(X)
         @inbounds X[I] *= s
     end
     X

Original file line number	Diff line number	Diff line change
`@@ -8,7 +8,7 @@ scale(s::Number, X::AbstractArray) = s*X`
`8`	`8`	`# For better performance when input and output are the same array`
`9`	`9`	`# See https://github.com/JuliaLang/julia/issues/8415#issuecomment-56608729`
`10`	`10`	`function generic_scale!(X::AbstractArray, s::Number)`
`11`		`- for I in eachindex(X)`
	`11`	`+ @simd for I in eachindex(X)`
`12`	`12`	`@inbounds X[I] *= s`
`13`	`13`	`end`
`14`	`14`	`X`