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Merge pull request #3817 from yglukhov/js-typed-arrays

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Prefer JS typed arrays for arrays.
This commit is contained in:
Andreas Rumpf
2016-02-06 15:28:46 +01:00
parent 73291aa1bc d148fdab5c
commit 3941b8968c
1 changed files with 27 additions and 4 deletions
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31
compiler/jsgen.nim
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@@ -1138,6 +1138,18 @@ proc createObjInitList(p: PProc, typ: PType, excludedFieldIDs: IntSet, output: v
createRecordVarAux(p, t.n, excludedFieldIDs, output)
t = t.sons[0]
proc arrayTypeForElemType(typ: PType): string =
case typ.kind
of tyInt, tyInt32: "Int32Array"
of tyInt16: "Int16Array"
of tyInt8: "Int8Array"
of tyUint, tyUint32: "Uint32Array"
of tyUint16: "Uint16Array"
of tyUint8: "Uint8Array"
of tyFloat32: "Float32Array"
of tyFloat64, tyFloat: "Float64Array"
else: nil
proc createVar(p: PProc, typ: PType, indirect: bool): Rope =
var t = skipTypes(typ, abstractInst)
case t.kind
@@ -1152,9 +1164,12 @@ proc createVar(p: PProc, typ: PType, indirect: bool): Rope =
of tyBool:
result = putToSeq("false", indirect)
of tyArray, tyArrayConstr:
var length = int(lengthOrd(t))
var e = elemType(t)
if length > 32:
let length = int(lengthOrd(t))
let e = elemType(t)
let jsTyp = arrayTypeForElemType(e)
if not jsTyp.isNil:
result = "new $1($2)" % [rope(jsTyp), rope(length)]
elif length > 32:
useMagic(p, "arrayConstr")
# XXX: arrayConstr depends on nimCopy. This line shouldn't be necessary.
useMagic(p, "nimCopy")
@@ -1766,7 +1781,15 @@ proc genHeader(): Rope =
"/* (c) 2015 Andreas Rumpf */$n$n" &
"var framePtr = null;$n" &
"var excHandler = 0;$n" &
"var lastJSError = null;$n") %
"var lastJSError = null;$n" &
"if (typeof Int8Array === 'undefined') Int8Array = Array;$n" &
"if (typeof Int16Array === 'undefined') Int16Array = Array;$n" &
"if (typeof Int32Array === 'undefined') Int32Array = Array;$n" &
"if (typeof Uint8Array === 'undefined') Uint8Array = Array;$n" &
"if (typeof Uint16Array === 'undefined') Uint16Array = Array;$n" &
"if (typeof Uint32Array === 'undefined') Uint32Array = Array;$n" &
"if (typeof Float32Array === 'undefined') Float32Array = Array;$n" &
"if (typeof Float64Array === 'undefined') Float64Array = Array;$n") %
[rope(VersionAsString)]
proc genModule(p: PProc, n: PNode) =