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| author | Yuriy Glukhov <yuriy.glukhov@gmail.com> | 2016-02-03 15:48:01 +0200 |
|---|---|---|
| committer | Yuriy Glukhov <yuriy.glukhov@gmail.com> | 2016-02-03 15:48:01 +0200 |
| commit | d148fdab5c21aaab6843aafc0f9b613d4eea78e4 (patch) | |
| tree | a24be819685170ed906e7c21c99e677507354a1c /compiler | |
| parent | ac1e7a245093bb28a1a366f1e169ab50e6660c94 (diff) | |
| download | Nim-d148fdab5c21aaab6843aafc0f9b613d4eea78e4.tar.gz | |
Prefer JS typed arrays for arrays.
Diffstat (limited to 'compiler')
| -rw-r--r-- | compiler/jsgen.nim | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/compiler/jsgen.nim b/compiler/jsgen.nim index 9424a9fc5..7ff822dd1 100644 --- a/compiler/jsgen.nim +++ b/compiler/jsgen.nim @@ -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) = |