lib: remove simd support from util.format()

Upstream V8 is removing SIMD support. Be proactive and follow suit. Refs: https://bugs.chromium.org/p/v8/issues/detail?id=4124 PR-URL: #11346 Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Evan Lucas <[email protected]> Reviewed-By: Ali Ijaz Sheikh <[email protected]> Reviewed-By: Сковорода Никита Андреевич <[email protected]> Reviewed-By: Sakthipriyan Vairamani <[email protected]> Reviewed-By: Anna Henningsen <[email protected]>

Author: bnoordhuis

lib/util.js

@@ -18,41 +18,6 @@ const inspectDefaultOptions = Object.seal({
 });
 
 varDebug;
-varsimdFormatters;
-
-// SIMD is only available when --harmony_simd is specified on the command line
-// and the set of available types differs between v5 and v6, that's why we use
-// a map to look up and store the formatters. It also provides a modicum of
-// protection against users monkey-patching the SIMD object.
-if(typeofglobal.SIMD==='object'&&global.SIMD!==null){
-simdFormatters=newMap();
-
-constmake=
-(extractLane,count)=>(ctx,value,recurseTimes,visibleKeys,keys)=>{
-constoutput=newArray(count);
-for(vari=0;i<count;i+=1)
-output[i]=formatPrimitive(ctx,extractLane(value,i));
-returnoutput;
-};
-
-constcountPerType={
-Bool16x8: 8,
-Bool32x4: 4,
-Bool8x16: 16,
-Float32x4: 4,
-Int16x8: 8,
-Int32x4: 4,
-Int8x16: 16,
-Uint16x8: 8,
-Uint32x4: 4,
-Uint8x16: 16
-};
-
-for(constkeyincountPerType){
-consttype=global.SIMD[key];
-simdFormatters.set(type,make(type.extractLane,countPerType[key]));
-}
-}
 
 functiontryStringify(arg){
 try{
@@ -508,7 +473,6 @@ function formatValue(ctx, value, recurseTimes){
 braces=['{','}'];
 formatter=formatPromise;
 }else{
-letmaybeSimdFormatter;
 if(binding.isMapIterator(value)){
 constructor={name: 'MapIterator'};
 braces=['{','}'];
@@ -519,11 +483,6 @@ function formatValue(ctx, value, recurseTimes){
 braces=['{','}'];
 empty=false;
 formatter=formatCollectionIterator;
-}elseif(simdFormatters&&
-typeofconstructor==='function'&&
-(maybeSimdFormatter=simdFormatters.get(constructor))){
-braces=['[',']'];
-formatter=maybeSimdFormatter;
 }else{
 // Unset the constructor to prevent "Object{...}" for ordinary objects.
 if(constructor&&constructor.name==='Object')