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jterrace / js.js

js.js: A JavaScript JavaScript interpreter
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ReferenceError: Can't find variable: Float64Array #1

Closed niutech closed 12 years ago

niutech commented 12 years ago

I am using Safari 5 on Mac OS X, which doesn't support Float64Array, so please map it to Float32Array:

if (typeof Float64Array === 'undefined') window.Float64Array = Float32Array;

jterrace commented 12 years ago

This might actually be fixed in the latest emscripten - I'll check tomorrow. If it is, I just need to regenerate the builds with the latest emscripten version.

jterrace commented 12 years ago

Actually, Float64Array is required. Are you on 5.0 or 5.1? I thought 5.1 added support for Float64Array.

niutech commented 12 years ago

I am on Safari 5.0.6 (latest on Mac 10.5.8) but AFAIK Float64Arrays are not supported on IE<=9 as well.

Google seems to provide a fallback for them in its Closure Library: http://code.google.com/p/closure-library/source/browse/trunk/closure/goog/vec/float64array.js. Is it possible to implement a fallback here?

kripken commented 12 years ago

That float64array fallback cannot use an existing buffer, which is what is needed here (to get C-like memory layout).

There is no good way I am aware of to emulate float 64 arrays. To make it truly precise including aliasing an existing buffer takes a lot of (very slow) calculations.

jterrace commented 12 years ago

I'm closing as invalid then. There's really nothing we can do to support Safari < 5.1 or IE < 10.