On 2015/03/10 07:43:14, Benedikt Meurer wrote:
One thing I'd like to know: Do you plan to change Emscripten to generate
this
"index masking" based code? Or is it just for developers who write asm.js
code
by hand?
Emscripten has had an experimental 'POINTER_MASKING' feature for some time,
and
an update is inbound, see: https://github.com/kripken/emscripten/pull/3240
It emits buffer accesses as a[(i&m)+c >> n] and V8 optimizes this well on
the
ia32 and with a patch well on x64 see issue 860283004. The masks are defined
with a 'const' so the patch in issue 967093002 is also need for good
performance
(Odin does not optimize a closure 'var' well).
https://codereview.chromium.org/986073003/
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