On 2014/02/18 07:21:24, Sven Panne wrote:
LGTM as a first step, too, but I think this should have Crankshaft
support.
https://codereview.chromium.org/169783002/diff/130001/src/harmony-math.js
File src/harmony-math.js (right):
https://codereview.chromium.org/169783002/diff/130001/src/harmony-math.js#newcode157
src/harmony-math.js:157: function MathClz32(x) {
What TC39 seems to intend is basically exposing some form of intrinsics
for
processor intstructions. AFAICT "count leading zeroes" has HW support for
all
our platforms and boils down to a single CPU instructions, and I think
this is
the expectation of people using such intrinsics. Therefore we should add
Crankshaft support, which shouldn't be too hard.
talked to dmitry about this offline. tahts essentially the plan.
https://codereview.chromium.org/169783002/
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