On 2014/02/19 13:24:08, Sven Panne wrote:
https://codereview.chromium.org/172133003/diff/110001/src/a64/lithium-codegen-a64.cc#newcode3858
src/a64/lithium-codegen-a64.cc:3858: __ Clz(result, input);
Hmmm, can we mix W and X registers in a single instruction? The intention
seems
to be "count in 32bits and silently expand the result to 64bit", no clue
if
this
is possible.
In most cases, you can't mix W and X registers in the same instruction.
When you
can, you have to state how the W is interpreted as an X, ie. sxtw, uxtw.
https://codereview.chromium.org/172133003/
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