479525 - TM: nanojit doesn't work on Windows CE

Status: RESOLVED FIXED

(Core :: JavaScript Engine, defect)

Description

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Attachment: fix NJ on WinCE

Turns out the Windows CE calling conventions are in fact different from ARM EABI; I misunderstood the MSDN docs.  I've now got a real CE compiler and the like, and was able to test.

With the following patch, trace-tests pass, at least with NJ_ARM_VFP, and browser seems usable with jit on.

One thing that I had to do was disable the regexp jit optimization for comparing 2 chars at a time -- it's using a 32-bit load on a pointer to 2-byte-aligned data, which is bad.  I just converted it to do all single-char comparisons, but this can be fixed.  dmandelin, does that change look right?

Comment 1

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

http://hg.mozilla.org/mozilla-central/rev/16cf92dc8c6c

Comment 2

[Robert Sayre]

http://hg.mozilla.org/releases/mozilla-1.9.1/rev/d51b93035da7