On 09/23/13 09:53 PM, Dominick Samperi wrote:
Apple has kept their 64-bit plans secret until recently, but now they
want as many apps as possible to migrate to 64-bit. That may mean a big
push for 64-bit support in LLVM, which can be built upon by GHC...
It's not so easy.
1) ARMv8 is already supported in LLVM by work done by ARM folks for some
time.
2) Apple's own private ARMv8 support will be merged with current LLVM
ARMv8 support in the not so near future. See
http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-September/065480.html
3) although GHC on ARM is using LLVM as its backend, you still need to
write some general support code for the architecture itself. See for
example Platform.hs, StgCRun.c, MachRegs.h and some optimization bits
also in LLVM backend -- at minimum.
Karel
On Sep 23, 2013 1:06 PM, "Karel Gardas" <karel.gar...@centrum.cz
<mailto:karel.gar...@centrum.cz>> wrote:
On 09/23/13 06:52 PM, Dominick Samperi wrote:
Also, the iPhone 5S is the first with 64-bit support, and for best
performance all apps should be 64-bit (because then no 32-bit
libs need
to be loaded, and there are more general purpose and floating point
registers in 64-bit mode). Are there any roadblocks preventing the
creation of 64-bit GHC/iOS7 apps?
Yes, it is "just" one: GHC's ARMv8 support is completely missing.
Cheers,
Karel
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