PTX backend do not support sitofp instruction?

Project Infrastructure LLVM Dev List Archives
#1

Hi all,

Does PTX backend support llvm sitofp instruction?

I failed to compile my llvm source when use llc -march=ptx32.
The reason is that the source has a sitofp instruction.
After i changed the instruction into uitofp manually, it passed.

Thanks in advance,

best,
Yabin

#2

Does PTX backend support llvm sitofp instruction?

  Seems it doesn't support sitofp, search "Conversion
to f32" in PTXInstrInfo.td.

Regards,
chenwj

#3

IIRC, LegalizeDAG has some code to implement sitofp in terms of
uitofp (or maybe uitofp in terms of sitofp, I don't recall).

Ciao, Duncan.

#4

Hi all,

Does PTX backend support llvm sitofp instruction?

Type conversion has not received much love yet. If you send me a test case, I’ll try to create a fix.