On Tue, 30 Mar 2010, Paulo J. Matos wrote: > GCC is generating a call to floatunsihf when it needs to convert an > unsigned integer to a float. And this call is being generated because > I am compiling to a 16bit target, where floats are 32, meaning floats > are HFmode.
No, HFmode only exists if you specifically define it to exist for a target. Unless you really know what you are doing, you should not define it until you have ordinary float (SFmode) working. If HFmode calls are generated without having defined it as a target-specific mode, something is wrong you need to resolve. The basic unit for machine modes is QImode, meaning one byte - BITS_PER_UNIT bits (8 bits unless you know exactly what you are doing and are prepared to fix many broken and bit-rotten cases in machine-independent code). HImode and HFmode are modes of 2*BITS_PER_UNIT bits. SImode and SFmode are modes of 4*BITS_PER_UNIT bits. So presuming BITS_PER_UNIT is 8, a 32-bit float should be SFmode; a 16-bit integer value should be HImode (for any target with 8-bit bytes, whatever the word size). -- Joseph S. Myers jos...@codesourcery.com
