Hi, On Thu, 2009-05-28 at 13:31 +0200, Florian Fainelli wrote: > Le Saturday 27 December 2008 16:19:40 Richard Sandiford, vous avez écrit : > > "Maciej W. Rozycki" <macro@xxxxxxxxxxxxxx> writes: > > > On Wed, 17 Dec 2008, David Daney wrote: > > >> This is an incomplete proof of concept that I applied to be able to > > >> build a 64 bit kernel with GCC-4.4. It doesn't handle the 32 bit case > > >> or the R4000_WAR case. > > > > > > The R4000_WAR case can use the same C code -- GCC will adjust code > > > generated as necessary according to the -mfix-r4000 flag. For the 32-bit > > > case I think the conclusion was the only way to get it working is to use > > > MFHI explicitly in the asm. > > > > No, the same sort of cast, multiply and shift should work for 32-bit > > code too. I.e.: > > > > usecs = ((uint64_t)usecs * lpj) >> 32; > > > > It should work for both -mfix-r4000 and -mno-fix-r4000. > > Any updates on this ? I have updated it to this PATCH, could you help to review it? [loongson-PATCH-v2 20/23] add gcc 4.4 support for MIPS and loongson thx! Wu Zhangjin
