[parisc-linux] libqthreads and hppa-linux

[Alan Modra]

On Wed, Aug 01, 2001 at 10:49:45PM -0600, LaMont Jones wrote:
> > > So fix the assembler!  gas/config/tc-hppa.c:pre_defined_registers
> > Dunno which regs they are, and don't have a current runtime arch doc at
> > home.
> 
> This code seems to think that four args are passed in regs, but the code
> that cc generates appears to only pass two doubles in regs.  Likewise,
> are the FR's numbered the same?  (The names were rather funky on hp-ux,
> due to legacy issues...)

Hmm, I wonder if you've found a gcc bug?

#if 1
#define FP float
#else
#define FP double
#endif
extern FP f1 (FP a);
extern FP f2 (FP a, FP b);
extern FP f3 (FP a, FP b, FP c);
extern FP f4 (FP a, FP b, FP c, FP d);

int main (void)
{
  return f1 (1.) + f2 (1., 2.) + f3 (1., 2., 3.) + f4 (1., 2., 3., 4.);
}

With FP as float, I get fr4L, fr5L, fr6L, fr7L used in that order for
floating point args.  With FP as double, I get fr5, fr7, stack args.
Weird, but then the pa ABI _is_ weird.  I think you do need to check
that ABI document.

Alan