Bug#327351: gcc-4.0: Gcc miscompiles libc on hppa - breaks rounding

[Wesley W. Terpstra]

On Sep 9, 2005, at 3:46 PM, Falk Hueffner wrote: Add "m"(*sw) as constraint. Probably something like __asm__ ("fldd %0,%%fr0" : : "m"(*sw)) The first asm would also be more efficiently expressed as: __asm__ ("fstd %%fr0,%0" : "=m"(*sw)) unless these instruction have some unusual constraints such as requiring zero offsett (I'm not familiar with this architecture). I don't know it either, but what you propose doesn't compile. It complains about invalid argument when the 0() is removed. So, this appears to work (compile and give proper results): int fesetround (int round) {   unsigned int sw[2];   if (round & ~FE_DOWNWARD)     /* ROUND is not a valid rounding mode.  */     return 1;   /* Get the current status word. */   __asm__ ("fstd %%fr0,0(%1)" : "=m" (*sw) : "r" (sw));   sw[0] &= ~FE_DOWNWARD;   sw[0] |= round;   __asm__ ("fldd 0(%1), %%fr0" :: "m" (*sw), "r" (sw));   return 0; } Is this doing the right thing now?