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o There are 6 trap disable bits in ar.fpsr, not five. Even though we

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didn't provide a constant for one of them (non-IEEE denormal trap),
  in an attempt to not support it probably, it's not we are left with
  the lower 5 bits.
o Properly mask the passed or returned fp_except_t. Not doing so
  causes instant core dumps by trying to write an invalid value to
  ar.fpsr. Now that we're masking, stop using exclusive-or to invert
  bits.

This fixes the illegal instruction fault encountered when building
mozilla.
This commit is contained in:
marcel 2003-08-09 17:07:24 +00:00
parent 52d72144a6
commit 32aa925e11
2 changed files with 4 additions and 4 deletions
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2
lib/libc/ia64/gen/fpgetmask.c
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@ -36,5 +36,5 @@ fpgetmask(void)
u_int64_t fpsr;
__asm __volatile("mov %0=ar.fpsr" : "=r" (fpsr));
return (fpsr & 0x1f) ^ 0x1f;
return (~fpsr & 0x3f);
}

6
lib/libc/ia64/gen/fpsetmask.c
View File

@ -37,8 +37,8 @@ fpsetmask(fp_except_t mask)
u_int64_t oldmask;
__asm __volatile("mov %0=ar.fpsr" : "=r" (fpsr));
oldmask = (fpsr & 0x1f) ^ 0x1f;
fpsr = (fpsr & ~0x1f) | (mask ^ 0x1f);
oldmask = ~fpsr & 0x3f;
fpsr = (fpsr & ~0x3f) | (~mask & 0x3f);
__asm __volatile("mov ar.fpsr=%0" :: "r" (fpsr));
return oldmask;
return (oldmask);
}