diff options
Diffstat (limited to 'sysdeps/s390/fpu/fsetexcptflg.c')
| -rw-r--r-- | sysdeps/s390/fpu/fsetexcptflg.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/sysdeps/s390/fpu/fsetexcptflg.c b/sysdeps/s390/fpu/fsetexcptflg.c index cbe9f34155..4ccc2494e9 100644 --- a/sysdeps/s390/fpu/fsetexcptflg.c +++ b/sysdeps/s390/fpu/fsetexcptflg.c @@ -24,16 +24,25 @@ int fesetexceptflag (const fexcept_t *flagp, int excepts) { - fexcept_t temp,newexcepts; + fexcept_t temp, newexcepts; /* Get the current environment. We have to do this since we cannot separately set the status word. */ _FPU_GETCW (temp); /* Install the new exception bits in the Accrued Exception Byte. */ excepts = excepts & FE_ALL_EXCEPT; - newexcepts = (excepts << FPC_DXC_SHIFT) | (excepts << FPC_FLAGS_SHIFT); + newexcepts = excepts << FPC_FLAGS_SHIFT; temp &= ~newexcepts; - temp |= *flagp & newexcepts; + if ((temp & FPC_NOT_FPU_EXCEPTION) == 0) + /* Bits 6, 7 of dxc-byte are zero, + thus bits 0-5 of dxc-byte correspond to the flag-bits. + Clear given exceptions in dxc-field. */ + temp &= ~(excepts << FPC_DXC_SHIFT); + + /* Integrate dxc-byte of flagp into flags. The dxc-byte of flagp contains + either an ieee-exception or 0 (see fegetexceptflag). */ + temp |= (*flagp | ((*flagp >> FPC_DXC_SHIFT) << FPC_FLAGS_SHIFT)) + & newexcepts; /* Store the new status word (along with the rest of the environment. Possibly new exceptions are set but they won't get executed unless |