The powerpc64 versions of ceil, floor, round, trunc, rint, nearbyint
and their float versions return sNaN for sNaN input when they should
return qNaN. This patch fixes them to add a NaN argument to itself to
quiet sNaNs before returning.
Tested for powerpc64.
[BZ #20160]
* sysdeps/powerpc/powerpc64/fpu/s_ceil.S (__ceil): Add NaN
argument to itself before returning the result.
* sysdeps/powerpc/powerpc64/fpu/s_ceilf.S (__ceilf): Likewise.
* sysdeps/powerpc/powerpc64/fpu/s_floor.S (__floor): Likewise.
* sysdeps/powerpc/powerpc64/fpu/s_floorf.S (__floorf): Likewise.
* sysdeps/powerpc/powerpc64/fpu/s_nearbyint.S (__nearbyint):
Likewise.
* sysdeps/powerpc/powerpc64/fpu/s_nearbyintf.S (__nearbyintf):
Likewise.
* sysdeps/powerpc/powerpc64/fpu/s_rint.S (__rint): Likewise.
* sysdeps/powerpc/powerpc64/fpu/s_rintf.S (__rintf): Likewise.
* sysdeps/powerpc/powerpc64/fpu/s_round.S (__round): Likewise.
* sysdeps/powerpc/powerpc64/fpu/s_roundf.S (__roundf): Likewise.
* sysdeps/powerpc/powerpc64/fpu/s_trunc.S (__trunc): Likewise.
* sysdeps/powerpc/powerpc64/fpu/s_truncf.S (__truncf): Likewise.
Continuing fixes for ceil, floor and trunc functions not to raise the
"inexact" exception, this patch fixes the versions used on older
powerpc64 processors. As was done with the round implementations some
time ago, the save of floating-point state is moved after the first
floating-point operation on the input to ensure that any "invalid"
exception from signaling NaN input is included in the saved state, and
then the whole state gets restored rather than just the rounding mode.
This has no effect on configurations using the power5+ code, since
such processors can do these operations with a single instruction (and
those instructions do not set "inexact", so are correct for TS 18661-1
semantics).
Tested for powerpc64.
[BZ #15479]
* sysdeps/powerpc/powerpc64/fpu/s_ceil.S (__ceil): Move save of
floating-point state after first floating-point operation on
input. Restore full floating-point state instead of just rounding
mode.
* sysdeps/powerpc/powerpc64/fpu/s_ceilf.S (__ceilf): Likewise.
* sysdeps/powerpc/powerpc64/fpu/s_floor.S (__floor): Likewise.
* sysdeps/powerpc/powerpc64/fpu/s_floorf.S (__floorf): Likewise.
* sysdeps/powerpc/powerpc64/fpu/s_trunc.S (__trunc): Likewise.
* sysdeps/powerpc/powerpc64/fpu/s_truncf.S (__truncf): Likewise.
