diff options
Diffstat (limited to 'manual/arith.texi')
| -rw-r--r-- | manual/arith.texi | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/manual/arith.texi b/manual/arith.texi index 282ca45e08..e53988a083 100644 --- a/manual/arith.texi +++ b/manual/arith.texi @@ -1854,6 +1854,26 @@ The argument @var{tagp} is used in an unspecified manner. On @w{IEEE selects one. On other systems it may do nothing. @end deftypefun +@comment math.h +@comment ISO +@deftypefun double getpayload (const double *@var{x}) +@comment math.h +@comment ISO +@deftypefunx float getpayloadf (const float *@var{x}) +@comment math.h +@comment ISO +@deftypefunx {long double} getpayloadl (const long double *@var{x}) +@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} +IEEE 754 defines the @dfn{payload} of a NaN to be an integer value +encoded in the representation of the NaN. Payloads are typically +propagated from NaN inputs to the result of a floating-point +operation. These functions, defined by TS 18661-1:2014, return the +payload of the NaN pointed to by @var{x} (returned as a positive +integer, or positive zero, represented as a floating-point number); if +@var{x} is not a NaN, they return an unspecified value. They raise no +floating-point exceptions even for signaling NaNs. +@end deftypefun + @node FP Comparison Functions @subsection Floating-Point Comparison Functions @cindex unordered comparison |