diff options
Diffstat (limited to 'manual/arith.texi')
| -rw-r--r-- | manual/arith.texi | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/manual/arith.texi b/manual/arith.texi index 89c2c064f1..75eaf67fe7 100644 --- a/manual/arith.texi +++ b/manual/arith.texi @@ -1895,9 +1895,10 @@ propagated from NaN inputs to the result of a floating-point operation. These functions, defined by TS 18661-1:2014 and TS 18661-3:2015, 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. +floating-point number); if @var{x} is not a NaN, they return +@minus{}1. They raise no floating-point exceptions even for signaling +NaNs. (The return value of @minus{}1 for an argument that is not a +NaN is specified in C2x; the value was unspecified in TS 18661.) @end deftypefun @deftypefun int setpayload (double *@var{x}, double @var{payload}) |