Thanks Paul, Do you think you can put together a patch? -- Jeff J. On Tue, Feb 7, 2023 at 9:27 AM Paul Zimmermann wrote: > Hi, > > while testing Newlib 4.3.0, I noticed the following huge error: > > zimmerma@salade:~/svn/tbd/20/src/binary64$ VERBOSE=-v ./doitb.newlib pow > 1000 > Checking pow with newlib-4.3.0.20230120 > Using seed 1619945 > pow 0 -1 -0x1.647ff80007ff8p-576,-0x1.3d018267f12fp+48 [inf] inf inf > libm gives inf > mpfr gives -inf > > The exponent y in x^y is a large odd integer, thus since x is negative we > should get a negative number as result. > > This issue was apparently already present in 3.3.0, but we only discovered > it now. > > Best regards, > Paul > > >