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Date: Fri, 05 Feb 2021 09:01:09 +0100
From: Paul Zimmermann <>
Subject: issue with sinhf


a similar issue happens with sinhf:

$ cat test_sinh_musl.c
#include <stdio.h>
#include <stdlib.h>
#include <math.h>

main ()
  float x = 0x1.62e4p+6;
  float y = sinhf (x);
  printf ("x=%a y=%a\n", x, y);

With GNU libc:
$ gcc -fno-builtin test_sinh_musl.c -lm
$ ./a.out
x=0x1.62e4p+6 y=0x1.ffe808p+126

With musl-1.2.2:
$ gcc -fno-builtin test_sinh_musl.c $FILES
$ ./a.out
x=0x1.62e4p+6 y=-nan

Here we get NaN whereas the result is perfectly valid.

Best regards,

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