FAIL: t-get_d_2exp

[R. Diez]

Hi all:

I am building a cross-compiling toolchain. In the process, my makefile builds a number of libraries that GCC needs. GMP is one of them.

I ran "make check" once, and self-test t-get_d_2exp is failing:

mpz_get_d_2exp wrong on 2**54-1
result out of range, expect 0.5 <= got < 1.0
    rnd_mode = 0
    data[i]  = 54
    z    =0x3FFFFFFFFFFFFF
    got  =[00 00 00 00 00 00 F0 3F] 1
    got exp  54
FAIL t-get_d_2exp (exit status: 134)

Other tests run fine.

Is this problem already known? Is it worth pursuing? I can provide more information on demand.

These are the versions I am building at the moment:

   BINUTILS_VERSION := 2.32
   GMP_VERSION := 6.1.2
   MPFR_VERSION := 4.0.2
   MPC_VERSION := 1.1.0
   GCC_VERSION := 8.3.0
   NEWLIB_VERSION := 3.1.0
   GDB_VERSION := 8.3

The whole thing runs on an Ubuntu 18.04.2 system. This PC is a few years old and I have not noticed anything wrong with it yet.

I am building the toolchain with -O3 and LTO at the moment.

Best regards,
   rdiez