mini-gmp errors on SYSTYPE: powerpc750-unknown-linux-gnu
bodrato at mail.dm.unipi.it
Tue Dec 17 19:03:30 UTC 2019
From our testing system is emerging an error on some powerpc750.
The test t-cmp_d for mini-gmp is failing with:
mpz_cmp_d wrong (from check_infinity)
y 47 F0 00 00 00 00 00 00
This comes from the following lines in mini-gmp/tests/t-cmp_d.c:
double y = HUGE_VAL;
if (y != 2*y)
/* 2^5000 cmp inf */
mpz_set_ui (x, 1L);
mpz_mul_2exp (x, x, 5000L);
check_one ("check_infinity", x, y, -1, -1);
So, it seems that on that systems HUGE_VAL is defined as 3.40282e+38.
This probably is the larger value that can be represented, because the
function does not stop the test after the "if (y != 2*y) return;" check.
But in the function cmp_d, the double value is not multiplied, it is
divided... maybe if we change the initial test into "if (y != y/2)
return;", then the test is simply skipped in this case. May this be the
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