On Wednesday, 3 February 2016 at 07:45:23 UTC, Iain Buclaw wrote:
On 2 Feb 2016 7:50 pm, "Nikolay via Digitalmars-d" < [email protected]> wrote:

Is NetBSD similar to FreeBSD in that you have 80-bit reals but only the first 53 bits of the mantissa are used?

I don't know how accurate LDC is when it sets up compile time float properties. But what do you get when:

pragma (msg, real.sizeof);
pragma (msg, real.mant_dig);

Alternatively, use a C program with printfs for:

sizeof(long double)
LDBL_MANT_DIG

To make sure both ldc and gcc are agreeable.

Have a look at rt/dmain2.d (look for fldcw) if the problem is because of
what I describe above.

I suppose it is not similar FreeBSD ( according https://www.netbsd.org/changes/changes-7.0.html#x86 )

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