std.math.frexp wrong on ARM

[Don Clugston]

On 26/09/12 17:13, Johannes Pfau wrote:
> The frexp test fails on ARM. I think the mask in line 1491 is
> wrong:
>
> https://github.com/D-Programming-Language/phobos/blob/master/std/math.d#L1491
> For doubles, the 63 bit is sign, 62-52 are exponent and 51-0 are
> mantissa.
> The mask manipulates the bits 63-48 (ushort, 16bit)
> 0x8000 is 0b1000000000000000
> so it preserves the sign, but not the 4 bits of the mantissa? I think
> it should be
> 0b1000000000001111 (0x800F)?
> This also fixes the test case on ARM.
>
> But I don't know much about this stuff, so I wonder if this is correct?

You are correct. I will fix.

At least, it's good that the tests caught that.