hm...
superb then...
just try to compile sin/cos/whatever, run under gdb or msp430simu.
check results and compare them (bit to bit) with, say, i386 gcc.
The best way to do this probably will be something:
union cn {
float f;
long l;
};
union cn f1, f2;
int cmp ()
{
f1.f = sin(xxx);
f2.f = [value obtained from somewhere];
return f1.l== f2.l;
}
cheers,
~d
On Thu, 18 Apr 2002 20:15:35 -0700 (PDT)
David Dyck <[email protected]> wrote:
> On Thu, 18 Apr 2002 at 11:48 +0400, Dmitry <[email protected]> wrote:
>
> > NO... TI fp implementation is not IEEE 754 complaint... TI uses 40 bits
> > floats while gcc uses 32 bits IEEE 754 fp concepts.
>
> I just am looking at the manual for the free demo (IAR) compiler
> for the msp430, and it is documenting their floating point format
> as 4 bytes
>
> 31 - sign
> 30 - 23 exponent
> 22 - 0 Mantissa
>
> (-1)**s * s**(exponent-127) * 1.Mantissa
>
> It states that the values are stored in IEEE format
>
>
>
>
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