RE: [avr-gcc-list] Int32 Support

[Nigel Winterbottom]

> -----Original Message-----
> From: User Tomdean
> Sent: Monday, September 18, 2006 9:52 PM
> To: address@hidden
> Subject: Re: [avr-gcc-list] Int32 Support
>

> Something I forget:  C is a glorified assembly language!
>
> # cat xx.c
> #include <stdio.h>
> int main() {
>   uint8_t  z = sizeof(uint32_t);
>   uint32_t a = 0x00000001<<14;
>   uint32_t b = 0x00000001<<15;
>   uint32_t c = 0x00000001<<16;   /* produces a warning - see below */
>   return -1;
> }


You forget the standard 'c' gotcha:

external void fn(uint32_t, uint32_t);
int main() {
    uint32_t a = 0x10000000<<15;    /* produces no warning */
    uint32_t b = 0x1111000000000000;
    fn(a,b);                        //Use the variables
    return -1;
    }

No warning is given but the variable a is set to zero.

However, more worrying is that variable b is also zero. (Looks like the 0x
parser only does 16-bits)

Nigel