Re: gdb (ARM processor) casting issues in iwmmxt.c

[shanevolpe@gmail.com]

Michael,
I'm using 6.2 and 6.3, I will look at porting the cvs to the embedded
platform I'm using (openembedded.org)
Regards,
Shane

On 9/19/06, Michael Snyder <Michael.Snyder@palmsource.com> wrote:
>
> Are you on a branch?  The casts that you want to change
> don't seem to be in my version of the source file (which
> according to CVS, is up to date).
>
> Michael
>
>
> -----Original Message-----
> From: gdb-owner@sourceware.org on behalf of shanevolpe@gmail.com
> Sent: Tue 9/19/2006 4:43 AM
> To: gdb@sourceware.org
> Subject: gdb (ARM processor) casting issues in iwmmxt.c
>
> All,
> I tried compiling gdb client for the xscale processor and all works
> good but for some casting issues in iwmmxt.c  Here is what I found:
> There is casting occurring on the target:
>  (unsigned long) s1 = a * b;
>  I changed all the castings to only cast on the source and not
> target.. After my modifications everything compiled fine.  Below is a
> patch file with my changes.  I'm not sure if there is something I'm
> missing, I have never seen casting on the target before.
>
> Patch:
> --- gdb-6.3/sim/arm/iwmmxt~old.c    2003-03-27 12:13:33.000000000 -0500
> +++ gdb-6.3/sim/arm/iwmmxt.c        2006-09-18 15:26:05.000000000 -0400
> @@ -2114,7 +2114,7 @@
>
>        s = (signed long) a * (signed long) b;
>
> -      (signed long long) t += s;
> +      t += (signed long long)s;
>          }
>        else
>          {
> @@ -2130,7 +2130,7 @@
>      wR [BITS (12, 15)] = 0;
>
>    if (BIT (21))    /* Signed.  */
> -    (signed long long) wR[BITS (12, 15)] += (signed long long) t;
> +    wR[BITS (12, 15)] += (signed long long) t;
>    else
>      wR [BITS (12, 15)] += t;
>
> @@ -2166,7 +2166,7 @@
>        b = wRHALF (BITS (0, 3), i * 2);
>        b = EXTEND16 (b);
>
> -      (signed long) s1 = a * b;
> +      s1 = (signed long)a * (signed long)b;
>
>        a = wRHALF (BITS (16, 19), i * 2 + 1);
>        a = EXTEND16 (a);
> @@ -2174,7 +2174,7 @@
>        b = wRHALF (BITS (0, 3), i * 2 + 1);
>        b = EXTEND16 (b);
>
> -      (signed long) s2 = a * b;
> +      s2 = (signed long)a * (signed long)b;
>          }
>        else            /* Unsigned.  */
>          {
> @@ -2183,12 +2183,12 @@
>        a = wRHALF (BITS (16, 19), i * 2);
>        b = wRHALF (BITS ( 0,  3), i * 2);
>
> -      (unsigned long) s1 = a * b;
> +      s1 = (unsigned long)a *(unsigned long) b;
>
>        a = wRHALF (BITS (16, 19), i * 2 + 1);
>        b = wRHALF (BITS ( 0,  3), i * 2 + 1);
>
> -      (signed long) s2 = a * b;
> +      s2 = (signed long)a * (signed long)b;
>          }
>
>        r |= (ARMdword) ((s1 + s2) & 0xffffffff) << (i ? 32 : 0);
>
>
>
>
> --
> Registered Linux User: #293401
>
>


-- 
Registered Linux User: #293401