bootstrap/3188: I define bit fields in a long long, union the long long, and print.

[khundzinski-pdr-ca at worldnet dot att dot net]

>Number:         3188
>Category:       bootstrap
>Synopsis:       I define bit fields in a  long long, union the long long, and print.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Jun 14 15:46:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Kenneth Hundzinski
>Release:        unknown-1.0
>Organization:
>Environment:
QNX 
>Description:
I print the long long variable in hex as a long long, as 32 bit integer, as short int, and as char to check out the bit fields.  The long long hex print prints 0's in the first word.
>How-To-Repeat:
compile and run
>Fix:
don't know
>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: text/plain; name="bt_test64.c"
Content-Disposition: inline; filename="bt_test64.c"

#include <stdio.h>

int main()
{
struct lw_bit_test
{
  unsigned long long w0_b_0_7        :8;
  unsigned long long w0_b_8_14       :7;
  unsigned long long w0_b_15_20      :6;
  unsigned long long w0_b_21_25      :5;
  unsigned long long w0_b_26_29     :4;
  unsigned long long w0_b_30_31     :2;
  
  unsigned long long w0_b_32_40   :9;
  unsigned long long w0_b_41_50   :10;
  unsigned long long w0_b_51_61   :11;
  unsigned long long w0_b_62_63   :2;
};

struct w_bit_test
{
  unsigned short s0_b_0_3       :4;
  unsigned short s0_b_4_6       :3;
  unsigned short s0_b_7_8       :2;
  unsigned short s0_b_9         :1;
  unsigned short s0_b_10_15    :6;
  
  unsigned int s1_b_0_5         :6;
  unsigned int s1_b_6           :1;
  unsigned int s1_b_7_8         :2;
  unsigned int s1_b_9_11        :3;
  unsigned int s1_b_12_15      :4;

  unsigned short s2_b_0_3      :4;
  unsigned short s2_b_4_6      :3;
  unsigned short s2_b_7_8      :2;
  unsigned short s2_b_9        :1;
  unsigned short s2_b_10_15   :6;
  
  unsigned int s3_b_0_5        :6;
  unsigned int s3_b_6          :1;
  unsigned int s3_b_7_8       :2;
  unsigned int s3_b_9_11      :3;
  unsigned int s3_b_12_15    :4;
};

union 
{
  struct lw_bit_test  lbt;
  unsigned long long  uli;
  unsigned short  s_a [4];
  unsigned int  i_a [2];
  unsigned char  ch_a [8];
} ul;


//union 
//{
//  struct s_bit_test sbt;
//  unsigned short sa [4];  
//} us;  


  ul.lbt.w0_b_0_7    =  8;
  ul.lbt.w0_b_8_14   =  7;
  ul.lbt.w0_b_15_20  =  6;
  ul.lbt.w0_b_21_25  =  5;
  ul.lbt.w0_b_26_29  =  4;
  ul.lbt.w0_b_30_31  =  2;
  
  ul.lbt.w0_b_32_40  =  9;
  ul.lbt.w0_b_41_50  =  10;
  ul.lbt.w0_b_51_61  =  11;
  ul.lbt.w0_b_62_63  =   2;

//
  fprintf(stdout, "union  a=%p  l=%d \n", &ul, sizeof(ul) );

  fprintf (stdout, "64 bit a=%p l=%d     %016x \n", &ul.uli, sizeof(ul.uli), (long long) ul.uli );

//------
  fprintf (stdout, "32 bit 0,1 a=%p %p l=%d %d  %08x %08x \n",
      &ul.i_a[0], &ul.i_a[1], sizeof(ul.i_a), sizeof(ul.i_a),ul.i_a [0], ul.i_a [1] );

//---------------------------------
  fprintf (stdout, "s wd a=%p  %p %p %p  l=%d  %d %d %d \n",
      &ul.s_a [0], &ul.s_a [1], &ul.s_a [2], &ul.s_a [3], 
      sizeof (ul.s_a [0]), sizeof (ul.s_a [1]), sizeof (ul.s_a [2]), sizeof (ul.s_a [3] ));

  fprintf (stdout, " s word 0,1,2,3  %04x %04x %04x %04x   \n",
     ul.s_a [0], ul.s_a [1],  ul.s_a [2], ul.s_a [3]);

//---------------------------------

  fprintf(stdout, " char a=  %p %p %p %p %p %p %p %p \n",
                       &ul.ch_a[0],&ul.ch_a[1],&ul.ch_a[2],&ul.ch_a[3],
                       &ul.ch_a[4],&ul.ch_a[5],&ul.ch_a[6],&ul.ch_a[7] );



  fprintf(stdout, " char  l=  %d %d %d %d %d %d %d %d \n",
                       sizeof(ul.ch_a[0]), sizeof(ul.ch_a[1]), sizeof(ul.ch_a[2]), sizeof(ul.ch_a[3]),
                       sizeof(ul.ch_a[4]), sizeof(ul.ch_a[5]), sizeof(ul.ch_a[6]), sizeof(ul.ch_a[7]) );                       

  fprintf(stdout, " char %02x %02x %02x %02x %02x %02x %02x %02x ",
                       ul.ch_a[0],ul.ch_a[1],ul.ch_a[2],ul.ch_a[3],
                       ul.ch_a[4],ul.ch_a[5],ul.ch_a[6],ul.ch_a[7] );


//  fprintf (stdout, " short word 2,3  %04x %04x %04x %04x %04x %04x %04x %04x   \n",
//         ul.s_a [2], ul.s_a [3] );  

//  fprintf (stdout, " long word  %04x %04x %04x %04x %04x %04x %04x %04x

  
  fprintf (stdout, "End of Job\n");
}