Re: gcc bug?

[Randy Yates <qusraya at rtp dot ericsson dot se>]

Dear Martin and bug-gcc list:

The problem I was reporting yesterday was
from gcc 2.7.2.2. The newer version, 2.95.2,
does not display the problem. Thus I am 
considering this bug moot. Thank you anyway
for your support.

--Randy Yates



************copy of earlier message*****************

Hi,

I'm using the gcc compiler,



 [qusraya@edgedsp1] ~ $ gcc -v
Reading specs from /apps/gnu/solaris2.7/lib/gcc-lib/sparc-sun-solaris2.7/2.7.2.2/specs
gcc version 2.7.2.2



under the Sun OS,



[qusraya@edgedsp1] ~ $ uname -a
SunOS edgedsp1 5.7 Generic sun4u sparc SUNW,Ultra-5_10



I have noticed that my structures are not packed as tightly
as they could be. When I try to tighten them up by specifying
fpack-struct, I get the following messages:



[qusraya@edgedsp1] /vobs/edgedsp_sw/src/EDGE/hostif $ gcc -c -Wall -fpack-struct -I. -I../../include  hostif.c
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 8: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 10: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 12: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 14: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 16: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 18: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 20: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 22: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 24: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 26: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 28: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 30: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 32: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 34: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 36: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 38: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 40: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 42: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 44: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 46: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 48: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 50: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 52: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 54: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 56: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 58: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 60: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 62: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 64: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 66: error: location counter not on word boundary
/usr/ccs/bin/as: "/home/unix/qusraya/tmp/cc4oa4Pq.s", line 72: error: location counter not on word boundary


This appears to be a bug, or rather is it that I'm doing something wrong? I also
tried using the __attribute__((packed)) but it made no difference on the size
of the structure. Here's the structure:


typedef struct {
   UINT16_T                application_address_high;     /* DSP application address (high word) */
   UINT16_T                application_address_low;      /* DSP application address (low word) */
   unsigned                reserved :  15;               /* DSP ready */
   unsigned                dr       :  1;
   unsigned                reservedb:  15;               /* DSP PLL clock mode */
   unsigned                pcm      :  1;
   UINT16_T                dsp_version;                  /* DSP version */
   UINT16_T                low_softbit_cache_threshold;  /* low softbit cache threshold */
   UINT16_T                adequate_softbit_cache_threshold; /* adequate softbit cache threshold */
} INITIALIZATION_TABLE_T __attribute__((packed));

This structure can be packed to 7 16-bit words but instead the compiler always
generates it in 8 16-bit words. The special type UINT16_T:

typedef unsigned short UINT16_T;

is defined is dsptypes.h.

I have attached hostif.c, hostif.h, and dsptypes.h in order to help
you reproduce this error. 

Any help, pointers, acknowledgements of guilt, etc. would be appreciated.

-- 
Randy Yates
DSP Engineer
Ericsson / Research Triangle Park, NC, USA
qusraya@rtp.ericsson.se, 919-472-1124