Hi,

  Since there is no response, I re-sent the fixed-point 
patch #2.  The patch #3 to #10 will be sent out soon.
(Note that these patches are managed by Quilt.)
Can maintainers review these patches?  Thanks a lot!

> 1. Merge in machine modes to support signed and unsigned
> fract and accum modes.  Handle scalar and vector modes.
DONE!
> 2. Merge in fixed-value.h and fixed-value.c to handle fixed-point values.
(fixed-value.diff)
> 3. Merge in TREE structures for fixed-point types and constants.
> 4. Merge in C front-end changes to parse _Sat, _Fract and _Accum.
> 5. Merge in RTL structures for fixed-point constants and operators.
> 6. Merge in libcpp to parse fixed-point constants.
> 7. Merge in changes to support "case" of FIXED_POINT_TYPE, FIXED_CST,
> and CONST_FIXED in .c and .h files.
> 8. Merge in the MIPS backend that supports fixed-point instructions.
> 9. Merge in configure/build system changes for the runtime library.
> 10. Merge in testsuite (from gcc.dg/fixed-point) that only run
> when the compiler is configured to enable fixed-point.

Regards,
Chao-ying

gcc/ChangeLog
2007-08-01  Chao-ying Fu  <fu@mips.com>

        * fixed-value.h: New file.
        * fixed-value.c: New file.
        * Makefile.in (OBJS-common): Add fixed-value.o.
        (fixed-value.o): New rule.
        (GTFILES): Add fixed-value.h.
        * double-int.c (double_int_scmp): Use casts of unsigned HOST_WIDE_INT
        to compare a.low and b.low.
        * gengtype.c (main): Handle FIXED_VALUE_TYPE type as scalar typedef.