[patch] Fixed-point patch 9/10

["Fu, Chao-Ying" <fu@mips.com>]

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Hi,

  Here is the patch #9.  Please review it.  Thanks!

> 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.
(tree.diff)
> 4. Merge in C front-end changes to parse _Sat, _Fract and _Accum.
(c-parser.diff)
> 5. Merge in RTL structures for fixed-point constants and operators.
(rtl.diff)
> 6. Merge in libcpp to parse fixed-point constants.
(cpp.diff)
> 7. Merge in changes to support "case" of FIXED_POINT_TYPE, FIXED_CST,
> and CONST_FIXED in .c and .h files.
(changes.diff)
> 8. Merge in the MIPS backend that supports fixed-point instructions.
(mips.diff)
> 9. Merge in configure/build system changes for the runtime library.
(libgcc.diff)
> 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>

	* config/fixed-bit.h: New file.
	* config/fixed-bit.c: New file.
	* doc/libgcc.texi (Fixed-point fractional library routines): New node.

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

	* fixed-obj.mk: New file to support fine-grain fixed-point functions.
	* Makefile.in (fixed_point): Define.
	Check if fixed_point is yes to build support functions.
	* configure.ac: Check for fixed_point support.
	* configure: Regenerated.

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