mips.h (CONSTANT_POOL_COST): Move to...

gcc/
2007-09-11  Richard Sandiford  <richard@codesourcery.com>
	    Nigel Stephens  <nigel@mips.com>
	    David Ung  <davidu@mips.com>
	
	* config/mips/mips.h (CONSTANT_POOL_COST): Move to...
	* config/mips/mips.c: ...here and set to 4 for TARGET_MIPS16.
	(mips16_constant_cost, mips_immediate_operand_p, mips_binary_cost)
	(mips_fp_mult_cost, mips_fp_div_cost, mips_sign_extend_cost)
	(mips_zero_extend_cost): New functions.
	(mips_rtx_costs): Treat COMPARE constants as having zero cost.
	Use the new functions.  Tweak many cost estimates, both here
	and in the new subroutines.  Return false when the cost of the
	operands has not been calculated.  Check for *clear_upper32.
	Check for floating-point multiply-add, reciprocal and rsqrt
	patterns.  Handle comparison and rotation codes.

Co-Authored-By: David Ung <davidu@mips.com>
Co-Authored-By: Nigel Stephens <nigel@mips.com>

From-SVN: r128364