mips.c (mips_rtx_costs): Handle FMA.

mips.c (mips_rtx_costs): Handle FMA.

gcc/
	* config/mips/mips.c (mips_rtx_costs): Handle FMA.
	* config/mips/mips.md (*madd4<mode>, *madd3<mode>, *msub4<mode>)
	(*msub3<mode>, *nmadd4<mode>_fastmath, *nmadd3<mode>_fastmath)
	(*nmsub4<mode>_fastmath, *nmsub3<mode>_fastmath): Delete.
	(*nmadd4<mode>, *nmadd3<mode>. *nmsub4<mode>, *nmsub3<mode>): Redefine
	to use FMA.
	(fma<mode>4, *fma<mode>4_madd3, *fma<mode>4_madd4): New patterns.
	(fms<mode>4, *fms<mode>4_msub3, *fms<mode>4_msub4): Likewise.
	(fnms<mode>4, *fnms<mode>4_nmadd3, *fnms<mode>4_nmadd4): Likewise.
	(fnma<mode>4, *fnma<mode>4_nmsub3, *fnma<mode>4_nmsub4): Likewise.

gcc/testsuite/
	* gcc.target/mips/mips.exp: Add support for -ffp-contract.
	* gcc.target/mips/fma-1.c: New test.
	* gcc.target/mips/fma-2.c: Likewise.
	* gcc.target/mips/fma-3.c: Likewise.
	* gcc.target/mips/fma-4.c: Likewise.
	* gcc.target/mips/fma-5.c: Likewise.
	* gcc.target/mips/fma-6.c: Likewise.
	* gcc.target/mips/fma-7.c: Likewise.
	* gcc.target/mips/fma-8.c: Likewise.
	* gcc.target/mips/fma-9.c: Likewise.
	* gcc.target/mips/fma-10.c: Likewise.
	* gcc.target/mips/fma-11.c: Likewise.
	* gcc.target/mips/fma-12.c: Likewise.
	* gcc.target/mips/fma-13.c: Likewise.
	* gcc.target/mips/fma-14.c: Likewise.
	* gcc.target/mips/fma-15.c: Likewise.
	* gcc.target/mips/fma-16.c: Likewise.
	* gcc.target/mips/fma-17.c: Likewise.
	* gcc.target/mips/fma-18.c: Likewise.
	* gcc.target/mips/fma-19.c: Likewise.
	* gcc.target/mips/fma-20.c: Likewise.

From-SVN: r166414