Add missing REDUCE[SD,SS] intrinsics

Add missing REDUCE[SD,SS] intrinsics

gcc/
	* config/i386/avx512dqintrin.h (_mm_mask_reduce_sd,
	_mm_maskz_reduce_sd, _mm_mask_reduce_ss,=20
	_mm_maskz_reduce_ss): New.
	* config/i386/i386-builtin.def (__builtin_ia32_reducesd_mask,
	__builtin_ia32_reducess_mask): Ditto..
	(__builtin_ia32_reducesd, __builtin_ia32_reducess): Remove.
	* config/i386/sse.md (reduces<mode>): Renamed to ...
	(reduces<mode><mask_scalar_name>): ... this.
	(vreduce<ssescalarmodesuffix>\t{%3, %2, %1, %0|%0, %1, %2, %3}): Changed
	to ...
	(vreduce<ssescalarmodesuffix>\t{%3, %2, %1, %0<mask_scalar_operand4>|
	%0<mask_scalar_operand4>, %1, %2, %3}): ... this.

gcc/testsuite/
	* gcc.target/i386/avx512dq-vreducesd-1.c (_mm_mask_reduce_sd,
	_mm_maskz_reduce_sd): Test new intrinsics.
	* gcc.target/i386/avx512dq-vreducesd-2.c: New.
	* gcc.target/i386/avx512dq-vreducess-1.c (_mm_mask_reduce_ss,
	_mm_maskz_reduce_ss): Test new intrinsics.
	* gcc.target/i386/avx512dq-vreducess-2.c: New.
	* gcc.target/i386/avx-1.c (__builtin_ia32_reducesd,
	__builtin_ia32_reducess): Remove builtin.
	(__builtin_ia32_reducesd_mask,
	__builtin_ia32_reducess_mask): Test new builtin.
	* gcc.target/i386/sse-13.c: Ditto.
	* gcc.target/i386/sse-23.c: Ditto.

From-SVN: r253803