Add missing mask[z]_scalef_round_s[d,s] intrinsics

Add missing mask[z]_scalef_round_s[d,s] intrinsics

gcc/
	* config/i386/avx512fintrin.h (_mm_mask_scalef_round_sd,
	_mm_maskz_scalef_round_sd, _mm_mask_scalef_round_ss,
	_mm_maskz_scalef_round_ss): New intrinsics.
	(__builtin_ia32_scalefsd_round, __builtin_ia32_scalefss_round): Fix.
	* config/i386/i386-builtin.def (__builtin_ia32_scalefsd_round,
	__builtin_ia32_scalefss_round): Remove.
	(__builtin_ia32_scalefsd_mask_round,
	__builtin_ia32_scalefss_mask_round): New intrinsics.
	* config/i386/sse.md (vmscalef<mode><round_name>): Renamed to ...
	(vmscalef<mode><mask_scalar_name><round_scalar_name>): ... this.
	((match_operand:VF_128 2 "<round_nimm_predicate>"
	"<round_constraint>")): Changed to ...
	((match_operand:VF_128 2 "<round_scalar_nimm_predicate>"
	"<round_scalar_constraint>")): ... this.
	("vscalef<ssescalarmodesuffix>\t{<round_op3>%2, %1, %0|
	%0, %1, %2<round_op3>}"): Changed to ...
	("vscalef<ssescalarmodesuffix>\t{<round_scalar_mask_op3>%2, %1,
	%0<mask_scalar_operand3>|%0<mask_scalar_operand3>, %1,
	%2<round_scalar_mask_op3>}"): ... this.
	* config/i386/subst.md (round_scalar_nimm_predicate): New.

gcc/testsuite/
	* gcc.target/i386/avx512f-vscalefsd-1.c (_mm_mask_scalef_round_sd,
	_mm_maskz_scalef_round_sd): Test new intrinsics.
	* gcc.target/i386/avx512f-vscalefsd-2.c (_mm_scalef_round_sd,
	_mm_mask_scalef_round_sd, _mm_maskz_scalef_round_sd): Test new
	intrinsics.
	* gcc.target/i386/avx512f-vscalefss-1.c (_mm_mask_scalef_round_ss,
	_mm_maskz_scalef_round_ss): Test new intrinsics.
	* gcc.target/i386/avx512f-vscalefss-2.c (_mm_scalef_round_ss,
	_mm_mask_scalef_round_ss, _mm_maskz_scalef_round_ss): Test new
	intrinsics.
	* gcc.target/i386/avx-1.c (__builtin_ia32_scalefsd_round,
	__builtin_ia32_scalefss_round): Remove builtin.
	(__builtin_ia32_scalefsd_mask_round,
	__builtin_ia32_scalefss_mask_round): Test new builtin.
	* gcc.target/i386/sse-13.c: Ditto.
	* gcc.target/i386/sse-23.c: Ditto.

From-SVN: r257578