Many AVX512 vector operations can broadcast from a scalar memory source.
This patch enables memory broadcast for FMSUB operations.  In order to
support AVX512 memory broadcast for FMSUB, FMSUB builtin functions are
also added, instead of passing the negated value to FMA builtin functions.

gcc/

	PR target/72782
	* config/i386/avx512fintrin.h (_mm512_fmsub_round_pd): Use
	__builtin_ia32_vfmsubpd512_mask.
	(_mm512_mask_fmsub_round_pd): Likewise.
	(_mm512_fmsub_pd): Likewise.
	(_mm512_mask_fmsub_pd): Likewise.
	(_mm512_maskz_fmsub_round_pd): Use
	__builtin_ia32_vfmsubpd512_maskz.
	(_mm512_maskz_fmsub_pd): Likewise.
	(_mm512_fmsub_round_ps): Use __builtin_ia32_vfmsubps512_mask.
	(_mm512_mask_fmsub_round_ps): Likewise.
	(_mm512_fmsub_ps): Likewise.
	(_mm512_mask_fmsub_ps): Likewise.
	(_mm512_maskz_fmsub_round_ps): Use
	__builtin_ia32_vfmsubps512_maskz.
	(_mm512_maskz_fmsub_ps): Likewise.
	* config/i386/avx512vlintrin.h (_mm256_mask_fmsub_pd): Use
	__builtin_ia32_vfmsubpd256_mask.
	(_mm256_maskz_fmsub_pd): Use __builtin_ia32_vfmsubpd256_maskz.
	(_mm_mask_fmsub_pd): Use __builtin_ia32_vfmaddpd128_mask
	(_mm_maskz_fmsub_pd): Use __builtin_ia32_vfmsubpd128_maskz.
	(_mm256_mask_fmsub_ps): Use __builtin_ia32_vfmsubps256_mask.
	(_mm256_mask_fmsub_ps): Use __builtin_ia32_vfmsubps256_mask.
	(_mm256_maskz_fmsub_ps): Use __builtin_ia32_vfmsubps256_maskz.
	(_mm_mask_fmsub_ps): Use __builtin_ia32_vfmsubps128_mask.
	(_mm_maskz_fmsub_ps): Use __builtin_ia32_vfmsubps128_maskz.
	* config/i386/fmaintrin.h (_mm_fmsub_pd): Use
	__builtin_ia32_vfmsubpd.
	(_mm256_fmsub_pd): Use __builtin_ia32_vfmsubpd256.
	(_mm_fmsub_ps): Use __builtin_ia32_vfmsubps.
	(_mm256_fmsub_ps): Use __builtin_ia32_vfmsubps256.
	(_mm_fmsub_sd): Use __builtin_ia32_vfmsubsd3.
	(_mm_fmsub_ss): Use __builtin_ia32_vfmsubss3.
	* config/i386/i386-builtin.def: Add
	__builtin_ia32_vfmsubpd256_mask,
	__builtin_ia32_vfmsubpd256_maskz,
	__builtin_ia32_vfmsubpd128_mask,
	__builtin_ia32_vfmsubpd128_maskz,
	__builtin_ia32_vfmsubps256_mask,
	__builtin_ia32_vfmsubps256_maskz,
	__builtin_ia32_vfmsubps128_mask,
	__builtin_ia32_vfmsubps128_maskz,
	__builtin_ia32_vfmsubpd512_mask,
	__builtin_ia32_vfmsubpd512_maskz,
	__builtin_ia32_vfmsubps512_mask,
	__builtin_ia32_vfmsubps512_maskz, __builtin_ia32_vfmsubss3,
	__builtin_ia32_vfmsubsd3, __builtin_ia32_vfmsubps,
	__builtin_ia32_vfmsubpd, __builtin_ia32_vfmsubps256 and.
	__builtin_ia32_vfmsubpd256.
	* config/i386/sse.md (fma4i_fmsub_<mode>): New.
	(<avx512>_fmsub_<mode>_maskz<round_expand_name>): Likewise.
	(*<sd_mask_codefor>fma_fmsub_<mode><sd_maskz_name>_bcst_1):
	Likewise.
	(*<sd_mask_codefor>fma_fmsub_<mode><sd_maskz_name>_bcst_2):
	Likewise.
	(*<sd_mask_codefor>fma_fmsub_<mode><sd_maskz_name>_bcst_3):
	Likewise.
	(fmai_vmfmsub_<mode><round_name>): Likewise.

gcc/testsuite/

	PR target/72782
	* gcc.target/i386/avx512f-fmsub-df-zmm-1.c: New test.
	* gcc.target/i386/avx512f-fmsub-sf-zmm-1.c: Likewise.
	* gcc.target/i386/avx512f-fmsub-sf-zmm-2.c: Likewise.
	* gcc.target/i386/avx512f-fmsub-sf-zmm-3.c: Likewise.
	* gcc.target/i386/avx512f-fmsub-sf-zmm-4.c: Likewise.
	* gcc.target/i386/avx512f-fmsub-sf-zmm-5.c: Likewise.
	* gcc.target/i386/avx512f-fmsub-sf-zmm-6.c: Likewise.
	* gcc.target/i386/avx512f-fmsub-sf-zmm-7.c: Likewise.
	* gcc.target/i386/avx512f-fmsub-sf-zmm-8.c: Likewise.
	* gcc.target/i386/avx512vl-fmsub-sf-xmm-1.c: Likewise.
	* gcc.target/i386/avx512vl-fmsub-sf-ymm-1.c: Likewise.

From-SVN: r265356