Index: include/clang/Basic/BuiltinsX86.def
===================================================================
--- include/clang/Basic/BuiltinsX86.def
+++ include/clang/Basic/BuiltinsX86.def
@@ -1962,6 +1962,14 @@
 TARGET_BUILTIN(__builtin_ia32_rsqrt14pd256_mask, "V4dV4dV4dUc","","avx512vl")
 TARGET_BUILTIN(__builtin_ia32_rsqrt14ps128_mask, "V4fV4fV4fUc","","avx512vl")
 TARGET_BUILTIN(__builtin_ia32_rsqrt14ps256_mask, "V8fV8fV8fUc","","avx512vl")
+TARGET_BUILTIN(__builtin_ia32_fpclasspd128_mask, "UcV2dIiUc","","avx512dq,avx512vl")
+TARGET_BUILTIN(__builtin_ia32_fpclasspd256_mask, "UcV4dIiUc","","avx512dq,avx512vl")
+TARGET_BUILTIN(__builtin_ia32_fpclassps128_mask, "UcV4fIiUc","","avx512dq,avx512vl")
+TARGET_BUILTIN(__builtin_ia32_fpclassps256_mask, "UcV8fIiUc","","avx512dq,avx512vl")
+TARGET_BUILTIN(__builtin_ia32_fpclassps512_mask, "UsV16fIiUs","","avx512dq")
+TARGET_BUILTIN(__builtin_ia32_fpclasspd512_mask, "UcV8dIiUc","","avx512dq")
+TARGET_BUILTIN(__builtin_ia32_fpclasssd_mask, "UcV2dIiUc","","avx512dq")
+TARGET_BUILTIN(__builtin_ia32_fpclassss_mask, "UcV4fIiUc","","avx512dq")
 
 #undef BUILTIN
 #undef TARGET_BUILTIN
Index: lib/Headers/avx512dqintrin.h
===================================================================
--- lib/Headers/avx512dqintrin.h
+++ lib/Headers/avx512dqintrin.h
@@ -773,6 +773,45 @@
   (__m512) __builtin_ia32_reduceps512_mask ((__v16sf) __A, __B,      \
                (__v16sf) _mm512_setzero_ps(), (__mmask16) __U, __R);})
 
+#define _mm512_mask_fpclass_ps_mask( __U, __A, __imm) __extension__ ({ \
+__builtin_ia32_fpclassps512_mask ((__v16sf)( __A),\
+                  ( __imm),\
+                  ( __U));\
+})
+
+#define _mm512_fpclass_ps_mask( __A, __imm) __extension__ ({ \
+__builtin_ia32_fpclassps512_mask ((__v16sf)( __A),\
+                   ( __imm),\
+                   (__mmask16) -1);\
+})
+
+#define _mm512_mask_fpclass_pd_mask( __U, __A, __imm) __extension__ ({ \
+__builtin_ia32_fpclasspd512_mask ((__v8df)( __A),\
+                  ( __imm),( __U));\
+})
+
+#define _mm512_fpclass_pd_mask( __A, __imm) __extension__ ({ \
+__builtin_ia32_fpclasspd512_mask ((__v8df)( __A),\
+                  ( __imm),\
+                  (__mmask8) -1);\
+})
+
+#define _mm_fpclass_sd_mask( __A, __imm) __extension__ ({ \
+__builtin_ia32_fpclasssd_mask ((__v2df)( __A), ( __imm), (__mmask8) -1);\
+})
+
+#define _mm_fpclass_sd_mask( __U,__A, __imm) __extension__ ({ \
+__builtin_ia32_fpclasssd_mask ((__v2df)( __A), ( __imm), (__mmask8) __U);\
+})
+
+#define _mm_fpclass_ss_mask( __A, __imm) __extension__ ({ \
+__builtin_ia32_fpclassss_mask ((__v4sf)( __A), ( __imm), (__mmask8) -1);\
+})
+
+#define _mm_mask_fpclass_ss_mask(__U ,__A, __imm) __extension__ ({ \
+__builtin_ia32_fpclassss_mask ((__v4sf)( __A), ( __imm), (__mmask8) __U);\
+})
+
 #undef __DEFAULT_FN_ATTRS
 
 #endif
Index: lib/Headers/avx512vldqintrin.h
===================================================================
--- lib/Headers/avx512vldqintrin.h
+++ lib/Headers/avx512vldqintrin.h
@@ -948,6 +948,50 @@
   (__m256) __builtin_ia32_reduceps256_mask ((__v8sf) __A, __B,     \
                 (__v8sf) _mm256_setzero_ps(), (__mmask8) __U); })
 
+#define _mm_mask_fpclass_pd_mask( __U, __A, __imm) __extension__ ({ \
+__builtin_ia32_fpclasspd128_mask ((__v2df)( __A),\
+                 ( __imm),( __U));\
+})
+
+#define _mm_fpclass_pd_mask( __A, __imm) __extension__ ({ \
+__builtin_ia32_fpclasspd128_mask ((__v2df)( __A),\
+                  ( __imm),\
+                  (__mmask8) -1);\
+})
+
+#define _mm256_mask_fpclass_pd_mask( __U, __A, __imm) __extension__ ({ \
+__builtin_ia32_fpclasspd256_mask ((__v4df)( __A),\
+                  ( __imm),( __U));\
+})
+
+#define _mm256_fpclass_pd_mask( __A, __imm) __extension__ ({ \
+__builtin_ia32_fpclasspd256_mask ((__v4df)( __A),\
+                  ( __imm),\
+                  (__mmask8) -1);\
+})
+
+#define _mm_mask_fpclass_ps_mask( __U, __A, __imm) __extension__ ({ \
+__builtin_ia32_fpclassps128_mask ((__v4sf)( __A),\
+                  ( __imm),( __U));\
+})
+
+#define _mm_fpclass_ps_mask( __A, __imm) __extension__ ({ \
+__builtin_ia32_fpclassps128_mask ((__v4sf)( __A),\
+                  ( __imm),\
+                  (__mmask8) -1);\
+})
+
+#define _mm256_mask_fpclass_ps_mask( __U, __A, __imm) __extension__ ({ \
+__builtin_ia32_fpclassps256_mask ((__v8sf)( __A),\
+                  ( __imm),( __U));\
+})
+
+#define _mm256_fpclass_ps_mask( __A, __imm) __extension__ ({ \
+__builtin_ia32_fpclassps256_mask ((__v8sf)( __A),\
+                  ( __imm),\
+                  (__mmask8) -1);\
+})
+
 #undef __DEFAULT_FN_ATTRS
 
 #endif