Fix asm codegen for vfpclasss* instructions when using -masm=intel

Author: antoyo

gcc/config/i386/sse.md

@@ -29012,7 +29012,8 @@
 	    UNSPEC_FPCLASS)
 	  (const_int 1)))]
    "TARGET_AVX512DQ || VALID_AVX512FP16_REG_MODE(<MODE>mode)"
-   "vfpclass<ssescalarmodesuffix>\t{%2, %1, %0<mask_scalar_merge_operand3>|%0<mask_scalar_merge_operand3>, %1, %2}";
+;; %X1 so that we don't emit any *WORD PTR for -masm=intel.
+   "vfpclass<ssescalarmodesuffix>\t{%2, %1, %0<mask_scalar_merge_operand3>|%0<mask_scalar_merge_operand3>, %X1, %2}";
   [(set_attr "type" "sse")
    (set_attr "length_immediate" "1")
    (set_attr "prefix" "evex")