[NDS32] Add intrinsic function for ffb, ffmism and flmism.

gcc/
	* config/nds32/constants.md (unspec_element): Add UNSPEC_FFB,
	UNSPEC_FFMISM and UNSPEC_FLMISM.
	* config/nds32/nds32-intrinsic.c (bdesc_2arg): Add builtin description
	for ffb, ffmism and flmism.
	* config/nds32/nds32-intrinsic.md (unspec_ffb): Define new pattern.
	(unspec_ffmism): Ditto.
	(unspec_flmism): Ditto.
	(nds32_expand_builtin_impl): Check if string extension is available.
	* config/nds32/nds32.h (nds32_builtins): Add NDS32_BUILTIN_FFB,
	NDS32_BUILTIN_FFMISM and NDS32_BUILTIN_FLMISM.

Co-Authored-By: Chung-Ju Wu <jasonwucj@gmail.com>
Co-Authored-By: Kito Cheng <kito.cheng@gmail.com>

From-SVN: r258424

gcc/ChangeLog

+2018-03-11  Monk Chiang  <sh.chiang04@gmail.com>
+	    Kito Cheng  <kito.cheng@gmail.com>
+	    Chung-Ju Wu  <jasonwucj@gmail.com>
+
+	* config/nds32/constants.md (unspec_element): Add UNSPEC_FFB,
+	UNSPEC_FFMISM and UNSPEC_FLMISM.
+	* config/nds32/nds32-intrinsic.c (bdesc_2arg): Add builtin description
+	for ffb, ffmism and flmism.
+	* config/nds32/nds32-intrinsic.md (unspec_ffb): Define new pattern.
+	(unspec_ffmism): Ditto.
+	(unspec_flmism): Ditto.
+	(nds32_expand_builtin_impl): Check if string extension is available.
+	* config/nds32/nds32.h (nds32_builtins): Add NDS32_BUILTIN_FFB,
+	NDS32_BUILTIN_FFMISM and NDS32_BUILTIN_FLMISM.
+
 2018-03-10  Vladimir Makarov  <vmakarov@redhat.com>
 
 	Reverting patch:

gcc/config/nds32/constants.md

@@ -32,6 +32,9 @@
 
 ;; The unpec operation index.
 (define_c_enum "unspec_element" [
+  UNSPEC_FFB
+  UNSPEC_FFMISM
+  UNSPEC_FLMISM
   UNSPEC_UALOAD_HW
   UNSPEC_UALOAD_W
   UNSPEC_UALOAD_DW

gcc/config/nds32/nds32-intrinsic.c

@@ -257,6 +257,9 @@ static struct builtin_description bdesc_1argimm[] =
 /* Intrinsics that take two arguments.  */
 static struct builtin_description bdesc_2arg[] =
 {
+  NDS32_BUILTIN(unspec_ffb, "ffb", FFB)
+  NDS32_BUILTIN(unspec_ffmism, "ffmsim", FFMISM)
+  NDS32_BUILTIN(unspec_flmism, "flmism", FLMISM)
   NDS32_NO_TARGET_BUILTIN(unspec_volatile_mtsr, "mtsr", MTSR)
   NDS32_NO_TARGET_BUILTIN(unspec_volatile_mtusr, "mtusr", MTUSR)
   NDS32_NO_TARGET_BUILTIN(unaligned_store_hw, "unaligned_store_hw", UASTORE_HW)
@@ -277,6 +280,23 @@ nds32_expand_builtin_impl (tree exp,
   unsigned i;
   struct builtin_description *d;
 
+  switch (fcode)
+    {
+    /* String Extension  */
+    case NDS32_BUILTIN_FFB:
+    case NDS32_BUILTIN_FFMISM:
+    case NDS32_BUILTIN_FLMISM:
+      if (!TARGET_EXT_STRING)
+	{
+	  error ("don't support string extension instructions");
+	  return NULL_RTX;
+	}
+      break;
+
+    default:
+      break;
+    }
+
   /* Since there are no result and operands, we can simply emit this rtx.  */
   switch (fcode)
     {

gcc/config/nds32/nds32-intrinsic.md

@@ -94,6 +94,40 @@
   [(set_attr "type" "misc")]
 )
 
+;; String Extension
+
+(define_insn "unspec_ffb"
+  [(set (match_operand:SI 0 "register_operand" "=r, r")
+	(unspec:SI [(match_operand:SI 1 "register_operand" "r, r")
+		    (match_operand:SI 2 "nonmemory_operand" "Iu08, r")] UNSPEC_FFB))]
+  ""
+  "@
+  ffbi\t%0, %1, %2
+  ffb\t%0, %1, %2"
+  [(set_attr "type" "alu")
+   (set_attr "length" "4")]
+)
+
+(define_insn "unspec_ffmism"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+	(unspec:SI [(match_operand:SI 1 "register_operand" "r")
+		    (match_operand:SI 2 "register_operand" "r")] UNSPEC_FFMISM))]
+  ""
+  "ffmism\t%0, %1, %2"
+  [(set_attr "type" "alu")
+   (set_attr "length" "4")]
+)
+
+(define_insn "unspec_flmism"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+	(unspec:SI [(match_operand:SI 1 "register_operand" "r")
+		    (match_operand:SI 2 "register_operand" "r")] UNSPEC_FLMISM))]
+  ""
+  "flmism\t%0, %1, %2"
+  [(set_attr "type" "alu")
+   (set_attr "length" "4")]
+)
+
 ;;Unaligned Load/Store
 
 (define_expand "unaligned_load_hw"

gcc/config/nds32/nds32.h

@@ -346,6 +346,9 @@ enum nds32_builtins
   NDS32_BUILTIN_MTUSR,
   NDS32_BUILTIN_SETGIE_EN,
   NDS32_BUILTIN_SETGIE_DIS,
+  NDS32_BUILTIN_FFB,
+  NDS32_BUILTIN_FFMISM,
+  NDS32_BUILTIN_FLMISM,
   NDS32_BUILTIN_UALOAD_HW,
   NDS32_BUILTIN_UALOAD_W,
   NDS32_BUILTIN_UALOAD_DW,