Remove separate movtf pattern - Use an iterator for all FP modes.

    
movtf is unnecessary as a separate expander. Move this to be with
the standard scalar floating point expanders.

Achieved by adding a new iterator and then using the same.

Tested cross aarch64-none-elf and no regressions.

Rebased version from https://gcc.gnu.org/ml/gcc-patches/2015-09/msg00767.html


2015-09-10  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>

	PR target/63304
        * config/aarch64/aarch.md (mov<mode>:GPF_F16): Use GPF_TF_F16.
        (movtf): Delete.
        * config/aarch64/iterators.md (GPF_TF_F16): New.
        (GPF_F16): Delete.

From-SVN: r227679

gcc/ChangeLog

+2015-09-10  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
+
+	PR target/63304
+        * config/aarch64/aarch.md (mov<mode>:GPF_F16): Use GPF_TF_F16.
+        (movtf): Delete.
+        * config/aarch64/iterators.md (GPF_TF_F16): New.
+        (GPF_F16): Delete.
+
 2015-09-10  Nathan Sidwell  <nathan@acm.org>
 
 	* config/nvptx/nvptx.c (nvptx_expand_call): Add spacing.

gcc/config/aarch64/aarch64.md

@@ -1099,8 +1099,8 @@
 })
 
 (define_expand "mov<mode>"
-  [(set (match_operand:GPF_F16 0 "nonimmediate_operand" "")
-	(match_operand:GPF_F16 1 "general_operand" ""))]
+  [(set (match_operand:GPF_TF_F16 0 "nonimmediate_operand" "")
+	(match_operand:GPF_TF_F16 1 "general_operand" ""))]
   ""
   {
     if (!TARGET_FLOAT)
@@ -1174,24 +1174,6 @@
                      f_loadd,f_stored,load1,store1,mov_reg")]
 )
 
-(define_expand "movtf"
-  [(set (match_operand:TF 0 "nonimmediate_operand" "")
-	(match_operand:TF 1 "general_operand" ""))]
-  ""
-  {
-    if (!TARGET_FLOAT)
-      {
-	aarch64_err_no_fpadvsimd (TFmode, "code");
-	FAIL;
-      }
-
-    if (GET_CODE (operands[0]) == MEM
-        && ! (GET_CODE (operands[1]) == CONST_DOUBLE
-	      && aarch64_float_const_zero_rtx_p (operands[1])))
-      operands[1] = force_reg (TFmode, operands[1]);
-  }
-)
-
 (define_insn "*movtf_aarch64"
   [(set (match_operand:TF 0
 	 "nonimmediate_operand" "=w,?&r,w ,?r,w,?w,w,m,?r ,Ump,Ump")

gcc/config/aarch64/iterators.md

@@ -38,8 +38,8 @@
 ;; Iterator for General Purpose Floating-point registers (32- and 64-bit modes)
 (define_mode_iterator GPF [SF DF])
 
-;; Iterator for General Purpose Float registers, inc __fp16.
-(define_mode_iterator GPF_F16 [HF SF DF])
+;; Iterator for all scalar floating point modes (HF, SF, DF and TF)
+(define_mode_iterator GPF_TF_F16 [HF SF DF TF])
 
 ;; Double vector modes.
 (define_mode_iterator VDF [V2SF V4HF])