Testsuite check for sqrt_insn. Move pow/sqrt synth test from gcc.target/aarch64/ to to gcc.dg/

	* lib/target-supports.exp (check_effective_target_sqrt_insn): New check.
	* gcc.dg/pow-sqrt-synth-1.c: New test.
	* gcc.target/aarch64/pow-sqrt-synth-1.c: Delete.

	* doc/sourcebuild.texi (7.2.3.9 Other hardware attributes):
	Document sqrt_insn.

From-SVN: r223485

gcc/ChangeLog

+2015-05-21  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+	* doc/sourcebuild.texi (7.2.3.9 Other hardware attributes):
+	Document sqrt_insn.
+
 2015-05-21  Richard Biener  <rguenther@suse.de>
 
 	PR c++/66211

gcc/doc/sourcebuild.texi

@@ -1695,6 +1695,9 @@ Target supports FPU instructions.
 @item non_strict_align
 Target does not require strict alignment.
 
+@item sqrt_insn
+Target has a square root instruction that the compiler can generate.
+
 @item sse
 Target supports compiling @code{sse} instructions.
 

gcc/testsuite/ChangeLog

+2015-05-21  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+	* lib/target-supports.exp (check_effective_target_sqrt_insn): New check.
+	* gcc.dg/pow-sqrt-synth-1.c: New test.
+	* gcc.target/aarch64/pow-sqrt-synth-1.c: Delete.
+
 2015-05-21  Richard Biener  <rguenther@suse.de>
 
 	PR c++/66211

gcc/testsuite/gcc.target/aarch64/pow-sqrt-synth-1.c → gcc/testsuite/gcc.dg/pow-sqrt-synth-1.c

-/* { dg-do compile } */
+/* { dg-do compile { target sqrt_insn } } */
 /* { dg-options "-fdump-tree-sincos -Ofast --param max-pow-sqrt-depth=8" } */
-
+/* { dg-additional-options "-mfloat-abi=softfp -mfpu=neon-vfpv4" { target arm*-*-* } } */
 
 double
 foo (double a)
@@ -35,4 +35,4 @@ vecfoo (double *a)
 }
 
 /* { dg-final { scan-tree-dump-times "synthesizing" 7 "sincos" } } */
-/* { dg-final { cleanup-tree-dump "sincos" } } */
\ No newline at end of file
+/* { dg-final { cleanup-tree-dump "sincos" } } */

gcc/testsuite/lib/target-supports.exp

@@ -4670,6 +4670,27 @@ proc check_effective_target_vect_call_copysignf { } {
     return $et_vect_call_copysignf_saved
 }
 
+# Return 1 if the target supports hardware square root instructions.
+
+proc check_effective_target_sqrt_insn { } {
+    global et_sqrt_insn_saved
+
+    if [info exists et_sqrt_insn_saved] {
+	verbose "check_effective_target_hw_sqrt: using cached result" 2
+    } else {
+	set et_sqrt_insn_saved 0
+	if { [istarget x86_64-*-*]
+	     || [istarget powerpc*-*-*]
+	     || [istarget aarch64*-*-*]
+	     || ([istarget arm*-*-*] && [check_effective_target_arm_vfp_ok]) } {
+	   set et_sqrt_insn_saved 1
+	}
+    }
+
+    verbose "check_effective_target_hw_sqrt: returning et_sqrt_insn_saved" 2
+    return $et_sqrt_insn_saved
+}
+
 # Return 1 if the target supports vector sqrtf calls.
 
 proc check_effective_target_vect_call_sqrtf { } {