aarch64: Add tests for fabd, urecpe and ursqrt

Other instructions in the encoding group are tested in advsimd-fp16.d,
so add these instructions to the existing test file.
diff --git a/gas/testsuite/gas/aarch64/advsimd-fp16.d b/gas/testsuite/gas/aarch64/advsimd-fp16.d
index 4efa9e8..ffac0d3 100644
--- a/gas/testsuite/gas/aarch64/advsimd-fp16.d
+++ b/gas/testsuite/gas/aarch64/advsimd-fp16.d
@@ -69,6 +69,13 @@
  *[0-9a-f]+:	0ec31441 	fsub	v1\.4h, v2\.4h, v3\.4h
  *[0-9a-f]+:	4ec01400 	fsub	v0\.8h, v0\.8h, v0\.8h
  *[0-9a-f]+:	4ec31441 	fsub	v1\.8h, v2\.8h, v3\.8h
+ *[0-9a-f]+:	6ee3d441 	fabd	v1.2d, v2.2d, v3.2d
+ *[0-9a-f]+:	2ea3d441 	fabd	v1.2s, v2.2s, v3.2s
+ *[0-9a-f]+:	6ea3d441 	fabd	v1.4s, v2.4s, v3.4s
+ *[0-9a-f]+:	2ec01400 	fabd	v0.4h, v0.4h, v0.4h
+ *[0-9a-f]+:	2ec31441 	fabd	v1.4h, v2.4h, v3.4h
+ *[0-9a-f]+:	6ec01400 	fabd	v0.8h, v0.8h, v0.8h
+ *[0-9a-f]+:	6ec31441 	fabd	v1.8h, v2.8h, v3.8h
  *[0-9a-f]+:	4e63dc41 	fmulx	v1\.2d, v2\.2d, v3\.2d
  *[0-9a-f]+:	0e23dc41 	fmulx	v1\.2s, v2\.2s, v3\.2s
  *[0-9a-f]+:	4e23dc41 	fmulx	v1\.4s, v2\.4s, v3\.4s
@@ -323,6 +330,10 @@
  *[0-9a-f]+:	6e21c820 	fcvtau	v0\.4s, v1\.4s
  *[0-9a-f]+:	2e79c820 	fcvtau	v0\.4h, v1\.4h
  *[0-9a-f]+:	6e79c820 	fcvtau	v0\.8h, v1\.8h
+ *[0-9a-f]+:	0ea1c820 	urecpe	v0.2s, v1.2s
+ *[0-9a-f]+:	4ea1c820 	urecpe	v0.4s, v1.4s
+ *[0-9a-f]+:	2ea1c820 	ursqrte	v0.2s, v1.2s
+ *[0-9a-f]+:	6ea1c820 	ursqrte	v0.4s, v1.4s
  *[0-9a-f]+:	4e61d820 	scvtf	v0\.2d, v1\.2d
  *[0-9a-f]+:	0e21d820 	scvtf	v0\.2s, v1\.2s
  *[0-9a-f]+:	4e21d820 	scvtf	v0\.4s, v1\.4s
diff --git a/gas/testsuite/gas/aarch64/advsimd-fp16.s b/gas/testsuite/gas/aarch64/advsimd-fp16.s
index 6b86ded..2a09351 100644
--- a/gas/testsuite/gas/aarch64/advsimd-fp16.s
+++ b/gas/testsuite/gas/aarch64/advsimd-fp16.s
@@ -1,5 +1,6 @@
-/* simdhp.s Test file for AArch64 half-precision floating-point
-   vector instructions.  */
+/* Test file for AArch64 half-precision floating-point vector instructions.
+   This is also the only test for the single- and double-precison variants of
+   most of these instructions.  */
 
 	/* Vector three-same.  */
 
@@ -24,6 +25,7 @@
 	three_same fadd
 	three_same faddp
 	three_same fsub
+	three_same fabd
 	three_same fmulx
 	three_same fmul
 	three_same fcmeq
@@ -82,6 +84,11 @@
 	\op	v0.8h, v1.8h
 	.endm
 
+	.macro tworeg_misc_s, op
+	\op	v0.2s, v1.2s
+	\op	v0.4s, v1.4s
+	.endm
+
 	tworeg_misc fabs
 	tworeg_misc fneg
 
@@ -106,6 +113,8 @@
 
 	tworeg_misc fcvtas
 	tworeg_misc fcvtau
+	tworeg_misc_s urecpe
+	tworeg_misc_s ursqrte
 
 	tworeg_misc scvtf
 	tworeg_misc ucvtf