[ARM][GAS] ARMv8.2 should enable ARMv8.1 NEON instructions.

GAS fails to recognize march=armv8.2-a as a superset of march=armv8.1-a
when assembling NEON instructions. The patch corrects this, making
-march=armv8.2-a -mfpu=neon-fp-armv8 enable the NEON intructions
introduced with ARMv8.1-A.

include/
2016-06-30  Matthew Wahab  <matthew.wahab@arm.com>

	* opcode/arm.h (ARM_ARCH_V8_2a): Add FPU_NEON_EXT_RDMA to the set
	of enabled FPU features.

gas/
2016-06-30  Matthew Wahab  <matthew.wahab@arm.com>

	* testsuite/gas/arm/armv8_2+rdma.d: New.

gas/ChangeLog

@@ -1,3 +1,7 @@
+2016-06-30  Matthew Wahab  <matthew.wahab@arm.com>
+
+	* testsuite/gas/arm/armv8_2+rdma.d: New.
+
 2016-06-29  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* NEWS: Mention --enable-compressed-debug-sections=gas is the

gas/testsuite/gas/arm/armv8_2+rdma.d

@@ -0,0 +1,79 @@
+#name: Valid ARMv8.2-A with ARMv8.1-A NEON instructions.
+#as: -march=armv8.2-a -mfpu=neon-fp-armv8
+#objdump: -dr
+#skip: *-*-*coff *-*-pe *-*-wince *-*-*aout* *-*-netbsd
+#source: armv8-a+rdma.s
+
+.*: +file format .*arm.*
+
+
+Disassembly of section .text:
+
+00000000 <.*>:
+   0:	f3110b12 	vqrdmlah.s16	d0, d1, d2
+   4:	f3120b54 	vqrdmlah.s16	q0, q1, q2
+   8:	f3210b12 	vqrdmlah.s32	d0, d1, d2
+   c:	f3220b54 	vqrdmlah.s32	q0, q1, q2
+  10:	f3110c12 	vqrdmlsh.s16	d0, d1, d2
+  14:	f3120c54 	vqrdmlsh.s16	q0, q1, q2
+  18:	f3210c12 	vqrdmlsh.s32	d0, d1, d2
+  1c:	f3220c54 	vqrdmlsh.s32	q0, q1, q2
+  20:	f2910e42 	vqrdmlah.s16	d0, d1, d2\[0\]
+  24:	f2910e4a 	vqrdmlah.s16	d0, d1, d2\[1\]
+  28:	f2910e62 	vqrdmlah.s16	d0, d1, d2\[2\]
+  2c:	f2910e6a 	vqrdmlah.s16	d0, d1, d2\[3\]
+  30:	f3920e42 	vqrdmlah.s16	q0, q1, d2\[0\]
+  34:	f3920e4a 	vqrdmlah.s16	q0, q1, d2\[1\]
+  38:	f3920e62 	vqrdmlah.s16	q0, q1, d2\[2\]
+  3c:	f3920e6a 	vqrdmlah.s16	q0, q1, d2\[3\]
+  40:	f2a10e42 	vqrdmlah.s32	d0, d1, d2\[0\]
+  44:	f2a10e62 	vqrdmlah.s32	d0, d1, d2\[1\]
+  48:	f3a20e42 	vqrdmlah.s32	q0, q1, d2\[0\]
+  4c:	f3a20e62 	vqrdmlah.s32	q0, q1, d2\[1\]
+  50:	f2910f42 	vqrdmlsh.s16	d0, d1, d2\[0\]
+  54:	f2910f4a 	vqrdmlsh.s16	d0, d1, d2\[1\]
+  58:	f2910f62 	vqrdmlsh.s16	d0, d1, d2\[2\]
+  5c:	f2910f6a 	vqrdmlsh.s16	d0, d1, d2\[3\]
+  60:	f3920f42 	vqrdmlsh.s16	q0, q1, d2\[0\]
+  64:	f3920f4a 	vqrdmlsh.s16	q0, q1, d2\[1\]
+  68:	f3920f62 	vqrdmlsh.s16	q0, q1, d2\[2\]
+  6c:	f3920f6a 	vqrdmlsh.s16	q0, q1, d2\[3\]
+  70:	f2a10f42 	vqrdmlsh.s32	d0, d1, d2\[0\]
+  74:	f2a10f62 	vqrdmlsh.s32	d0, d1, d2\[1\]
+  78:	f3a20f42 	vqrdmlsh.s32	q0, q1, d2\[0\]
+  7c:	f3a20f62 	vqrdmlsh.s32	q0, q1, d2\[1\]
+
+00000080 <.*>:
+  80:	ff11 0b12 	vqrdmlah.s16	d0, d1, d2
+  84:	ff12 0b54 	vqrdmlah.s16	q0, q1, q2
+  88:	ff21 0b12 	vqrdmlah.s32	d0, d1, d2
+  8c:	ff22 0b54 	vqrdmlah.s32	q0, q1, q2
+  90:	ff11 0c12 	vqrdmlsh.s16	d0, d1, d2
+  94:	ff12 0c54 	vqrdmlsh.s16	q0, q1, q2
+  98:	ff21 0c12 	vqrdmlsh.s32	d0, d1, d2
+  9c:	ff22 0c54 	vqrdmlsh.s32	q0, q1, q2
+  a0:	ef91 0e42 	vqrdmlah.s16	d0, d1, d2\[0\]
+  a4:	ef91 0e4a 	vqrdmlah.s16	d0, d1, d2\[1\]
+  a8:	ef91 0e62 	vqrdmlah.s16	d0, d1, d2\[2\]
+  ac:	ef91 0e6a 	vqrdmlah.s16	d0, d1, d2\[3\]
+  b0:	ff92 0e42 	vqrdmlah.s16	q0, q1, d2\[0\]
+  b4:	ff92 0e4a 	vqrdmlah.s16	q0, q1, d2\[1\]
+  b8:	ff92 0e62 	vqrdmlah.s16	q0, q1, d2\[2\]
+  bc:	ff92 0e6a 	vqrdmlah.s16	q0, q1, d2\[3\]
+  c0:	efa1 0e42 	vqrdmlah.s32	d0, d1, d2\[0\]
+  c4:	efa1 0e62 	vqrdmlah.s32	d0, d1, d2\[1\]
+  c8:	ffa2 0e42 	vqrdmlah.s32	q0, q1, d2\[0\]
+  cc:	ffa2 0e62 	vqrdmlah.s32	q0, q1, d2\[1\]
+  d0:	ef91 0f42 	vqrdmlsh.s16	d0, d1, d2\[0\]
+  d4:	ef91 0f4a 	vqrdmlsh.s16	d0, d1, d2\[1\]
+  d8:	ef91 0f62 	vqrdmlsh.s16	d0, d1, d2\[2\]
+  dc:	ef91 0f6a 	vqrdmlsh.s16	d0, d1, d2\[3\]
+  e0:	ff92 0f42 	vqrdmlsh.s16	q0, q1, d2\[0\]
+  e4:	ff92 0f4a 	vqrdmlsh.s16	q0, q1, d2\[1\]
+  e8:	ff92 0f62 	vqrdmlsh.s16	q0, q1, d2\[2\]
+  ec:	ff92 0f6a 	vqrdmlsh.s16	q0, q1, d2\[3\]
+  f0:	efa1 0f42 	vqrdmlsh.s32	d0, d1, d2\[0\]
+  f4:	efa1 0f62 	vqrdmlsh.s32	d0, d1, d2\[1\]
+  f8:	ffa2 0f42 	vqrdmlsh.s32	q0, q1, d2\[0\]
+  fc:	ffa2 0f62 	vqrdmlsh.s32	q0, q1, d2\[1\]
+

include/ChangeLog

@@ -1,3 +1,8 @@
+2016-06-30  Matthew Wahab  <matthew.wahab@arm.com>
+
+	* opcode/arm.h (ARM_ARCH_V8_2a): Add FPU_NEON_EXT_RDMA to the set
+	of enabled FPU features.
+
 2016-06-29  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>
 
 	* opcode/sparc.h (enum sparc_opcode_arch_val): Move

include/opcode/arm.h

@@ -266,7 +266,7 @@
 #define ARM_ARCH_V8_1A	ARM_FEATURE (ARM_AEXT_V8A, ARM_AEXT2_V8_1A,	\
 				     CRC_EXT_ARMV8 | FPU_NEON_EXT_RDMA)
 #define ARM_ARCH_V8_2A	ARM_FEATURE (ARM_AEXT_V8A, ARM_AEXT2_V8_2A,	\
-				     CRC_EXT_ARMV8)
+				     CRC_EXT_ARMV8 | FPU_NEON_EXT_RDMA)
 #define ARM_ARCH_V8M_BASE ARM_FEATURE_CORE (ARM_AEXT_V8M_BASE, ARM_AEXT2_V8M)
 #define ARM_ARCH_V8M_MAIN ARM_FEATURE_CORE (ARM_AEXT_V8M_MAIN, \
 					    ARM_AEXT2_V8M_MAIN)