[PATCH][ARM][GAS]: Assembler support to interpret MVE VMOV instruction correctly.

This patch make changes to the assembler to encode MVE VMOV instruction "a" same as "b".
a: VMOV<c><q> <Dd>, <Dm>
b: VMOV<c><q>.F64 <Dd>, <Dm>

gas/ChangeLog:

2019-08-30  Srinath Parvathaneni  <srinath.parvathaneni@arm.com>

	* config/tc-arm.c (do_neon_mov): Modify "if" statement.
	* testsuite/gas/arm/mve-vmov-bad-3.d: New test.
	* testsuite/gas/arm/mve-vmov-bad-3.l: Likewise.
	* testsuite/gas/arm/mve-vmov-bad-3.s: Likewise.

3 files changed, 86 insertions, 1 deletions

diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c
index 9a367ca..9273bb5 100644
--- a/gas/config/tc-arm.c
+++ b/gas/config/tc-arm.c
@@ -19859,7 +19859,13 @@ do_neon_mov (void)
       et = neon_check_type (2, rs, N_EQK, N_F64 | N_KEY);
       /* It is not an error here if no type is given.  */
       inst.error = NULL;
-      if (et.type == NT_float && et.size == 64)
+
+      /* In MVE we interpret the following instructions as same, so ignoring
+	 the following type (float) and size (64) checks.
+	 a: VMOV<c><q> <Dd>, <Dm>
+	 b: VMOV<c><q>.F64 <Dd>, <Dm>.  */
+      if ((et.type == NT_float && et.size == 64)
+	  || (ARM_CPU_HAS_FEATURE (cpu_variant, mve_ext)))
 	{
 	  do_vfp_nsyn_opcode ("fcpyd");
 	  break;
diff --git a/gas/testsuite/gas/arm/mve-vmov-1.d b/gas/testsuite/gas/arm/mve-vmov-1.d
index 504b3e7..de8dabe 100644
--- a/gas/testsuite/gas/arm/mve-vmov-1.d
+++ b/gas/testsuite/gas/arm/mve-vmov-1.d
@@ -4179,3 +4179,75 @@ Disassembly of section .text:
 [^>]*> ef24 e154 	vmov	q7, q2
 [^>]*> ef28 e158 	vmov	q7, q4
 [^>]*> ef2e e15e 	vmov	q7, q7
+[^>]*> eeb0 0b40 	vmov.f64	d0, d0
+[^>]*> eeb0 0b40 	vmov.f64	d0, d0
+[^>]*> eeb0 0b41 	vmov.f64	d0, d1
+[^>]*> eeb0 0b41 	vmov.f64	d0, d1
+[^>]*> eeb0 0b42 	vmov.f64	d0, d2
+[^>]*> eeb0 0b42 	vmov.f64	d0, d2
+[^>]*> eeb0 0b44 	vmov.f64	d0, d4
+[^>]*> eeb0 0b44 	vmov.f64	d0, d4
+[^>]*> eeb0 0b48 	vmov.f64	d0, d8
+[^>]*> eeb0 0b48 	vmov.f64	d0, d8
+[^>]*> eeb0 0b4f 	vmov.f64	d0, d15
+[^>]*> eeb0 0b4f 	vmov.f64	d0, d15
+[^>]*> eeb0 1b40 	vmov.f64	d1, d0
+[^>]*> eeb0 1b40 	vmov.f64	d1, d0
+[^>]*> eeb0 1b41 	vmov.f64	d1, d1
+[^>]*> eeb0 1b41 	vmov.f64	d1, d1
+[^>]*> eeb0 1b42 	vmov.f64	d1, d2
+[^>]*> eeb0 1b42 	vmov.f64	d1, d2
+[^>]*> eeb0 1b44 	vmov.f64	d1, d4
+[^>]*> eeb0 1b44 	vmov.f64	d1, d4
+[^>]*> eeb0 1b48 	vmov.f64	d1, d8
+[^>]*> eeb0 1b48 	vmov.f64	d1, d8
+[^>]*> eeb0 1b4f 	vmov.f64	d1, d15
+[^>]*> eeb0 1b4f 	vmov.f64	d1, d15
+[^>]*> eeb0 2b40 	vmov.f64	d2, d0
+[^>]*> eeb0 2b40 	vmov.f64	d2, d0
+[^>]*> eeb0 2b41 	vmov.f64	d2, d1
+[^>]*> eeb0 2b41 	vmov.f64	d2, d1
+[^>]*> eeb0 2b42 	vmov.f64	d2, d2
+[^>]*> eeb0 2b42 	vmov.f64	d2, d2
+[^>]*> eeb0 2b44 	vmov.f64	d2, d4
+[^>]*> eeb0 2b44 	vmov.f64	d2, d4
+[^>]*> eeb0 2b48 	vmov.f64	d2, d8
+[^>]*> eeb0 2b48 	vmov.f64	d2, d8
+[^>]*> eeb0 2b4f 	vmov.f64	d2, d15
+[^>]*> eeb0 2b4f 	vmov.f64	d2, d15
+[^>]*> eeb0 4b40 	vmov.f64	d4, d0
+[^>]*> eeb0 4b40 	vmov.f64	d4, d0
+[^>]*> eeb0 4b41 	vmov.f64	d4, d1
+[^>]*> eeb0 4b41 	vmov.f64	d4, d1
+[^>]*> eeb0 4b42 	vmov.f64	d4, d2
+[^>]*> eeb0 4b42 	vmov.f64	d4, d2
+[^>]*> eeb0 4b44 	vmov.f64	d4, d4
+[^>]*> eeb0 4b44 	vmov.f64	d4, d4
+[^>]*> eeb0 4b48 	vmov.f64	d4, d8
+[^>]*> eeb0 4b48 	vmov.f64	d4, d8
+[^>]*> eeb0 4b4f 	vmov.f64	d4, d15
+[^>]*> eeb0 4b4f 	vmov.f64	d4, d15
+[^>]*> eeb0 8b40 	vmov.f64	d8, d0
+[^>]*> eeb0 8b40 	vmov.f64	d8, d0
+[^>]*> eeb0 8b41 	vmov.f64	d8, d1
+[^>]*> eeb0 8b41 	vmov.f64	d8, d1
+[^>]*> eeb0 8b42 	vmov.f64	d8, d2
+[^>]*> eeb0 8b42 	vmov.f64	d8, d2
+[^>]*> eeb0 8b44 	vmov.f64	d8, d4
+[^>]*> eeb0 8b44 	vmov.f64	d8, d4
+[^>]*> eeb0 8b48 	vmov.f64	d8, d8
+[^>]*> eeb0 8b48 	vmov.f64	d8, d8
+[^>]*> eeb0 8b4f 	vmov.f64	d8, d15
+[^>]*> eeb0 8b4f 	vmov.f64	d8, d15
+[^>]*> eeb0 fb40 	vmov.f64	d15, d0
+[^>]*> eeb0 fb40 	vmov.f64	d15, d0
+[^>]*> eeb0 fb41 	vmov.f64	d15, d1
+[^>]*> eeb0 fb41 	vmov.f64	d15, d1
+[^>]*> eeb0 fb42 	vmov.f64	d15, d2
+[^>]*> eeb0 fb42 	vmov.f64	d15, d2
+[^>]*> eeb0 fb44 	vmov.f64	d15, d4
+[^>]*> eeb0 fb44 	vmov.f64	d15, d4
+[^>]*> eeb0 fb48 	vmov.f64	d15, d8
+[^>]*> eeb0 fb48 	vmov.f64	d15, d8
+[^>]*> eeb0 fb4f 	vmov.f64	d15, d15
+[^>]*> eeb0 fb4f 	vmov.f64	d15, d15
diff --git a/gas/testsuite/gas/arm/mve-vmov-1.s b/gas/testsuite/gas/arm/mve-vmov-1.s
index d24fae6..57ca47d 100644
--- a/gas/testsuite/gas/arm/mve-vmov-1.s
+++ b/gas/testsuite/gas/arm/mve-vmov-1.s
@@ -136,3 +136,10 @@ vmov.i64 q0, #255 @ 0x000000000000000FF
 vmov \op1, \op2
 .endr
 .endr
+
+.irp op1, d0, d1, d2, d4, d8, d15
+.irp op2, d0, d1, d2, d4, d8, d15
+vmov \op1, \op2
+vmov.f64 \op1, \op2
+.endr
+.endr