aarch64: Add support for FEAT_SME2p1 instructions.

Hi,

This patch add support for FEAT_SME2p1 and "movaz" instructions
along with the optional flag +sme2p1.

Following "movaz" instructions are add:
Move and zero two ZA tile slices to vector registers.
Move and zero four ZA tile slices to vector registers.

Regression testing for aarch64-none-elf target and found no regressions.

Ok for binutils-master?

Regards,
Srinath.

2 files changed, 81 insertions, 0 deletions

diff --git a/gas/testsuite/gas/aarch64/sme2p1-1.d b/gas/testsuite/gas/aarch64/sme2p1-1.d
new file mode 100644
index 0000000..a6e7b76
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/sme2p1-1.d
@@ -0,0 +1,42 @@
+#name: Test of SME2.1 movaz instructions.
+#as: -march=armv9.4-a+sme2p1
+#objdump: -dr
+
+[^:]+:     file format .*
+
+
+[^:]+:
+
+[^:]+:
+.*:	c006c260 	movaz	{z0.b-z1.b}, za0v.b \[w14, 6:7\]
+.*:	c046c260 	movaz	{z0.h-z1.h}, za0v.h \[w14, 6:7\]
+.*:	c086c220 	movaz	{z0.s-z1.s}, za0v.s \[w14, 2:3\]
+.*:	c0c6c200 	movaz	{z0.d-z1.d}, za0v.d \[w14, 0:1\]
+.*:	c00602e0 	movaz	{z0.b-z1.b}, za0h.b \[w12, 14:15\]
+.*:	c0462260 	movaz	{z0.h-z1.h}, za0h.h \[w13, 6:7\]
+.*:	c0864220 	movaz	{z0.s-z1.s}, za0h.s \[w14, 2:3\]
+.*:	c0c66200 	movaz	{z0.d-z1.d}, za0h.d \[w15, 0:1\]
+.*:	c006c260 	movaz	{z0.b-z1.b}, za0v.b \[w14, 6:7\]
+.*:	c046c2e0 	movaz	{z0.h-z1.h}, za1v.h \[w14, 6:7\]
+.*:	c086c2a0 	movaz	{z0.s-z1.s}, za2v.s \[w14, 2:3\]
+.*:	c0c6c260 	movaz	{z0.d-z1.d}, za3v.d \[w14, 0:1\]
+.*:	c00602e0 	movaz	{z0.b-z1.b}, za0h.b \[w12, 14:15\]
+.*:	c04622e0 	movaz	{z0.h-z1.h}, za1h.h \[w13, 6:7\]
+.*:	c08642a0 	movaz	{z0.s-z1.s}, za2h.s \[w14, 2:3\]
+.*:	c0c66260 	movaz	{z0.d-z1.d}, za3h.d \[w15, 0:1\]
+.*:	c006c660 	movaz	{z0.b-z3.b}, za0v.b \[w14, 12:15\]
+.*:	c046c620 	movaz	{z0.h-z3.h}, za0v.h \[w14, 4:7\]
+.*:	c086c600 	movaz	{z0.s-z3.s}, za0v.s \[w14, 0:3\]
+.*:	c0c6c600 	movaz	{z0.d-z3.d}, za0v.d \[w14, 0:3\]
+.*:	c0060660 	movaz	{z0.b-z3.b}, za0h.b \[w12, 12:15\]
+.*:	c0462620 	movaz	{z0.h-z3.h}, za0h.h \[w13, 4:7\]
+.*:	c0864600 	movaz	{z0.s-z3.s}, za0h.s \[w14, 0:3\]
+.*:	c0c66600 	movaz	{z0.d-z3.d}, za0h.d \[w15, 0:3\]
+.*:	c006c640 	movaz	{z0.b-z3.b}, za0v.b \[w14, 8:11\]
+.*:	c046c660 	movaz	{z0.h-z3.h}, za1v.h \[w14, 4:7\]
+.*:	c086c640 	movaz	{z0.s-z3.s}, za2v.s \[w14, 0:3\]
+.*:	c0c6c660 	movaz	{z0.d-z3.d}, za3v.d \[w14, 0:3\]
+.*:	c0060660 	movaz	{z0.b-z3.b}, za0h.b \[w12, 12:15\]
+.*:	c0462660 	movaz	{z0.h-z3.h}, za1h.h \[w13, 4:7\]
+.*:	c0864640 	movaz	{z0.s-z3.s}, za2h.s \[w14, 0:3\]
+.*:	c0c66660 	movaz	{z0.d-z3.d}, za3h.d \[w15, 0:3\]
diff --git a/gas/testsuite/gas/aarch64/sme2p1-1.s b/gas/testsuite/gas/aarch64/sme2p1-1.s
new file mode 100644
index 0000000..77481d4
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/sme2p1-1.s
@@ -0,0 +1,39 @@
+	movaz {z0.b - z1.b}, ZA0V.B [w14, 6:7]
+	movaz {z0.h - z1.h}, ZA0V.H [w14, 6:7]
+	movaz {z0.s - z1.s}, ZA0V.S [w14, 2:3]
+	movaz {z0.d - z1.d}, ZA0V.D [w14, 0:1]
+
+	movaz {z0.b - z1.b}, ZA0H.B [w12, 14:15]
+	movaz {z0.h - z1.h}, ZA0H.H [w13, 6:7]
+	movaz {z0.s - z1.s}, ZA0H.S [w14, 2:3]
+	movaz {z0.d - z1.d}, ZA0H.D [w15, 0:1]
+
+	movaz {z0.b - z1.b}, ZA0V.B [w14, 6:7]
+	movaz {z0.h - z1.h}, ZA1V.H [w14, 6:7]
+	movaz {z0.s - z1.s}, ZA2V.S [w14, 2:3]
+	movaz {z0.d - z1.d}, ZA3V.D [w14, 0:1]
+
+	movaz {z0.b - z1.b}, ZA0H.B [w12, 14:15]
+	movaz {z0.h - z1.h}, ZA1H.H [w13, 6:7]
+	movaz {z0.s - z1.s}, ZA2H.S [w14, 2:3]
+	movaz {z0.d - z1.d}, ZA3H.D [w15, 0:1]
+
+	movaz {z0.b - z3.b}, ZA0V.B [w14, 12:15]
+	movaz {z0.h - z3.h}, ZA0V.H [w14, 4:7]
+	movaz {z0.s - z3.s}, ZA0V.S [w14, 0:3]
+	movaz {z0.d - z3.d}, ZA0V.D [w14, 0:3]
+
+	movaz {z0.b - z3.b}, ZA0H.B [w12, 12:15]
+	movaz {z0.h - z3.h}, ZA0H.H [w13, 4:7]
+	movaz {z0.s - z3.s}, ZA0H.S [w14, 0:3]
+	movaz {z0.d - z3.d}, ZA0H.D [w15, 0:3]
+
+	movaz {z0.b - z3.b}, ZA0V.B [w14, 8:11]
+	movaz {z0.h - z3.h}, ZA1V.H [w14, 4:7]
+	movaz {z0.s - z3.s}, ZA2V.S [w14, 0:3]
+	movaz {z0.d - z3.d}, ZA3V.D [w14, 0:3]
+
+	movaz {z0.b - z3.b}, ZA0H.B [w12, 12:15]
+	movaz {z0.h - z3.h}, ZA1H.H [w13, 4:7]
+	movaz {z0.s - z3.s}, ZA2H.S [w14, 0:3]
+	movaz {z0.d - z3.d}, ZA3H.D [w15, 0:3]