[BINUTILS, AARCH64, 8/8] Add data cache instructions for Memory Tagging Extension

This patch is part of the patch series to add support for ARMv8.5-A
Memory Tagging Extensions which is an optional extension to
ARMv8.5-A and is enabled using the +memtag command line option.

This patch adds all the data cache instructions that are part of this
extension:
- DC IGVAC, Xt
- DC IGSW, Xt
- DC CGSW, Xt
- DC CIGSW, Xt
- DC CGVAC, Xt
- DC CGVAP, Xt
- DC CGVADP, Xt
- DC CIGVAC, Xt
- DC GVA, Xt
- DC IGDVAC, Xt
- DC IGDSW, Xt
- DC CGDSW, Xt
- DC CIGDSW, Xt
- DC CGDVAC, Xt
- DC CGDVAP, Xt
- DC CGDVADP, Xt
- DC CIGDVAC, Xt
- DC GZVA, Xt

*** opcodes/ChangeLog ***

2018-11-12  Sudakshina Das  <sudi.das@arm.com>

	* aarch64-opc.c (aarch64_sys_regs_dc): New entries for
	IGVAC, IGSW, CGSW, CIGSW, CGVAC, CGVAP, CGVADP, CIGVAC, GVA,
	IGDVAC, IGDSW, CGDSW, CIGDSW, CGDVAC, CGDVAP, CGDVADP,
	CIGDVAC and GZVA.
	(aarch64_sys_ins_reg_supported_p): New check for above.

*** gas/ChangeLog ***

2018-11-12  Sudakshina Das  <sudi.das@arm.com>

	* testsuite/gas/aarch64/sysreg-4.s: Test IGVAC, IGSW,
	CGSW, CIGSW, CGVAC, CGVAP, CGVADP, CIGVAC, GVA,
	IGDVAC, IGDSW, CGDSW, CIGDSW, CGDVAC, CGDVAP, CGDVADP,
	CIGDVAC and GZVA with DC.
	* testsuite/gas/aarch64/sysreg-4.d: Likewise.
	* testsuite/gas/aarch64/illegal-sysreg-4.l: Likewise.

4 files changed, 68 insertions, 0 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 1709a9e..03d44d9 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,5 +1,14 @@
 2018-11-12  Sudakshina Das  <sudi.das@arm.com>
 
+	* testsuite/gas/aarch64/sysreg-4.s: Test IGVAC, IGSW,
+	CGSW, CIGSW, CGVAC, CGVAP, CGVADP, CIGVAC, GVA,
+	IGDVAC, IGDSW, CGDSW, CIGDSW, CGDVAC, CGDVAP, CGDVADP,
+	CIGDVAC and GZVA with DC.
+	* testsuite/gas/aarch64/sysreg-4.d: Likewise.
+	* testsuite/gas/aarch64/illegal-sysreg-4.l: Likewise.
+
+2018-11-12  Sudakshina Das  <sudi.das@arm.com>
+
 	* testsuite/gas/aarch64/sysreg-4.s: Test TCO, TFSRE0_SL1,
 	TFSR_EL1, TFSR_EL2, TFSR_EL3, TFSR_EL12, RGSR_EL1 and
 	GCR_EL1 MSR and MRS.
diff --git a/gas/testsuite/gas/aarch64/illegal-sysreg-4.l b/gas/testsuite/gas/aarch64/illegal-sysreg-4.l
index 36abf4f..d431f9b 100644
--- a/gas/testsuite/gas/aarch64/illegal-sysreg-4.l
+++ b/gas/testsuite/gas/aarch64/illegal-sysreg-4.l
@@ -35,3 +35,21 @@
 [^:]*:[0-9]+: Error: selected processor does not support system register name 'rgsr_el1'
 [^:]*:[0-9]+: Error: selected processor does not support system register name 'gcr_el1'
 [^:]*:[0-9]+: Error: selected processor does not support PSTATE field name 'tco'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'igvac'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'igsw'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'cgsw'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'cigsw'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'cgvac'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'cgvap'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'cgvadp'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'cigvac'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'gva'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'igdvac'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'igdsw'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'cgdsw'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'cigdsw'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'cgdvac'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'cgdvap'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'cgdvadp'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'cigdvac'
+[^:]*:[0-9]+: Error: selected processor does not support system register name 'gzva'
diff --git a/gas/testsuite/gas/aarch64/sysreg-4.d b/gas/testsuite/gas/aarch64/sysreg-4.d
index 0abeed8..ab6e217 100644
--- a/gas/testsuite/gas/aarch64/sysreg-4.d
+++ b/gas/testsuite/gas/aarch64/sysreg-4.d
@@ -38,3 +38,21 @@ Disassembly of section \.text:
 .*:	d51810a1 	msr	rgsr_el1, x1
 .*:	d51810c3 	msr	gcr_el1, x3
 .*:	d503489f 	msr	tco, #0x8
+.*:	d5087661 	dc	igvac, x1
+.*:	d5087682 	dc	igsw, x2
+.*:	d5087a83 	dc	cgsw, x3
+.*:	d5087e84 	dc	cigsw, x4
+.*:	d50b7a65 	dc	cgvac, x5
+.*:	d50b7c66 	dc	cgvap, x6
+.*:	d50b7d67 	dc	cgvadp, x7
+.*:	d50b7e68 	dc	cigvac, x8
+.*:	d50b7469 	dc	gva, x9
+.*:	d50876aa 	dc	igdvac, x10
+.*:	d50876cb 	dc	igdsw, x11
+.*:	d5087acc 	dc	cgdsw, x12
+.*:	d5087ecd 	dc	cigdsw, x13
+.*:	d50b7aae 	dc	cgdvac, x14
+.*:	d50b7caf 	dc	cgdvap, x15
+.*:	d50b7db0 	dc	cgdvadp, x16
+.*:	d50b7eb1 	dc	cigdvac, x17
+.*:	d50b7492 	dc	gzva, x18
diff --git a/gas/testsuite/gas/aarch64/sysreg-4.s b/gas/testsuite/gas/aarch64/sysreg-4.s
index d25e9b9..6c18b4a 100644
--- a/gas/testsuite/gas/aarch64/sysreg-4.s
+++ b/gas/testsuite/gas/aarch64/sysreg-4.s
@@ -38,3 +38,26 @@ func:
 
 	# MSR (immediate)
 	msr TCO, #8
+
+	# Data cache
+	dc igvac, x1
+	dc igsw, x2
+	dc cgsw, x3
+	dc cigsw, x4
+	dc cgvac, x5
+	dc cgvap, x6
+	dc cgvadp, x7
+	dc cigvac, x8
+
+	dc gva, x9
+
+	dc igdvac, x10
+	dc igdsw, x11
+	dc cgdsw, x12
+	dc cigdsw, x13
+	dc cgdvac, x14
+	dc cgdvap, x15
+	dc cgdvadp, x16
+	dc cigdvac, x17
+
+	dc gzva, x18