[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.

1 files changed, 40 insertions, 0 deletions

diff --git a/opcodes/aarch64-opc.c b/opcodes/aarch64-opc.c
index b11bc33..b047d2f 100644
--- a/opcodes/aarch64-opc.c
+++ b/opcodes/aarch64-opc.c
@@ -4481,15 +4481,33 @@ const aarch64_sys_ins_reg aarch64_sys_regs_ic[] =
 const aarch64_sys_ins_reg aarch64_sys_regs_dc[] =
 {
     { "zva",	    CPENS (3, C7, C4, 1),  F_HASXT },
+    { "gva",	    CPENS (3, C7, C4, 3),  F_HASXT | F_ARCHEXT },
+    { "gzva",	    CPENS (3, C7, C4, 4),  F_HASXT | F_ARCHEXT },
     { "ivac",       CPENS (0, C7, C6, 1),  F_HASXT },
+    { "igvac",      CPENS (0, C7, C6, 3),  F_HASXT | F_ARCHEXT },
+    { "igsw",       CPENS (0, C7, C6, 4),  F_HASXT | F_ARCHEXT },
     { "isw",	    CPENS (0, C7, C6, 2),  F_HASXT },
+    { "igdvac",	    CPENS (0, C7, C6, 5),  F_HASXT | F_ARCHEXT },
+    { "igdsw",	    CPENS (0, C7, C6, 6),  F_HASXT | F_ARCHEXT },
     { "cvac",       CPENS (3, C7, C10, 1), F_HASXT },
+    { "cgvac",      CPENS (3, C7, C10, 3), F_HASXT | F_ARCHEXT },
+    { "cgdvac",     CPENS (3, C7, C10, 5), F_HASXT | F_ARCHEXT },
     { "csw",	    CPENS (0, C7, C10, 2), F_HASXT },
+    { "cgsw",       CPENS (0, C7, C10, 4), F_HASXT | F_ARCHEXT },
+    { "cgdsw",	    CPENS (0, C7, C10, 6), F_HASXT | F_ARCHEXT },
     { "cvau",       CPENS (3, C7, C11, 1), F_HASXT },
     { "cvap",       CPENS (3, C7, C12, 1), F_HASXT | F_ARCHEXT },
+    { "cgvap",      CPENS (3, C7, C12, 3), F_HASXT | F_ARCHEXT },
+    { "cgdvap",     CPENS (3, C7, C12, 5), F_HASXT | F_ARCHEXT },
     { "cvadp",      CPENS (3, C7, C13, 1), F_HASXT | F_ARCHEXT },
+    { "cgvadp",     CPENS (3, C7, C13, 3), F_HASXT | F_ARCHEXT },
+    { "cgdvadp",    CPENS (3, C7, C13, 5), F_HASXT | F_ARCHEXT },
     { "civac",      CPENS (3, C7, C14, 1), F_HASXT },
+    { "cigvac",     CPENS (3, C7, C14, 3), F_HASXT | F_ARCHEXT },
+    { "cigdvac",    CPENS (3, C7, C14, 5), F_HASXT | F_ARCHEXT },
     { "cisw",       CPENS (0, C7, C14, 2), F_HASXT },
+    { "cigsw",      CPENS (0, C7, C14, 4), F_HASXT | F_ARCHEXT },
+    { "cigdsw",     CPENS (0, C7, C14, 6), F_HASXT | F_ARCHEXT },
     { 0,       CPENS(0,0,0,0), 0 }
 };
 
@@ -4632,6 +4650,28 @@ aarch64_sys_ins_reg_supported_p (const aarch64_feature_set features,
       && !AARCH64_CPU_HAS_FEATURE (features, AARCH64_FEATURE_CVADP))
     return FALSE;
 
+  /* DC <dc_op> for ARMv8.5-A Memory Tagging Extension.  */
+  if ((reg->value == CPENS (0, C7, C6, 3)
+       || reg->value == CPENS (0, C7, C6, 4)
+       || reg->value == CPENS (0, C7, C10, 4)
+       || reg->value == CPENS (0, C7, C14, 4)
+       || reg->value == CPENS (3, C7, C10, 3)
+       || reg->value == CPENS (3, C7, C12, 3)
+       || reg->value == CPENS (3, C7, C13, 3)
+       || reg->value == CPENS (3, C7, C14, 3)
+       || reg->value == CPENS (3, C7, C4, 3)
+       || reg->value == CPENS (0, C7, C6, 5)
+       || reg->value == CPENS (0, C7, C6, 6)
+       || reg->value == CPENS (0, C7, C10, 6)
+       || reg->value == CPENS (0, C7, C14, 6)
+       || reg->value == CPENS (3, C7, C10, 5)
+       || reg->value == CPENS (3, C7, C12, 5)
+       || reg->value == CPENS (3, C7, C13, 5)
+       || reg->value == CPENS (3, C7, C14, 5)
+       || reg->value == CPENS (3, C7, C4, 4))
+      && !AARCH64_CPU_HAS_FEATURE (features, AARCH64_FEATURE_MEMTAG))
+    return FALSE;
+
   /* AT S1E1RP, AT S1E1WP.  Values are from aarch64_sys_regs_at.  */
   if ((reg->value == CPENS (0, C7, C9, 0)
        || reg->value == CPENS (0, C7, C9, 1))