[binutils][arm] Implement Custom Datapath Extensions for MVE

Here we implement the custom datapath extensions for MVE.

This required the following changes:

- Adding a new register argument type (that takes either an MVE vector or
  a Neon S or D register).
- Adding two new immediate operands types (0-127 and 0-4095).
- Using the Neon type machinery to distinguish between instruction
  types.  This required the introduction of new neon shapes to account
  for the coprocessor operands to these instructions.
- Adding a new disassembly character to `print_insn_cde` to handle the
  new register types.

Specification can be found at
https://developer.arm.com/docs/ddi0607/latest

Successfully regression tested on arm-none-eabi, and arm-wince-pe.

gas/ChangeLog:

2020-02-10  Matthew Malcomson  <matthew.malcomson@arm.com>

	* config/tc-arm.c (NEON_MAX_TYPE_ELS): Increment to account for
	instructions that can have 5 arguments.
	(enum operand_parse_code): Add new operands.
	(parse_operands): Account for new operands.
	(S5): New macro.
	(enum neon_shape_el): Introduce P suffixes for coprocessor.
	(neon_select_shape): Account for P suffix.
	(LOW1): Move macro to global position.
	(HI4): Move macro to global position.
	(vcx_assign_vec_d): New.
	(vcx_assign_vec_m): New.
	(vcx_assign_vec_n): New.
	(enum vcx_reg_type): New.
	(vcx_get_reg_type): New.
	(vcx_size_pos): New.
	(vcx_vec_pos): New.
	(vcx_handle_shape): New.
	(vcx_ensure_register_in_range): New.
	(vcx_handle_register_arguments): New.
	(vcx_handle_insn_block): New.
	(vcx_handle_common_checks): New.
	(do_vcx1): New.
	(do_vcx2): New.
	(do_vcx3): New.
	* testsuite/gas/arm/cde-missing-fp.d: New test.
	* testsuite/gas/arm/cde-missing-fp.l: New test.
	* testsuite/gas/arm/cde-missing-mve.d: New test.
	* testsuite/gas/arm/cde-missing-mve.l: New test.
	* testsuite/gas/arm/cde-mve-or-neon.d: New test.
	* testsuite/gas/arm/cde-mve-or-neon.s: New test.
	* testsuite/gas/arm/cde-mve.s: New test.
	* testsuite/gas/arm/cde-warnings.l:
	* testsuite/gas/arm/cde-warnings.s:
	* testsuite/gas/arm/cde.d:
	* testsuite/gas/arm/cde.s:

opcodes/ChangeLog:

2020-02-10  Matthew Malcomson  <matthew.malcomson@arm.com>

	* arm-dis.c (print_insn_cde): Define 'V' parse character.
	(cde_opcodes): Add VCX* instructions.

2 files changed, 45 insertions, 0 deletions

diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index fb4f262..7ab3a81 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,8 @@
+2020-02-10  Matthew Malcomson  <matthew.malcomson@arm.com>
+
+	* arm-dis.c (print_insn_cde): Define 'V' parse character.
+	(cde_opcodes): Add VCX* instructions.
+
 2020-02-10  Stam Markianos-Wright  <stam.markianos-wright@arm.com>
 	    Matthew Malcomson  <matthew.malcomson@arm.com>
 
diff --git a/opcodes/arm-dis.c b/opcodes/arm-dis.c
index 2a29887..b926b65 100644
--- a/opcodes/arm-dis.c
+++ b/opcodes/arm-dis.c
@@ -514,6 +514,27 @@ static const struct cdeopcode32 cde_opcodes[] =
 	      0xee800040, 0xef800840,
 	     "cx3d%a\t%p, %0-3S, %0-3T, %16-19n, %12-15n, #%4-5,7,20-22d"),
 
+  CDE_OPCODE (ARM_FEATURE_CORE_HIGH (ARM_EXT2_CDE),
+	      0xec200000, 0xeeb00840,
+	      "vcx1%a\t%p, %12-15,22V, #%0-5,7,16-19d"),
+  CDE_OPCODE (ARM_FEATURE_CORE_HIGH (ARM_EXT2_CDE),
+	      0xec200040, 0xeeb00840,
+	      "vcx1%a\t%p, %12-15,22V, #%0-5,7,16-19,24d"),
+
+  CDE_OPCODE (ARM_FEATURE_CORE_HIGH (ARM_EXT2_CDE),
+	      0xec300000, 0xeeb00840,
+	      "vcx2%a\t%p, %12-15,22V, %0-3,5V, #%4,7,16-19d"),
+  CDE_OPCODE (ARM_FEATURE_CORE_HIGH (ARM_EXT2_CDE),
+	      0xec300040, 0xeeb00840,
+	      "vcx2%a\t%p, %12-15,22V, %0-3,5V, #%4,7,16-19,24d"),
+
+  CDE_OPCODE (ARM_FEATURE_CORE_HIGH (ARM_EXT2_CDE),
+	      0xec800000, 0xee800840,
+	      "vcx3%a\t%p, %12-15,22V, %16-19,7V, %0-3,5V, #%4,20-21d"),
+  CDE_OPCODE (ARM_FEATURE_CORE_HIGH (ARM_EXT2_CDE),
+	      0xec800040, 0xee800840,
+	      "vcx3%a\t%p, %12-15,22V, %16-19,7V, %0-3,5V, #%4,20-21,24d"),
+
   CDE_OPCODE (ARM_FEATURE_CORE_LOW (0), 0, 0, 0)
 
 };
@@ -8920,6 +8941,25 @@ print_insn_cde (struct disassemble_info *info, long given, bfd_boolean thumb)
 		    func (stream, "%ld", value);
 		    break;
 
+		  case 'V':
+		    if (given & (1 << 6))
+		      func (stream, "q%ld", value >> 1);
+		    else if (given & (1 << 24))
+		      func (stream, "d%ld", value);
+		    else
+		      {
+			/* Encoding for S register is different than for D and
+			   Q registers.  S registers are encoded using the top
+			   single bit in position 22 as the lowest bit of the
+			   register number, while for Q and D it represents the
+			   highest bit of the register number.  */
+			uint8_t top_bit = (value >> 4) & 1;
+			uint8_t tmp = (value << 1) & 0x1e;
+			uint8_t res = tmp | top_bit;
+			func (stream, "s%u", res);
+		      }
+		    break;
+
 		default:
 		  abort ();
 		}