[binutils-gdb] [binutils][aarch64] New sve_size_tsz_bhs iclass.

[Matthew Malcomson]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=fd1dc4a0c1b87c1efa7e0398fd47fd1e87fa0fb4

commit fd1dc4a0c1b87c1efa7e0398fd47fd1e87fa0fb4
Author: Matthew Malcomson <matthew.malcomson@arm.com>
Date:   Thu May 9 10:29:26 2019 +0100

    [binutils][aarch64] New sve_size_tsz_bhs iclass.
    
    Add sve_size_tsz_bhs iclass needed for sqxtnb and similar instructions.
    This iclass encodes one of three variants by the most significant bit
    set in a 3-bit value where only one bit may be set.
    
    include/ChangeLog:
    
    2019-05-09  Matthew Malcomson  <matthew.malcomson@arm.com>
    
    	* opcode/aarch64.h (enum aarch64_insn_class): Add sve_size_tsz_bhs
    	iclass.
    
    opcodes/ChangeLog:
    
    2019-05-09  Matthew Malcomson  <matthew.malcomson@arm.com>
    
    	* aarch64-asm.c (aarch64_encode_variant_using_iclass): Handle
    	sve_size_tsz_bhs iclass encode.
    	* aarch64-dis.c (aarch64_decode_variant_using_iclass): Handle
    	sve_size_tsz_bhs iclass decode.

Diff:
---
 include/ChangeLog        |  5 +++++
 include/opcode/aarch64.h |  1 +
 opcodes/ChangeLog        |  7 +++++++
 opcodes/aarch64-asm.c    |  6 ++++++
 opcodes/aarch64-dis.c    | 11 +++++++++++
 5 files changed, 30 insertions(+)

diff --git a/include/ChangeLog b/include/ChangeLog
index f9650c8..8a990f3 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,5 +1,10 @@
 2019-05-09  Matthew Malcomson  <matthew.malcomson@arm.com>
 
+	* opcode/aarch64.h (enum aarch64_insn_class): Add sve_size_tsz_bhs
+	iclass.
+
+2019-05-09  Matthew Malcomson  <matthew.malcomson@arm.com>
+
 	* opcode/aarch64.h (enum aarch64_opnd): New SVE_Zm4_11_INDEX operand.
 
 2019-05-09  Matthew Malcomson  <matthew.malcomson@arm.com>
diff --git a/include/opcode/aarch64.h b/include/opcode/aarch64.h
index 25201cf..e354e65 100644
--- a/include/opcode/aarch64.h
+++ b/include/opcode/aarch64.h
@@ -601,6 +601,7 @@ enum aarch64_insn_class
   sve_size_013,
   sve_shift_tsz_hsd,
   sve_shift_tsz_bhsd,
+  sve_size_tsz_bhs,
   testbranch,
   cryptosm3,
   cryptosm4,
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index b020582..bb823cd 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,5 +1,12 @@
 2019-05-09  Matthew Malcomson  <matthew.malcomson@arm.com>
 
+	* aarch64-asm.c (aarch64_encode_variant_using_iclass): Handle
+	sve_size_tsz_bhs iclass encode.
+	* aarch64-dis.c (aarch64_decode_variant_using_iclass): Handle
+	sve_size_tsz_bhs iclass decode.
+
+2019-05-09  Matthew Malcomson  <matthew.malcomson@arm.com>
+
 	* aarch64-asm-2.c: Regenerated.
 	* aarch64-dis-2.c: Regenerated.
 	* aarch64-opc-2.c: Regenerated.
diff --git a/opcodes/aarch64-asm.c b/opcodes/aarch64-asm.c
index ad50598..afb0e5b 100644
--- a/opcodes/aarch64-asm.c
+++ b/opcodes/aarch64-asm.c
@@ -1673,6 +1673,12 @@ aarch64_encode_variant_using_iclass (struct aarch64_inst *inst)
 		    aarch64_get_variant (inst) + 1, 0);
       break;
 
+    case sve_size_tsz_bhs:
+      insert_fields (&inst->value,
+		     (1 << aarch64_get_variant (inst)),
+		     0, 2, FLD_SVE_tszl_19, FLD_SVE_sz);
+      break;
+
     case sve_size_013:
       variant = aarch64_get_variant (inst);
       if (variant == 2)
diff --git a/opcodes/aarch64-dis.c b/opcodes/aarch64-dis.c
index b42e4d5..6b53a2c 100644
--- a/opcodes/aarch64-dis.c
+++ b/opcodes/aarch64-dis.c
@@ -2843,6 +2843,17 @@ aarch64_decode_variant_using_iclass (aarch64_inst *inst)
 	}
       break;
 
+    case sve_size_tsz_bhs:
+      i = extract_fields (inst->value, 0, 2, FLD_SVE_sz, FLD_SVE_tszl_19);
+      while (i != 1)
+	{
+	  if (i & 1)
+	    return FALSE;
+	  i >>= 1;
+	  variant += 1;
+	}
+      break;
+
     case sve_shift_tsz_hsd:
       i = extract_fields (inst->value, 0, 2, FLD_SVE_sz, FLD_SVE_tszl_19);
       if (i == 0)