[AArch64][PATCH 11/14] Add support for the 2H vector type.

ARMv8.2 adds 16-bit floating point operations as an optional extension
to the floating point and Adv.SIMD support. The FP16 additions to the
scalar pairwise group introduce a new vector type, 2H. This patch adds
support for this vector type to binutils.

The patch adds a new operand qualifier to the enum
aarch64.h:aarch64_opnd_qualifier. This interferes with the calculation
used by aarch64-dis.c:get_vreg_qualifier_from_value, called when
decoding an instruction. Since the new vector type is only used in FP16
scalar pairwise instructions which do not require the function, this
patch adjusts the function to ignore the new qualifier.

gas/
2015-12-14  Matthew Wahab  <matthew.wahab@arm.com>

	* config/tc-aarch64.c (parse_neon_type_for_operand): Adjust to
	take into account new vector type 2H.
	(vectype_to_qualifier): Likewise.

include/opcode/
2015-12-14  Matthew Wahab  <matthew.wahab@arm.com>

	* aarch64.h (enum aarch64_opnd_qualifier): Add
	AARCH64_OPND_QLF_V_2H.

opcodes/
2015-12-14  Matthew Wahab  <matthew.wahab@arm.coM>

	* aarch64-dis.c (get_vreg_qualifier_from_value): Update comment
	and adjust calculation to ignore qualifier for type 2H.
	* aarch64-opc.c (aarch64_opnd_qualifier): Add "2H".

Change-Id: Idf9a3694732962c80fde04f08c7304de9164f126

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 17fa42e700e2ad73dc05d2b082345eb9a41a579e..6a7cab6c1252e85692a39bdcacac47c0626d707a 100644 (file)
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,9 @@
+2015-12-14  Matthew Wahab  <matthew.wahab@arm.com>
+
+       * config/tc-aarch64.c (parse_neon_type_for_operand): Adjust to
+       take into account new vector type 2H.
+       (vectype_to_qualifier): Likewise.
+
 2015-12-14  Matthew Wahab  <matthew.wahab@arm.com>
 
        * config/tc-aarch64.c (vectype_to_qualifier): Calculate operand

diff --git a/gas/config/tc-aarch64.c b/gas/config/tc-aarch64.c
index 0e471891724c329e4fe3988abd2007aa3efef207..253f3be3a755cff23e0f45fdfb3f32623897b998 100644 (file)
--- a/gas/config/tc-aarch64.c
+++ b/gas/config/tc-aarch64.c
@@ -744,7 +744,7 @@ aarch64_reg_parse_32_64 (char **ccp, int reject_sp, int reject_rz,
    otherwise return FALSE.
 
    Accept only one occurrence of:
-   8b 16b 4h 8h 2s 4s 1d 2d
+   8b 16b 2h 4h 8h 2s 4s 1d 2d
    b h s d q  */
 static bfd_boolean
 parse_neon_type_for_operand (struct neon_type_el *parsed_type, char **str)
@@ -803,7 +803,8 @@ elt_size:
        first_error (_("missing element size"));
       return FALSE;
     }
-  if (width != 0 && width * element_size != 64 && width * element_size != 128)
+  if (width != 0 && width * element_size != 64 && width * element_size != 128
+      && !(width == 2 && element_size == 16))
     {
       first_error_fmt (_
                       ("invalid element size %d and vector size combination %c"),
@@ -4674,7 +4675,7 @@ vectype_to_qualifier (const struct neon_type_el *vectype)
   const unsigned int ele_base [5] =
     {
       AARCH64_OPND_QLF_V_8B,
-      AARCH64_OPND_QLF_V_4H,
+      AARCH64_OPND_QLF_V_2H,
       AARCH64_OPND_QLF_V_2S,
       AARCH64_OPND_QLF_V_1D,
       AARCH64_OPND_QLF_V_1Q
@@ -4694,7 +4695,7 @@ vectype_to_qualifier (const struct neon_type_el *vectype)
       int reg_size = ele_size[vectype->type] * vectype->width;
       unsigned offset;
       unsigned shift;
-      if (reg_size != 16 && reg_size != 8)
+      if (reg_size != 16 && reg_size != 8 && reg_size != 4)
        goto vectype_conversion_fail;
 
       /* The conversion is by calculating the offset from the base operand
@@ -4704,9 +4705,7 @@ vectype_to_qualifier (const struct neon_type_el *vectype)
       shift = 0;
       if (vectype->type == NT_b)
        shift = 4;
-      else if (vectype->type == NT_h)
-       shift = 3;
-      else if (vectype->type == NT_s)
+      else if (vectype->type == NT_h || vectype->type == NT_s)
        shift = 2;
       else if (vectype->type >= NT_d)
        shift = 1;

diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index f307a2aa769737b4e4fed175f8bcdbe101b43844..e72c1a03def3fdaf19e4ee48abecbcee13cf6c20 100644 (file)
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,3 +1,8 @@
+2015-12-14  Matthew Wahab  <matthew.wahab@arm.com>
+
+       * aarch64.h (enum aarch64_opnd_qualifier): Add
+       AARCH64_OPND_QLF_V_2H.
+
 2015-12-11  Matthew Wahab  <matthew.wahab@arm.com>
 
        * aarch64.h (aarch64_opnd): Add AARCH64_OPND_BARRIER_PSB.

diff --git a/include/opcode/aarch64.h b/include/opcode/aarch64.h
index b8a2c0142a2b85b191824c27d46c8c32f54b794b..80c91d3489e5b5b2d49b829c71a5783a689437a3 100644 (file)
--- a/include/opcode/aarch64.h
+++ b/include/opcode/aarch64.h
@@ -282,6 +282,7 @@ enum aarch64_opnd_qualifier
      constraint qualifiers for immediate operands wherever possible.  */
   AARCH64_OPND_QLF_V_8B,
   AARCH64_OPND_QLF_V_16B,
+  AARCH64_OPND_QLF_V_2H,
   AARCH64_OPND_QLF_V_4H,
   AARCH64_OPND_QLF_V_8H,
   AARCH64_OPND_QLF_V_2S,

diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index 9bfaea28bfb7dc4e5e2984f5cd395949325e65df..70a7195e8a5209fa989d796098939916f7b79ad7 100644 (file)
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,9 @@
+2015-12-14  Matthew Wahab  <matthew.wahab@arm.coM>
+
+       * aarch64-dis.c (get_vreg_qualifier_from_value): Update comment
+       and adjust calculation to ignore qualifier for type 2H.
+       * aarch64-opc.c (aarch64_opnd_qualifier): Add "2H".
+
 2015-12-14  Matthew Wahab  <matthew.wahab@arm.com>
 
        * aarch64-asm-2.c: Regenerate.

diff --git a/opcodes/aarch64-dis.c b/opcodes/aarch64-dis.c
index 6763c360596e996dbfce489520f9ee5606d8afbf..647ce0d0ba99ec3ba87c49e28600ef4e7aef2534 100644 (file)
--- a/opcodes/aarch64-dis.c
+++ b/opcodes/aarch64-dis.c
@@ -173,12 +173,19 @@ get_greg_qualifier_from_value (aarch64_insn value)
   return qualifier;
 }
 
-/* Given VALUE, return qualifier for a vector register.  */
+/* Given VALUE, return qualifier for a vector register.  This does not support
+   decoding instructions that accept the 2H vector type.  */
+
 static inline enum aarch64_opnd_qualifier
 get_vreg_qualifier_from_value (aarch64_insn value)
 {
   enum aarch64_opnd_qualifier qualifier = AARCH64_OPND_QLF_V_8B + value;
 
+  /* Instructions using vector type 2H should not call this function.  Skip over
+     the 2H qualifier.  */
+  if (qualifier >= AARCH64_OPND_QLF_V_2H)
+    qualifier += 1;
+
   assert (value <= 0x8
          && aarch64_get_qualifier_standard_value (qualifier) == value);
   return qualifier;

diff --git a/opcodes/aarch64-opc.c b/opcodes/aarch64-opc.c
index 88c4a284df87b3aeaa4fab217090c61edf39b1d8..28b991cfe1ce8bef7b3600a60dc39f611d6bba82 100644 (file)
--- a/opcodes/aarch64-opc.c
+++ b/opcodes/aarch64-opc.c
@@ -578,6 +578,7 @@ struct operand_qualifier_data aarch64_opnd_qualifiers[] =
 
   {1, 8, 0x0, "8b", OQK_OPD_VARIANT},
   {1, 16, 0x1, "16b", OQK_OPD_VARIANT},
+  {2, 2, 0x0, "2h", OQK_OPD_VARIANT},
   {2, 4, 0x2, "4h", OQK_OPD_VARIANT},
   {2, 8, 0x3, "8h", OQK_OPD_VARIANT},
   {4, 2, 0x4, "2s", OQK_OPD_VARIANT},