gdb/features/aarch64-sme.c

   1 /* Copyright (C) 2023-2024 Free Software Foundation, Inc.
   2
   3    This file is part of GDB.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include "gdbsupport/tdesc.h"
  19 #include <cmath>
  20
  21 /* This function is NOT auto generated from xml.  Create the AArch64 SME
  22    feature into RESULT.  SVL is the streaming vector length in bytes.
  23
  24    The ZA register has a total size of SVL x SVL.
  25
  26    When in Streaming SVE mode, the effective SVE vector length, VL, is equal
  27    to SVL.  */
  28
  29 static int
  30 create_feature_aarch64_sme (struct target_desc *result, long regnum,
  31                             size_t svl)
  32 {
  33   struct tdesc_feature *feature;
  34   tdesc_type *element_type;
  35
  36   feature = tdesc_create_feature (result, "org.gnu.gdb.aarch64.sme");
  37
  38   /* The SVG register.  */
  39   tdesc_create_reg (feature, "svg", regnum++, 1, nullptr, 64, "int");
  40
  41   /* SVCR flags type.  */
  42   tdesc_type_with_fields *type_with_fields
  43     = tdesc_create_flags (feature, "svcr_flags", 8);
  44   tdesc_add_flag (type_with_fields, 0, "SM");
  45   tdesc_add_flag (type_with_fields, 1, "ZA");
  46
  47   /* The SVCR register.  */
  48   tdesc_create_reg (feature, "svcr", regnum++, 1, nullptr, 64, "svcr_flags");
  49
  50   /* Byte type.  */
  51   element_type = tdesc_named_type (feature, "uint8");
  52   /* Vector of bytes.  */
  53   element_type = tdesc_create_vector (feature, "sme_bv", element_type,
  54                                       svl);
  55   /* Vector of vector of bytes (Matrix).  */
  56   element_type = tdesc_create_vector (feature, "sme_bvv", element_type,
  57                                       svl);
  58
  59   /* The following is the ZA register set.  */
  60   tdesc_create_reg (feature, "za", regnum++, 1, nullptr,
  61                     std::pow (svl, 2) * 8, "sme_bvv");
  62   return regnum;
  63 }