mesa/src/compiler/nir/nir_opcodes_c.py

#
# Copyright (C) 2014 Connor Abbott
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice (including the next
# paragraph) shall be included in all copies or substantial portions of the
# Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
#
# Authors:
#    Connor Abbott (cwabbott0@gmail.com)

from nir_opcodes import opcodes, type_sizes
from mako.template import Template

template = Template("""
#include "nir.h"

nir_op
nir_type_conversion_op(nir_alu_type src, nir_alu_type dst, nir_rounding_mode rnd)
{
   nir_alu_type src_base = (nir_alu_type) nir_alu_type_get_base_type(src);
   nir_alu_type dst_base = (nir_alu_type) nir_alu_type_get_base_type(dst);
   unsigned src_bit_size = nir_alu_type_get_type_size(src);
   unsigned dst_bit_size = nir_alu_type_get_type_size(dst);

   if (src == dst && src_base == nir_type_float) {
      return nir_op_mov;
   } else if (src == dst && src_base == nir_type_bool) {
      return nir_op_mov;
   } else if ((src_base == nir_type_int || src_base == nir_type_uint) &&
              (dst_base == nir_type_int || dst_base == nir_type_uint) &&
              src_bit_size == dst_bit_size) {
      /* Integer <-> integer conversions with the same bit-size on both
       * ends are just no-op moves.
       */
      return nir_op_mov;
   }

   /* f2b, i2b, and u2b do not exist.  Use ine or fne (via nir_type_conversion)
    * instead.
    */
   assert(src_base == dst_base || dst_base != nir_type_bool);

   switch (src_base) {
%     for src_t in ['int', 'uint', 'float', 'bool']:
      case nir_type_${src_t}:
         switch (dst_base) {
%           for dst_t in ['int', 'uint', 'float', 'bool']:
            case nir_type_${dst_t}:
%              if src_t in ['int', 'uint'] and dst_t in ['int', 'uint']:
%                 if dst_t == 'int':
<%                   continue %>
%                 else:
<%                   dst_t = src_t %>
%                 endif
%              elif src_t == 'bool' and dst_t in ['int', 'uint', 'bool']:
%                 if dst_t == 'int':
<%                   continue %>
%                 else:
<%                   dst_t = 'int' %>
%                 endif
%              elif src_t != 'bool' and dst_t == 'bool':
<%                   continue %>
%              endif
               switch (dst_bit_size) {
%                 for dst_bits in type_sizes(dst_t):
                  case ${dst_bits}:
%                    if src_t == 'float' and dst_t == 'float' and dst_bits == 16:
                     switch(rnd) {
%                       for rnd_t in [('rtne', '_rtne'), ('rtz', '_rtz'), ('undef', '')]:
                        case nir_rounding_mode_${rnd_t[0]}:
                           return ${'nir_op_{0}2{1}{2}{3}'.format(src_t[0], dst_t[0],
                                                                   dst_bits, rnd_t[1])};
%                       endfor
                        default:
                           unreachable("Invalid 16-bit nir rounding mode");
                     }
%                    else:
                     assert(rnd == nir_rounding_mode_undef);
                     return ${'nir_op_{0}2{1}{2}'.format(src_t[0], dst_t[0], dst_bits)};
%                    endif
%                 endfor
                  default:
                     unreachable("Invalid nir alu bit size");
               }
%           endfor
            default:
               unreachable("Invalid nir alu base type");
         }
%     endfor
      default:
         unreachable("Invalid nir alu base type");
   }
}

const nir_op_info nir_op_infos[nir_num_opcodes] = {
% for name, opcode in sorted(opcodes.items()):
{
   .name = "${name}",
   .num_inputs = ${opcode.num_inputs},
   .output_size = ${opcode.output_size},
   .output_type = ${"nir_type_" + opcode.output_type},
   .input_sizes = {
      ${ ", ".join(str(size) for size in opcode.input_sizes) }
   },
   .input_types = {
      ${ ", ".join("nir_type_" + type for type in opcode.input_types) }
   },
   .is_conversion = ${"true" if opcode.is_conversion else "false"},
   .algebraic_properties =
      ${ "0" if opcode.algebraic_properties == "" else " | ".join(
            "NIR_OP_IS_" + prop.upper() for prop in
               opcode.algebraic_properties.strip().split(" ")) }
},
% endfor
};
""")

print(template.render(opcodes=opcodes, type_sizes=type_sizes))