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1f440d00d2
nir_type_conversion enables new operations to handle rounding modes to
convert to fp16 values. Two new opcodes are enabled nir_op_f2f16_rtne
and nir_op_f2f16_rtz.
The undefined behaviour doesn't has any effect and uses the original
nir_op_f2f16 operation.
v2: Indentation fixed (Jason Ekstrand)
v3: Use explicit case for undefined rounding and assert if
rounding mode is used for non 16-bit float conversions
(Jason Ekstrand)
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
133 lines
4.9 KiB
Python
133 lines
4.9 KiB
Python
#
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# Copyright (C) 2014 Connor Abbott
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the "Software"),
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# to deal in the Software without restriction, including without limitation
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# the rights to use, copy, modify, merge, publish, distribute, sublicense,
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# and/or sell copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice (including the next
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# paragraph) shall be included in all copies or substantial portions of the
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# Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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# IN THE SOFTWARE.
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#
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# Authors:
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# Connor Abbott (cwabbott0@gmail.com)
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from nir_opcodes import opcodes
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from mako.template import Template
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template = Template("""
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#include "nir.h"
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nir_op
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nir_type_conversion_op(nir_alu_type src, nir_alu_type dst, nir_rounding_mode rnd)
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{
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nir_alu_type src_base = (nir_alu_type) nir_alu_type_get_base_type(src);
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nir_alu_type dst_base = (nir_alu_type) nir_alu_type_get_base_type(dst);
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unsigned src_bit_size = nir_alu_type_get_type_size(src);
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unsigned dst_bit_size = nir_alu_type_get_type_size(dst);
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if (src == dst && src_base == nir_type_float) {
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return nir_op_fmov;
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} else if ((src_base == nir_type_int || src_base == nir_type_uint) &&
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(dst_base == nir_type_int || dst_base == nir_type_uint) &&
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src_bit_size == dst_bit_size) {
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/* Integer <-> integer conversions with the same bit-size on both
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* ends are just no-op moves.
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*/
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return nir_op_imov;
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}
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switch (src_base) {
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% for src_t in ['int', 'uint', 'float']:
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case nir_type_${src_t}:
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switch (dst_base) {
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% for dst_t in ['int', 'uint', 'float']:
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case nir_type_${dst_t}:
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% if src_t in ['int', 'uint'] and dst_t in ['int', 'uint']:
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% if dst_t == 'int':
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<% continue %>
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% else:
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<% dst_t = src_t %>
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% endif
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% endif
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switch (dst_bit_size) {
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% for dst_bits in [16, 32, 64]:
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case ${dst_bits}:
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% if src_t == 'float' and dst_t == 'float' and dst_bits == 16:
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switch(rnd) {
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% for rnd_t in ['rtne', 'rtz', 'undef']:
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case nir_rounding_mode_${rnd_t}:
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return ${'nir_op_{0}2{1}{2}_{3}'.format(src_t[0], dst_t[0],
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dst_bits, rnd_t)};
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% endfor
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default:
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unreachable("Invalid 16-bit nir rounding mode");
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}
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% else:
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assert(rnd == nir_rounding_mode_undef);
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return ${'nir_op_{0}2{1}{2}'.format(src_t[0], dst_t[0], dst_bits)};
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% endif
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% endfor
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default:
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unreachable("Invalid nir alu bit size");
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}
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% endfor
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case nir_type_bool:
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% if src_t == 'float':
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return nir_op_f2b;
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% else:
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return nir_op_i2b;
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% endif
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default:
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unreachable("Invalid nir alu base type");
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}
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% endfor
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case nir_type_bool:
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switch (dst_base) {
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case nir_type_int:
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case nir_type_uint:
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return nir_op_b2i;
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case nir_type_float:
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return nir_op_b2f;
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default:
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unreachable("Invalid nir alu base type");
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}
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default:
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unreachable("Invalid nir alu base type");
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}
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}
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const nir_op_info nir_op_infos[nir_num_opcodes] = {
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% for name, opcode in sorted(opcodes.iteritems()):
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{
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.name = "${name}",
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.num_inputs = ${opcode.num_inputs},
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.output_size = ${opcode.output_size},
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.output_type = ${"nir_type_" + opcode.output_type},
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.input_sizes = {
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${ ", ".join(str(size) for size in opcode.input_sizes) }
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},
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.input_types = {
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${ ", ".join("nir_type_" + type for type in opcode.input_types) }
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},
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.algebraic_properties =
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${ "0" if opcode.algebraic_properties == "" else " | ".join(
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"NIR_OP_IS_" + prop.upper() for prop in
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opcode.algebraic_properties.strip().split(" ")) }
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},
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% endfor
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};
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""")
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print template.render(opcodes=opcodes)
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