SPIRV-Tools/source/parsed_operand.cpp
David Neto 4f750c0dcc Extract EmitNumericLiteral from disassembler
Test with disassembly of numeric literals.
2016-11-15 14:05:03 -05:00

76 lines
2.4 KiB
C++

// Copyright (c) 2016 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// This file contains utility functions for spv_parsed_operand_t.
#include "parsed_operand.h"
#include <cassert>
#include "util/hex_float.h"
namespace libspirv {
void EmitNumericLiteral(std::ostream* out, const spv_parsed_instruction_t& inst,
const spv_parsed_operand_t& operand) {
assert(operand.type == SPV_OPERAND_TYPE_LITERAL_INTEGER ||
operand.type == SPV_OPERAND_TYPE_TYPED_LITERAL_NUMBER);
assert(1 <= operand.num_words);
assert(operand.num_words <= 2);
const uint32_t word = inst.words[operand.offset];
if (operand.num_words == 1) {
switch (operand.number_kind) {
case SPV_NUMBER_SIGNED_INT:
*out << int32_t(word);
break;
case SPV_NUMBER_UNSIGNED_INT:
*out << word;
break;
case SPV_NUMBER_FLOATING:
if (operand.number_bit_width == 16) {
*out << spvutils::FloatProxy<spvutils::Float16>(
uint16_t(word & 0xFFFF));
} else {
// Assume 32-bit floats.
*out << spvutils::FloatProxy<float>(word);
}
break;
default:
assert(false && "Unreachable");
}
} else if (operand.num_words == 2) {
// Multi-word numbers are presented with lower order words first.
uint64_t bits =
uint64_t(word) | (uint64_t(inst.words[operand.offset + 1]) << 32);
switch (operand.number_kind) {
case SPV_NUMBER_SIGNED_INT:
*out << int64_t(bits);
break;
case SPV_NUMBER_UNSIGNED_INT:
*out << bits;
break;
case SPV_NUMBER_FLOATING:
// Assume only 64-bit floats.
*out << spvutils::FloatProxy<double>(bits);
break;
default:
assert(false && "Unreachable");
}
} else {
// TODO(dneto): Support more than 64-bits at a time.
assert(false && "Unhandled");
}
}
} // namespace libspirv