1// Copyright (c) 2016 Google Inc.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15// This file contains utility functions for spv_parsed_operand_t.
16
17#include "source/parsed_operand.h"
18
19#include <cassert>
20#include "source/util/hex_float.h"
21
22namespace spvtools {
23
24void EmitNumericLiteral(std::ostream* out, const spv_parsed_instruction_t& inst,
25 const spv_parsed_operand_t& operand) {
26 if (operand.type != SPV_OPERAND_TYPE_LITERAL_INTEGER &&
27 operand.type != SPV_OPERAND_TYPE_TYPED_LITERAL_NUMBER)
28 return;
29 if (operand.num_words < 1) return;
30 // TODO(dneto): Support more than 64-bits at a time.
31 if (operand.num_words > 2) return;
32
33 const uint32_t word = inst.words[operand.offset];
34 if (operand.num_words == 1) {
35 switch (operand.number_kind) {
36 case SPV_NUMBER_SIGNED_INT:
37 *out << int32_t(word);
38 break;
39 case SPV_NUMBER_UNSIGNED_INT:
40 *out << word;
41 break;
42 case SPV_NUMBER_FLOATING:
43 if (operand.number_bit_width == 16) {
44 *out << spvtools::utils::FloatProxy<spvtools::utils::Float16>(
45 uint16_t(word & 0xFFFF));
46 } else {
47 // Assume 32-bit floats.
48 *out << spvtools::utils::FloatProxy<float>(word);
49 }
50 break;
51 default:
52 break;
53 }
54 } else if (operand.num_words == 2) {
55 // Multi-word numbers are presented with lower order words first.
56 uint64_t bits =
57 uint64_t(word) | (uint64_t(inst.words[operand.offset + 1]) << 32);
58 switch (operand.number_kind) {
59 case SPV_NUMBER_SIGNED_INT:
60 *out << int64_t(bits);
61 break;
62 case SPV_NUMBER_UNSIGNED_INT:
63 *out << bits;
64 break;
65 case SPV_NUMBER_FLOATING:
66 // Assume only 64-bit floats.
67 *out << spvtools::utils::FloatProxy<double>(bits);
68 break;
69 default:
70 break;
71 }
72 }
73}
74} // namespace spvtools
75