dan sinclair | e4392c9 | 2020-03-17 21:00:22 +0000 | [diff] [blame] | 1 | // Copyright 2020 The Tint Authors. |
| 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 | #include "src/writer/spirv/operand.h" |
| 16 | |
dan sinclair | e4392c9 | 2020-03-17 21:00:22 +0000 | [diff] [blame] | 17 | namespace tint { |
| 18 | namespace writer { |
| 19 | namespace spirv { |
| 20 | |
| 21 | // static |
| 22 | Operand Operand::Float(float val) { |
| 23 | Operand o(Kind::kFloat); |
| 24 | o.set_float(val); |
| 25 | return o; |
| 26 | } |
| 27 | |
| 28 | // static |
| 29 | Operand Operand::Int(uint32_t val) { |
| 30 | Operand o(Kind::kInt); |
| 31 | o.set_int(val); |
| 32 | return o; |
| 33 | } |
| 34 | |
| 35 | // static |
| 36 | Operand Operand::String(const std::string& val) { |
| 37 | Operand o(Kind::kString); |
| 38 | o.set_string(val); |
| 39 | return o; |
| 40 | } |
| 41 | |
| 42 | Operand::Operand(Kind kind) : kind_(kind) {} |
| 43 | |
| 44 | Operand::~Operand() = default; |
| 45 | |
| 46 | uint32_t Operand::length() const { |
| 47 | uint32_t val = 0; |
| 48 | switch (kind_) { |
| 49 | case Kind::kFloat: |
| 50 | case Kind::kInt: |
| 51 | val = 1; |
| 52 | break; |
| 53 | case Kind::kString: |
| 54 | // SPIR-V always nul-terminates strings. The length is rounded up to a |
Ryan Harrison | fd1526b | 2020-04-22 17:46:36 +0000 | [diff] [blame] | 55 | // multiple of 4 bytes with 0 bytes padding the end. Accounting for the |
| 56 | // nul terminator is why '+ 4u' is used here instead of '+ 3u'. |
| 57 | val = static_cast<uint32_t>((str_val_.length() + 4u) >> 2); |
dan sinclair | e4392c9 | 2020-03-17 21:00:22 +0000 | [diff] [blame] | 58 | break; |
| 59 | } |
| 60 | return val; |
| 61 | } |
| 62 | |
| 63 | } // namespace spirv |
| 64 | } // namespace writer |
| 65 | } // namespace tint |