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2da833d815
Add `tint::writer::FloatToString()`: Converts the float `f` to a string using fixed-point notation (not scientific). The float will be printed with the full precision required to describe the float. All trailing `0`s will be omitted after the last non-zero fractional number, unless the fractional is zero, in which case the number will end with `.0`. Use this for the wgsl, msl and hlsl backends. Change-Id: If5701136579e4398c31c673942f30e8877e9f813 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/33421 Commit-Queue: Ben Clayton <bclayton@google.com> Reviewed-by: David Neto <dneto@google.com>
79 lines
2.6 KiB
C++
79 lines
2.6 KiB
C++
// Copyright 2020 The Tint Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <memory>
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#include <vector>
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#include "gtest/gtest.h"
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#include "src/ast/constant_id_decoration.h"
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#include "src/ast/decorated_variable.h"
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#include "src/ast/float_literal.h"
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#include "src/ast/module.h"
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#include "src/ast/scalar_constructor_expression.h"
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#include "src/ast/type/array_type.h"
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#include "src/ast/type/f32_type.h"
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#include "src/ast/type_constructor_expression.h"
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#include "src/ast/variable.h"
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#include "src/writer/msl/generator_impl.h"
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#include "src/writer/msl/test_helper.h"
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namespace tint {
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namespace writer {
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namespace msl {
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namespace {
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using MslGeneratorImplTest = TestHelper;
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TEST_F(MslGeneratorImplTest, Emit_ModuleConstant) {
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ast::type::F32Type f32;
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ast::type::ArrayType ary(&f32, 3);
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ast::ExpressionList exprs;
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exprs.push_back(create<ast::ScalarConstructorExpression>(
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create<ast::FloatLiteral>(&f32, 1.0f)));
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exprs.push_back(create<ast::ScalarConstructorExpression>(
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create<ast::FloatLiteral>(&f32, 2.0f)));
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exprs.push_back(create<ast::ScalarConstructorExpression>(
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create<ast::FloatLiteral>(&f32, 3.0f)));
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auto* var = create<ast::Variable>("pos", ast::StorageClass::kNone, &ary);
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var->set_is_const(true);
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var->set_constructor(create<ast::TypeConstructorExpression>(&ary, exprs));
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ASSERT_TRUE(gen.EmitProgramConstVariable(var)) << gen.error();
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EXPECT_EQ(gen.result(), "constant float pos[3] = {1.0f, 2.0f, 3.0f};\n");
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}
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TEST_F(MslGeneratorImplTest, Emit_SpecConstant) {
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ast::type::F32Type f32;
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ast::VariableDecorationList decos;
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decos.push_back(create<ast::ConstantIdDecoration>(23, Source{}));
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auto* var = create<ast::DecoratedVariable>(
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create<ast::Variable>("pos", ast::StorageClass::kNone, &f32));
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var->set_decorations(decos);
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var->set_is_const(true);
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var->set_constructor(create<ast::ScalarConstructorExpression>(
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create<ast::FloatLiteral>(&f32, 3.0f)));
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ASSERT_TRUE(gen.EmitProgramConstVariable(var)) << gen.error();
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EXPECT_EQ(gen.result(), "constant float pos [[function_constant(23)]];\n");
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}
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} // namespace
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} // namespace msl
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} // namespace writer
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} // namespace tint
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