Antonio Maiorano 08f4b557fc Implement atomicCompareExchangeWeak returning struct instead of vec2
Also fixed implementation of this atomic in GLSL. It was emitting code
that would not compile because, as for HLSL, we must pass in the
variable directly to atomic funcs, not via an in/out arg to a function.

Bug: tint:1185
Change-Id: Id0e9f99d6368717511ef3a94473634c512e10cb8
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/91881
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
2022-05-31 13:20:28 +00:00

44 lines
1.4 KiB
WebGPU Shading Language

// Copyright 2021 The Tint Authors.
//
// 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.
////////////////////////////////////////////////////////////////////////////////
// File generated by tools/intrinsic-gen
// using the template:
// test/tint/builtins/builtins.wgsl.tmpl
// and the intrinsic defintion file:
// src/tint/intrinsics.def
//
// Do not modify this file directly
////////////////////////////////////////////////////////////////////////////////
struct SB_RW {
arg_0: atomic<i32>,
};
@group(0) @binding(0) var<storage, read_write> sb_rw : SB_RW;
// fn atomicCompareExchangeWeak(ptr<storage, atomic<i32>, read_write>, i32, i32) -> __atomic_compare_exchange_result<i32>
fn atomicCompareExchangeWeak_1bd40a() {
var res = atomicCompareExchangeWeak(&sb_rw.arg_0, 1, 1);
}
@stage(fragment)
fn fragment_main() {
atomicCompareExchangeWeak_1bd40a();
}
@stage(compute) @workgroup_size(1)
fn compute_main() {
atomicCompareExchangeWeak_1bd40a();
}