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// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#if !V8_ENABLE_WEBASSEMBLY
#error This header should only be included if WebAssembly is enabled.
#endif // !V8_ENABLE_WEBASSEMBLY
#ifndef V8_WASM_WASM_FEATURE_FLAGS_H_
#define V8_WASM_WASM_FEATURE_FLAGS_H_
// See https://github.com/WebAssembly/proposals for an overview of current
// WebAssembly proposals.
// Experimental features (disabled by default).
#define FOREACH_WASM_EXPERIMENTAL_FEATURE_FLAG(V) /* (force 80 columns) */ \
/* No official proposal (yet?). */ \
/* V8 side owner: clemensb */ \
V(compilation_hints, "compilation hints section", false) \
\
/* GC proposal (early prototype, might change dramatically) */ \
/* Official proposal: https://github.com/WebAssembly/gc */ \
/* Prototype engineering spec: https://bit.ly/3cWcm6Q */ \
/* V8 side owner: jkummerow */ \
V(gc, "garbage collection", false) \
\
/* Non-specified, V8-only experimental additions to the GC proposal */ \
/* V8 side owner: jkummerow */ \
V(gc_experiments, "garbage collection V8-only experimental features", false) \
V(nn_locals, "allow non-defaultable/non-nullable locals", false) \
\
/* Typed function references proposal. */ \
/* Official proposal: https://github.com/WebAssembly/function-references */ \
/* V8 side owner: manoskouk */ \
V(typed_funcref, "typed function references", false) \
\
/* Memory64 proposal. */ \
/* https://github.com/WebAssembly/memory64 */ \
/* V8 side owner: clemensb */ \
V(memory64, "memory64", false) \
\
/* Relaxed SIMD proposal. */ \
/* https://github.com/WebAssembly/relaxed-simd */ \
/* V8 side owner: zhin */ \
V(relaxed_simd, "relaxed simd", false) \
\
/* Branch Hinting proposal. */ \
/* https://github.com/WebAssembly/branch-hinting */ \
/* V8 side owner: jkummerow */ \
V(branch_hinting, "branch hinting", false)
// #############################################################################
// Staged features (disabled by default, but enabled via --wasm-staging (also
// exposed as chrome://flags/#enable-experimental-webassembly-features). Staged
// features get limited fuzzer coverage, and should come with their own tests.
// They are not run through all fuzzers though and don't get much exposure in
// the wild. Staged features do not necessarily be fully stabilized. They should
// be shipped with enough lead time to the next branch to allow for
// stabilization.
#define FOREACH_WASM_STAGING_FEATURE_FLAG(V) /* (force 80 columns) */ \
/* Exception handling proposal. */ \
/* https://github.com/WebAssembly/exception-handling */ \
/* V8 side owner: thibaudm */ \
/* Staged in v8.9 */ \
V(eh, "exception handling opcodes", false) \
\
/* Reference Types, a.k.a. reftypes proposal. */ \
/* https://github.com/WebAssembly/reference-types */ \
/* V8 side owner: ahaas */ \
/* Staged in v7.8. */ \
V(reftypes, "reference type opcodes", false) \
\
/* Tail call / return call proposal. */ \
/* https://github.com/webassembly/tail-call */ \
/* V8 side owner: thibaudm */ \
/* Staged in v8.7 * */ \
V(return_call, "return call opcodes", false) \
\
/* Type reflection proposal. */ \
/* https://github.com/webassembly/js-types */ \
/* V8 side owner: ahaas */ \
/* Staged in v7.8. */ \
V(type_reflection, "wasm type reflection in JS", false)
// #############################################################################
// Shipped features (enabled by default). Remove the feature flag once they hit
// stable and are expected to stay enabled.
#define FOREACH_WASM_SHIPPED_FEATURE_FLAG(V) /* (force 80 columns) */ \
/* Fixed-width SIMD operations. */ \
/* https://github.com/webassembly/simd */ \
/* V8 side owner: gdeepti, zhin */ \
/* Staged in v8.7 * */ \
/* Shipped in v9.1 * */ \
V(simd, "SIMD opcodes", true) \
\
/* Threads proposal. */ \
/* https://github.com/webassembly/threads */ \
/* NOTE: This is enabled via chromium flag on desktop systems since v7.4, */ \
/* and on android from 9.1. Threads are only available when */ \
/* SharedArrayBuffers are enabled as well, and are gated by COOP/COEP */ \
/* headers, more fine grained control is in the chromium codebase */ \
/* ITS: https://groups.google.com/a/chromium.org/d/msg/blink-dev/ */ \
/* tD6np-OG2PU/rcNGROOMFQAJ */ \
/* V8 side owner: gdeepti */ \
V(threads, "thread opcodes", true) \
\
// Combination of all available wasm feature flags.
#define FOREACH_WASM_FEATURE_FLAG(V) \
FOREACH_WASM_EXPERIMENTAL_FEATURE_FLAG(V) \
FOREACH_WASM_STAGING_FEATURE_FLAG(V) \
FOREACH_WASM_SHIPPED_FEATURE_FLAG(V)
#endif // V8_WASM_WASM_FEATURE_FLAGS_H_
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