59bb18867a
The testb instruction requires the REX prefix when either of its operands uses a register with the high bit set. The existing code only considered the register operand. In the test case the REX prefix was not emitted because the testb instruction had the register operand RAX which does not have the high bit set. The REX prefix was necessary though because the memory operand used R8, which has the high bit set. R=bmeurer@chromium.org BUG=chromium:688876 Change-Id: Ib214bebbe75965664f2aea530e29afa95a54f44f Reviewed-on: https://chromium-review.googlesource.com/439145 Commit-Queue: Andreas Haas <ahaas@chromium.org> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org> Cr-Commit-Position: refs/heads/master@{#43030}
43 lines
1.1 KiB
JavaScript
43 lines
1.1 KiB
JavaScript
// Copyright 2017 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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load('test/mjsunit/wasm/wasm-constants.js');
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load('test/mjsunit/wasm/wasm-module-builder.js');
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(function() {
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var builder = new WasmModuleBuilder();
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builder.addMemory(16, 32, false);
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builder.addFunction('test', kSig_i_i)
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.addBodyWithEnd([
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kExprI32Const, 0x41,
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kExprI32Const, 0x45,
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kExprI32Const, 0x41,
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kExprI32DivU,
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kExprI32LoadMem8S, 0x00, 0x3a,
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kExprI32Const, 0x75,
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kExprI32Const, 0x75,
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kExprI32Const, 0x6e,
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kExprI32Eqz,
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kExprI32LoadMem8S, 0x00, 0x3a,
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kExprI32Add,
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kExprI32DivU,
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kExprI32LoadMem8S, 0x00, 0x74,
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kExprI32And,
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kExprI32Eqz,
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kExprI32And,
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kExprGrowMemory, 0x00,
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kExprI32Const, 0x55,
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kExprI32LoadMem8S, 0x00, 0x3a,
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kExprI32LoadMem16U, 0x00, 0x71,
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kExprI32Const, 0x00,
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kExprI32RemU,
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kExprI32And,
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kExprI32Eqz,
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kExprEnd, // @44
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])
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.exportFunc();
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var module = builder.instantiate();
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assertThrows(() => {module.exports.test(1);});
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})();
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