47 lines
1.2 KiB
C++
47 lines
1.2 KiB
C++
// This file is part of AsmJit project <https://asmjit.com>
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//
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// See asmjit.h or LICENSE.md for license and copyright information
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// SPDX-License-Identifier: Zlib
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#include "../core/api-build_p.h"
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#include "../core/environment.h"
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ASMJIT_BEGIN_NAMESPACE
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// X86 Target
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// ----------
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//
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// - 32-bit - Linux, OSX, BSD, and apparently also Haiku guarantee 16-byte
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// stack alignment. Other operating systems are assumed to have
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// 4-byte alignment by default for safety reasons.
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// - 64-bit - stack must be aligned to 16 bytes.
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//
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// ARM Target
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// ----------
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//
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// - 32-bit - Stack must be aligned to 8 bytes.
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// - 64-bit - Stack must be aligned to 16 bytes (hardware requirement).
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uint32_t Environment::stackAlignment() const noexcept {
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if (is64Bit()) {
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// Assume 16-byte alignment on any 64-bit target.
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return 16;
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}
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else {
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// The following platforms use 16-byte alignment in 32-bit mode.
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if (isPlatformLinux() ||
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isPlatformBSD() ||
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isPlatformApple() ||
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isPlatformHaiku()) {
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return 16u;
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}
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if (isFamilyARM())
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return 8;
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// Bail to 4-byte alignment if we don't know.
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return 4;
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}
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}
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ASMJIT_END_NAMESPACE
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