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65 lines
2.1 KiB
65 lines
2.1 KiB
4 years ago
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// AsmJit - Machine code generation for C++
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//
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// * Official AsmJit Home Page: https://asmjit.com
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// * Official Github Repository: https://github.com/asmjit/asmjit
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//
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// Copyright (c) 2008-2020 The AsmJit Authors
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would be
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// appreciated but is not required.
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// 2. Altered source versions must be plainly marked as such, and must not be
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// misrepresented as being the original software.
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// 3. This notice may not be removed or altered from any source distribution.
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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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