aboutsummaryrefslogtreecommitdiff
path: root/client/asmjit/core/environment.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'client/asmjit/core/environment.cpp')
-rw-r--r--client/asmjit/core/environment.cpp64
1 files changed, 64 insertions, 0 deletions
diff --git a/client/asmjit/core/environment.cpp b/client/asmjit/core/environment.cpp
new file mode 100644
index 0000000..3be2b15
--- /dev/null
+++ b/client/asmjit/core/environment.cpp
@@ -0,0 +1,64 @@
+// AsmJit - Machine code generation for C++
+//
+// * Official AsmJit Home Page: https://asmjit.com
+// * Official Github Repository: https://github.com/asmjit/asmjit
+//
+// Copyright (c) 2008-2020 The AsmJit Authors
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would be
+// appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+// misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+#include "../core/api-build_p.h"
+#include "../core/environment.h"
+
+ASMJIT_BEGIN_NAMESPACE
+
+// X86 Target
+// ----------
+//
+// - 32-bit - Linux, OSX, BSD, and apparently also Haiku guarantee 16-byte
+// stack alignment. Other operating systems are assumed to have
+// 4-byte alignment by default for safety reasons.
+// - 64-bit - stack must be aligned to 16 bytes.
+//
+// ARM Target
+// ----------
+//
+// - 32-bit - Stack must be aligned to 8 bytes.
+// - 64-bit - Stack must be aligned to 16 bytes (hardware requirement).
+uint32_t Environment::stackAlignment() const noexcept {
+ if (is64Bit()) {
+ // Assume 16-byte alignment on any 64-bit target.
+ return 16;
+ }
+ else {
+ // The following platforms use 16-byte alignment in 32-bit mode.
+ if (isPlatformLinux() ||
+ isPlatformBSD() ||
+ isPlatformApple() ||
+ isPlatformHaiku()) {
+ return 16u;
+ }
+
+ if (isFamilyARM())
+ return 8;
+
+ // Bail to 4-byte alignment if we don't know.
+ return 4;
+ }
+}
+
+ASMJIT_END_NAMESPACE