90 lines
3.5 KiB
Diff
90 lines
3.5 KiB
Diff
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Index: /trunk/CMakeLists.txt
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===================================================================
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--- /trunk/CMakeLists.txt (revision 244137)
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+++ /trunk/CMakeLists.txt (revision 244138)
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@@ -115,14 +115,4 @@
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endif ()
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-#---------------------------
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-# Make sure SSE2 is present.
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-#---------------------------
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-if (WTF_CPU_X86)
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- include(FindSSE2)
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- if (NOT SSE2_SUPPORT_FOUND)
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- message(FATAL_ERROR "SSE2 support is required to compile WebKit")
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- endif ()
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-endif ()
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-
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# -----------------------------------------------------------------------------
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# Determine the operating system
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Index: /trunk/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.cpp
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===================================================================
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--- /trunk/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.cpp (revision 244137)
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+++ /trunk/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.cpp (revision 244138)
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@@ -168,4 +168,9 @@
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static_assert(sizeof(Probe::State) == PROBE_SIZE, "Probe::State::size's matches ctiMasmProbeTrampoline");
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static_assert((PROBE_EXECUTOR_OFFSET + PTR_SIZE) <= (PROBE_SIZE + OUT_SIZE), "Must have room after ProbeContext to stash the probe handler");
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+
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+#if CPU(X86)
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+// SSE2 is a hard requirement on x86.
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+static_assert(isSSE2Present(), "SSE2 support is required in JavaScriptCore");
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+#endif
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#undef PROBE_OFFSETOF
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@@ -788,4 +793,5 @@
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{
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CPUID cpuid = getCPUID(0x1);
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+ s_sse2CheckState = (cpuid[3] & (1 << 26)) ? CPUIDCheckState::Set : CPUIDCheckState::Clear;
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s_sse4_1CheckState = (cpuid[2] & (1 << 19)) ? CPUIDCheckState::Set : CPUIDCheckState::Clear;
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s_sse4_2CheckState = (cpuid[2] & (1 << 20)) ? CPUIDCheckState::Set : CPUIDCheckState::Clear;
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@@ -804,4 +810,5 @@
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}
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+MacroAssemblerX86Common::CPUIDCheckState MacroAssemblerX86Common::s_sse2CheckState = CPUIDCheckState::NotChecked;
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MacroAssemblerX86Common::CPUIDCheckState MacroAssemblerX86Common::s_sse4_1CheckState = CPUIDCheckState::NotChecked;
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MacroAssemblerX86Common::CPUIDCheckState MacroAssemblerX86Common::s_sse4_2CheckState = CPUIDCheckState::NotChecked;
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Index: /trunk/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.h
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===================================================================
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--- /trunk/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.h (revision 244137)
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+++ /trunk/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.h (revision 244138)
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@@ -4198,4 +4198,33 @@
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#endif
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+#if CPU(X86)
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+#if OS(MAC_OS_X)
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+
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+ // All X86 Macs are guaranteed to support at least SSE2,
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+ static bool isSSE2Present()
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+ {
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+ return true;
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+ }
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+
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+#else // OS(MAC_OS_X)
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+ static bool isSSE2Present()
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+ {
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+ if (s_sse2CheckState == CPUIDCheckState::NotChecked)
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+ collectCPUFeatures();
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+ return s_sse2CheckState == CPUIDCheckState::Set;
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+ }
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+
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+#endif // OS(MAC_OS_X)
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+#elif !defined(NDEBUG) // CPU(X86)
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+
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+ // On x86-64 we should never be checking for SSE2 in a non-debug build,
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+ // but non debug add this method to keep the asserts above happy.
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+ static bool isSSE2Present()
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+ {
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+ return true;
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+ }
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+
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+#endif
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+
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using CPUID = std::array<unsigned, 4>;
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static CPUID getCPUID(unsigned level);
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@@ -4203,4 +4232,5 @@
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JS_EXPORT_PRIVATE static void collectCPUFeatures();
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+ JS_EXPORT_PRIVATE static CPUIDCheckState s_sse2CheckState;
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JS_EXPORT_PRIVATE static CPUIDCheckState s_sse4_1CheckState;
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JS_EXPORT_PRIVATE static CPUIDCheckState s_sse4_2CheckState;
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