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Fix build on i686.
This patch is taken from upstream, with ChangeLog entries omitted.
From 5048338c5f21605441c6833907d1136ac9640b35 Mon Sep 17 00:00:00 2001
From: "mcatanzaro@igalia.com"
<mcatanzaro@igalia.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc>
Date: Wed, 10 Apr 2019 18:27:25 +0000
Subject: [PATCH] Unreviewed, rolling out r243989.
Broke i686 builds
Reverted changeset:
"[CMake] Detect SSE2 at compile time"
https://bugs.webkit.org/show_bug.cgi?id=196488
https://trac.webkit.org/changeset/243989
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@244138 268f45cc-cd09-0410-ab3c-d52691b4dbfc
---
CMakeLists.txt | 10 ---
ChangeLog | 12 ++++
Source/JavaScriptCore/ChangeLog | 12 ++++
.../assembler/MacroAssemblerX86Common.cpp | 7 ++
.../assembler/MacroAssemblerX86Common.h | 30 +++++++++
Source/cmake/FindSSE2.cmake | 65 -------------------
6 files changed, 61 insertions(+), 75 deletions(-)
delete mode 100644 Source/cmake/FindSSE2.cmake
diff --git a/CMakeLists.txt b/CMakeLists.txt
index acd77f4b623..d3e8a23f9ff 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -114,16 +114,6 @@ else ()
set(WTF_CPU_UNKNOWN 1)
endif ()
-#---------------------------
-# Make sure SSE2 is present.
-#---------------------------
-if (WTF_CPU_X86)
- include(FindSSE2)
- if (NOT SSE2_SUPPORT_FOUND)
- message(FATAL_ERROR "SSE2 support is required to compile WebKit")
- endif ()
-endif ()
-
# -----------------------------------------------------------------------------
# Determine the operating system
# -----------------------------------------------------------------------------
diff --git a/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.cpp b/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.cpp
index 8c752c0d030..31753589df7 100644
--- a/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.cpp
+++ b/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.cpp
@@ -168,6 +168,11 @@ static_assert(PROBE_OFFSETOF_REG(cpu.fprs, X86Registers::xmm15) == PROBE_CPU_XMM
static_assert(sizeof(Probe::State) == PROBE_SIZE, "Probe::State::size's matches ctiMasmProbeTrampoline");
static_assert((PROBE_EXECUTOR_OFFSET + PTR_SIZE) <= (PROBE_SIZE + OUT_SIZE), "Must have room after ProbeContext to stash the probe handler");
+#if CPU(X86)
+// SSE2 is a hard requirement on x86.
+static_assert(isSSE2Present(), "SSE2 support is required in JavaScriptCore");
+#endif
+
#undef PROBE_OFFSETOF
#if CPU(X86)
@@ -787,6 +792,7 @@ void MacroAssemblerX86Common::collectCPUFeatures()
std::call_once(onceKey, [] {
{
CPUID cpuid = getCPUID(0x1);
+ s_sse2CheckState = (cpuid[3] & (1 << 26)) ? CPUIDCheckState::Set : CPUIDCheckState::Clear;
s_sse4_1CheckState = (cpuid[2] & (1 << 19)) ? CPUIDCheckState::Set : CPUIDCheckState::Clear;
s_sse4_2CheckState = (cpuid[2] & (1 << 20)) ? CPUIDCheckState::Set : CPUIDCheckState::Clear;
s_popcntCheckState = (cpuid[2] & (1 << 23)) ? CPUIDCheckState::Set : CPUIDCheckState::Clear;
@@ -803,6 +809,7 @@ void MacroAssemblerX86Common::collectCPUFeatures()
});
}
+MacroAssemblerX86Common::CPUIDCheckState MacroAssemblerX86Common::s_sse2CheckState = CPUIDCheckState::NotChecked;
MacroAssemblerX86Common::CPUIDCheckState MacroAssemblerX86Common::s_sse4_1CheckState = CPUIDCheckState::NotChecked;
MacroAssemblerX86Common::CPUIDCheckState MacroAssemblerX86Common::s_sse4_2CheckState = CPUIDCheckState::NotChecked;
MacroAssemblerX86Common::CPUIDCheckState MacroAssemblerX86Common::s_avxCheckState = CPUIDCheckState::NotChecked;
diff --git a/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.h b/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.h
index ff097290ef3..097bcb0bb86 100644
--- a/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.h
+++ b/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.h
@@ -4197,11 +4197,41 @@ private:
}
#endif
+#if CPU(X86)
+#if OS(MAC_OS_X)
+
+ // All X86 Macs are guaranteed to support at least SSE2,
+ static bool isSSE2Present()
+ {
+ return true;
+ }
+
+#else // OS(MAC_OS_X)
+ static bool isSSE2Present()
+ {
+ if (s_sse2CheckState == CPUIDCheckState::NotChecked)
+ collectCPUFeatures();
+ return s_sse2CheckState == CPUIDCheckState::Set;
+ }
+
+#endif // OS(MAC_OS_X)
+#elif !defined(NDEBUG) // CPU(X86)
+
+ // On x86-64 we should never be checking for SSE2 in a non-debug build,
+ // but non debug add this method to keep the asserts above happy.
+ static bool isSSE2Present()
+ {
+ return true;
+ }
+
+#endif
+
using CPUID = std::array<unsigned, 4>;
static CPUID getCPUID(unsigned level);
static CPUID getCPUIDEx(unsigned level, unsigned count);
JS_EXPORT_PRIVATE static void collectCPUFeatures();
+ JS_EXPORT_PRIVATE static CPUIDCheckState s_sse2CheckState;
JS_EXPORT_PRIVATE static CPUIDCheckState s_sse4_1CheckState;
JS_EXPORT_PRIVATE static CPUIDCheckState s_sse4_2CheckState;
JS_EXPORT_PRIVATE static CPUIDCheckState s_avxCheckState;
diff --git a/Source/cmake/FindSSE2.cmake b/Source/cmake/FindSSE2.cmake
deleted file mode 100644
index 7a947feadd4..00000000000
--- a/Source/cmake/FindSSE2.cmake
+++ /dev/null
@@ -1,65 +0,0 @@
-#################################
-# Check for the presence of SSE2.
-#
-# Once done, this will define:
-# - SSE2_SUPPORT_FOUND - the system supports (at least) SSE2.
-#
-# Copyright (c) 2014, Pablo Fernandez Alcantarilla, Jesus Nuevo
-# Copyright (c) 2019, Igalia S.L.
-#
-# Redistribution and use in source and binary forms, with or without modification,
-# are permitted provided that the following conditions are met:
-#
-# * Redistributions of source code must retain the above copyright notice,
-# this list of conditions and the following disclaimer.
-#
-# * Redistributions in binary form must reproduce the above copyright notice,
-# this list of conditions and the following disclaimer in the documentation
-# and/or other materials provided with the distribution.
-#
-# * Neither the name of the copyright holders nor the names of its contributors
-# may be used to endorse or promote products derived from this software without
-# specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
-# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
-# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
-# SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
-# TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
-# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
-# WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-set(SSE2_SUPPORT_FOUND FALSE)
-
-macro(CHECK_FOR_SSE2)
- include(CheckCXXSourceRuns)
-
- check_cxx_source_runs("
- #include <emmintrin.h>
- int main ()
- {
- __m128d a, b;
- double vals[2] = {0};
- a = _mm_loadu_pd (vals);
- b = _mm_add_pd (a,a);
- _mm_storeu_pd (vals,b);
- return(0);
- }"
- HAVE_SSE2_EXTENSIONS)
-
- if (CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_COMPILER_IS_CLANG)
- if (HAVE_SSE2_EXTENSIONS)
- set(SSE2_SUPPORT_FOUND TRUE)
- endif ()
- elseif (MSVC AND NOT CMAKE_CL_64)
- if (HAVE_SSE2_EXTENSIONS)
- set(SSE2_SUPPORT_FOUND TRUE)
- message(STATUS "Found SSE2 extensions.")
- endif (HAVE_SSE2_EXTENSIONS)
- endif ()
-
-endmacro(CHECK_FOR_SSE2)
-
-CHECK_FOR_SSE2()
--
2.21.0
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