Fix SSSE3 cpuid checks

As per afb62b0e96e9bf91ec99857cc16ddb094bcaa3be swing the actual
check into a separate file and make only that file be compiled
with the specific flag.

Change-Id: I7f75453f21271f38e0099bdf6b40f9138d8b4cff
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/103496
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>

3 files changed, 41 insertions, 17 deletions

diff --git a/tools/qa/cppunit/test_cpu_runtime_detection_SSSE3.cxx b/tools/qa/cppunit/test_cpu_runtime_detection_SSSE3.cxx
index 9e63e59c7835..290d073745da 100644
--- a/tools/qa/cppunit/test_cpu_runtime_detection_SSSE3.cxx
+++ b/tools/qa/cppunit/test_cpu_runtime_detection_SSSE3.cxx
@@ -9,7 +9,7 @@
 
 #include <tools/simdsupport.hxx>
 
-#ifdef LO_SSSE3_AVAILABLE
+#include "test_cpu_runtime_detection_x86_checks.hxx"
 
 #include <cppunit/TestAssert.h>
 #include <cppunit/TestFixture.h>
@@ -23,7 +23,6 @@ namespace
 class CpuRuntimeDetection_SSSE3 : public CppUnit::TestFixture
 {
 public:
-    void checkSSSE3();
     void testCpuRuntimeDetection();
 
     CPPUNIT_TEST_SUITE(CpuRuntimeDetection_SSSE3);
@@ -33,26 +32,13 @@ public:
 
 void CpuRuntimeDetection_SSSE3::testCpuRuntimeDetection()
 {
-    // can only run if this function if CPU supports SSSE3
+    // can only run this function if CPU supports SSSE3
     if (cpuid::isCpuInstructionSetSupported(cpuid::InstructionSetFlags::SSSE3))
-        checkSSSE3();
-}
-
-void CpuRuntimeDetection_SSSE3::checkSSSE3()
-{
-    // Try some SSSE3 intrinsics calculation
-    __m128i a = _mm_set1_epi32(3);
-    __m128i b = _mm_set1_epi32(3);
-    __m128i c = _mm_maddubs_epi16(a, b);
-
-    // Check result is 9
-    CPPUNIT_ASSERT_EQUAL(0xFFFF, _mm_movemask_epi8(_mm_cmpeq_epi32(c, _mm_set1_epi32(9))));
+        CpuRuntimeDetectionX86Checks::checkSSSE3();
 }
 
 CPPUNIT_TEST_SUITE_REGISTRATION(CpuRuntimeDetection_SSSE3);
 
 } // end anonymous namespace
 
-#endif
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/tools/qa/cppunit/test_cpu_runtime_detection_SSSE3_check.cxx b/tools/qa/cppunit/test_cpu_runtime_detection_SSSE3_check.cxx
new file mode 100644
index 000000000000..5fd46e62c185
--- /dev/null
+++ b/tools/qa/cppunit/test_cpu_runtime_detection_SSSE3_check.cxx
@@ -0,0 +1,37 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <sal/types.h>
+#include <tools/simdsupport.hxx>
+
+#include <cppunit/TestAssert.h>
+#include <cppunit/TestFixture.h>
+#include <cppunit/extensions/HelperMacros.h>
+#include <cppunit/plugin/TestPlugIn.h>
+
+#include "test_cpu_runtime_detection_x86_checks.hxx"
+
+/* WARNING: This file is compiled with SSSE3 support, don't call
+ * any function without checking cpuid to check the CPU can actually
+ * handle it.
+ */
+void CpuRuntimeDetectionX86Checks::checkSSSE3()
+{
+#ifdef LO_SSSE3_AVAILABLE
+    // Try some SSSE3 intrinsics calculation
+    __m128i a = _mm_set1_epi32(3);
+    __m128i b = _mm_set1_epi32(3);
+    __m128i c = _mm_maddubs_epi16(a, b);
+
+    // Check result is 9
+    CPPUNIT_ASSERT_EQUAL(0xFFFF, _mm_movemask_epi8(_mm_cmpeq_epi32(c, _mm_set1_epi32(9))));
+#endif
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/tools/qa/cppunit/test_cpu_runtime_detection_x86_checks.hxx b/tools/qa/cppunit/test_cpu_runtime_detection_x86_checks.hxx
index 94396bf6285d..8321216c05b1 100644
--- a/tools/qa/cppunit/test_cpu_runtime_detection_x86_checks.hxx
+++ b/tools/qa/cppunit/test_cpu_runtime_detection_x86_checks.hxx
@@ -14,6 +14,7 @@ class CpuRuntimeDetectionX86Checks
 {
 public:
     static void checkAVX2();
+    static void checkSSSE3();
 };
 
 #endif