Rename "BLI_cpu.h" to "BLI_system.h" and add to it BLI_getpid() helper.

There is not much sense to have a whole BLI file just to check SSE2 on CPUs...
So idea is to rename it to more generic "BLI_system", and add to it more system-related
utils, like e.g. an include helper for getpid(), which allows to hide unix/windows
internals from rest of the code...

Reviewers: campbellbarton

Reviewed By: campbellbarton

Differential Revision: https://developer.blender.org/D439

1 files changed, 59 insertions, 0 deletions

diff --git a/source/blender/blenlib/intern/system.c b/source/blender/blenlib/intern/system.c
new file mode 100644
index 00000000000..e6389bc68f3
--- /dev/null
+++ b/source/blender/blenlib/intern/system.c
@@ -0,0 +1,59 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file blender/blenlib/intern/system.c
+ *  \ingroup bli
+ */
+
+
+#include "BLI_system.h"
+
+int BLI_cpu_support_sse2(void)
+{
+#if defined(__x86_64__) || defined(_M_X64)
+	/* x86_64 always has SSE2 instructions */
+	return 1;
+#elif defined(__GNUC__) && defined(i386)
+	/* for GCC x86 we check cpuid */
+	unsigned int d;
+	__asm__(
+	    "pushl %%ebx\n\t"
+	    "cpuid\n\t"
+	    "popl %%ebx\n\t"
+		: "=d" (d)
+		: "a" (1));
+	return (d & 0x04000000) != 0;
+#elif (defined(_MSC_VER) && defined(_M_IX86))
+	/* also check cpuid for MSVC x86 */
+	unsigned int d;
+	__asm {
+		xor     eax, eax
+		inc eax
+		push ebx
+		cpuid
+		pop ebx
+		mov d, edx
+	}
+	return (d & 0x04000000) != 0;
+#else
+	return 0;
+#endif
+}
+