preload %FARHOME%\legacy lua51.dll for x86 without SSE2

far/changelog

@@ -1,3 +1,7 @@
+w17 30.08.2017 12:21:12 +0300 - build 5015
+
+1. Plerolad %FARHOME%\legacy\lua51.dll if x86 CPU doesn't support SSE2.
+
 drkns 26.08.2017 11:20:44 +0100 - build 5014
 
 1. В макрофункции date творилась дичь:

far/main.cpp

@@ -149,6 +149,34 @@ static int MainProcess(
 			ppanel = Global->Opt->LocalProfilePath;
 		}
 
+#if defined(_WIN32) && !defined(_WIN64) && (defined(_MSC_VER) || defined(__GNUC__))
+      // actual lua51.dll uses SSE2 instructions on x86.
+		// so we have to preload legacy lua51.dll if x86 CPU doesn't support SSE2
+		{
+			bool have_sse2 = false;
+			int info[4] = { 0, 0, 0, 0 };
+#ifdef _MSC_VER
+#include <intrin.h>
+			__cpuidex(info, 0, 0);
+			if (info[0] >= 1) {
+				__cpuidex(info, 1, 0);
+#else
+#include <cpuid.h>
+			__cpuid_count(0, 0, info[0], info[1], info[2], info[3]);
+			if (info[0] >= 1) {
+				__cpuid_count(1, 0, info[0], info[1], info[2], info[3]);
+#endif
+				have_sse2 = (info[3] & ((int)1 << 26)) != 0;
+			}
+
+			if (!have_sse2)
+			{
+				auto legay_path = Global->g_strFarPath + L"\\legacy\\lua51.dll"; // %FARHOME%\legacy\lua51.dll
+				LoadLibraryW(legay_path.data());
+			}
+		}
+#endif
+
 		if (!ename.empty() || !vname.empty())
 		{
 			Global->OnlyEditorViewerUsed = true;
@@ -634,7 +662,7 @@ static int mainImpl(const range<wchar_t**>& Args)
 								Iter = Next;
 							}
 						}
-						}
+					}
 					break;
 
 				case L'T':

far/vbuild.m4

@@ -1 +1 @@
-m4_define(BUILD,5014)m4_dnl
+m4_define(BUILD,5015)m4_dnl