Remove checks to see if system's processor matches the target the code was compiled for.

(Preparation for multi-target output.)

examples/rt/rt.cpp

@@ -45,7 +45,6 @@
 #include <string.h>
 #include <sys/types.h>
 #include "../timing.h"
-#include "../cpuid.h"
 #include "rt_ispc.h"
 
 using namespace ispc;
@@ -96,38 +95,6 @@ static void writeImage(int *idImage, float *depthImage, int width, int height,
 }
 
 
-// Make sure that the vector ISA used during compilation is supported by
-// the processor.  The ISPC_TARGET_* macro is set in the ispc-generated
-// header file that we include above.
-static void
-ensureTargetISAIsSupported() {
-#if defined(ISPC_TARGET_SSE2)
-    bool isaSupported = CPUSupportsSSE2();
-    const char *target = "SSE2";
-#elif defined(ISPC_TARGET_SSE4)
-    bool isaSupported = CPUSupportsSSE4();
-    const char *target = "SSE4";
-#elif defined(ISPC_TARGET_AVX)
-    bool isaSupported = CPUSupportsAVX();
-    const char *target = "AVX";
-#else
-#error "Unknown ISPC_TARGET_* value"
-#endif
-    if (!isaSupported) {
-        fprintf(stderr, "***\n*** Error: the ispc-compiled code uses the %s instruction "
-                "set, which isn't\n***        supported by this computer's CPU!\n", target);
-        fprintf(stderr, "***\n***        Please modify the "
-#ifdef _MSC_VER
-                "MSVC project file "
-#else
-                "Makefile "
-#endif
-                "to select another target (e.g. sse2)\n***\n");
-        exit(1);
-    }
-}
-
-
 static void usage() {
     fprintf(stderr, "rt [--scale=<factor>] <scene name base>\n");
     exit(1);
@@ -151,8 +118,6 @@ int main(int argc, char *argv[]) {
     if (filename == NULL)
         usage();
 
-    ensureTargetISAIsSupported();
-
 #define READ(var, n)                                            \
     if (fread(&(var), sizeof(var), n, f) != (unsigned int)n) {  \
         fprintf(stderr, "Unexpected EOF reading scene file\n"); \