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Index: openjdk/hotspot/src/share/vm/shark/sharkCompiler.cpp
===================================================================
--- openjdk.orig/hotspot/src/share/vm/shark/sharkCompiler.cpp 2010-07-14 16:42:48.412103129 +0200
+++ openjdk/hotspot/src/share/vm/shark/sharkCompiler.cpp 2010-07-14 16:50:51.680282178 +0200
@@ -32,6 +32,96 @@
#if SHARK_LLVM_VERSION >= 27
namespace {
+
+#if defined(__arm__) && defined(__linux__)
+#include <fcntl.h>
+#include <linux/auxvec.h>
+#include <asm/hwcap.h>
+#define VECBUFF_SIZE 32
+
+bool TestARMLinuxHWCAP(int feature) {
+ int fd;
+ unsigned vecs[VECBUFF_SIZE];
+ unsigned *p;
+ int i, n;
+ int rc;
+
+ rc = 0;
+ fd = open("/proc/self/auxv", O_RDONLY);
+ if (fd < 0) return 0;
+ do {
+ n = read(fd, vecs, VECBUFF_SIZE * sizeof(unsigned));
+ p = vecs;
+ i = n/8;
+ while (--i >=0) {
+ unsigned tag = *p++;
+ unsigned value = *p++;
+ if (tag == 0) goto fini;
+ if(tag == AT_HWCAP && (value & feature)) {
+ rc = 1;
+ goto fini;
+ }
+ }
+ } while (n == VECBUFF_SIZE * sizeof(unsigned));
+fini:
+ close(fd);
+ return rc;
+}
+
+char* TestARMLinuxAT(int auxvec) {
+ int fd;
+ unsigned vecs[VECBUFF_SIZE];
+ unsigned *p;
+ int i, n;
+ char* rc;
+
+ rc = 0;
+ fd = open("/proc/self/auxv", O_RDONLY);
+ if (fd < 0) return 0;
+ do {
+ n = read(fd, vecs, VECBUFF_SIZE * sizeof(unsigned));
+ p = vecs;
+ i = n/8;
+ while (--i >=0) {
+ unsigned tag = *p++;
+ unsigned value = *p++;
+ if (tag == 0) goto fini;
+ if(tag == (unsigned) auxvec ) {
+ rc = (char*)value;
+ goto fini;
+ }
+ }
+ } while (n == VECBUFF_SIZE * sizeof(unsigned));
+fini:
+ close(fd);
+ return rc;
+}
+
+bool getARMHostCPUFeatures(StringMap<bool> &Features) {
+ // FIXME LLVM PR6561 // Features["neon"]=TestARMLinuxHWCAP(HWCAP_NEON);
+ Features["thumb2"]=TestARMLinuxHWCAP(HWCAP_THUMBEE);
+ Features["vfp2"]=TestARMLinuxHWCAP(HWCAP_VFP);
+
+ std::string testArchKey(TestARMLinuxAT(AT_PLATFORM));
+
+ StringMap<std::string> archLinuxToLLVMMap;
+ archLinuxToLLVMMap["v4l"]="v4t";
+ archLinuxToLLVMMap["v5l"]="v5t";
+ archLinuxToLLVMMap["v6l"]="v6";
+ // FIXME change this from v6 to v7a when LLVM PR7048 have been fixed
+ archLinuxToLLVMMap["v7l"]="v6";
+
+ llvm::StringMapIterator<std::string> resultIterator(archLinuxToLLVMMap.find(
+ testArchKey));
+ if(resultIterator->first()) {
+ std::string arch(resultIterator->second);
+ Features[arch]=true;
+ }
+
+ return true;
+}
+#endif
+
cl::opt<std::string>
MCPU("mcpu");
@@ -64,7 +154,11 @@
#if SHARK_LLVM_VERSION >= 27
// Finetune LLVM for the current host CPU.
StringMap<bool> Features;
+#if defined(__arm__) && defined(__linux__)
+ bool gotCpuFeatures = getARMHostCPUFeatures(Features);
+#else
bool gotCpuFeatures = llvm::sys::getHostCPUFeatures(Features);
+#endif
std::string cpu("-mcpu=" + llvm::sys::getHostCPUName());
std::vector<const char*> args;
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