1 files changed, 90 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/NVPTX/NVPTXutil.cpp b/contrib/llvm/lib/Target/NVPTX/NVPTXutil.cpp
new file mode 100644
index 000000000000..5f074b33a2d4
--- /dev/null
+++ b/contrib/llvm/lib/Target/NVPTX/NVPTXutil.cpp
@@ -0,0 +1,90 @@
+//===-- NVPTXutil.cpp - Functions exported to CodeGen --*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the functions that can be used in CodeGen.
+//
+//===----------------------------------------------------------------------===//
+
+#include "NVPTXutil.h"
+#include "NVPTX.h"
+
+using namespace llvm;
+
+namespace llvm {
+
+bool isParamLoad(const MachineInstr *MI) {
+  if ((MI->getOpcode() != NVPTX::LD_i32_avar) &&
+      (MI->getOpcode() != NVPTX::LD_i64_avar))
+    return false;
+  if (MI->getOperand(2).isImm() == false)
+    return false;
+  if (MI->getOperand(2).getImm() != NVPTX::PTXLdStInstCode::PARAM)
+    return false;
+  return true;
+}
+
+#define DATA_MASK 0x7f
+#define DIGIT_WIDTH 7
+#define MORE_BYTES 0x80
+
+static int encode_leb128(uint64_t val, int *nbytes, char *space, int splen) {
+  char *a;
+  char *end = space + splen;
+
+  a = space;
+  do {
+    unsigned char uc;
+
+    if (a >= end)
+      return 1;
+    uc = val & DATA_MASK;
+    val >>= DIGIT_WIDTH;
+    if (val != 0)
+      uc |= MORE_BYTES;
+    *a = uc;
+    a++;
+  } while (val);
+  *nbytes = a - space;
+  return 0;
+}
+
+#undef DATA_MASK
+#undef DIGIT_WIDTH
+#undef MORE_BYTES
+
+uint64_t encode_leb128(const char *str) {
+  union {
+    uint64_t x;
+    char a[8];
+  } temp64;
+
+  temp64.x = 0;
+
+  for (unsigned i = 0, e = strlen(str); i != e; ++i)
+    temp64.a[i] = str[e - 1 - i];
+
+  char encoded[16];
+  int nbytes;
+
+  int retval = encode_leb128(temp64.x, &nbytes, encoded, 16);
+
+  (void) retval;
+  assert(retval == 0 && "Encoding to leb128 failed");
+
+  assert(nbytes <= 8 &&
+         "Cannot support register names with leb128 encoding > 8 bytes");
+
+  temp64.x = 0;
+  for (int i = 0; i < nbytes; ++i)
+    temp64.a[i] = encoded[i];
+
+  return temp64.x;
+}
+
+} // end namespace llvm