vendor/llvm/llvm-release_34-r197841

1 files changed, 57 insertions, 8 deletions

diff --git a/lib/MC/MCInstPrinter.cpp b/lib/MC/MCInstPrinter.cpp
index 73f30ffb52a02..ba71245d0184f 100644
--- a/lib/MC/MCInstPrinter.cpp
+++ b/lib/MC/MCInstPrinter.cpp
@@ -31,9 +31,13 @@ void MCInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
 
 void MCInstPrinter::printAnnotation(raw_ostream &OS, StringRef Annot) {
   if (!Annot.empty()) {
-    if (CommentStream)
+    if (CommentStream) {
       (*CommentStream) << Annot;
-    else
+      // By definition (see MCInstPrinter.h), CommentStream must end with
+      // a newline after each comment.
+      if (Annot.back() != '\n')
+        (*CommentStream) << '\n';
+    } else
       OS << " " << MAI.getCommentString() << " " << Annot;
   }
 }
@@ -52,10 +56,55 @@ StringRef MCInstPrinter::markup(StringRef a, StringRef b) const {
     return b;
 }
 
-/// Utility function to print immediates in decimal or hex.
-format_object1<int64_t> MCInstPrinter::formatImm(const int64_t Value) const {
-  if (getPrintImmHex())
-    return format("0x%" PRIx64, Value);
-  else
-    return format("%" PRId64, Value);
+// For asm-style hex (e.g. 0ffh) the first digit always has to be a number.
+static bool needsLeadingZero(uint64_t Value)
+{
+  while(Value)
+  {
+    uint64_t digit = (Value >> 60) & 0xf;
+    if (digit != 0)
+      return (digit >= 0xa);
+    Value <<= 4;
+  }
+  return false;
+}
+
+format_object1<int64_t> MCInstPrinter::formatDec(const int64_t Value) const {
+  return format("%" PRId64, Value);
+}
+
+format_object1<int64_t> MCInstPrinter::formatHex(const int64_t Value) const {
+  switch(PrintHexStyle) {
+  case HexStyle::C:
+    if (Value < 0)
+      return format("-0x%" PRIx64, -Value);
+    else
+      return format("0x%" PRIx64, Value);
+  case HexStyle::Asm:
+    if (Value < 0) {
+      if (needsLeadingZero((uint64_t)(-Value)))
+        return format("-0%" PRIx64 "h", -Value);
+      else
+        return format("-%" PRIx64 "h", -Value);
+    } else {
+      if (needsLeadingZero((uint64_t)(Value)))
+        return format("0%" PRIx64 "h", Value);
+      else
+        return format("%" PRIx64 "h", Value);
+    }
+  }
+  llvm_unreachable("unsupported print style");
+}
+
+format_object1<uint64_t> MCInstPrinter::formatHex(const uint64_t Value) const {
+  switch(PrintHexStyle) {
+  case HexStyle::C:
+     return format("0x%" PRIx64, Value);
+  case HexStyle::Asm:
+    if (needsLeadingZero(Value))
+      return format("0%" PRIx64 "h", Value);
+    else
+      return format("%" PRIx64 "h", Value);
+  }
+  llvm_unreachable("unsupported print style");
 }