[ARM] Add new system registers to ARMv8-M Baseline/Mainline

This patch was originally committed as r257884, but was reverted due to windows
failures. The cause of these failures has been fixed under r258677, hence
re-committing the original patch.

llvm-svn: 258682

1 files changed, 26 insertions, 0 deletions

diff --git a/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index 3fe00a6da80..1b775045141 100644
--- a/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -272,6 +272,12 @@ class ARMAsmParser : public MCTargetAsmParser {
   bool hasV8MBaseline() const {
     return getSTI().getFeatureBits()[ARM::HasV8MBaselineOps];
   }
+  bool hasV8MMainline() const {
+    return getSTI().getFeatureBits()[ARM::HasV8MMainlineOps];
+  }
+  bool has8MSecExt() const {
+    return getSTI().getFeatureBits()[ARM::Feature8MSecExt];
+  }
   bool hasARM() const {
     return !getSTI().getFeatureBits()[ARM::FeatureNoARM];
   }
@@ -4008,6 +4014,18 @@ ARMAsmParser::parseMSRMaskOperand(OperandVector &Operands) {
       .Case("basepri_max", 0x812)
       .Case("faultmask", 0x813)
       .Case("control", 0x814)
+      .Case("msplim", 0x80a)
+      .Case("psplim", 0x80b)
+      .Case("msp_ns", 0x888)
+      .Case("psp_ns", 0x889)
+      .Case("msplim_ns", 0x88a)
+      .Case("psplim_ns", 0x88b)
+      .Case("primask_ns", 0x890)
+      .Case("basepri_ns", 0x891)
+      .Case("basepri_max_ns", 0x892)
+      .Case("faultmask_ns", 0x893)
+      .Case("control_ns", 0x894)
+      .Case("sp_ns", 0x898)
       .Default(~0U);
 
     if (FlagsVal == ~0U)
@@ -4022,6 +4040,14 @@ ARMAsmParser::parseMSRMaskOperand(OperandVector &Operands) {
       // basepri, basepri_max and faultmask only valid for V7m.
       return MatchOperand_NoMatch;
 
+    if (!has8MSecExt() && (FlagsVal == 0x80a || FlagsVal == 0x80b ||
+                             (FlagsVal > 0x814 && FlagsVal < 0xc00)))
+      return MatchOperand_NoMatch;
+
+    if (!hasV8MMainline() && (FlagsVal == 0x88a || FlagsVal == 0x88b ||
+                              (FlagsVal > 0x890 && FlagsVal <= 0x893)))
+      return MatchOperand_NoMatch;
+
     Parser.Lex(); // Eat identifier token.
     Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
     return MatchOperand_Success;