From: Jim Grosbach <grosbach@apple.com>
Date: Mon, 3 Oct 2011 21:12:43 +0000 (+0000)
Subject: ARM assembly parsing and encoding for VMRS/FMSTAT.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=5cd5ac6ad455880395e34ac647f1e962a83763a0;p=oota-llvm.git

ARM assembly parsing and encoding for VMRS/FMSTAT.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141025 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/ARM/ARMInstrFormats.td b/lib/Target/ARM/ARMInstrFormats.td
index 08a9ebdf084..220091c6198 100644
--- a/lib/Target/ARM/ARMInstrFormats.td
+++ b/lib/Target/ARM/ARMInstrFormats.td
@@ -227,6 +227,10 @@ class  tInstAlias<string Asm, dag Result, bit Emit = 0b1>
       : InstAlias<Asm, Result, Emit>, Requires<[IsThumb]>;
 class t2InstAlias<string Asm, dag Result, bit Emit = 0b1>
       : InstAlias<Asm, Result, Emit>, Requires<[IsThumb2]>;
+class VFP2InstAlias<string Asm, dag Result, bit Emit = 0b1>
+      : InstAlias<Asm, Result, Emit>, Requires<[HasVFP2]>;
+class VFP3InstAlias<string Asm, dag Result, bit Emit = 0b1>
+      : InstAlias<Asm, Result, Emit>, Requires<[HasVFP3]>;
 
 //===----------------------------------------------------------------------===//
 // ARM Instruction templates.
diff --git a/lib/Target/ARM/ARMInstrVFP.td b/lib/Target/ARM/ARMInstrVFP.td
index 76b333e7822..7115db581fe 100644
--- a/lib/Target/ARM/ARMInstrVFP.td
+++ b/lib/Target/ARM/ARMInstrVFP.td
@@ -1148,3 +1148,10 @@ def FCONSTS : VFPAI<(outs SPR:$Sd), (ins vfp_f32imm:$imm),
   let Inst{3-0}   = imm{3-0};
 }
 }
+
+//===----------------------------------------------------------------------===//
+// Assembler aliases.
+//
+
+def : VFP2InstAlias<"fmstat${p}", (FMSTAT pred:$p)>;
+
diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index 9d28a1cd092..9f69594b02a 100644
--- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -3046,6 +3046,7 @@ bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
     Error(Parser.getTok().getLoc(), "unexpected token in operand");
     return true;
   case AsmToken::Identifier: {
+    // If this is VMRS, check for the apsr_nzcv operand.
     if (!tryParseRegisterWithWriteBack(Operands))
       return false;
     int Res = tryParseShiftRegister(Operands);
@@ -3053,6 +3054,12 @@ bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
       return false;
     else if (Res == -1) // irrecoverable error
       return true;
+    if (Mnemonic == "vmrs" && Parser.getTok().getString() == "apsr_nzcv") {
+      S = Parser.getTok().getLoc();
+      Parser.Lex();
+      Operands.push_back(ARMOperand::CreateToken("apsr_nzcv", S));
+      return false;
+    }
 
     // Fall though for the Identifier case that is not a register or a
     // special name.
diff --git a/test/MC/ARM/simple-fp-encoding.s b/test/MC/ARM/simple-fp-encoding.s
index f6626d75b42..67a78c435d9 100644
--- a/test/MC/ARM/simple-fp-encoding.s
+++ b/test/MC/ARM/simple-fp-encoding.s
@@ -114,8 +114,10 @@
 @ CHECK: vnmls.f32 s1, s2, s0        @ encoding: [0x00,0x0a,0x51,0xee]
         vnmls.f32       s1, s2, s0
 
-@ FIXME: vmrs apsr_nzcv, fpscr       @ encoding: [0x10,0xfa,0xf1,0xee]
-@        vmrs    apsr_nzcv, fpscr
+@ CHECK: vmrs apsr_nzcv, fpscr       @ encoding: [0x10,0xfa,0xf1,0xee]
+@ CHECK: vmrs apsr_nzcv, fpscr       @ encoding: [0x10,0xfa,0xf1,0xee]
+        vmrs    apsr_nzcv, fpscr
+        fmstat
 
 @ CHECK: vnegne.f64 d16, d16         @ encoding: [0x60,0x0b,0xf1,0x1e]
         vnegne.f64      d16, d16