ARM assembly parsing and encoding for VMOV/VMVN/VORR/VBIC.i32.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142321 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 59 insertions, 0 deletions

diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index 11b6574..752d351 100644
--- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -935,6 +935,37 @@ public:
     return (Value >= 0 && Value < 256) || (Value >= 0x0100 && Value <= 0xff00);
   }
 
+  bool isNEONi32splat() const {
+    if (Kind != k_Immediate)
+      return false;
+    const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
+    // Must be a constant.
+    if (!CE) return false;
+    int64_t Value = CE->getValue();
+    // i32 value with set bits only in one byte X000, 0X00, 00X0, or 000X.
+    return (Value >= 0 && Value < 256) ||
+      (Value >= 0x0100 && Value <= 0xff00) ||
+      (Value >= 0x010000 && Value <= 0xff0000) ||
+      (Value >= 0x01000000 && Value <= 0xff000000);
+  }
+
+  bool isNEONi32vmov() const {
+    if (Kind != k_Immediate)
+      return false;
+    const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
+    // Must be a constant.
+    if (!CE) return false;
+    int64_t Value = CE->getValue();
+    // i32 value with set bits only in one byte X000, 0X00, 00X0, or 000X,
+    // for VMOV/VMVN only, 00Xf or 0Xff are also accepted.
+    return (Value >= 0 && Value < 256) ||
+      (Value >= 0x0100 && Value <= 0xff00) ||
+      (Value >= 0x010000 && Value <= 0xff0000) ||
+      (Value >= 0x01000000 && Value <= 0xff000000) ||
+      (Value >= 0x01ff && Value <= 0xffff && (Value & 0xff) == 0xff) ||
+      (Value >= 0x01ffff && Value <= 0xffffff && (Value & 0xffff) == 0xffff);
+  }
+
   void addExpr(MCInst &Inst, const MCExpr *Expr) const {
     // Add as immediates when possible.  Null MCExpr = 0.
     if (Expr == 0)
@@ -1477,6 +1508,34 @@ public:
     Inst.addOperand(MCOperand::CreateImm(Value));
   }
 
+  void addNEONi32splatOperands(MCInst &Inst, unsigned N) const {
+    assert(N == 1 && "Invalid number of operands!");
+    // The immediate encodes the type of constant as well as the value.
+    const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
+    unsigned Value = CE->getValue();
+    if (Value >= 256 && Value <= 0xff00)
+      Value = (Value >> 8) | 0x200;
+    else if (Value > 0xffff && Value <= 0xff0000)
+      Value = (Value >> 16) | 0x400;
+    else if (Value > 0xffffff)
+      Value = (Value >> 24) | 0x600;
+    Inst.addOperand(MCOperand::CreateImm(Value));
+  }
+
+  void addNEONi32vmovOperands(MCInst &Inst, unsigned N) const {
+    assert(N == 1 && "Invalid number of operands!");
+    // The immediate encodes the type of constant as well as the value.
+    const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
+    unsigned Value = CE->getValue();
+    if (Value >= 256 && Value <= 0xffff)
+      Value = (Value >> 8) | ((Value & 0xff) ? 0xc00 : 0x200);
+    else if (Value > 0xffff && Value <= 0xffffff)
+      Value = (Value >> 16) | ((Value & 0xff) ? 0xd00 : 0x400);
+    else if (Value > 0xffffff)
+      Value = (Value >> 24) | 0x600;
+    Inst.addOperand(MCOperand::CreateImm(Value));
+  }
+
   virtual void print(raw_ostream &OS) const;
 
   static ARMOperand *CreateITMask(unsigned Mask, SMLoc S) {