Refs: A8-598.

Leave Inst{11-8}, which represents the starting byte index of the extracted
result in the concatenation of the operands and is left unspecified.

Patch by Johnny Chen.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84572 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 24 insertions, 10 deletions

diff --git a/lib/Target/ARM/ARMInstrFormats.td b/lib/Target/ARM/ARMInstrFormats.td
index c60d16f0e2..15f8dff8fb 100644
--- a/lib/Target/ARM/ARMInstrFormats.td
+++ b/lib/Target/ARM/ARMInstrFormats.td
@@ -1290,6 +1290,20 @@ class N3V<bit op24, bit op23, bits<2> op21_20, bits<4> op11_8, bit op6, bit op4,
   let Inst{4} = op4;
 }
 
+// NEON 3 vector register with immediate.  This is only used for VEXT where
+// op11_8 represents the starting byte index of the extracted result in the
+// concatenation of the operands and is left unspecified.
+class N3VImm<bit op24, bit op23, bits<2> op21_20, bit op6, bit op4,
+             dag oops, dag iops, InstrItinClass itin,
+             string asm, string cstr, list<dag> pattern>
+  : NDataI<oops, iops, itin, asm, cstr, pattern> {
+  let Inst{24} = op24;
+  let Inst{23} = op23;
+  let Inst{21-20} = op21_20;
+  let Inst{6} = op6;
+  let Inst{4} = op4;
+}
+
 // NEON VMOVs between scalar and core registers.
 class NVLaneOp<bits<8> opcod1, bits<4> opcod2, bits<2> opcod3,
                dag oops, dag iops, Format f, InstrItinClass itin,
diff --git a/lib/Target/ARM/ARMInstrNEON.td b/lib/Target/ARM/ARMInstrNEON.td
index 1fb86acc7a..461028fe2c 100644
--- a/lib/Target/ARM/ARMInstrNEON.td
+++ b/lib/Target/ARM/ARMInstrNEON.td
@@ -2670,18 +2670,18 @@ def VREV16q8  : VREV16Q<0b00, "vrev16.8", v16i8>;
 //   VEXT     : Vector Extract
 
 class VEXTd<string OpcodeStr, ValueType Ty>
-  : N3V<0,1,0b11,0b0000,0,0, (outs DPR:$dst),
-        (ins DPR:$lhs, DPR:$rhs, i32imm:$index), IIC_VEXTD,
-        !strconcat(OpcodeStr, "\t$dst, $lhs, $rhs, $index"), "",
-        [(set DPR:$dst, (Ty (NEONvext (Ty DPR:$lhs),
-                                      (Ty DPR:$rhs), imm:$index)))]>;
+  : N3VImm<0,1,0b11,0,0, (outs DPR:$dst),
+           (ins DPR:$lhs, DPR:$rhs, i32imm:$index), IIC_VEXTD,
+           !strconcat(OpcodeStr, "\t$dst, $lhs, $rhs, $index"), "",
+           [(set DPR:$dst, (Ty (NEONvext (Ty DPR:$lhs),
+                                         (Ty DPR:$rhs), imm:$index)))]>;
 
 class VEXTq<string OpcodeStr, ValueType Ty>
-  : N3V<0,1,0b11,0b0000,1,0, (outs QPR:$dst),
-        (ins QPR:$lhs, QPR:$rhs, i32imm:$index), IIC_VEXTQ,
-        !strconcat(OpcodeStr, "\t$dst, $lhs, $rhs, $index"), "",
-        [(set QPR:$dst, (Ty (NEONvext (Ty QPR:$lhs),
-                                      (Ty QPR:$rhs), imm:$index)))]>;
+  : N3VImm<0,1,0b11,1,0, (outs QPR:$dst),
+           (ins QPR:$lhs, QPR:$rhs, i32imm:$index), IIC_VEXTQ,
+           !strconcat(OpcodeStr, "\t$dst, $lhs, $rhs, $index"), "",
+           [(set QPR:$dst, (Ty (NEONvext (Ty QPR:$lhs),
+                                         (Ty QPR:$rhs), imm:$index)))]>;
 
 def VEXTd8  : VEXTd<"vext.8",  v8i8>;
 def VEXTd16 : VEXTd<"vext.16", v4i16>;