Add support for ARM Neon VREV instructions.

Patch by Anton Korzh, with some modifications from me.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77101 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 72 insertions, 0 deletions

diff --git a/lib/Target/ARM/ARMInstrNEON.td b/lib/Target/ARM/ARMInstrNEON.td
index 2b71923..9415b40 100644
--- a/lib/Target/ARM/ARMInstrNEON.td
+++ b/lib/Target/ARM/ARMInstrNEON.td
@@ -1662,6 +1662,78 @@ def VCVTxs2fq : N2VCvtQ<0, 1, 0b000000, 0b1110, 0, 1, "vcvt.f32.s32",
 def VCVTxu2fq : N2VCvtQ<1, 1, 0b000000, 0b1110, 0, 1, "vcvt.f32.u32",
                         v4f32, v4i32, int_arm_neon_vcvtfxu2fp>;
 
+//   VREV     : Vector Reverse
+
+def vrev64_shuffle : PatFrag<(ops node:$in),
+                             (vector_shuffle node:$in, undef), [{
+  ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
+  return ARM::isVREVMask(SVOp, 64);
+}]>;
+
+def vrev32_shuffle : PatFrag<(ops node:$in),
+                             (vector_shuffle node:$in, undef), [{
+  ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
+  return ARM::isVREVMask(SVOp, 32);
+}]>;
+
+def vrev16_shuffle : PatFrag<(ops node:$in),
+                             (vector_shuffle node:$in, undef), [{
+  ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
+  return ARM::isVREVMask(SVOp, 16);
+}]>;
+
+//   VREV64   : Vector Reverse elements within 64-bit doublewords
+
+class VREV64D<bits<2> op19_18, string OpcodeStr, ValueType Ty>
+  : N2V<0b11, 0b11, op19_18, 0b00, 0b00000, 0, 0, (outs DPR:$dst),
+        (ins DPR:$src), !strconcat(OpcodeStr, "\t$dst, $src"), "",
+        [(set DPR:$dst, (Ty (vrev64_shuffle (Ty DPR:$src))))]>;
+class VREV64Q<bits<2> op19_18, string OpcodeStr, ValueType Ty>
+  : N2V<0b11, 0b11, op19_18, 0b00, 0b00000, 1, 0, (outs QPR:$dst),
+        (ins QPR:$src), !strconcat(OpcodeStr, "\t$dst, $src"), "",
+        [(set QPR:$dst, (Ty (vrev64_shuffle (Ty QPR:$src))))]>;
+
+def VREV64d8  : VREV64D<0b00, "vrev64.8", v8i8>;
+def VREV64d16 : VREV64D<0b01, "vrev64.16", v4i16>;
+def VREV64d32 : VREV64D<0b10, "vrev64.32", v2i32>;
+def VREV64df  : VREV64D<0b10, "vrev64.32", v2f32>;
+
+def VREV64q8  : VREV64Q<0b00, "vrev64.8", v16i8>;
+def VREV64q16 : VREV64Q<0b01, "vrev64.16", v8i16>;
+def VREV64q32 : VREV64Q<0b10, "vrev64.32", v4i32>;
+def VREV64qf  : VREV64Q<0b10, "vrev64.32", v4f32>;
+
+//   VREV32   : Vector Reverse elements within 32-bit words
+
+class VREV32D<bits<2> op19_18, string OpcodeStr, ValueType Ty>
+  : N2V<0b11, 0b11, op19_18, 0b00, 0b00001, 0, 0, (outs DPR:$dst),
+        (ins DPR:$src), !strconcat(OpcodeStr, "\t$dst, $src"), "",
+        [(set DPR:$dst, (Ty (vrev32_shuffle (Ty DPR:$src))))]>;
+class VREV32Q<bits<2> op19_18, string OpcodeStr, ValueType Ty>
+  : N2V<0b11, 0b11, op19_18, 0b00, 0b00001, 1, 0, (outs QPR:$dst),
+        (ins QPR:$src), !strconcat(OpcodeStr, "\t$dst, $src"), "",
+        [(set QPR:$dst, (Ty (vrev32_shuffle (Ty QPR:$src))))]>;
+
+def VREV32d8  : VREV32D<0b00, "vrev32.8", v8i8>;
+def VREV32d16 : VREV32D<0b01, "vrev32.16", v4i16>;
+
+def VREV32q8  : VREV32Q<0b00, "vrev32.8", v16i8>;
+def VREV32q16 : VREV32Q<0b01, "vrev32.16", v8i16>;
+
+//   VREV16   : Vector Reverse elements within 16-bit halfwords
+
+class VREV16D<bits<2> op19_18, string OpcodeStr, ValueType Ty>
+  : N2V<0b11, 0b11, op19_18, 0b00, 0b00010, 0, 0, (outs DPR:$dst),
+        (ins DPR:$src), !strconcat(OpcodeStr, "\t$dst, $src"), "",
+        [(set DPR:$dst, (Ty (vrev16_shuffle (Ty DPR:$src))))]>;
+class VREV16Q<bits<2> op19_18, string OpcodeStr, ValueType Ty>
+  : N2V<0b11, 0b11, op19_18, 0b00, 0b00010, 1, 0, (outs QPR:$dst),
+        (ins QPR:$src), !strconcat(OpcodeStr, "\t$dst, $src"), "",
+        [(set QPR:$dst, (Ty (vrev16_shuffle (Ty QPR:$src))))]>;
+
+def VREV16d8  : VREV16D<0b00, "vrev16.8", v8i8>;
+def VREV16q8  : VREV16Q<0b00, "vrev16.8", v16i8>;
+
 //===----------------------------------------------------------------------===//
 // Non-Instruction Patterns
 //===----------------------------------------------------------------------===//