Add a comment to describe letters used in multiclass name suffixes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83257 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMInstrNEON.td b/lib/Target/ARM/ARMInstrNEON.td
index 9fb6b41ee90a674243f562522babb3ae835bb2dc..b9dbd6f38463b5696218338de0f464a5c1d686c4 100644 (file)
--- a/lib/Target/ARM/ARMInstrNEON.td
+++ b/lib/Target/ARM/ARMInstrNEON.td
@@ -935,6 +935,12 @@ class N2VCvtQ<bit op24, bit op23, bits<6> op21_16, bits<4> op11_8, bit op7,
 // Multiclasses
 //===----------------------------------------------------------------------===//
 
+// Abbreviations used in multiclass suffixes:
+//   Q = quarter int (8 bit) elements
+//   H = half int (16 bit) elements
+//   S = single int (32 bit) elements
+//   D = double int (64 bit) elements
+
 // Neon 3-register vector operations.
 
 // First with only element sizes of 8, 16 and 32 bits: