Implement necessary bits for flt_rounds gcc builtin.

Codegen bits and llvm-gcc support will follow.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44182 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 13 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h
index 56f85f4b74..5407de5b49 100644
--- a/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -390,6 +390,14 @@ namespace ISD {
     // precision down to the specified precision (currently always 64->32).
     FP_ROUND,
 
+    // FLT_ROUNDS - Returns current rounding mode:
+    // -1 Undefined
+    //  0 Round to 0
+    //  1 Round to nearest
+    //  2 Round to +inf
+    //  3 Round to -inf
+    FLT_ROUNDS,
+
     // FP_ROUND_INREG - This operator takes a floating point register, and
     // rounds it to a floating point value.  It then promotes it and returns it
     // in a register of the same size.  This operation effectively just discards
diff --git a/include/llvm/Intrinsics.td b/include/llvm/Intrinsics.td
index 4ede06d408..08d82588aa 100644
--- a/include/llvm/Intrinsics.td
+++ b/include/llvm/Intrinsics.td
@@ -262,6 +262,11 @@ def int_init_trampoline : Intrinsic<[llvm_ptr_ty, llvm_ptr_ty, llvm_ptr_ty,
                                      llvm_ptr_ty], []>,
                           GCCBuiltin<"__builtin_init_trampoline">;
 
+//===-------------------------- Other Intrinsics --------------------------===//
+//
+def int_flt_rounds : Intrinsic<[llvm_i32_ty]>,
+                     GCCBuiltin<"__builtin_flt_rounds">;
+
 //===----------------------------------------------------------------------===//
 // Target-specific intrinsics
 //===----------------------------------------------------------------------===//