[X86] Fix mistake in comment on LowerFROUND. NFC

The code uses floor not trunc.

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 474ff4e..27ce65b 100644 (file)
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -22614,7 +22614,7 @@ SDValue X86TargetLowering::lowerFaddFsub(SDValue Op, SelectionDAG &DAG) const {
 /// ISD::FROUND is defined to round to nearest with ties rounding away from 0.
 /// This mode isn't supported in hardware on X86. But as long as we aren't
 /// compiling with trapping math, we can emulate this with
-/// floor(X + copysign(nextafter(0.5, 0.0), X)).
+/// trunc(X + copysign(nextafter(0.5, 0.0), X)).
 static SDValue LowerFROUND(SDValue Op, SelectionDAG &DAG) {
   SDValue N0 = Op.getOperand(0);
   SDLoc dl(Op);