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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31038 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/README-SSE.txt b/lib/Target/X86/README-SSE.txt
index a22cebf165f8dc61a0b9b0d419b1337496f96e55..2de68edad003f462366be53b601027918c33c173 100644 (file)
--- a/lib/Target/X86/README-SSE.txt
+++ b/lib/Target/X86/README-SSE.txt
@@ -28,6 +28,11 @@ Each operand of the minss is a load.  At least one should be folded!
 
 //===---------------------------------------------------------------------===//
 
+Expand libm rounding functions inline:  Significant speedups possible.
+http://gcc.gnu.org/ml/gcc-patches/2006-10/msg00909.html
+
+//===---------------------------------------------------------------------===//
+
 When compiled with unsafemath enabled, "main" should enable SSE DAZ mode and
 other fast SSE modes.