R600: Add support for ISD::FROUND

NOTE: This is a candidate for the 3.4 branch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195878 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/R600/llvm.round.ll

@@ -0,0 +1,41 @@
+; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s --check-prefix=R600 --check-prefix=FUNC
+
+; FUNC-LABEL: @f32
+; R600: FRACT
+; R600-DAG: ADD
+; R600-DAG: CEIL
+; R600-DAG: FLOOR
+; R600: CNDGE
+define void @f32(float addrspace(1)* %out, float %in) {
+entry:
+  %0 = call float @llvm.round.f32(float %in)
+  store float %0, float addrspace(1)* %out
+  ret void
+}
+
+; The vector tests are really difficult to verify, since it can be hard to
+; predict how the scheduler will order the instructions.  We already have
+; a test for the scalar case, so the vector tests just check that the
+; compiler doesn't crash.
+
+; FUNC-LABEL: v2f32
+; R600: CF_END
+define void @v2f32(<2 x float> addrspace(1)* %out, <2 x float> %in) {
+entry:
+  %0 = call <2 x float> @llvm.round.v2f32(<2 x float> %in)
+  store <2 x float> %0, <2 x float> addrspace(1)* %out
+  ret void
+}
+
+; FUNC-LABEL: v4f32
+; R600: CF_END
+define void @v4f32(<4 x float> addrspace(1)* %out, <4 x float> %in) {
+entry:
+  %0 = call <4 x float> @llvm.round.v4f32(<4 x float> %in)
+  store <4 x float> %0, <4 x float> addrspace(1)* %out
+  ret void
+}
+
+declare float @llvm.round.f32(float)
+declare <2 x float> @llvm.round.v2f32(<2 x float>)
+declare <4 x float> @llvm.round.v4f32(<4 x float>)