Add soft float support for a bunch more operations. Original

patch by Richard Osborne, tweaked and extended by your humble
servant.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59464 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/XCore/log2.ll

@@ -0,0 +1,16 @@
+; RUN: llvm-as < %s | llc -march=xcore > %t1.s
+; RUN: grep "bl log2f" %t1.s | count 1
+; RUN: grep "bl log2" %t1.s | count 2
+declare double @llvm.log2.f64(double)
+
+define double @test(double %F) {
+        %result = call double @llvm.log2.f64(double %F)
+	ret double %result
+}
+
+declare float @llvm.log2.f32(float)
+
+define float @testf(float %F) {
+        %result = call float @llvm.log2.f32(float %F)
+	ret float %result
+}