Import libcompiler_rt into HEAD and add Makefiles.

Obtained from:	user/ed/compiler-rt

1 files changed, 24 insertions, 0 deletions

diff --git a/contrib/compiler-rt/lib/arm/floatunssidfvfp.S b/contrib/compiler-rt/lib/arm/floatunssidfvfp.S
new file mode 100644
index 0000000..d1bfe3a
--- /dev/null
+++ b/contrib/compiler-rt/lib/arm/floatunssidfvfp.S
@@ -0,0 +1,24 @@
+//===-- floatunssidfvfp.S - Implement floatunssidfvfp ---------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "../assembly.h"
+
+//
+// extern double __floatunssidfvfp(unsigned int a);
+//
+// Converts a 32-bit int to a double precision float.
+// Uses Darwin calling convention where a double precision result is 
+// return in GPR register pair.
+//
+	.align 2
+DEFINE_COMPILERRT_FUNCTION(__floatunssidfvfp)
+	fmsr	s15, r0		   // move int to float register s15
+	fuitod	d7, s15        // convert 32-bit int in s15 to double in d7
+	fmrrd	r0, r1, d7     // move d7 to result register pair r0/r1
+	bx	lr