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-rw-r--r--lib/arm/adddf3vfp.S24
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diff --git a/lib/arm/adddf3vfp.S b/lib/arm/adddf3vfp.S
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+//===-- adddf3vfp.S - Implement adddf3vfp ---------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "../assembly.h"
+
+//
+// double __adddf3vfp(double a, double b) { return a + b; }
+//
+// Adds two double precision floating point numbers using the Darwin
+// calling convention where double arguments are passsed in GPR pairs
+//
+ .align 2
+DEFINE_COMPILERRT_FUNCTION(__adddf3vfp)
+ fmdrr d6, r0, r1 // move first param from r0/r1 pair into d6
+ fmdrr d7, r2, r3 // move second param from r2/r3 pair into d7
+ faddd d6, d6, d7
+ fmrrd r0, r1, d6 // move result back to r0/r1 pair
+ bx lr