add comparison functions for ARM
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@81597 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/arm/nedf2vfp.S b/lib/arm/nedf2vfp.S
new file mode 100644
index 0000000..8cf4dc2
--- /dev/null
+++ b/lib/arm/nedf2vfp.S
@@ -0,0 +1,26 @@
+//===-- nedf2vfp.S - Implement nedf2vfp -----------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+
+//
+// extern double __nedf2vfp(double a, double b);
+//
+// Returns zero if a and b are unequal and neither is NaN.
+// Uses Darwin calling convention where double precision arguments are passsed
+// like in GPR pairs.
+//
+ .globl ___nedf2vfp
+___nedf2vfp:
+ fmdrr d6, r0, r1 // load r0/r1 pair in double register
+ fmdrr d7, r2, r3 // load r2/r3 pair in double register
+ fcmpd d6, d7
+ fmstat
+ movne r0, #1 // set result register to 0 if unequal
+ moveq r0, #0
+ bx lr