add conversion functions and test cases for ARM

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@81809 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/arm/extendsfdf2vfp.S b/lib/arm/extendsfdf2vfp.S
new file mode 100644
index 0000000..024bbf0
--- /dev/null
+++ b/lib/arm/extendsfdf2vfp.S
@@ -0,0 +1,23 @@
+//===-- extendsfdf2vfp.S - Implement extendsfdf2vfp -----------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+
+//
+// extern double __extendsfdf2vfp(float a);
+//
+// Converts single precision float to double precision result.
+// Uses Darwin calling convention where a single precision parameter is 
+// passed in a GPR and a double precision result is returned in R0/R1 pair.
+//
+	.globl ___extendsfdf2vfp
+___extendsfdf2vfp:
+	fmsr	s15, r0      // load float register from R0
+	fcvtds	d7, s15      // convert single to double
+	fmrrd	r0, r1, d7   // return result in r0/r1 pair
+	bx	lr
diff --git a/lib/arm/fixdfsivfp.S b/lib/arm/fixdfsivfp.S
new file mode 100644
index 0000000..75c322d
--- /dev/null
+++ b/lib/arm/fixdfsivfp.S
@@ -0,0 +1,23 @@
+//===-- fixdfsivfp.S - Implement fixdfsivfp -----------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+
+//
+// extern int __fixdfsivfp(double a);
+//
+// Converts double precision float to a 32-bit int rounding towards zero.
+// Uses Darwin calling convention where a double precision parameter is 
+// passed in GPR register pair.
+//
+	.globl ___fixdfsivfp
+___fixdfsivfp:
+	fmdrr	d7, r0, r1    // load double register from R0/R1
+	ftosizd	s15, d7       // convert double to 32-bit int into s15
+	fmrs	r0, s15	      // move s15 to result register
+	bx	lr
diff --git a/lib/arm/fixsfsivfp.S b/lib/arm/fixsfsivfp.S
new file mode 100644
index 0000000..cd2fbe8
--- /dev/null
+++ b/lib/arm/fixsfsivfp.S
@@ -0,0 +1,23 @@
+//===-- fixsfsivfp.S - Implement fixsfsivfp -----------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+
+//
+// extern int __fixsfsivfp(float a);
+//
+// Converts single precision float to a 32-bit int rounding towards zero.
+// Uses Darwin calling convention where a single precision parameter is 
+// passed in a GPR..
+//
+	.globl ___fixsfsivfp
+___fixsfsivfp:
+	fmsr	s15, r0      // load float register from R0
+	ftosizs	s15, s15     // convert single to 32-bit int into s15
+	fmrs	r0, s15	     // move s15 to result register
+	bx	lr
diff --git a/lib/arm/fixunsdfsivfp.S b/lib/arm/fixunsdfsivfp.S
new file mode 100644
index 0000000..ab6c4df
--- /dev/null
+++ b/lib/arm/fixunsdfsivfp.S
@@ -0,0 +1,24 @@
+//===-- fixunsdfsivfp.S - Implement fixunsdfsivfp -------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+
+//
+// extern unsigned int __fixunsdfsivfp(double a);
+//
+// Converts double precision float to a 32-bit unsigned int rounding towards 
+// zero. All negative values become zero.
+// Uses Darwin calling convention where a double precision parameter is 
+// passed in GPR register pair.
+//
+	.globl ___fixunsdfsivfp
+___fixunsdfsivfp:
+	fmdrr	d7, r0, r1    // load double register from R0/R1
+	ftouizd	s15, d7       // convert double to 32-bit int into s15
+	fmrs	r0, s15	      // move s15 to result register
+	bx	lr
diff --git a/lib/arm/fixunssfsivfp.S b/lib/arm/fixunssfsivfp.S
new file mode 100644
index 0000000..c39c698
--- /dev/null
+++ b/lib/arm/fixunssfsivfp.S
@@ -0,0 +1,24 @@
+//===-- fixunssfsivfp.S - Implement fixunssfsivfp -------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+
+//
+// extern unsigned int __fixunssfsivfp(float a);
+//
+// Converts single precision float to a 32-bit unsigned int rounding towards 
+// zero. All negative values become zero.
+// Uses Darwin calling convention where a single precision parameter is 
+// passed in a GPR..
+//
+	.globl ___fixunssfsivfp
+___fixunssfsivfp:
+	fmsr	s15, r0      // load float register from R0
+	ftouizs	s15, s15     // convert single to 32-bit unsigned into s15
+	fmrs	r0, s15	     // move s15 to result register
+	bx	lr
diff --git a/lib/arm/floatsidfvfp.S b/lib/arm/floatsidfvfp.S
new file mode 100644
index 0000000..d402924
--- /dev/null
+++ b/lib/arm/floatsidfvfp.S
@@ -0,0 +1,23 @@
+//===-- floatsidfvfp.S - Implement floatsidfvfp ---------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+
+//
+// extern double __floatsidfvfp(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.
+//
+	.globl ___floatsidfvfp
+___floatsidfvfp:
+	fmsr	s15, r0		   // move int to float register s15
+	fsitod	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
diff --git a/lib/arm/floatsisfvfp.S b/lib/arm/floatsisfvfp.S
new file mode 100644
index 0000000..29e7e0d
--- /dev/null
+++ b/lib/arm/floatsisfvfp.S
@@ -0,0 +1,23 @@
+//===-- floatsisfvfp.S - Implement floatsisfvfp ---------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+
+//
+// extern float __floatsisfvfp(int a);
+//
+// Converts single precision float to a 32-bit int rounding towards zero.
+// Uses Darwin calling convention where a single precision result is 
+// return in a GPR..
+//
+	.globl ___floatsisfvfp
+___floatsisfvfp:
+	fmsr	s15, r0	     // move int to float register s15
+	fsitos	s15, s15     // convert 32-bit int in s15 to float in s15
+	fmrs	r0, s15      // move s15 to result register
+	bx	lr
diff --git a/lib/arm/floatunssidfvfp.S b/lib/arm/floatunssidfvfp.S
new file mode 100644
index 0000000..148945f
--- /dev/null
+++ b/lib/arm/floatunssidfvfp.S
@@ -0,0 +1,23 @@
+//===-- 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.
+//
+//===----------------------------------------------------------------------===//
+
+
+//
+// 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.
+//
+	.globl ___floatunssidfvfp
+___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
diff --git a/lib/arm/floatunssisfvfp.S b/lib/arm/floatunssisfvfp.S
new file mode 100644
index 0000000..c832278
--- /dev/null
+++ b/lib/arm/floatunssisfvfp.S
@@ -0,0 +1,23 @@
+//===-- floatunssisfvfp.S - Implement floatunssisfvfp ---------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+
+//
+// extern float __floatunssisfvfp(unsigned int a);
+//
+// Converts single precision float to a 32-bit int rounding towards zero.
+// Uses Darwin calling convention where a single precision result is 
+// return in a GPR..
+//
+	.globl ___floatunssisfvfp
+___floatunssisfvfp:
+	fmsr	s15, r0	     // move int to float register s15
+	fuitos 	s15, s15     // convert 32-bit int in s15 to float in s15
+	fmrs	r0, s15      // move s15 to result register
+	bx	lr
diff --git a/lib/arm/truncdfsf2vfp.S b/lib/arm/truncdfsf2vfp.S
new file mode 100644
index 0000000..2e26fdc
--- /dev/null
+++ b/lib/arm/truncdfsf2vfp.S
@@ -0,0 +1,23 @@
+//===-- truncdfsf2vfp.S - Implement truncdfsf2vfp -------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+
+//
+// extern float __truncdfsf2vfp(double a);
+//
+// Converts double precision float to signle precision result.
+// Uses Darwin calling convention where a double precision parameter is 
+// passed in a R0/R1 pair and a signle precision result is returned in R0.
+//
+	.globl ___truncdfsf2vfp
+___truncdfsf2vfp:
+	fmdrr	d7, r0, r1   // load double from r0/r1 pair
+	fcvtsd	s15, d7      // convert double to single (trucate precision)
+	fmrs	r0, s15      // return result in r0
+	bx	lr
diff --git a/test/Unit/extebdsfdf2vfp_test.c b/test/Unit/extebdsfdf2vfp_test.c
new file mode 100644
index 0000000..f2cf682
--- /dev/null
+++ b/test/Unit/extebdsfdf2vfp_test.c
@@ -0,0 +1,46 @@
+//===-- extendsfdf2vfp_test.c - Test __extendsfdf2vfp ---------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __extendsfdf2vfp for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+
+extern double __extendsfdf2vfp(float a);
+
+#if __arm__
+int test__extendsfdf2vfp(float a)
+{
+    double actual = __extendsfdf2vfp(a);
+    double expected = a;
+    if (actual != expected)
+        printf("error in test__extendsfdf2vfp(%f) = %f, expected %f\n",
+               a, actual, expected);
+    return actual != expected;
+}
+#endif
+
+int main()
+{
+#if __arm__
+    if (test__extendsfdf2vfp(0.0))
+        return 1;
+    if (test__extendsfdf2vfp(1.0))
+        return 1;
+    if (test__extendsfdf2vfp(-1.0))
+        return 1;
+    if (test__extendsfdf2vfp(3.1415926535))
+        return 1;
+#endif
+    return 0;
+}
diff --git a/test/Unit/fixdfsivfp_test.c b/test/Unit/fixdfsivfp_test.c
new file mode 100644
index 0000000..00d24fb
--- /dev/null
+++ b/test/Unit/fixdfsivfp_test.c
@@ -0,0 +1,48 @@
+//===-- fixdfsivfp_test.c - Test __fixdfsivfp -----------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __fixdfsivfp for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+
+extern int __fixdfsivfp(double a);
+
+#if __arm__
+int test__fixdfsivfp(double a)
+{
+	int actual = __fixdfsivfp(a);
+	int expected = a;
+    if (actual != expected)
+        printf("error in test__fixdfsivfp(%f) = %d, expected %d\n",
+               a, actual, expected);
+    return actual != expected;
+}
+#endif
+
+int main()
+{
+#if __arm__
+    if (test__fixdfsivfp(0.0))
+        return 1;
+    if (test__fixdfsivfp(1.0))
+        return 1;
+    if (test__fixdfsivfp(-1.0))
+        return 1;
+    if (test__fixdfsivfp(2147483647))
+        return 1;
+    if (test__fixdfsivfp(-2147483648.0))
+        return 1;
+#endif
+    return 0;
+}
diff --git a/test/Unit/fixsfsivfp_test.c b/test/Unit/fixsfsivfp_test.c
new file mode 100644
index 0000000..19d70b1
--- /dev/null
+++ b/test/Unit/fixsfsivfp_test.c
@@ -0,0 +1,50 @@
+//===-- fixsfsivfp_test.c - Test __fixsfsivfp -----------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __fixsfsivfp for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+
+extern int __fixsfsivfp(float a);
+
+#if __arm__
+int test__fixsfsivfp(float a)
+{
+	int actual = __fixsfsivfp(a);
+	int expected = a;
+    if (actual != expected)
+        printf("error in test__fixsfsivfp(%f) = %u, expected %u\n",
+               a, actual, expected);
+    return actual != expected;
+}
+#endif
+
+int main()
+{
+#if __arm__
+    if (test__fixsfsivfp(0.0))
+        return 1;
+    if (test__fixsfsivfp(1.0))
+        return 1;
+    if (test__fixsfsivfp(-1.0))
+        return 1;
+    if (test__fixsfsivfp(2147483647.0))
+        return 1;
+    if (test__fixsfsivfp(-2147483648.0))
+        return 1;
+    if (test__fixsfsivfp(65536.0))
+        return 1;
+#endif
+    return 0;
+}
diff --git a/test/Unit/fixunsdfsivfp_test.c b/test/Unit/fixunsdfsivfp_test.c
new file mode 100644
index 0000000..7c968f2
--- /dev/null
+++ b/test/Unit/fixunsdfsivfp_test.c
@@ -0,0 +1,48 @@
+//===-- fixunsdfsivfp_test.c - Test __fixunsdfsivfp -----------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __fixunsdfsivfp for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+
+extern unsigned int __fixunsdfsivfp(double a);
+
+#if __arm__
+int test__fixunsdfsivfp(double a)
+{
+    unsigned int actual = __fixunsdfsivfp(a);
+    unsigned int expected = a;
+    if (actual != expected)
+        printf("error in test__fixunsdfsivfp(%f) = %u, expected %u\n",
+               a, actual, expected);
+    return actual != expected;
+}
+#endif
+
+int main()
+{
+#if __arm__
+    if (test__fixunsdfsivfp(0.0))
+        return 1;
+    if (test__fixunsdfsivfp(1.0))
+        return 1;
+    if (test__fixunsdfsivfp(-1.0))
+        return 1;
+    if (test__fixunsdfsivfp(4294967295.0))
+        return 1;
+    if (test__fixunsdfsivfp(65536.0))
+        return 1;
+#endif
+    return 0;
+}
diff --git a/test/Unit/fixunssfsivfp_test.c b/test/Unit/fixunssfsivfp_test.c
new file mode 100644
index 0000000..9653175
--- /dev/null
+++ b/test/Unit/fixunssfsivfp_test.c
@@ -0,0 +1,48 @@
+//===-- fixunssfsivfp_test.c - Test __fixunssfsivfp -----------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __fixunssfsivfp for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+
+extern unsigned int __fixunssfsivfp(float a);
+
+#if __arm__
+int test__fixunssfsivfp(float a)
+{
+    unsigned int actual = __fixunssfsivfp(a);
+    unsigned int expected = a;
+    if (actual != expected)
+        printf("error in test__fixunssfsivfp(%f) = %u, expected %u\n",
+               a, actual, expected);
+    return actual != expected;
+}
+#endif
+
+int main()
+{
+#if __arm__
+    if (test__fixunssfsivfp(0.0))
+        return 1;
+    if (test__fixunssfsivfp(1.0))
+        return 1;
+    if (test__fixunssfsivfp(-1.0))
+        return 1;
+    if (test__fixunssfsivfp(4294967295.0))
+        return 1;
+    if (test__fixunssfsivfp(65536.0))
+        return 1;
+#endif
+    return 0;
+}
diff --git a/test/Unit/floatsidfvfp_test.c b/test/Unit/floatsidfvfp_test.c
new file mode 100644
index 0000000..956fe86
--- /dev/null
+++ b/test/Unit/floatsidfvfp_test.c
@@ -0,0 +1,48 @@
+//===-- floatsidfvfp_test.c - Test __floatsidfvfp -------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __floatsidfvfp for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+
+extern double __floatsidfvfp(int a);
+
+#if __arm__
+int test__floatsidfvfp(int a)
+{
+    double actual = __floatsidfvfp(a);
+    double expected = a;
+    if (actual != expected)
+        printf("error in test__ floatsidfvfp(%d) = %f, expected %f\n",
+               a, actual, expected);
+    return actual != expected;
+}
+#endif
+
+int main()
+{
+#if __arm__
+    if (test__floatsidfvfp(0))
+        return 1;
+    if (test__floatsidfvfp(1))
+        return 1;
+    if (test__floatsidfvfp(-1))
+        return 1;
+    if (test__floatsidfvfp(0x7FFFFFFF))
+        return 1;
+    if (test__floatsidfvfp(0x80000000))
+        return 1;
+#endif
+    return 0;
+}
diff --git a/test/Unit/floatsisfvfp_test.c b/test/Unit/floatsisfvfp_test.c
new file mode 100644
index 0000000..5642e9b
--- /dev/null
+++ b/test/Unit/floatsisfvfp_test.c
@@ -0,0 +1,48 @@
+//===-- floatsisfvfp_test.c - Test __floatsisfvfp -------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __floatsisfvfp for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+
+extern float __floatsisfvfp(int a);
+
+#if __arm__
+int test__floatsisfvfp(int a)
+{
+    float actual = __floatsisfvfp(a);
+    float expected = a;
+    if (actual != expected)
+        printf("error in test__floatsisfvfp(%d) = %f, expected %f\n",
+               a, actual, expected);
+    return actual != expected;
+}
+#endif
+
+int main()
+{
+#if __arm__
+    if (test__floatsisfvfp(0))
+        return 1;
+    if (test__floatsisfvfp(1))
+        return 1;
+    if (test__floatsisfvfp(-1))
+        return 1;
+    if (test__floatsisfvfp(0x7FFFFFFF))
+        return 1;
+    if (test__floatsisfvfp(0x80000000))
+        return 1;
+#endif
+    return 0;
+}
diff --git a/test/Unit/floatunssidfvfp_test.c b/test/Unit/floatunssidfvfp_test.c
new file mode 100644
index 0000000..be0bd07
--- /dev/null
+++ b/test/Unit/floatunssidfvfp_test.c
@@ -0,0 +1,48 @@
+//===-- floatunssidfvfp_test.c - Test __floatunssidfvfp -------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __floatunssidfvfp for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+
+extern double __floatunssidfvfp(unsigned int a);
+
+#if __arm__
+int test__floatunssidfvfp(unsigned int a)
+{
+    double actual = __floatunssidfvfp(a);
+    double expected = a;
+    if (actual != expected)
+        printf("error in test__floatunssidfvfp(%u) = %f, expected %f\n",
+               a, actual, expected);
+    return actual != expected;
+}
+#endif
+
+int main()
+{
+#if __arm__
+    if (test__floatunssidfvfp(0))
+        return 1;
+    if (test__floatunssidfvfp(1))
+        return 1;
+    if (test__floatunssidfvfp(0x7FFFFFFF))
+        return 1;
+    if (test__floatunssidfvfp(0x80000000))
+        return 1;
+    if (test__floatunssidfvfp(0xFFFFFFFF))
+        return 1;
+#endif
+    return 0;
+}
diff --git a/test/Unit/floatunssisfvfp_test.c b/test/Unit/floatunssisfvfp_test.c
new file mode 100644
index 0000000..13cee2f
--- /dev/null
+++ b/test/Unit/floatunssisfvfp_test.c
@@ -0,0 +1,48 @@
+//===-- floatunssisfvfp_test.c - Test __floatunssisfvfp -------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __floatunssisfvfp for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+
+extern float __floatunssisfvfp(unsigned int a);
+
+#if __arm__
+int test__floatunssisfvfp(unsigned int a)
+{
+    float actual = __floatunssisfvfp(a);
+    float expected = a;
+    if (actual != expected)
+        printf("error in test__floatunssisfvfp(%u) = %f, expected %f\n",
+               a, actual, expected);
+    return actual != expected;
+}
+#endif
+
+int main()
+{
+#if __arm__
+    if (test__floatunssisfvfp(0))
+        return 1;
+    if (test__floatunssisfvfp(1))
+        return 1;
+    if (test__floatunssisfvfp(0x7FFFFFFF))
+        return 1;
+    if (test__floatunssisfvfp(0x80000000))
+        return 1;
+    if (test__floatunssisfvfp(0xFFFFFFFF))
+        return 1;
+#endif
+    return 0;
+}
diff --git a/test/Unit/truncdfsf2vfp_test.c b/test/Unit/truncdfsf2vfp_test.c
new file mode 100644
index 0000000..f02b836
--- /dev/null
+++ b/test/Unit/truncdfsf2vfp_test.c
@@ -0,0 +1,48 @@
+//===-- truncdfsf2vfp_test.c - Test __truncdfsf2vfp -----------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __truncdfsf2vfp for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+
+extern float __truncdfsf2vfp(double a);
+
+#if __arm__
+int test__truncdfsf2vfp(double a)
+{
+    float actual = __truncdfsf2vfp(a);
+    float expected = a;
+    if (actual != expected)
+        printf("error in test__truncdfsf2vfp(%f) = %f, expected %f\n",
+               a, actual, expected);
+    return actual != expected;
+}
+#endif
+
+int main()
+{
+#if __arm__
+    if (test__truncdfsf2vfp(0.0))
+        return 1;
+    if (test__truncdfsf2vfp(1.0))
+        return 1;
+    if (test__truncdfsf2vfp(-1.0))
+        return 1;
+    if (test__truncdfsf2vfp(3.1415926535))
+        return 1;
+    if (test__truncdfsf2vfp(123.456))
+        return 1;
+#endif
+    return 0;
+}