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-rw-r--r--test/Unit/floatdisf_test.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/test/Unit/floatdisf_test.c b/test/Unit/floatdisf_test.c
new file mode 100644
index 000000000..91e098daf
--- /dev/null
+++ b/test/Unit/floatdisf_test.c
@@ -0,0 +1,95 @@
+//===-- floatdisf_test.c - Test __floatdisf -------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __floatdisf for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+#include <float.h>
+#include <stdio.h>
+
+// Returns: convert a to a float, rounding toward even.
+
+// Assumption: float is a IEEE 32 bit floating point type
+// di_int is a 64 bit integral type
+
+// seee eeee emmm mmmm mmmm mmmm mmmm mmmm
+
+float __floatdisf(di_int a);
+
+int test__floatdisf(di_int a, float expected)
+{
+ float x = __floatdisf(a);
+ if (x != expected)
+ printf("error in __floatdisf(%llX) = %a, expected %a\n",
+ a, x, expected);
+ return x != expected;
+}
+
+char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
+char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0};
+char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};
+
+int main()
+{
+ if (test__floatdisf(0, 0.0F))
+ return 1;
+
+ if (test__floatdisf(1, 1.0F))
+ return 1;
+ if (test__floatdisf(2, 2.0F))
+ return 1;
+ if (test__floatdisf(-1, -1.0F))
+ return 1;
+ if (test__floatdisf(-2, -2.0F))
+ return 1;
+
+ if (test__floatdisf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62F))
+ return 1;
+ if (test__floatdisf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62F))
+ return 1;
+
+ if (test__floatdisf(0x8000008000000000LL, -0x1.FFFFFEp+62F))
+ return 1;
+ if (test__floatdisf(0x8000010000000000LL, -0x1.FFFFFCp+62F))
+ return 1;
+
+ if (test__floatdisf(0x8000000000000000LL, -0x1.000000p+63F))
+ return 1;
+ if (test__floatdisf(0x8000000000000001LL, -0x1.000000p+63F))
+ return 1;
+
+ if (test__floatdisf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50F))
+ return 1;
+
+ if (test__floatdisf(0x0007FB72EA000000LL, 0x1.FEDCBAp+50F))
+ return 1;
+ if (test__floatdisf(0x0007FB72EB000000LL, 0x1.FEDCBAp+50F))
+ return 1;
+ if (test__floatdisf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAp+50F))
+ return 1;
+ if (test__floatdisf(0x0007FB72EC000000LL, 0x1.FEDCBCp+50F))
+ return 1;
+ if (test__floatdisf(0x0007FB72E8000001LL, 0x1.FEDCBAp+50F))
+ return 1;
+
+ if (test__floatdisf(0x0007FB72E6000000LL, 0x1.FEDCBAp+50F))
+ return 1;
+ if (test__floatdisf(0x0007FB72E7000000LL, 0x1.FEDCBAp+50F))
+ return 1;
+ if (test__floatdisf(0x0007FB72E7FFFFFFLL, 0x1.FEDCBAp+50F))
+ return 1;
+ if (test__floatdisf(0x0007FB72E4000001LL, 0x1.FEDCBAp+50F))
+ return 1;
+ if (test__floatdisf(0x0007FB72E4000000LL, 0x1.FEDCB8p+50F))
+ return 1;
+
+ return 0;
+}