Implement __divtf3 for IEEE quad precision.

Patch by: GuanHong Liu
Differential Revision: http://reviews.llvm.org/D2800


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@209886 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 94 insertions, 0 deletions

diff --git a/test/builtins/Unit/divtf3_test.c b/test/builtins/Unit/divtf3_test.c
new file mode 100644
index 000000000..dad631cc4
--- /dev/null
+++ b/test/builtins/Unit/divtf3_test.c
@@ -0,0 +1,94 @@
+//===--------------- divtf3_test.c - Test __divtf3 ------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __divtf3 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include <stdio.h>
+
+#if __LDBL_MANT_DIG__ == 113
+
+#include "fp_test.h"
+
+// Returns: a / b
+long double __divtf3(long double a, long double b);
+
+int test__divtf3(long double a, long double b,
+                 uint64_t expectedHi, uint64_t expectedLo)
+{
+    long double x = __divtf3(a, b);
+    int ret = compareResultLD(x, expectedHi, expectedLo);
+
+    if (ret){
+        printf("error in test__divtf3(%.20Lf, %.20Lf) = %.20Lf, "
+               "expected %.20Lf\n", a, b, x,
+               fromRep128(expectedHi, expectedLo));
+    }
+    return ret;
+}
+
+char assumption_1[sizeof(long double) * CHAR_BIT == 128] = {0};
+
+#endif
+
+int main()
+{
+#if __LDBL_MANT_DIG__ == 113
+    // qNaN / any = qNaN
+    if (test__divtf3(makeQNaN128(),
+                     0x1.23456789abcdefp+5L,
+                     UINT64_C(0x7fff800000000000),
+                     UINT64_C(0x0)))
+        return 1;
+    // NaN / any = NaN
+    if (test__divtf3(makeNaN128(UINT64_C(0x800030000000)),
+                     0x1.23456789abcdefp+5L,
+                     UINT64_C(0x7fff800000000000),
+                     UINT64_C(0x0)))
+        return 1;
+    // inf / any = inf
+    if (test__divtf3(makeInf128(),
+                     0x1.23456789abcdefp+5L,
+                     UINT64_C(0x7fff000000000000),
+                     UINT64_C(0x0)))
+        return 1;
+    // any / any
+    if (test__divtf3(0x1.a23b45362464523375893ab4cdefp+5L,
+                     0x1.eedcbaba3a94546558237654321fp-1L,
+                     UINT64_C(0x4004b0b72924d407),
+                     UINT64_C(0x0717e84356c6eba2)))
+        return 1;
+    if (test__divtf3(0x1.a2b34c56d745382f9abf2c3dfeffp-50L,
+                     0x1.ed2c3ba15935332532287654321fp-9L,
+                     UINT64_C(0x3fd5b2af3f828c9b),
+                     UINT64_C(0x40e51f64cde8b1f2)))
+        return 15;
+    if (test__divtf3(0x1.2345f6aaaa786555f42432abcdefp+456L,
+                     0x1.edacbba9874f765463544dd3621fp+6400L,
+                     UINT64_C(0x28c62e15dc464466),
+                     UINT64_C(0xb5a07586348557ac)))
+        return 1;
+    if (test__divtf3(0x1.2d3456f789ba6322bc665544edefp-234L,
+                     0x1.eddcdba39f3c8b7a36564354321fp-4455L,
+                     UINT64_C(0x507b38442b539266),
+                     UINT64_C(0x22ce0f1d024e1252)))
+        return 1;
+    if (test__divtf3(0x1.2345f6b77b7a8953365433abcdefp+234L,
+                     0x1.edcba987d6bb3aa467754354321fp-4055L,
+                     UINT64_C(0x50bf2e02f0798d36),
+                     UINT64_C(0x5e6fcb6b60044078)))
+        return 1;
+
+#else
+    printf("skipped\n");
+
+#endif
+    return 0;
+}