builtins: Allow building windows arm functions for mingw

When building with clang/LLVM in MSVC mode, the msvcrt libraries contain
these functions.

When building in a mingw environment, we need to provide them somehow,
e.g. via compiler-rt.

The aeabi divmod functions work in the same way as the corresponding
__rt_*div* functions for windows, but their parameters are swapped.
The functions for converting float to integer and vice versa are the
same as their aeabi equivalents, only with different function names.

Differential Revision: https://reviews.llvm.org/D26183

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@287465 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 36 insertions, 0 deletions

diff --git a/lib/builtins/mingw_fixfloat.c b/lib/builtins/mingw_fixfloat.c
new file mode 100644
index 000000000..c462e0dbf
--- /dev/null
+++ b/lib/builtins/mingw_fixfloat.c
@@ -0,0 +1,36 @@
+/* ===-- mingw_fixfloat.c - Wrap int/float conversions for arm/windows -----===
+ *
+ *                     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.
+ *
+ * ===----------------------------------------------------------------------===
+ */
+
+#include "int_lib.h"
+
+COMPILER_RT_ABI di_int __fixdfdi(double a);
+COMPILER_RT_ABI di_int __fixsfdi(float a);
+COMPILER_RT_ABI du_int __fixunsdfdi(double a);
+COMPILER_RT_ABI du_int __fixunssfdi(float a);
+COMPILER_RT_ABI double __floatdidf(di_int a);
+COMPILER_RT_ABI float __floatdisf(di_int a);
+COMPILER_RT_ABI double __floatundidf(du_int a);
+COMPILER_RT_ABI float __floatundisf(du_int a);
+
+COMPILER_RT_ABI di_int __dtoi64(double a) { return __fixdfdi(a); }
+
+COMPILER_RT_ABI di_int __stoi64(float a) { return __fixsfdi(a); }
+
+COMPILER_RT_ABI du_int __dtou64(double a) { return __fixunsdfdi(a); }
+
+COMPILER_RT_ABI du_int __stou64(float a) { return __fixunssfdi(a); }
+
+COMPILER_RT_ABI double __i64tod(di_int a) { return __floatdidf(a); }
+
+COMPILER_RT_ABI float __i64tos(di_int a) { return __floatdisf(a); }
+
+COMPILER_RT_ABI double __u64tod(du_int a) { return __floatundidf(a); }
+
+COMPILER_RT_ABI float __u64tos(du_int a) { return __floatundisf(a); }