compiler_rt: Import aeabi_ldivmode.S file and dependencies
Import aeabi_ldivmod.S with divmoddi4.c and divdi3.c from the
LLVM compiler_rt library on master branch as of 30 Oct 2018
(SVN revision: r345645).
This is to get the __aeabi_ldivmod builtin, which is required
by a patch using signed long long division.
Change-Id: Iee4c421deb3175142655e19074cd3732edd82227
Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
diff --git a/lib/compiler-rt/builtins/arm/aeabi_ldivmod.S b/lib/compiler-rt/builtins/arm/aeabi_ldivmod.S
new file mode 100644
index 0000000..038ae5d
--- /dev/null
+++ b/lib/compiler-rt/builtins/arm/aeabi_ldivmod.S
@@ -0,0 +1,46 @@
+//===-- aeabi_ldivmod.S - EABI ldivmod implementation ---------------------===//
+//
+// 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 "../assembly.h"
+
+// struct { int64_t quot, int64_t rem}
+// __aeabi_ldivmod(int64_t numerator, int64_t denominator) {
+// int64_t rem, quot;
+// quot = __divmoddi4(numerator, denominator, &rem);
+// return {quot, rem};
+// }
+
+#if defined(__MINGW32__)
+#define __aeabi_ldivmod __rt_sdiv64
+#endif
+
+ .syntax unified
+ .p2align 2
+DEFINE_COMPILERRT_FUNCTION(__aeabi_ldivmod)
+ push {r6, lr}
+ sub sp, sp, #16
+ add r6, sp, #8
+ str r6, [sp]
+#if defined(__MINGW32__)
+ movs r6, r0
+ movs r0, r2
+ movs r2, r6
+ movs r6, r1
+ movs r1, r3
+ movs r3, r6
+#endif
+ bl SYMBOL_NAME(__divmoddi4)
+ ldr r2, [sp, #8]
+ ldr r3, [sp, #12]
+ add sp, sp, #16
+ pop {r6, pc}
+END_COMPILERRT_FUNCTION(__aeabi_ldivmod)
+
+NO_EXEC_STACK_DIRECTIVE
+