From 316d58822dada9440bd06ecfc758dcc2364d617c Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Mon, 2 Jan 2017 19:18:27 +0000
Subject: Vendor import of compiler-rt trunk r290819:
 https://llvm.org/svn/llvm-project/compiler-rt/trunk@290819

---
 lib/builtins/arm/aeabi_uidivmod.S | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'lib/builtins/arm/aeabi_uidivmod.S')

diff --git a/lib/builtins/arm/aeabi_uidivmod.S b/lib/builtins/arm/aeabi_uidivmod.S
index e1e12d97aa001..7098bc6ff92ea 100644
--- a/lib/builtins/arm/aeabi_uidivmod.S
+++ b/lib/builtins/arm/aeabi_uidivmod.S
@@ -16,16 +16,40 @@
 //   return {quot, rem};
 // }
 
+#if defined(__MINGW32__)
+#define __aeabi_uidivmod __rt_udiv
+#endif
+
         .syntax unified
         .p2align 2
 DEFINE_COMPILERRT_FUNCTION(__aeabi_uidivmod)
+#if __ARM_ARCH_ISA_THUMB == 1
+        cmp     r0, r1
+        bcc     LOCAL_LABEL(case_denom_larger)
+        push    {r0, r1, lr}
+        bl      SYMBOL_NAME(__aeabi_uidiv)
+        pop     {r1, r2, r3}
+        muls    r2, r2, r0 // r2 = quot * denom
+        subs    r1, r1, r2
+        JMP     (r3)
+LOCAL_LABEL(case_denom_larger):
+        movs    r1, r0
+        movs    r0, #0
+        JMP     (lr)
+#else
         push    { lr }
         sub     sp, sp, #4
         mov     r2, sp
+#if defined(__MINGW32__)
+        mov     r3, r0
+        mov     r0, r1
+        mov     r1, r3
+#endif
         bl      SYMBOL_NAME(__udivmodsi4)
         ldr     r1, [sp]
         add     sp, sp, #4
         pop     { pc }
+#endif
 END_COMPILERRT_FUNCTION(__aeabi_uidivmod)
 
 NO_EXEC_STACK_DIRECTIVE
-- 
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