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authorRalf Baechle <ralf@linux-mips.org>2007-08-24 08:47:45 -0400
committerRalf Baechle <ralf@linux-mips.org>2007-08-26 21:17:00 -0400
commit2704afebecc8e268e8c873b6dfab2077d679b593 (patch)
tree275a55b0401599f5362fad7ff90e9ea4590d0dfb /arch/mips/lib
parent606bf782846163b87868d8cdd46f44241c0c2a6b (diff)
[MIPS] Add __cmpdi2
Certain 32-bit kernel configurations seem to be able to cause references, this was observed with gcc 4.1.2. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/lib')
-rw-r--r--arch/mips/lib/Makefile2
-rw-r--r--arch/mips/lib/cmpdi2.c27
2 files changed, 28 insertions, 1 deletions
diff --git a/arch/mips/lib/Makefile b/arch/mips/lib/Makefile
index 91ed1eb33102..8810dfb915dd 100644
--- a/arch/mips/lib/Makefile
+++ b/arch/mips/lib/Makefile
@@ -28,4 +28,4 @@ obj-$(CONFIG_CPU_TX49XX) += dump_tlb.o
28obj-$(CONFIG_CPU_VR41XX) += dump_tlb.o 28obj-$(CONFIG_CPU_VR41XX) += dump_tlb.o
29 29
30# libgcc-style stuff needed in the kernel 30# libgcc-style stuff needed in the kernel
31obj-y += ashldi3.o ashrdi3.o lshrdi3.o ucmpdi2.o 31obj-y += ashldi3.o ashrdi3.o cmpdi2.o lshrdi3.o ucmpdi2.o
diff --git a/arch/mips/lib/cmpdi2.c b/arch/mips/lib/cmpdi2.c
new file mode 100644
index 000000000000..8c1306437ed1
--- /dev/null
+++ b/arch/mips/lib/cmpdi2.c
@@ -0,0 +1,27 @@
1#include <linux/module.h>
2
3#include "libgcc.h"
4
5word_type __cmpdi2(long long a, long long b)
6{
7 const DWunion au = {
8 .ll = a
9 };
10 const DWunion bu = {
11 .ll = b
12 };
13
14 if (au.s.high < bu.s.high)
15 return 0;
16 else if (au.s.high > bu.s.high)
17 return 2;
18
19 if ((unsigned int) au.s.low < (unsigned int) bu.s.low)
20 return 0;
21 else if ((unsigned int) au.s.low > (unsigned int) bu.s.low)
22 return 2;
23
24 return 1;
25}
26
27EXPORT_SYMBOL(__cmpdi2);