Hello All,
this patch adds a __ucmpdi2 implementation, recent GCC SVN versions
generate calls to it from some of the FPU emulator functions.
Tested by building and booting a little endian qemu MIPS kernel.
Thiemo
Signed-off-by: Thiemo Seufer <ths@xxxxxxxxxxxx>
diff --git a/arch/mips/lib/Makefile b/arch/mips/lib/Makefile
index d7d3b14..5dad13e 100644
--- a/arch/mips/lib/Makefile
+++ b/arch/mips/lib/Makefile
@@ -9,4 +9,4 @@ obj-y += iomap.o
obj-$(CONFIG_PCI) += iomap-pci.o
# libgcc-style stuff needed in the kernel
-lib-y += ashldi3.o ashrdi3.o lshrdi3.o
+lib-y += ashldi3.o ashrdi3.o lshrdi3.o ucmpdi2.o
diff --git a/arch/mips/lib/ucmpdi2.c b/arch/mips/lib/ucmpdi2.c
new file mode 100644
index 0000000..e9ff258
--- /dev/null
+++ b/arch/mips/lib/ucmpdi2.c
@@ -0,0 +1,19 @@
+#include <linux/module.h>
+
+#include "libgcc.h"
+
+word_type __ucmpdi2 (unsigned long a, unsigned long b)
+{
+ const DWunion au = {.ll = a};
+ const DWunion bu = {.ll = b};
+
+ if ((unsigned int) au.s.high < (unsigned int) bu.s.high)
+ return 0;
+ else if ((unsigned int) au.s.high > (unsigned int) bu.s.high)
+ return 2;
+ if ((unsigned int) au.s.low < (unsigned int) bu.s.low)
+ return 0;
+ else if ((unsigned int) au.s.low > (unsigned int) bu.s.low)
+ return 2;
+ return 1;
+}
