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author | David S. Miller <davem@sunset.davemloft.net> | 2007-08-25 15:10:44 -0700 |
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committer | David S. Miller <davem@sunset.davemloft.net> | 2007-08-26 18:49:09 -0700 |
commit | 6cc0735d0dbf6a0e5f802f47d51e1e463466955c (patch) | |
tree | 62840e618992c257eff51c65bfe66a14f5942c9a /arch/sparc/lib/cmpdi2.c | |
parent | 6c8f5b90bfbe69a27763fb0e181bd2465181446d (diff) | |
download | op-kernel-dev-6cc0735d0dbf6a0e5f802f47d51e1e463466955c.zip op-kernel-dev-6cc0735d0dbf6a0e5f802f47d51e1e463466955c.tar.gz |
[SPARC32]: Add __cmpdi2() libcall implementation ala. MIPS.
Device mapper generates calls to this with recent versions
of gcc.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/lib/cmpdi2.c')
-rw-r--r-- | arch/sparc/lib/cmpdi2.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/sparc/lib/cmpdi2.c b/arch/sparc/lib/cmpdi2.c new file mode 100644 index 0000000..8c13064 --- /dev/null +++ b/arch/sparc/lib/cmpdi2.c @@ -0,0 +1,27 @@ +#include <linux/module.h> + +#include "libgcc.h" + +word_type __cmpdi2(long long a, long long b) +{ + const DWunion au = { + .ll = a + }; + const DWunion bu = { + .ll = b + }; + + if (au.s.high < bu.s.high) + return 0; + else if (au.s.high > 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; +} + +EXPORT_SYMBOL(__cmpdi2); |