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| author | Paul Mackerras <paulus@samba.org> | 2008-03-13 09:39:55 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-03-13 09:39:55 +1100 |
| commit | 95ff54f5176a36f65522e46c670a571728328b10 (patch) | |
| tree | ab569ddca890ff70c4770e4376f119355c042695 /arch/powerpc | |
| parent | 9cf7f7fac8c36e54e4869fc01e1bad0d3b4de53b (diff) | |
| download | linux-95ff54f5176a36f65522e46c670a571728328b10.tar.gz linux-95ff54f5176a36f65522e46c670a571728328b10.tar.bz2 linux-95ff54f5176a36f65522e46c670a571728328b10.zip | |
[POWERPC] Add __ucmpdi2 for 64-bit comparisons in 32-bit kernels
Some drivers (such as V4L2) have code that causes gcc to generate
calls to __ucmpdi2 when compiling for 32-bit powerpc, which results
in either a link-time error or a module that can't be loaded, as
we don't currently have a __ucmpdi2. This adds one so these drivers
can be used.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/misc_32.S | 15 | ||||
| -rw-r--r-- | arch/powerpc/kernel/ppc_ksyms.c | 2 |
2 files changed, 17 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S index 5c2e253ddfb1..9d2c56621f1e 100644 --- a/arch/powerpc/kernel/misc_32.S +++ b/arch/powerpc/kernel/misc_32.S @@ -785,6 +785,21 @@ _GLOBAL(__lshrdi3) or r4,r4,r7 # LSW |= t2 blr +/* + * 64-bit comparison: __ucmpdi2(u64 a, u64 b) + * Returns 0 if a < b, 1 if a == b, 2 if a > b. + */ +_GLOBAL(__ucmpdi2) + cmplw r3,r5 + li r3,1 + bne 1f + cmplw r4,r6 + beqlr +1: li r3,0 + bltlr + li r3,2 + blr + _GLOBAL(abs) srawi r4,r3,31 xor r3,r3,r4 diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c index aa9ff35b0e63..3e52122c5073 100644 --- a/arch/powerpc/kernel/ppc_ksyms.c +++ b/arch/powerpc/kernel/ppc_ksyms.c @@ -149,6 +149,8 @@ long long __lshrdi3(long long, int); EXPORT_SYMBOL(__ashrdi3); EXPORT_SYMBOL(__ashldi3); EXPORT_SYMBOL(__lshrdi3); +int __ucmpdi2(unsigned long long, unsigned long long); +EXPORT_SYMBOL(__ucmpdi2); #endif EXPORT_SYMBOL(memcpy); |