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author | 2016-04-11 10:41:07 +0300 | |
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committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/h8300/lib/modsi3.S | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/h8300/lib/modsi3.S')
-rw-r--r-- | kernel/arch/h8300/lib/modsi3.S | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/kernel/arch/h8300/lib/modsi3.S b/kernel/arch/h8300/lib/modsi3.S new file mode 100644 index 000000000..68b1dfc32 --- /dev/null +++ b/kernel/arch/h8300/lib/modsi3.S @@ -0,0 +1,72 @@ +#include "libgcc.h" + +; numerator in A0/A1 +; denominator in A2/A3 + .global __modsi3 +__modsi3: + PUSHP S2P + bsr modnorm + bsr __divsi3 + mov.l er3,er0 + bra exitdiv + + .global __umodsi3 +__umodsi3: + bsr __udivsi3 + mov.l er3,er0 + rts + + .global __divsi3 +__divsi3: + PUSHP S2P + jsr divnorm + bsr __udivsi3 + + ; examine what the sign should be +exitdiv: + btst #3,S2L + beq reti + + ; should be -ve + neg.l A0P + +reti: + POPP S2P + rts + +divnorm: + mov.l A0P,A0P ; is the numerator -ve + stc ccr,S2L ; keep the sign in bit 3 of S2L + bge postive + + neg.l A0P ; negate arg + +postive: + mov.l A1P,A1P ; is the denominator -ve + bge postive2 + + neg.l A1P ; negate arg + xor.b #0x08,S2L ; toggle the result sign + +postive2: + rts + +;; Basically the same, except that the sign of the divisor determines +;; the sign. +modnorm: + mov.l A0P,A0P ; is the numerator -ve + stc ccr,S2L ; keep the sign in bit 3 of S2L + bge mpostive + + neg.l A0P ; negate arg + +mpostive: + mov.l A1P,A1P ; is the denominator -ve + bge mpostive2 + + neg.l A1P ; negate arg + +mpostive2: + rts + + .end |