lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

powerpc: Fix div64 in bootloader

Browse Source 
The code is missing a fix that went into the main kernel variant
(we should try to share that code again at some stage)

Reported-by: Albert Cahalan <acahalan@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt
2010-11-18 14:39:24 +11:00
parent 7957f0a857
commit acbfd58e8a
1 changed files with 2 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
arch/powerpc/boot/div64.S
View File

@@ -33,9 +33,10 @@ __div64_32:
cntlzw r0,r5 # we are shifting the dividend right cntlzw r0,r5 # we are shifting the dividend right
li r10,-1 # to make it < 2^32, and shifting li r10,-1 # to make it < 2^32, and shifting
srw r10,r10,r0 # the divisor right the same amount, srw r10,r10,r0 # the divisor right the same amount,
add r9,r4,r10 # rounding up (so the estimate cannot addc r9,r4,r10 # rounding up (so the estimate cannot
andc r11,r6,r10 # ever be too large, only too small) andc r11,r6,r10 # ever be too large, only too small)
andc r9,r9,r10 andc r9,r9,r10
addze r9,r9
or r11,r5,r11 or r11,r5,r11
rotlw r9,r9,r0 rotlw r9,r9,r0
rotlw r11,r11,r0 rotlw r11,r11,r0