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Commit acbfd58e authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt
Browse files

powerpc: Fix div64 in bootloader 



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: default avatarAlbert Cahalan <acahalan@gmail.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 7957f0a8

arch/powerpc/boot/div64.S

+2 −1
Original line number Original line Diff line number Diff line
@@ -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