Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) ;; SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) ;;  Copyright 2011  Free Software Foundation, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) ;;  Contributed by Bernd Schmidt <bernds@codesourcery.com>.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) ;;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/linkage.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 	.text
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) ENTRY(__c6xabi_divremu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 	;; We use a series of up to 31 subc instructions.  First, we find
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 	;; out how many leading zero bits there are in the divisor.  This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	;; gives us both a shift count for aligning (shifting) the divisor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	;; to the, and the number of times we have to execute subc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	;; At the end, we have both the remainder and most of the quotient
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	;; in A4.  The top bit of the quotient is computed first and is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	;; placed in A2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	;; Return immediately if the dividend is zero.	Setting B4 to 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	;; is a trick to allow us to leave the following insns in the jump
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	;; delay slot without affecting the result.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	mv	.s2x	A4, B1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)   [b1]	lmbd	.l2	1, B4, B1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) ||[!b1] b	.s2	B3	; RETURN A
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) ||[!b1] mvk	.d2	1, B4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) ||[!b1] zero	.s1	A5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	mv	.l1x	B1, A6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) ||	shl	.s2	B4, B1, B4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	;; The loop performs a maximum of 28 steps, so we do the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	;; first 3 here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	cmpltu	.l1x	A4, B4, A2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)   [!A2]	sub	.l1x	A4, B4, A4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) ||	shru	.s2	B4, 1, B4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) ||	xor	.s1	1, A2, A2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	shl	.s1	A2, 31, A2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) || [b1]	subc	.l1x	A4,B4,A4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) || [b1]	add	.s2	-1, B1, B1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)    [b1]	subc	.l1x	A4,B4,A4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) || [b1]	add	.s2	-1, B1, B1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	;; RETURN A may happen here (note: must happen before the next branch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) __divremu0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	cmpgt	.l2	B1, 7, B0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) || [b1]	subc	.l1x	A4,B4,A4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) || [b1]	add	.s2	-1, B1, B1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)    [b1]	subc	.l1x	A4,B4,A4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) || [b1]	add	.s2	-1, B1, B1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) || [b0] b	.s1	__divremu0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)    [b1]	subc	.l1x	A4,B4,A4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) || [b1]	add	.s2	-1, B1, B1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)    [b1]	subc	.l1x	A4,B4,A4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) || [b1]	add	.s2	-1, B1, B1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)    [b1]	subc	.l1x	A4,B4,A4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) || [b1]	add	.s2	-1, B1, B1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)    [b1]	subc	.l1x	A4,B4,A4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) || [b1]	add	.s2	-1, B1, B1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)    [b1]	subc	.l1x	A4,B4,A4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) || [b1]	add	.s2	-1, B1, B1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	;; loop backwards branch happens here
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	ret	.s2	B3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) ||	mvk	.s1	32, A1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	sub	.l1	A1, A6, A6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) ||	extu	.s1	A4, A6, A5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	shl	.s1	A4, A6, A4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	shru	.s1	A4, 1, A4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) ||	sub	.l1	A6, 1, A6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	or	.l1	A2, A4, A4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 	shru	.s1	A4, A6, A4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	nop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) ENDPROC(__c6xabi_divremu)