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 2010  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) 	;; ABI considerations for the divide functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 	;; The following registers are call-used:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 	;; __c6xabi_divi A0,A1,A2,A4,A6,B0,B1,B2,B4,B5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 	;; __c6xabi_divu A0,A1,A2,A4,A6,B0,B1,B2,B4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	;; __c6xabi_remi A1,A2,A4,A5,A6,B0,B1,B2,B4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	;; __c6xabi_remu A1,A4,A5,A7,B0,B1,B2,B4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	;;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	;; In our implementation, divu and remu are leaf functions,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	;; while both divi and remi call into divu.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	;; A0 is not clobbered by any of the functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	;; divu does not clobber B2 either, which is taken advantage of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	;; in remi.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	;; divi uses B5 to hold the original return address during
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	;; the call to divu.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	;; remi uses B2 and A5 to hold the input values during the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	;; call to divu.  It stores B3 in on the stack.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	.text
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) ENTRY(__c6xabi_remi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	stw	.d2t2	B3, *B15--[2]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) ||	cmpgt	.l1	0, A4, A1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) ||	cmpgt	.l2	0, B4, B2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) ||	mv	.s1	A4, A5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) ||	call	.s2	__c6xabi_divu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)    [A1]	neg	.l1	A4, A4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) || [B2]	neg	.l2	B4, B4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) ||	xor	.s2x	B2, A1, B0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) ||	mv	.d2	B4, B2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)    [B0]	addkpc	.s2	_divu_ret_1, B3, 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)   [!B0] addkpc	.s2	_divu_ret_2, B3, 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	nop	2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) _divu_ret_1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	neg	.l1	A4, A4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) _divu_ret_2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	ldw	.d2t2	*++B15[2], B3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	mpy32	.m1x	A4, B2, A6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	nop		3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	ret	.s2	B3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	sub	.l1	A5, A6, A4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	nop	4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) ENDPROC(__c6xabi_remi)