Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) ; SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) ; mulsi3 for H8/300H - based on Renesas SH implementation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) ; by Toshiyasu Morita
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) ; Old code:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) ; 16b * 16b = 372 states (worst case)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) ; 32b * 32b = 724 states (worst case)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) ; New code:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) ; 16b * 16b =  48 states
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) ; 16b * 32b =  72 states
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) ; 32b * 32b =  92 states
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	.global __mulsi3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) __mulsi3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	mov.w	r1,r2   ; ( 2 states) b * d
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	mulxu	r0,er2  ; (22 states)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	mov.w	e0,r3   ; ( 2 states) a * d
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	beq	L_skip1 ; ( 4 states)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	mulxu	r1,er3  ; (22 states)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	add.w	r3,e2   ; ( 2 states)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) L_skip1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	mov.w	e1,r3   ; ( 2 states) c * b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	beq	L_skip2 ; ( 4 states)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	mulxu	r0,er3  ; (22 states)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	add.w	r3,e2   ; ( 2 states)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) L_skip2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	mov.l	er2,er0	; ( 2 states)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	rts		; (10 states)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	.end