xref: /plan9-contrib/sys/src/ape/lib/ap/spim64/memchr.s (revision 6c6e36e1134c52b146e9d71d8c7dc193994c0c4e)
1	TEXT	memchr(SB), $0
2MOVV R1, 0(FP)
3
4	MOVW	n+16(FP), R1
5	MOVV	s1+0(FP), R2
6	MOVBU	c+8(FP), R3
7	ADDVU	R1, R2, R6
8
9	AND	$(~1), R1, R5
10	ADDVU	R2, R5
11	BEQ	R2, R5, lt2
12
13l1:
14	MOVBU	0(R2), R4
15	MOVBU	1(R2), R7
16	BEQ	R3, R4, eq0
17	ADDVU	$2, R2
18	BEQ	R3, R7, eq
19	BNE	R2, R5, l1
20
21lt2:
22	BEQ	R2, R6, zret
23
24l2:
25	MOVBU	(R2), R4
26	ADDVU	$1, R2
27	BEQ	R3, R4, eq
28	BNE	R2, R6, l2
29zret:
30	MOVV	R0, R1
31	RET
32
33eq0:
34	MOVV	R2, R1
35	RET
36
37eq:
38	SUBVU	$1,R2, R1
39	RET
40