sparc/lib/memset.S

6  * Returns 0, if ok, and number of bytes not yet set if exception
12 /* Work around cpp -rob */
15 #define EX(x,y,a,b) 				\  argument
19 99:	ba 30f;					\
20 	 a, b, %o0;				\
30 	.word	start, 0, end, handler;		\
38 	std	source, [base + offset + 0x00]; \
39 	std	source, [base + offset + 0x08]; \
40 	std	source, [base + offset + 0x10]; \
41 	std	source, [base + offset + 0x18]; \
42 	std	source, [base + offset + 0x20]; \
43 	std	source, [base + offset + 0x28]; \
44 	std	source, [base + offset + 0x30]; \
45 	std	source, [base + offset + 0x38];
48 	std	source, [base - offset - 0x38]; \
49 	std	source, [base - offset - 0x30]; \
50 	std	source, [base - offset - 0x28]; \
51 	std	source, [base - offset - 0x20]; \
52 	std	source, [base - offset - 0x18]; \
53 	std	source, [base - offset - 0x10]; \
54 	std	source, [base - offset - 0x08]; \
55 	std	source, [base - offset - 0x00];
68 	and	%o1, 0xff, %g3
73 	b	1f
77 	be	2f
78 	 EX(stb	%g3, [%o0], sub %o1, 0)
81 	be	2f
82 	 EX(stb	%g3, [%o0 + 0x01], sub %o1, 1)
84 	EX(stb	%g3, [%o0 + 0x02], sub %o1, 2)
88 	b	4f
95 	bleu	7f
102 	be	2f
105 	EX(st	%g3, [%o0], sub %o1, 0)
109 	andcc	%o1, 0xffffff80, %o3	! Now everything is 8 aligned and o1 is len to run
110 	be	9f
111 	 andcc	%o1, 0x78, %o2
113 	ZERO_BIG_BLOCK(%o0, 0x00, %g2)
115 	ZERO_BIG_BLOCK(%o0, 0x40, %g2)
117 	EXT(10b, 11b, 20f)
122 9:
123 	be	13f
127 	set	13f, %o4
133 	ZERO_LAST_BLOCKS(%o0, 0x48, %g2)
134 	ZERO_LAST_BLOCKS(%o0, 0x08, %g2)
136 	be	8f
139 	be	1f
145 	be	1f
151 	bne,a	8f
158 	 orcc	%o1, 0, %g0
160 	be	0f
165 	 EX(stb	%g3, [%o0 - 1], add %o1, 1)
166 0:
175 	bleu	1f
176 	 and	%o1, 0x7f, %o1
177 	sub	%g2, 9, %g2
182 	b 30f
189 	b 30f
193 	save	%sp, -104, %sp