1/* Cloned and hacked for uClibc by Paul Mundt, December 2003 */
 2/* Modified by SuperH, Inc. September 2003 */
 3!
 4! Fast SH memset
 5!
 6! by Toshiyasu Morita (tm@netcom.com)
 7!
 8! SH5 code by J"orn Rennecke (joern.rennecke@superh.com)
 9! Copyright 2002 SuperH Ltd.
10!
11
12#if __BYTE_ORDER == __LITTLE_ENDIAN
13#define SHHI shlld
14#define SHLO shlrd
15#else
16#define SHHI shlrd
17#define SHLO shlld
18#endif
19
20	.section .text..SHmedia32,"ax"
21	.globl	memset
22	.type	memset, @function
23
24	.align 5
25
26memset:
27	pta/l multiquad, tr0
28	andi r2, 7, r22
29	ptabs r18, tr2
30	mshflo.b r3,r3,r3
31	add r4, r22, r23
32	mperm.w r3, r63, r3	// Fill pattern now in every byte of r3
33
34	movi 8, r9
35	bgtu/u r23, r9, tr0 // multiquad
36
37	beqi/u r4, 0, tr2       // Return with size 0 - ensures no mem accesses
38	ldlo.q r2, 0, r7
39	shlli r4, 2, r4
40	movi -1, r8
41	SHHI r8, r4, r8
42	SHHI r8, r4, r8
43	mcmv r7, r8, r3
44	stlo.q r2, 0, r3
45	blink tr2, r63
46
47multiquad:
48	pta/l lastquad, tr0
49	stlo.q r2, 0, r3
50	shlri r23, 3, r24
51	add r2, r4, r5
52	beqi/u r24, 1, tr0 // lastquad
53	pta/l loop, tr1
54	sub r2, r22, r25
55	andi r5, -8, r20   // calculate end address and
56	addi r20, -7*8, r8 // loop end address; This might overflow, so we need
57	                   // to use a different test before we start the loop
58	bge/u r24, r9, tr1 // loop
59	st.q r25, 8, r3
60	st.q r20, -8, r3
61	shlri r24, 1, r24
62	beqi/u r24, 1, tr0 // lastquad
63	st.q r25, 16, r3
64	st.q r20, -16, r3
65	beqi/u r24, 2, tr0 // lastquad
66	st.q r25, 24, r3
67	st.q r20, -24, r3
68lastquad:
69	sthi.q r5, -1, r3
70	blink tr2,r63
71
72loop:
73!!!	alloco r25, 32	// QQQ comment out for short-term fix to SHUK #3895.
74			// QQQ commenting out is locically correct, but sub-optimal
75			// QQQ Sean McGoogan - 4th April 2003.
76	st.q r25, 8, r3
77	st.q r25, 16, r3
78	st.q r25, 24, r3
79	st.q r25, 32, r3
80	addi r25, 32, r25
81	bgeu/l r8, r25, tr1 // loop
82
83	st.q r20, -40, r3
84	st.q r20, -32, r3
85	st.q r20, -24, r3
86	st.q r20, -16, r3
87	st.q r20, -8, r3
88	sthi.q r5, -1, r3
89	blink tr2,r63
90
91	.size	memset,.-memset

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/* Cloned and hacked for uClibc by Paul Mundt, December 2003 */
 3/* Modified by SuperH, Inc. September 2003 */
 4!
 5! Fast SH memset
 6!
 7! by Toshiyasu Morita (tm@netcom.com)
 8!
 9! SH5 code by J"orn Rennecke (joern.rennecke@superh.com)
10! Copyright 2002 SuperH Ltd.
11!
12
13#if __BYTE_ORDER == __LITTLE_ENDIAN
14#define SHHI shlld
15#define SHLO shlrd
16#else
17#define SHHI shlrd
18#define SHLO shlld
19#endif
20
21	.section .text..SHmedia32,"ax"
22	.globl	memset
23	.type	memset, @function
24
25	.align 5
26
27memset:
28	pta/l multiquad, tr0
29	andi r2, 7, r22
30	ptabs r18, tr2
31	mshflo.b r3,r3,r3
32	add r4, r22, r23
33	mperm.w r3, r63, r3	// Fill pattern now in every byte of r3
34
35	movi 8, r9
36	bgtu/u r23, r9, tr0 // multiquad
37
38	beqi/u r4, 0, tr2       // Return with size 0 - ensures no mem accesses
39	ldlo.q r2, 0, r7
40	shlli r4, 2, r4
41	movi -1, r8
42	SHHI r8, r4, r8
43	SHHI r8, r4, r8
44	mcmv r7, r8, r3
45	stlo.q r2, 0, r3
46	blink tr2, r63
47
48multiquad:
49	pta/l lastquad, tr0
50	stlo.q r2, 0, r3
51	shlri r23, 3, r24
52	add r2, r4, r5
53	beqi/u r24, 1, tr0 // lastquad
54	pta/l loop, tr1
55	sub r2, r22, r25
56	andi r5, -8, r20   // calculate end address and
57	addi r20, -7*8, r8 // loop end address; This might overflow, so we need
58	                   // to use a different test before we start the loop
59	bge/u r24, r9, tr1 // loop
60	st.q r25, 8, r3
61	st.q r20, -8, r3
62	shlri r24, 1, r24
63	beqi/u r24, 1, tr0 // lastquad
64	st.q r25, 16, r3
65	st.q r20, -16, r3
66	beqi/u r24, 2, tr0 // lastquad
67	st.q r25, 24, r3
68	st.q r20, -24, r3
69lastquad:
70	sthi.q r5, -1, r3
71	blink tr2,r63
72
73loop:
74!!!	alloco r25, 32	// QQQ comment out for short-term fix to SHUK #3895.
75			// QQQ commenting out is locically correct, but sub-optimal
76			// QQQ Sean McGoogan - 4th April 2003.
77	st.q r25, 8, r3
78	st.q r25, 16, r3
79	st.q r25, 24, r3
80	st.q r25, 32, r3
81	addi r25, 32, r25
82	bgeu/l r8, r25, tr1 // loop
83
84	st.q r20, -40, r3
85	st.q r20, -32, r3
86	st.q r20, -24, r3
87	st.q r20, -16, r3
88	st.q r20, -8, r3
89	sthi.q r5, -1, r3
90	blink tr2,r63
91
92	.size	memset,.-memset