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[/] [or1k_old/] [trunk/] [linux/] [uClibc/] [libc/] [string/] [sh64/] [strcpy.S] - Blame information for rev 1782

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/* Cloned and hacked for uClibc by Paul Mundt, December 2003 */
/* Modified by SuperH, Inc. September 2003 */
! Entry: arg0: destination
!        arg1: source
! Exit:  result: destination
!
! SH5 code Copyright 2002 SuperH Ltd.
 
#ifdef __LITTLE_ENDIAN__
#define SHHI shlld
#define SHLO shlrd
#else
#define SHHI shlrd
#define SHLO shlld
#endif
 
        .section .text..SHmedia32,"ax"
        .globl  strcpy
        .type   strcpy, @function
 
        .align 5
strcpy:
 
        pta/l shortstring,tr1
        ldlo.q r3,0,r4
        ptabs r18,tr4
        shlli r3,3,r7
        addi r2, 8, r0
        mcmpeq.b r4,r63,r6
        SHHI r6,r7,r6
        bnei/u r6,0,tr1 // shortstring
        pta/l no_lddst, tr2
        ori r3,-8,r23
        sub r2, r23, r0
        sub r3, r2, r21
        addi r21, 8, r20
        ldx.q r0, r21, r5
        pta/l loop, tr0
        ori r2,-8,r22
        mcmpeq.b r5, r63, r6
        bgt/u r22, r23, tr2 // no_lddst
 
        // r22 < r23 :  Need to do a load from the destination.
        // r22 == r23 : Doesn't actually need to load from destination,
        //              but still can be handled here.
        ldlo.q r2, 0, r9
        movi -1, r8
        SHLO r8, r7, r8
        mcmv r4, r8, r9
        stlo.q r2, 0, r9
        beqi/l r6, 0, tr0 // loop
 
        add r5, r63, r4
        addi r0, 8, r0
        blink tr1, r63 // shortstring
no_lddst:
        // r22 > r23: note that for r22 == r23 the sthi.q would clobber
        //            bytes before the destination region.
        stlo.q r2, 0, r4
        SHHI r4, r7, r4
        sthi.q r0, -1, r4
        beqi/l r6, 0, tr0 // loop
 
        add r5, r63, r4
        addi r0, 8, r0
shortstring:
#ifndef __LITTLE_ENDIAN__
        pta/l shortstring2,tr1
        byterev r4,r4
#endif
shortstring2:
        st.b r0,-8,r4
        andi r4,0xff,r5
        shlri r4,8,r4
        addi r0,1,r0
        bnei/l r5,0,tr1
        blink tr4,r63 // return
 
        .balign 8
loop:
        stlo.q r0, 0, r5
        ldx.q r0, r20, r4
        addi r0, 16, r0
        sthi.q r0, -9, r5
        mcmpeq.b r4, r63, r6
        bnei/u r6, 0, tr1 // shortstring
        ldx.q r0, r21, r5
        stlo.q r0, -8, r4
        sthi.q r0, -1, r4
        mcmpeq.b r5, r63, r6
        beqi/l r6, 0, tr0 // loop
 
        add r5, r63, r4
        addi r0, 8, r0
        blink tr1, r63 // shortstring
 
        .size   strcpy, . - strcpy
 

Line No.	Rev	Author	Line
1	1325	phoenix	`/* Cloned and hacked for uClibc by Paul Mundt, December 2003 */`
2			`/* Modified by SuperH, Inc. September 2003 */`
3			`! Entry: arg0: destination`
4			`! arg1: source`
5			`! Exit: result: destination`
6			`!`
7			`! SH5 code Copyright 2002 SuperH Ltd.`
8
9			`#ifdef __LITTLE_ENDIAN__`
10			`#define SHHI shlld`
11			`#define SHLO shlrd`
12			`#else`
13			`#define SHHI shlrd`
14			`#define SHLO shlld`
15			`#endif`
16
17			`.section .text..SHmedia32,"ax"`
18			`.globl strcpy`
19			`.type strcpy, @function`
20
21			`.align 5`
22			`strcpy:`
23
24			`pta/l shortstring,tr1`
25			`ldlo.q r3,0,r4`
26			`ptabs r18,tr4`
27			`shlli r3,3,r7`
28			`addi r2, 8, r0`
29			`mcmpeq.b r4,r63,r6`
30			`SHHI r6,r7,r6`
31			`bnei/u r6,0,tr1 // shortstring`
32			`pta/l no_lddst, tr2`
33			`ori r3,-8,r23`
34			`sub r2, r23, r0`
35			`sub r3, r2, r21`
36			`addi r21, 8, r20`
37			`ldx.q r0, r21, r5`
38			`pta/l loop, tr0`
39			`ori r2,-8,r22`
40			`mcmpeq.b r5, r63, r6`
41			`bgt/u r22, r23, tr2 // no_lddst`
42
43			`// r22 < r23 : Need to do a load from the destination.`
44			`// r22 == r23 : Doesn't actually need to load from destination,`
45			`// but still can be handled here.`
46			`ldlo.q r2, 0, r9`
47			`movi -1, r8`
48			`SHLO r8, r7, r8`
49			`mcmv r4, r8, r9`
50			`stlo.q r2, 0, r9`
51			`beqi/l r6, 0, tr0 // loop`
52
53			`add r5, r63, r4`
54			`addi r0, 8, r0`
55			`blink tr1, r63 // shortstring`
56			`no_lddst:`
57			`// r22 > r23: note that for r22 == r23 the sthi.q would clobber`
58			`// bytes before the destination region.`
59			`stlo.q r2, 0, r4`
60			`SHHI r4, r7, r4`
61			`sthi.q r0, -1, r4`
62			`beqi/l r6, 0, tr0 // loop`
63
64			`add r5, r63, r4`
65			`addi r0, 8, r0`
66			`shortstring:`
67			`#ifndef __LITTLE_ENDIAN__`
68			`pta/l shortstring2,tr1`
69			`byterev r4,r4`
70			`#endif`
71			`shortstring2:`
72			`st.b r0,-8,r4`
73			`andi r4,0xff,r5`
74			`shlri r4,8,r4`
75			`addi r0,1,r0`
76			`bnei/l r5,0,tr1`
77			`blink tr4,r63 // return`
78
79			`.balign 8`
80			`loop:`
81			`stlo.q r0, 0, r5`
82			`ldx.q r0, r20, r4`
83			`addi r0, 16, r0`
84			`sthi.q r0, -9, r5`
85			`mcmpeq.b r4, r63, r6`
86			`bnei/u r6, 0, tr1 // shortstring`
87			`ldx.q r0, r21, r5`
88			`stlo.q r0, -8, r4`
89			`sthi.q r0, -1, r4`
90			`mcmpeq.b r5, r63, r6`
91			`beqi/l r6, 0, tr0 // loop`
92
93			`add r5, r63, r4`
94			`addi r0, 8, r0`
95			`blink tr1, r63 // shortstring`
96
97			`.size strcpy, . - strcpy`
98

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[/] [or1k_old/] [trunk/] [linux/] [uClibc/] [libc/] [string/] [sh64/] [strcpy.S] - Blame information for rev 1782