| 1 |
9 |
jlechner |
/*
|
| 2 |
|
|
* (c) Copyright 1986 HEWLETT-PACKARD COMPANY
|
| 3 |
|
|
*
|
| 4 |
|
|
* To anyone who acknowledges that this file is provided "AS IS"
|
| 5 |
|
|
* without any express or implied warranty:
|
| 6 |
|
|
* permission to use, copy, modify, and distribute this file
|
| 7 |
|
|
* for any purpose is hereby granted without fee, provided that
|
| 8 |
|
|
* the above copyright notice and this notice appears in all
|
| 9 |
|
|
* copies, and that the name of Hewlett-Packard Company not be
|
| 10 |
|
|
* used in advertising or publicity pertaining to distribution
|
| 11 |
|
|
* of the software without specific, written prior permission.
|
| 12 |
|
|
* Hewlett-Packard Company makes no representations about the
|
| 13 |
|
|
* suitability of this software for any purpose.
|
| 14 |
|
|
*/
|
| 15 |
|
|
|
| 16 |
|
|
/* HPUX_ID: @(#) $Revision: 1.1 $ */
|
| 17 |
|
|
/*
|
| 18 |
|
|
* strcat(s1, s2)
|
| 19 |
|
|
*
|
| 20 |
|
|
* Concatenate s2 on the end of s1. S1's space must be large enough.
|
| 21 |
|
|
* Return s1.
|
| 22 |
|
|
*/
|
| 23 |
|
|
#include "DEFS.h"
|
| 24 |
|
|
|
| 25 |
|
|
#define d_addr r26
|
| 26 |
|
|
#define s_addr r25
|
| 27 |
|
|
#define tmp6 r24
|
| 28 |
|
|
#define tmp1 r19
|
| 29 |
|
|
#define tmp2 r20
|
| 30 |
|
|
#define tmp3 r21
|
| 31 |
|
|
#define tmp4 r22
|
| 32 |
|
|
#define tmp5 arg3
|
| 33 |
|
|
#define save r1
|
| 34 |
|
|
|
| 35 |
|
|
|
| 36 |
|
|
ENTRY(strcat)
|
| 37 |
|
|
|
| 38 |
|
|
comb,= r0,s_addr,done /* quit if s2=NULL */
|
| 39 |
|
|
copy d_addr,ret0 /* The return value is the value of d_addr. DELAY SLOT*/
|
| 40 |
|
|
|
| 41 |
|
|
/* First look for end of s1 (d_addr) */
|
| 42 |
|
|
|
| 43 |
|
|
extru d_addr,31,2,tmp1 /* Extract the low two bits of the dest address. */
|
| 44 |
|
|
combt,= tmp1,r0,dont_mask
|
| 45 |
|
|
dep 0,31,2,d_addr /*set word alignment */
|
| 46 |
|
|
ldwm 4(d_addr),tmp2
|
| 47 |
|
|
sh3add tmp1,r0,save /* build mask based on tmp1 */
|
| 48 |
|
|
mtctl save,11
|
| 49 |
|
|
zvdepi -2,32,save
|
| 50 |
|
|
or save,tmp2,tmp2
|
| 51 |
|
|
uxor,nbz tmp2,r0,save
|
| 52 |
|
|
search:
|
| 53 |
|
|
b,n found_end /* nullified under uxor conditions above and below */
|
| 54 |
|
|
dont_mask:
|
| 55 |
|
|
ldwm 4(d_addr),tmp2
|
| 56 |
|
|
comib,tr r0,r0,search
|
| 57 |
|
|
uxor,nbz tmp2,r0,save
|
| 58 |
|
|
|
| 59 |
|
|
found_end: /* at this point d_addr points to word */
|
| 60 |
|
|
extru,<> save,7,8,r0 /* following word with null */
|
| 61 |
|
|
addib,tr,n -4,d_addr,begin_copy /*set d_addr to end of s1 */
|
| 62 |
|
|
extru,<> save,15,8,r0
|
| 63 |
|
|
addib,tr,n -3,d_addr,begin_copy
|
| 64 |
|
|
extru,<> save,23,8,r0
|
| 65 |
|
|
addi -1,d_addr,d_addr
|
| 66 |
|
|
addi -1,d_addr,d_addr
|
| 67 |
|
|
|
| 68 |
|
|
|
| 69 |
|
|
begin_copy:
|
| 70 |
|
|
|
| 71 |
|
|
extru s_addr,31,2,tmp1 /* Extract the low two bits of the source address. */
|
| 72 |
|
|
extru d_addr,31,2,tmp6 /* Extract the low two bits of the destination address. */
|
| 73 |
|
|
sub,= tmp6,tmp1,tmp3 /* Compute the shift quantity and don't branch if tmp6=tmp1. */
|
| 74 |
|
|
b not_aligned /* Not_aligned says that shifts Will be needed. */
|
| 75 |
|
|
dep 0,31,2,s_addr /* Compute the word address of the source. DELAY SLOT. */
|
| 76 |
|
|
/* aligned */
|
| 77 |
|
|
|
| 78 |
|
|
combt,= tmp6,r0,skip_mask
|
| 79 |
|
|
ldwm 4(0,s_addr),tmp1 /* tmp1 = *s_addr s_addr += 4 (DELAY SLOT) */
|
| 80 |
|
|
sh3add tmp6,r0,save
|
| 81 |
|
|
mtctl save,r11
|
| 82 |
|
|
zvdepi -2,32,save
|
| 83 |
|
|
or save,tmp1,tmp1
|
| 84 |
|
|
uxor,nbz tmp1,r0,save
|
| 85 |
|
|
b,n first_null /* special case: null in first word */
|
| 86 |
|
|
b,n skip_mask2
|
| 87 |
|
|
|
| 88 |
|
|
chunks:
|
| 89 |
|
|
b,n null_found /* delay slot for uxor below */
|
| 90 |
|
|
|
| 91 |
|
|
skip_mask2:
|
| 92 |
|
|
stbys,b,m tmp1,4(d_addr)
|
| 93 |
|
|
ldwm 4(s_addr),tmp1
|
| 94 |
|
|
skip_mask:
|
| 95 |
|
|
comib,tr 0,0,chunks
|
| 96 |
|
|
uxor,nbz tmp1,r0,save
|
| 97 |
|
|
|
| 98 |
|
|
/* Begin non_aligned code. */
|
| 99 |
|
|
|
| 100 |
|
|
not_aligned:
|
| 101 |
|
|
sh3add,>= tmp3,r0,tmp4 /* compute the shift amt.and skip load if tmp6 > tmp1. */
|
| 102 |
|
|
ldwm 4(0,s_addr),tmp1 /* load up the first word from the source. tmp1 = *s_addr++ */
|
| 103 |
|
|
ldwm 4(0,s_addr),tmp2 /* get either first or second word from source. */
|
| 104 |
|
|
combt,= tmp6,r0,chunk2 /* don't mask if whole word is valid */
|
| 105 |
|
|
mtctl tmp4,11 /* load the shift count into cr11 = shift count register. */
|
| 106 |
|
|
vshd tmp1,tmp2,tmp3 /* position data ! (delay slot) */
|
| 107 |
|
|
sh3add tmp6,r0,save /* setup r1 */
|
| 108 |
|
|
mtctl save,r11 /* set-up cr11 for mask */
|
| 109 |
|
|
zvdepi -2,32,save
|
| 110 |
|
|
or save, tmp3, tmp3
|
| 111 |
|
|
uxor,nbz tmp3,r0,save
|
| 112 |
|
|
b,n first_null2
|
| 113 |
|
|
b did_mask
|
| 114 |
|
|
mtctl tmp4,11 /* re-load the shift count into cr11 */
|
| 115 |
|
|
|
| 116 |
|
|
chunk2:
|
| 117 |
|
|
vshd tmp1,tmp2,tmp3
|
| 118 |
|
|
uxor,nbz tmp3, r0, save
|
| 119 |
|
|
b,n null_found
|
| 120 |
|
|
did_mask:
|
| 121 |
|
|
stbys,b,m tmp3,4(0,d_addr) /* store ! */
|
| 122 |
|
|
|
| 123 |
|
|
ldwm 4(0,s_addr),tmp1 /* get next word ! */
|
| 124 |
|
|
vshd tmp2,tmp1,tmp3 /* position data ! */
|
| 125 |
|
|
uxor,nbz tmp3, r0, save
|
| 126 |
|
|
b,n null_found
|
| 127 |
|
|
stwm tmp3,4(d_addr)
|
| 128 |
|
|
comib,tr 0,0,chunk2
|
| 129 |
|
|
ldwm 4(s_addr),tmp2
|
| 130 |
|
|
|
| 131 |
|
|
|
| 132 |
|
|
null_found: /* adjust d_addr and store final word */
|
| 133 |
|
|
|
| 134 |
|
|
extru,<> save,7,8,r0
|
| 135 |
|
|
addib,tr,n 1,d_addr,store_final
|
| 136 |
|
|
extru,<> save,15,8,r0
|
| 137 |
|
|
addib,tr,n 2,d_addr,store_final
|
| 138 |
|
|
extru,<> save,23,8,r0
|
| 139 |
|
|
addib,tr 3,d_addr,store_final2
|
| 140 |
|
|
bv 0(r2)
|
| 141 |
|
|
stw save,0(d_addr)
|
| 142 |
|
|
|
| 143 |
|
|
store_final:
|
| 144 |
|
|
bv 0(r2)
|
| 145 |
|
|
store_final2:
|
| 146 |
|
|
stbys,e save,0(d_addr) /* delay slot */
|
| 147 |
|
|
|
| 148 |
|
|
first_null: /* null found in first word of aligned (wrt d_addr) */
|
| 149 |
|
|
addi -4,s_addr,s_addr
|
| 150 |
|
|
ldbx tmp6(s_addr),tmp4
|
| 151 |
|
|
add tmp6,s_addr,s_addr
|
| 152 |
|
|
comib,= 0,tmp4,done
|
| 153 |
|
|
stbs,ma tmp4,1(d_addr)
|
| 154 |
|
|
ldbs 1(s_addr),tmp4
|
| 155 |
|
|
comib,= 0,tmp4,done
|
| 156 |
|
|
stbs,ma tmp4,1(d_addr)
|
| 157 |
|
|
bv 0(r2) /* done */
|
| 158 |
|
|
stbs 0,0(d_addr)
|
| 159 |
|
|
|
| 160 |
|
|
first_null2: /* null found in first word of non-aligned (wrt d_addr) */
|
| 161 |
|
|
addibt,= -1,tmp6,check3 /* check last 3 bytes of word */
|
| 162 |
|
|
extru save,15,8,tmp4
|
| 163 |
|
|
addibt,=,n -1,tmp6,check2 /* check last 2 bytes */
|
| 164 |
|
|
bv 0(r2)
|
| 165 |
|
|
stbys,b save, 0(d_addr)
|
| 166 |
|
|
|
| 167 |
|
|
check3:
|
| 168 |
|
|
combt,= tmp4,r0,done
|
| 169 |
|
|
stbs,ma tmp4,1(d_addr)
|
| 170 |
|
|
check2:
|
| 171 |
|
|
extru,<> save,23,8,tmp4
|
| 172 |
|
|
bv 0(r2)
|
| 173 |
|
|
stbs,ma tmp4,1(d_addr)
|
| 174 |
|
|
bv 0(r2)
|
| 175 |
|
|
stbs r0,0(d_addr)
|
| 176 |
|
|
|
| 177 |
|
|
done:
|
| 178 |
|
|
EXIT(strcat)
|
