diff options
Diffstat (limited to 'newlib/libc/machine/hppa/strncat.S')
| -rw-r--r-- | newlib/libc/machine/hppa/strncat.S | 238 |
1 files changed, 0 insertions, 238 deletions
diff --git a/newlib/libc/machine/hppa/strncat.S b/newlib/libc/machine/hppa/strncat.S deleted file mode 100644 index 89d8f3a..0000000 --- a/newlib/libc/machine/hppa/strncat.S +++ /dev/null @@ -1,238 +0,0 @@ -/* - * (c) Copyright 1986 HEWLETT-PACKARD COMPANY - * - * To anyone who acknowledges that this file is provided "AS IS" - * without any express or implied warranty: - * permission to use, copy, modify, and distribute this file - * for any purpose is hereby granted without fee, provided that - * the above copyright notice and this notice appears in all - * copies, and that the name of Hewlett-Packard Company not be - * used in advertising or publicity pertaining to distribution - * of the software without specific, written prior permission. - * Hewlett-Packard Company makes no representations about the - * suitability of this software for any purpose. - */ - -/*HPUX_ID: @(#) $Revision: 1.1 $ */ -/* strncat(s1,s2,n) : concatonate at most n characters from s2 onto s1 */ - -#include "DEFS.h" - -#define d_addr r26 -#define s_addr r25 -#define count r24 -#define tmp1 r19 -#define tmp2 r20 -#define tmp3 r21 -#define tmp4 r22 -#define tmp5 arg3 -#define tmp6 r31 -#define save r1 -#define tmp7 ret1 /* source offset-- reset to orig source addr if not aligned */ - - -ENTRY(strncat) - - comb,= r0,s_addr,quit /* quit if s2=NULL */ - copy d_addr,ret0 /* The return value is the value of d_addr. DELAY SLOT*/ - -/* First look for end of s1 (d_addr) */ - - extru d_addr,31,2,tmp1 /* Extract the low two bits of the dest address. */ - combt,= tmp1,r0,dont_mask - dep 0,31,2,d_addr /*set word alignment */ - ldwm 4(d_addr),tmp2 - sh3add tmp1,r0,save /* build mask based on tmp1 */ - mtctl save,11 - zvdepi -2,32,save - or save,tmp2,tmp2 - uxor,nbz tmp2,r0,save -search: - b,n found_end /* nullified under uxor conditions above and below */ -dont_mask: - ldwm 4(d_addr),tmp2 - comib,tr r0,r0,search - uxor,nbz tmp2,r0,save - -found_end: /* at this point d_addr points to word */ - extru,<> save,7,8,r0 /* following word with null */ - addib,tr,n -4,d_addr,begin_copy /*set d_addr to end of s1 */ - extru,<> save,15,8,r0 - addib,tr,n -3,d_addr,begin_copy - extru,<> save,23,8,r0 - addi -1,d_addr,d_addr - addi -1,d_addr,d_addr - - -begin_copy: - addibt,<,n -4,count,byteloop /* If count is <= 4 don't get fancy.*/ - - extru s_addr,31,2,tmp4 /* Extract the low two bits of the source address.*/ - extru d_addr,31,2,tmp5 /* Extract the low two bits of the destination address.*/ - add count,tmp5,count /* pre increment the count by the byte address so that the count is*/ - copy s_addr,tmp6 /* save original s_addr in case we find null in first word */ - copy s_addr, tmp7 /* save s_addr in case we find null before first store */ - comb,<> tmp5,tmp4,not_aligned /* branch if tmp5<>tmp4. */ - dep 0,31,2,s_addr /* Compute the word address of the source. DELAY SLOT.*/ -/* aligned*/ - combt,= tmp5,r0,skip_mask - ldwm 4(0,s_addr),tmp1 /* tmp1 = *s_addr s_addr += 4 (DELAY SLOT)*/ - sh3add tmp5,r0,save /* compute mask in save*/ - mtctl save,11 - zvdepi -2,32,save - or save,tmp1,tmp1 /* or mask with data*/ - uxor,nbz tmp1,r0,save /* check for null*/ - b,n null1 - addibt,< -4,count,back_porch - stbys,b,m tmp1,4(0,d_addr) /* store word (delay slot)*/ - -chunks: - ldwm 4(0,s_addr),tmp1 /* get a word*/ - -skip_mask: - uxor,nbz tmp1,r0,save /* check for null*/ - b,n align_null1 - addibf,< -4,count,chunks - stbys,b,m tmp1,4(0,d_addr) /* store word (delay slot)*/ - -back_porch: /* last word to store*/ - addibt,=,n 4,count,done /* if count = 0 we're, of course, done !*/ - ldws 0(s_addr),tmp1 /* load up the back_porch*/ - sh3add count,r0, save /* setup right mask based on count*/ - mtctl save,r11 - zvdepi -2,32,save /*save now has left-hand mask*/ - uaddcm r0,save,save /*form right hand mask */ - or tmp1,save,tmp1 /*and insert data*/ - uxor,nbz tmp1,r0,save /* check for null*/ - b,n null2 - add d_addr,count,d_addr/* final store address is +1 too high !*/ - b done - stbys,e tmp1,0(d_addr) /* done */ - -/* Begin non_aligned code. */ -not_aligned: - sub,>= tmp5,tmp4,tmp6 /* compute the shift amt.and skip load if tmp5 > tmp4.*/ - ldwm 4(0,s_addr),tmp1 /* load up the first word from the source. tmp1 = *s_addr++*/ - zdep tmp6,28,29,tmp4 /* compute the number of bits to shift */ - mtctl tmp4,11 /* load the shift count into cr11 = shift count register.*/ - addibt,<,n -4,count,chkchnk2 /* first step in pre adjustment of count for looping.*/ - - ldwm 4(0,s_addr),tmp2 /* get either first or second word from source. */ - combt,= tmp5,r0,skip_mask4 /* don't mask if whole word is valid*/ - vshd tmp1,tmp2,tmp3 /* position data ! (delay slot)*/ - sh3add tmp5,r0,save /* setup r1*/ - mtctl save,r11 /* setup mask in save*/ - zvdepi -2,32,save - or save, tmp3, tmp3 - mtctl tmp4,11 /* re-load the shift count into cr11 */ - -skip_mask4: - uxor,nbz tmp3, r0, save - b,n null4 /* special case for first word */ - copy r0, tmp5 /* zero out tmp5 so we don't try to mask again*/ - copy r0, tmp7 /* zero out tmp7 so we don't try to use original s_addr anymore */ - b continue - stbys,b,m tmp3,4(0,d_addr) /* store ! */ - -chunk2: - ldwm 4(0,s_addr),tmp2 - vshd tmp1,tmp2,tmp3 - -skip_mask2: - uxor,nbz tmp3, r0, save - b,n null3 - stbys,b,m tmp3,4(0,d_addr) /* store ! */ - -continue: - ldwm 4(0,s_addr),tmp1 /* get 2nd word ! */ - vshd tmp2,tmp1,tmp3 /* position data ! */ - uxor,nbz tmp3, r0, save - b,n null3 - - addibf,< -8,count,chunk2 /* If count is still >= 8 do another loop.*/ - stbys,b,m tmp3,4(0,d_addr) /* store !*/ - -chkchnk2: - addibt,<,n 4,count,bp_0 /* if we don't have 4 bytes left then do the back porch (bp_0)*/ - -subchnk2: /* we have less than 8 chars to copy*/ - - ldwm 4(0,s_addr),tmp2 /* get next word !*/ - combt,= tmp5,r0,skip_mask3 - vshd tmp1,tmp2,tmp3 /* position data !*/ - sh3add tmp5,r0,save /* setup r1*/ - mtctl save,r11 /* setup mask in save*/ - zvdepi -2,32,save - or save, tmp3, tmp3 - mtctl tmp4,11 /* restore shift value again */ -skip_mask3: - uxor,nbz tmp3,r0,save - b,n null3 - copy r0,tmp5 /* zero out tmp5 so null3 does correct alignment */ - copy r0,tmp7 /* zero out tmp7 so we don't use orignal s_addr since no longer valid */ - b bp_1 /* we now have less than 4 bytes to move*/ - stbys,b,m tmp3,4(0,d_addr) /* store !*/ - -bp_0: - copy tmp1,tmp2 /* switch registers for shift process */ - addibt,<=,n 4,count,done /* if count = -4 this implies that count = 0 -> done */ - -bp_1: - ldwm 4(0,s_addr),tmp1 /* get final word ! */ - vshd tmp2,tmp1,tmp3 /* position data !*/ - uxor,nbz tmp3,r0,save /* if no-byte-zero */ - b,n bp_null /* don't goto no_null-find which null instead */ -no_null: - add d_addr,count,d_addr /* set up d_addr for stbys,e */ - b done /* were done*/ - stbys,e tmp3,0(0,d_addr) /* store the data !*/ - -/* here we do ye old byte-at-a-time moves.*/ -align_null1: - b byteloop - addi -4,s_addr,s_addr -null1: - copy tmp6,s_addr /* restore orig s_addr (aligned only) */ -byteloop: - addibt,= 4,count,done -null2: - ldbs,ma 1(s_addr),tmp1 -encore: - combt,=,n tmp1,r0, done - stbs,ma tmp1,1(d_addr) - addibf,=,n -1,count,encore - ldbs,ma 1(s_addr),tmp1 - b,n done - -bp_null: - addi -4,count,count /* fudge count 'cause byteloop will re-increment */ - -null3: /* not_aligned case reset s_addr and finish byte-wise */ - combt,=,n r0,tmp7,null3a /* if tmp7 is not valid address then branch below */ - b byteloop /* otherwise reset s_addr to tmp7 and finish */ - copy tmp7, s_addr - -null3a: /* right shift target */ - addibt,<,n 0,tmp6,null3b /* if left shifting */ - sub r0,tmp6,tmp6 /* do null3b code */ - addi -4,tmp6,tmp6 - b byteloop - add tmp6,s_addr,s_addr /* reset s_addr by 4 + shift_amt */ - -null3b: - subi -8,tmp6,tmp6 - add tmp5,tmp6,tmp6 /* adjust by the dest offset if this is our first store */ - b byteloop - add tmp6,s_addr,s_addr /* adjust s_addr by (8-shift_amt-dest_off) */ - -null4: - add,> tmp6,r0,tmp6 /* if left shift */ - b,n null3 /* then do null3 */ - b byteloop - addi -4,s_addr,s_addr /* adj source only by 4 */ - -done: - bv 0(r2) - stbs r0,0(d_addr) -quit: -EXIT(strncat) |