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lampret |
/*******************************************************************************
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*
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* Copyright (c) 1993 Intel Corporation
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*
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* Intel hereby grants you permission to copy, modify, and distribute this
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* software and its documentation. Intel grants this permission provided
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* that the above copyright notice appears in all copies and that both the
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* copyright notice and this permission notice appear in supporting
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* documentation. In addition, Intel grants this permission provided that
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* you prominently mark as "not part of the original" any modifications
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* made to this software or documentation, and that the name of Intel
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* Corporation not be used in advertising or publicity pertaining to
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* distribution of the software or the documentation without specific,
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* written prior permission.
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*
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* Intel Corporation provides this AS IS, WITHOUT ANY WARRANTY, EXPRESS OR
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* IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY
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* OR FITNESS FOR A PARTICULAR PURPOSE. Intel makes no guarantee or
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* representations regarding the use of, or the results of the use of,
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* the software and documentation in terms of correctness, accuracy,
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* reliability, currentness, or otherwise; and you rely on the software,
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* documentation and results solely at your own risk.
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*
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* IN NO EVENT SHALL INTEL BE LIABLE FOR ANY LOSS OF USE, LOSS OF BUSINESS,
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* LOSS OF PROFITS, INDIRECT, INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES
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* OF ANY KIND. IN NO EVENT SHALL INTEL'S TOTAL LIABILITY EXCEED THE SUM
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* PAID TO INTEL FOR THE PRODUCT LICENSED HEREUNDER.
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*
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******************************************************************************/
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/*
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* (c) copyright 1989,1993 Intel Corp., all rights reserved
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*/
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/*
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procedure strpbrk (optimized assembler version: 80960K series, 80960CA)
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char_addr = strpbrk (string, brkset_string)
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Return the address of the first character in string that is NOT
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in the brkset_string. Return NULL if none exists.
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At the time of this writing, only g0 thru g7 and g13 are available
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for use in this leafproc; other registers would have to be saved and
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restored. These nine registers, plus tricky use of g14 are sufficient
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to implement the routine.
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This routine stays out of g3 and g4 altogether. They may be used by
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the strtok routine, which calls this routine in an incestuous way.
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*/
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#ifdef __PIC
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.pic
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#endif
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#ifdef __PID
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.pid
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#endif
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.file "strprk.s"
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.globl _strpbrk
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.globl __strpbrk
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.leafproc _strpbrk, __strpbrk
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.align 2
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_strpbrk:
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#ifdef __PIC
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lda Lrett-(.+8)(ip),g14
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b __strpbrk
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#else
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lda Lrett,g14
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b __strpbrk
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#endif
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Lrett: ret
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__strpbrk:
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Lnext_char_strpbrk:
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addo 1,g1,g2 # g2 will be the brkset ptr
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ldob (g0),g7 # fetch next character of string
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ldob (g1),g6 # fetch first character of brkset
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cmpobe.f 0,g7,Lexit_char_not_found # quit if at end of string
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Lscan_set_strpbrk:
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cmpo g6,g7 # is brkset char equal to string char?
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ldob (g2),g5 # fetch next brkset char
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addo 1,g2,g2 # bump brkset ptr
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be.f Lexit_char_found
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cmpo g6,0 # is brkset_string exhausted?
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lda (g5),g6
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bne.t Lscan_set_strpbrk # check next character of brkset
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addo 1,g0,g0 # check next character of string
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b Lnext_char_strpbrk
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Lexit_char_not_found:
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mov 0,g0 # return null if brkset char not found in string
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Lexit_char_found:
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mov g14,g13 # save return address
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lda 0,g14 # conform to register conventions
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bx (g13)
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/* end of strpbrk */
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