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https://github.com/autc04/Retro68.git
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95 lines
3.1 KiB
ArmAsm
95 lines
3.1 KiB
ArmAsm
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/*******************************************************************************
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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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.file "strcspn.s"
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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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/*
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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 strcspn (optimized assembler version: 80960K series, 80960CA)
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len = strcspn (string, charset)
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Return the number of characters in the maximum leading segment
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of string which consists solely of characters NOT from charset.
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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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*/
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.globl _strcspn
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.globl __strcspn
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.leafproc _strcspn, __strcspn
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.align 2
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_strcspn:
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#ifndef __PIC
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lda Lrett,g14
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#else
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lda Lrett-(.+8)(ip),g14
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#endif
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__strcspn:
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mov g14,g13 # save return address
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lda (g0),g3 # copy string pointer
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mov 0,g14 # conform to register conventions
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Lnext_char:
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ldob (g3),g7 # fetch next character of string
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addo 1,g1,g2 # g2 will be the charset ptr
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ldob (g1),g6 # fetch first character of charset
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cmpobe.f 0,g7,Lexit # quit if at end of string
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Lscan_set:
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cmpo g6,g7 # is charset char same as string char?
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ldob (g2),g5 # fetch next charset char
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addo 1,g2,g2 # bump charset ptr
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be.f Lexit
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cmpo g6,0 # is charset exhausted?
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lda (g5),g6
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bne.t Lscan_set # check next character of charset
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addo 1,g3,g3 # check next character of string
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b Lnext_char
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Lexit:
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subo g0,g3,g0 # compute string length
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bx (g13)
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Lrett:
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ret
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/* end of strcspn */
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