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32 * (c) copyright 1989,1993 Intel Corp., all rights reserved
36 procedure strpbrk (optimized assembler version: 80960K series, 80960CA)
38 char_addr = strpbrk (string, brkset_string)
40 Return the address of the first character in string that is NOT
41 in the brkset_string. Return NULL if none exists.
43 At the time of this writing, only g0 thru g7 and g13 are available
44 for use in this leafproc; other registers would have to be saved and
45 restored. These nine registers, plus tricky use of g14 are sufficient
46 to implement the routine.
48 This routine stays out of g3 and g4 altogether. They may be used by
49 the strtok routine, which calls this routine in an incestuous way.
61 .leafproc _strpbrk, __strpbrk
66 lda Lrett-(.+8)(ip),g14
78 addo 1,g1,g2 # g2 will be the brkset ptr
79 ldob (g0),g7 # fetch next character of string
80 ldob (g1),g6 # fetch first character of brkset
81 cmpobe.f 0,g7,Lexit_char_not_found # quit if at end of string
83 cmpo g6,g7 # is brkset char equal to string char?
84 ldob (g2),g5 # fetch next brkset char
85 addo 1,g2,g2 # bump brkset ptr
87 cmpo g6,0 # is brkset_string exhausted?
89 bne.t Lscan_set_strpbrk # check next character of brkset
90 addo 1,g0,g0 # check next character of string
94 mov 0,g0 # return null if brkset char not found in string
96 mov g14,g13 # save return address
97 lda 0,g14 # conform to register conventions