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- #include <sysdep.h>
- #undef ret
- #define saved_lc r18
- #define str r19
- #define pos0 r20
- #define val1 r21
- #define val2 r22
- #define origadd r23
- #define tmp r24
- #define loopcnt r30
- #define len ret0
- ENTRY(strlen)
- .prologue
- alloc r2 = ar.pfs, 1, 0, 0, 0
- .save ar.lc, saved_lc
- mov saved_lc = ar.lc
- .body
- mov str = in0
- mov len = r0
- and tmp = 7, in0
-
- sub loopcnt = 8, tmp
- cmp.eq p6, p0 = tmp, r0
- (p6) br.cond.sptk .str_aligned;;
- adds loopcnt = -1, loopcnt
- mov ar.lc = loopcnt
- .l1:
- ld1 val2 = [str], 1
-
- cmp.eq p6, p0 = val2, r0
- (p6) br.cond.spnt .restore_and_exit
- adds len = 1, len
- br.cloop.dptk .l1
- .str_aligned:
- mov origadd = str
- ld8 val1 = [str], 8
- nop.b 0
- nop.b 0
- .l2: ld8.s val2 = [str], 8
- czx1.r pos0 = val1
-
- cmp.ne p6, p0 = 8, pos0
- (p6) br.cond.spnt .foundit
- chk.s val2, .recovery
- .back:
- mov val1 = val2
- br.cond.dptk .l2
- .foundit:
- sub tmp = str, origadd
- add len = len, pos0
- add len = len, tmp
- adds len = -16, len
- .restore_and_exit:
- mov ar.lc = saved_lc
- br.ret.sptk.many b0
- .recovery:
- adds str = -8, str;;
- ld8 val2 = [str], 8
- br.cond.sptk .back
- END(strlen)
- libc_hidden_def (strlen)
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