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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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POSSIBILITY OF SUCH DAMAGE. */ |
POSSIBILITY OF SUCH DAMAGE. */ |
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/* $Id$ */ |
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/* |
/* |
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strncasecmp.S |
strncasecmp.S |
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Case insensitive compare |
Case insensitive compare |
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#if !defined(__DOXYGEN__) |
#if !defined(__DOXYGEN__) |
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.text |
.text |
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.global _U(strncasecmp) |
.global _U(strncasecmp) |
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.type _U(strncasecmp), @function |
.type _U(strncasecmp), @function |
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_U(strncasecmp): |
_U(strncasecmp): |
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LOAD_Z(s2_lo, s2_hi) |
X_movw ZL, s2_lo |
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LOAD_X(s1_lo, s1_hi) |
X_movw XL, s1_lo |
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.strncasecmp_loop: |
.L_strncasecmp_loop: |
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SUBI len_lo, lo8(1) |
SUBI len_lo, lo8(1) |
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SBCI len_hi, hi8(1) |
SBCI len_hi, hi8(1) |
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BRCS .strncasecmp_equal |
BRCS .L_strncasecmp_equal |
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LD ret_lo, X+ ; load *s1 |
LD ret_lo, X+ ; load *s1 |
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LD tmp, Z+ ; load *s2 |
LD tmp, Z+ ; load *s2 |
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MOV cht, tmp ; copy of *s2 to cht |
MOV cht, tmp ; copy of *s2 to cht |
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ORI cht, 0x20 ; make it lower case |
ORI cht, 0x20 ; make it lower case |
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CPI cht, 'a' ; test on [a .. z] |
CPI cht, 'a' ; test on [a .. z] |
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BRLT .strncasecmp_tst |
BRLT .L_strncasecmp_tst |
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CPI cht, 'z'+1 |
CPI cht, 'z'+1 |
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BRGE .strncasecmp_tst |
BRGE .L_strncasecmp_tst |
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ORI tmp, 0x20 ; we got an alpha in s2 |
ORI tmp, 0x20 ; we got an alpha in s2 |
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ORI ret_lo, 0x20 ; make *s1, *s2 lower case |
ORI ret_lo, 0x20 ; make *s1, *s2 lower case |
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.strncasecmp_tst: |
.L_strncasecmp_tst: |
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SUB ret_lo, tmp ; compare chars |
SUB ret_lo, tmp ; compare chars |
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BRNE .strncasecmp_done |
BRNE .L_strncasecmp_done |
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TST tmp ; end of s2? |
TST tmp ; end of s2? |
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BRNE .strncasecmp_loop |
BRNE .L_strncasecmp_loop |
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.strncasecmp_equal: |
.L_strncasecmp_equal: |
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SUB ret_lo, ret_lo ; clear ret_lo and C flag |
SUB ret_lo, ret_lo ; clear ret_lo and C flag |
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.strncasecmp_done: |
.L_strncasecmp_done: |
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; ret_hi = SREG.C ? 0xFF : 0 |
; ret_hi = SREG.C ? 0xFF : 0 |
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SBC ret_hi, ret_hi |
SBC ret_hi, ret_hi |
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RET |
RET |
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.strncasecmp_end: |
.L_strncasecmp_end: |
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.size _U(strncasecmp), .strncasecmp_end - _U(strncasecmp) |
.size _U(strncasecmp), .L_strncasecmp_end - _U(strncasecmp) |
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#endif /* not __DOXYGEN__ */ |
#endif /* not __DOXYGEN__ */ |