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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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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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#include "macros.inc" |
#include "macros.inc" |
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.global _U(memcmp) |
.global _U(memcmp) |
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.type _U(memcmp), @function |
.type _U(memcmp), @function |
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_U(memcmp): |
_U(memcmp): |
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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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rjmp .memcmp_start |
rjmp .L_memcmp_start |
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.memcmp_loop: |
.L_memcmp_loop: |
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ld ret_lo, X+ |
ld ret_lo, X+ |
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ld __tmp_reg__, Z+ |
ld __tmp_reg__, Z+ |
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sub ret_lo, __tmp_reg__ |
sub ret_lo, __tmp_reg__ |
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brne .memcmp_done |
brne .L_memcmp_done |
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.memcmp_start: |
.L_memcmp_start: |
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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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brcc .memcmp_loop |
brcc .L_memcmp_loop |
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; strings are equal, so clear both ret_lo and carry |
; strings are equal, so clear both ret_lo and carry |
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sub ret_lo, ret_lo |
sub ret_lo, ret_lo |
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.memcmp_done: |
.L_memcmp_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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.memcmp_end: |
.L_memcmp_end: |
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.size _U(memcmp), .memcmp_end - _U(memcmp) |
.size _U(memcmp), .L_memcmp_end - _U(memcmp) |
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#endif /* not __DOXYGEN__ */ |
#endif /* not __DOXYGEN__ */ |