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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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|
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#define dest_hi r25 |
#define dest_hi r25 |
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.global _U(strncat) |
.global _U(strncat) |
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.type _U(strncat), @function |
.type _U(strncat), @function |
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_U(strncat): |
_U(strncat): |
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LOAD_Z(src_lo, src_hi) |
X_movw ZL, src_lo |
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LOAD_X(dest_lo, dest_hi) |
X_movw XL, dest_lo |
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.strncat_skip: |
.L_strncat_skip: |
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ld __tmp_reg__, X+ |
ld __tmp_reg__, X+ |
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tst __tmp_reg__ |
tst __tmp_reg__ |
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brne .strncat_skip |
brne .L_strncat_skip |
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sbiw XL, 1 ; undo post-increment (point the the NUL) |
sbiw XL, 1 ; undo post-increment (point the the NUL) |
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.strncat_loop: |
.L_strncat_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 .strncat_done |
brcs .L_strncat_done |
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ld __tmp_reg__, Z+ |
ld __tmp_reg__, Z+ |
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tst __tmp_reg__ |
tst __tmp_reg__ |
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st X+, __tmp_reg__ |
st X+, __tmp_reg__ |
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brne .strncat_loop |
brne .L_strncat_loop |
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; return dest (unchanged) |
; return dest (unchanged) |
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ret |
ret |
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.strncat_done: |
.L_strncat_done: |
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st X, __zero_reg__ |
st X, __zero_reg__ |
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; return dest (unchanged) |
; return dest (unchanged) |
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ret |
ret |
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.strncat_end: |
.L_strncat_end: |
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.size _U(strncat), .strncat_end - _U(strncat) |
.size _U(strncat), .L_strncat_end - _U(strncat) |
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#endif /* not __DOXYGEN__ */ |
#endif /* not __DOXYGEN__ */ |