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Last change
on this file since 444 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
537 bytes
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| Line | |
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| 1 | #include "setarch.h" |
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| 2 | |
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| 3 | #include "defines.h" |
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| 4 | |
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| 5 | ; dst A0 |
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| 6 | ; src A1 |
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| 7 | ; len A2 |
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| 8 | .global ___reg_memcpy |
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| 9 | ___reg_memcpy: |
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| 10 | |
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| 11 | MOVP A0P,A3P ; keep copy of result |
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| 12 | ADDP A2P,A0P ; point to end of dst |
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| 13 | ADDP A2P,A1P ; point to end of src |
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| 14 | CMPP A0P,A3P ; see if anything to do |
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| 15 | beq quit |
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| 16 | |
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| 17 | loop: |
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| 18 | #ifdef __NORMAL_MODE__ |
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| 19 | sub #1,A1P ; point to byte |
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| 20 | #else |
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| 21 | subs #1,A1P ; point to byte |
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| 22 | #endif |
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| 23 | mov.b @A1P,A2L ; get byte |
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| 24 | mov.b A2L,@-A0P ; save byte |
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| 25 | CMPP A0P,A3P ; at the front again ? |
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| 26 | bne loop |
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| 27 | |
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| 28 | ; return with A0 pointing to dst |
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| 29 | quit: rts |
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| 30 | |
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