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Last change
on this file 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:
473 bytes
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| Line | |
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| 1 | .file "mempcpy.S" |
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| 2 | |
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| 3 | .section .text |
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| 4 | .global _mempcpy |
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| 5 | .type _mempcpy,@function |
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| 6 | _mempcpy: |
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| 7 | #ifdef __RX_DISALLOW_STRING_INSNS__ |
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| 8 | /* Do not use the string instructions - they might prefetch |
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| 9 | bytes from outside of valid memory. This is particularly |
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| 10 | dangerous in I/O space. */ |
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| 11 | |
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| 12 | cmp #0, r3 ; If the count is zero, do nothing |
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| 13 | beq 2f |
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| 14 | |
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| 15 | 1: mov.b [r2+], r5 |
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| 16 | mov.b r5, [r1+] |
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| 17 | sub #1, r3 |
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| 18 | bne 1b |
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| 19 | |
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| 20 | 2: rts |
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| 21 | #else |
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| 22 | smovf |
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| 23 | rts |
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| 24 | #endif |
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| 25 | .size _mempcpy, . - _mempcpy |
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