FreeCalypso > hg > freecalypso-tools
annotate target-utils/libc/memcpy32.S @ 407:19e5a3e2f9c0
fcup-settime: moved time() retrieval a little closer to the output
A fundamental problem with all simple time transfer tools is that there is
always some delay between the time retrieval on the source system and that
transmitted time being set on the destination, and the resulting time
on the destination system is off by that delay amount. This delay cannot
be fully eliminated when working in a simple environment like ours,
but we should make our best effort to minimize it. In the present case,
moving the atinterf_init() call before the time() retrieval should make
a teensy-tiny improvement.
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Sat, 11 Aug 2018 21:52:17 +0000 |
| parents | 8dc062c6359b |
| children |
| rev | line source |
|---|---|
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90
8dc062c6359b
target-utils/libc: memcpy16 and memcpy32 optimized variants implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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1 .text |
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8dc062c6359b
target-utils/libc: memcpy16 and memcpy32 optimized variants implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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2 .code 32 |
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8dc062c6359b
target-utils/libc: memcpy16 and memcpy32 optimized variants implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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3 .globl memcpy32 |
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8dc062c6359b
target-utils/libc: memcpy16 and memcpy32 optimized variants implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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4 memcpy32: |
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8dc062c6359b
target-utils/libc: memcpy16 and memcpy32 optimized variants implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
5 1: subs r2, r2, #4 |
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8dc062c6359b
target-utils/libc: memcpy16 and memcpy32 optimized variants implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
6 ldrcs r3, [r1], #4 |
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8dc062c6359b
target-utils/libc: memcpy16 and memcpy32 optimized variants implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
7 strcs r3, [r0], #4 |
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8dc062c6359b
target-utils/libc: memcpy16 and memcpy32 optimized variants implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
8 bhi 1b |
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8dc062c6359b
target-utils/libc: memcpy16 and memcpy32 optimized variants implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
9 bx lr |
