FreeCalypso > hg > freecalypso-tools
annotate target-utils/libc/strlen.S @ 661:fd7b447b99e3
libserial rename
The version that was previously named libserial-newlnx is now libserial-linux,
and the version that was previosly named libserial-orig is now libserial-posix.
This new naming is more in line with the objective reality of the difference,
moving away from naming based on our project history.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 05 Mar 2020 19:54:31 +0000 |
parents | 3670e7768ab6 |
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rev | line source |
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95
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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1 .text |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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2 .code 32 |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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3 .globl strlen |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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4 strlen: |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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5 mov r1, r0 |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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6 1: ldrb r2, [r0], #1 |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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7 cmn r2, #0 |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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8 bne 1b |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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9 sbc r0, r0, r1 |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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10 bx lr |