annotate target-utils/libc/strlen.S @ 956:b0b6966fa62e

doc/Target-boot-control: update for -Petmoff
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 07 Jun 2023 23:52:31 +0000
parents 3670e7768ab6
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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3670e7768ab6 target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
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1 .text
3670e7768ab6 target-utils/libc: strlen optimized assembly implementation added
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2 .code 32
3670e7768ab6 target-utils/libc: strlen optimized assembly implementation added
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3 .globl strlen
3670e7768ab6 target-utils/libc: strlen optimized assembly implementation added
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4 strlen:
3670e7768ab6 target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
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5 mov r1, r0
3670e7768ab6 target-utils/libc: strlen optimized assembly implementation added
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6 1: ldrb r2, [r0], #1
3670e7768ab6 target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
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7 cmn r2, #0
3670e7768ab6 target-utils/libc: strlen optimized assembly implementation added
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8 bne 1b
3670e7768ab6 target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
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9 sbc r0, r0, r1
3670e7768ab6 target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
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10 bx lr